Digital Equipment RW524-ZA Service manual

Small Optical Disk Library
Service Manual
Part Number: EK–SOL10–SV.B01
Revision/Update Information:
Digital Equipment Corporation
Maynard, Massachusetts
This manual supersedes Part Number
EK–SOL10–SV.A01.
First printing, May 1993
Revision, October 1993
The information in this document is subject to change without notice and should not be
construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation
assumes no responsibility for any errors that may appear in this document.
The software described in this document is furnished under a license and may be used or copied
only in accordance with the terms of such license.
Digital Equipment Corporation assumes no responsibility for the use or reliability of its software
on equipment that is not supplied by Digital or its affiliated companies.
© Digital Equipment Corporation 1993.
Reproduced with Permission of the Hewlett-Packard Company
The following are trademarks of Digital Equipment Corporation: DEC, Digital, VAX,
VAX DOCUMENT, VMS, and the DIGITAL logo.
Torx is a registered trademark of the Camcar Division of Textron.
All other trademarks and registered trademarks are the property of their respective owners.
U.S.A.
This equipment generates, uses, and may emit radio frequency energy. The equipment has
been type tested and found to comply with the limits for a Class A computing device pursuant
to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection
against such radio frequency interference. Operation of this equipment in a residential area may
cause interference in which case the user at his own expense will be required to take whatever
measures may be required to correct the interference.
This document was prepared using VAX DOCUMENT, Version 2.1.
Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
xi
1 Introduction
1.1
1.2
1.3
1.3.1
1.3.2
1.4
1.4.1
1.4.2
1.5
1.6
1.7
1.8
Optical Disk Libraries Overview .
Product Features . . . . . . . . . . . . .
Optical Library Components . . . .
The Optical Drive Mechanism
Magneto-Optical Disks . . . . . .
SCSI Interface Options . . . . . . . .
Single-ended SCSI Interface .
Differential SCSI Interface . .
Product Matrix . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . .
Optical Disk Specifications . . . . . .
Related Documents . . . . . . . . . . .
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1–1
1–1
1–2
1–4
1–5
1–5
1–5
1–6
1–6
1–7
1–12
1–14
Environmental Requirements . . . . . . . . . . . . . . .
Operating Temperature/Clearance Requirements .
Location Requirements . . . . . . . . . . . . . . . . . . . .
Primary Power/External Ground . . . . . . . . . . . . .
Unpacking Procedure . . . . . . . . . . . . . . . . . . . . . .
Installation Procedures . . . . . . . . . . . . . . . . . . . .
Contents of Shipment . . . . . . . . . . . . . . . . . .
Uncrating the RW504/RW524 Optical Library
Installing the RW504/RW524 Optical Library
Checking the Fuse and Voltage Setting . . . . .
Changing the Voltage Configuration . . . .
Connecting an Uninterruptible Power Supply
(UPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware Verification . . . . . . . . . . . . . . . . . . . . .
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2–1
2–1
2–1
2–2
2–2
2–3
2–3
2–4
2–4
2–9
2–10
.......
.......
2–10
2–11
2 Environmental/Installation/PM
2.1
2.2
2.3
2.4
2.5
2.6
2.6.1
2.6.2
2.6.3
2.6.4
2.6.4.1
2.6.5
2.7
iii
2.8
2.8.1
2.8.2
2.9
Moving the RW504/RW524 Optical Disk Library . . . . .
Moving a Short Distance . . . . . . . . . . . . . . . . . . . .
Shipping the RW504/RW524 Optical Disk Library .
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . .
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2–12
2–12
2–13
2–15
Front Panel/Control Panel Operations . . . . . . . . . . . . . . . .
Rear Panel Features and Controls . . . . . . . . . . . . . . . . . . .
Setting and Displaying Configurations . . . . . . . . . . . . . . . .
Setting a Configuration (CONF) . . . . . . . . . . . . . . . . . .
Displaying Information Logs (INFO) . . . . . . . . . . . . . .
Choosing Tests and Displaying Results (TEST) . . . . . .
Setting the SCSI Address . . . . . . . . . . . . . . . . . . . . . . .
Securing the Optical Disk Library . . . . . . . . . . . . . . . .
Setting a New Security Code . . . . . . . . . . . . . . . . . . . .
Restricting Disk Insertion and Removal . . . . . . . . . . .
Setting CONF 15 or CONF 20 . . . . . . . . . . . . . . . .
Controlling Mailslot Rotation . . . . . . . . . . . . . . . . . . . .
Host Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autochanger Configuration Choices . . . . . . . . . . . . . . . . . .
3–1
3–3
3–5
3–5
3–5
3–6
3–7
3–8
3–8
3–10
3–10
3–11
3–11
3–12
3 Product Operation and Configuration
3.1
3.2
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.7
3.3.7.1
3.3.8
3.3.9
3.4
4 Troubleshooting and Diagnostics
Operation/Installation Error Information . . . . . . . . . . .
Power-on Self-tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Disk Cleaning . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Tools Available . . . . . . . . . . . . . . . . . . . .
Using the Eject Tool to Remove a Disk from the Drive
Troubleshooting Using the Control Panel and
Observation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.1
The Autochanger Lists the First ‘‘Possibles’’ . . . . .
4.5.2
How to Use the Results of the Internal Tests . . . . .
4.5.3
The FRU Isolation Test Sequence . . . . . . . . . . . . .
4.6
Information Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7
Recovery from Hardware Errors . . . . . . . . . . . . . . . . .
4.7.1
Hardware Error Codes and Recovery Procedures . .
4.8
Error Information Through SCSI Commands . . . . . . .
4.9
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.1
Offline Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.2
Internal Diagnostic Tests . . . . . . . . . . . . . . . . . . . .
4.10
Diagnostic Test Command Descriptions . . . . . . . . . . . .
4.10.1
Sequence Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
4.2
4.3
4.3.1
4.4
4.5
iv
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4–2
4–6
4–7
4–8
4–9
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4–10
4–11
4–12
4–14
4–15
4–20
4–20
4–30
4–31
4–32
4–32
4–33
4–34
4.10.2
Electronic Core Tests . . . . . . . . . . . . . . . . . . . . . .
4.11
The FIND HOME Sequence and Information Logs . . .
4.11.1
Specific Steps of the FIND HOME Sequence . . . . .
4.12
Micro-Move Reference Table for Viewing FIND HOME
Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...
...
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4–38
4–41
4–41
...
4–44
Field-Replaceable Assemblies . . . . . . . . . . . . . . . . . . . . . . .
ESD Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly/Disassembly Procedures . . . . . . . . . . . . . . . . . . .
Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Autochanger Controller PCA . . . . . . . . .
Replacing the Front Bezel Assembly . . . . . . . . . . . . . .
Replacing the Front Operation Switch/Cable
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Fan/Display/Operation Button
Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Mailslot Assembly . . . . . . . . . . . . . . . . .
Replacing the Optical Drive Mechanism . . . . . . . . . . .
Replacing the Interconnect PCA . . . . . . . . . . . . . . . . .
Replacing the Picker/Carriage Assembly . . . . . . . . . . .
Replacing the Leadscrew Assembly . . . . . . . . . . . . . . .
Replacing the Power Supply . . . . . . . . . . . . . . . . . . . .
Replacing the Magazine Guides . . . . . . . . . . . . . . . . . .
Replacing the Internal UPS Cable . . . . . . . . . . . . . . . .
Replacing the SCSI Cable . . . . . . . . . . . . . . . . . . . . . .
Reinitializing the Autochanger Controller PCA RAM after
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables Set by Configuration 16 . . . . . . . . . . . . . . . .
Variables Set by Configuration 18 . . . . . . . . . . . . . . . .
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Service Kit . . . . . . . . . . . . . . . . . . . . . .
5–1
5–1
5–2
5–2
5–2
5–4
5–8
5 Removal and Replacement
5.1
5.2
5.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.4.9
5.4.10
5.4.11
5.4.12
5.4.13
5.4.14
5.5
5.5.1
5.5.2
5.6
5.6.1
5–10
5–12
5–14
5–16
5–22
5–23
5–26
5–29
5–31
5–33
5–33
5–34
5–34
5–35
5–36
5–36
6 Theory of Operation
6.1
6.1.1
6.1.2
6.2
6.3
6.4
The Autochanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Movements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Autochanger Controller PCA . . . . . . . . . . . . . . . . .
The Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Multifunction Optical Drive and Drive Controller .
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6–1
6–1
6–4
6–4
6–7
6–8
v
Controller PCA . . . . . . . . . . . . . . . . . . . . . .
SCSI Controller . . . . . . . . . . . . . . . . . .
Data Buffer . . . . . . . . . . . . . . . . . . . . .
Formatter/Sequencer . . . . . . . . . . . . . .
Servo PCA . . . . . . . . . . . . . . . . . . . . . . . . .
DSP Microprocessor and Support/Servo
Loops . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.2.2
Read and Write Channel Electronics . .
6.4.3
Mechanism Assembly . . . . . . . . . . . . . . . . .
6.4.3.1
Loader Mechanism . . . . . . . . . . . . . . . .
6.4.3.2
Optical Head . . . . . . . . . . . . . . . . . . . .
6.5
Optical Disk Layout and Error Correction . . . .
6.5.1
Optical Disk Layout—650-Mbyte Capacity .
6.5.2
User Zone Layout—650-Mbyte Capacity . .
6.5.3
Optical Disk Layout—1.3-Gbyte Capacity .
6.5.4
User Zone Layout—1.3-Gbyte Capacity . . .
6.5.5
Drive Defect Management . . . . . . . . . . . . .
6.5.6
Slip Sparing Algorithm . . . . . . . . . . . . . . .
6.5.7
Replacement Sparing Algorithm . . . . . . . .
6.5.8
Error Thresholds . . . . . . . . . . . . . . . . . . . .
6.6
Error Detection and Recovery . . . . . . . . . . . . .
6.6.1
Error Detection . . . . . . . . . . . . . . . . . . . . .
6.6.2
Error Recovery Processes . . . . . . . . . . . . . .
6.6.3
SCSI Detected Errors . . . . . . . . . . . . . . . . .
6.6.4
Move Errors . . . . . . . . . . . . . . . . . . . . . . . .
6.6.5
Hardware Error Codes . . . . . . . . . . . . . . . .
6.6.6
Real Time Event Logging . . . . . . . . . . . . . .
6.7
The SCSI Interface . . . . . . . . . . . . . . . . . . . . .
6.7.1
SCSI Command Set . . . . . . . . . . . . . . . . . .
6.4.1
6.4.1.1
6.4.1.2
6.4.1.3
6.4.2
6.4.2.1
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Control
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6–8
6–9
6–9
6–9
6–9
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6–9
6–10
6–10
6–10
6–10
6–10
6–11
6–11
6–14
6–14
6–18
6–20
6–20
6–21
6–22
6–23
6–24
6–24
6–25
6–26
6–26
6–27
6–27
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A–1
A–3
A–13
A–27
A Offline Diagnostic Information
A.1
A.2
A.3
A.4
vi
System Error Report . . . .
Autochanger Error Codes .
Drive SCSI-2 Reference . .
Offline Diagnostics . . . . . .
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B Basic Supplies and Reorderable Parts
B.1
Basic Supplies and Reorderable Parts . . . . . . . . . . . . . . . .
B–1
C Connecting Multiple Optical Libraries
C.1
C.2
C.3
Connecting Two Optical Library Units to Two SCSI Ports
..............................................
Connecting Two Optical Library Units to One SCSI
Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting Controller and Drive SCSI Addresses . . . . . . . .
C–1
C–2
C–3
Index
Figures
1–1
2–1
2–2
2–3
2–4
3–1
3–2
4–1
4–2
4–3
4–4
5–1
5–2
5–3
5–4
5–5
5–6
5–7
5–8
5–9
Optical Disk Library Components . . . . . . . . . . . . . .
Removing the Shipping Screw . . . . . . . . . . . . . . . . .
Attaching the SCSI Cable to the RW504/RW524
Optical Disk Library . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Shipping Screw . . . . . . . . . . . . . . . . .
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Information and Tests Through the Control Panel . .
The Autochanger Returns Suspect FRUs . . . . . . . . .
How Service Views the Suspect FRUs . . . . . . . . . . .
Information and Tests Through the SCSI Bus . . . . .
Controller PCA Cable Connections . . . . . . . . . . . . . .
Removing the Autochanger Controller PCA . . . . . . .
Dip Switch Location on the Controller PCA . . . . . . .
Front Bezel Mounting Screws . . . . . . . . . . . . . . . . .
Disconnecting the Mailslot Sensor Cable and Front
Panel Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Display Assembly . . . . . . . . . . . . . . .
Mailslot Mounting Screws . . . . . . . . . . . . . . . . . . . .
Picker Service Position . . . . . . . . . . . . . . . . . . . . . . .
Optical Drive Mechanism Cable Connections . . . . . .
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1–3
2–4
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2–6
2–8
2–14
3–1
3–3
4–10
4–11
4–13
4–31
5–5
5–6
5–7
5–9
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5–10
5–13
5–15
5–17
5–18
vii
5–10
5–11
5–12
5–13
5–14
5–15
5–16
5–17
5–18
5–19
5–20
5–21
5–22
5–23
5–24
6–1
6–2
6–3
6–4
6–5
6–6
6–7
6–8
A–1
A–2
A–3
A–4
C–1
viii
Drive Mounting Screws and Optical Sensor Cable
Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sliding the Drive Mechanism Out of the Library . . . . .
Removing the Drive Plate and Optical Sensor . . . . . . .
Removing the Interconnect PCA . . . . . . . . . . . . . . . . .
Removing the Carriage/Picker Assembly . . . . . . . . . . .
Removing the Carriage Shaft . . . . . . . . . . . . . . . . . . . .
Removing the Leadscrew Mounting Screw . . . . . . . . . .
Securing the Picker to the Top of the Autochanger . . .
Removing the Leadscrew Assembly . . . . . . . . . . . . . . .
Preparing the Leadscrew Assembly for
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Power Supply Assembly . . . . . . . . . . . .
Removing the Magazine Guides . . . . . . . . . . . . . . . . . .
Optical Disk Library Exploded View (Sheet 1 of 3) . . .
Optical Disk Library Exploded View (Sheet 2 of 3) . . .
Optical Disk Library Exploded View (Sheet 3 of 3) . . .
SCSI Command Translation for Autochanger
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autochanger Controller PCA Block Diagram . . . . . . . .
Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Disk Layout . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Zone Layout for 650-Mbyte Media . . . . . . . . . . . .
User Zone Layout for 1.3-Gbyte Media, g=1 . . . . . . . . .
User Zone Layout for 1.3-Gbyte,g=16 . . . . . . . . . . . . . .
Error Detection and Recovery . . . . . . . . . . . . . . . . . . .
System Error Report . . . . . . . . . . . . . . . . . . . . . . . . . .
Jukebox Request Sense Data Parameter Block
Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jukebox Request Sense—Additional Sense Data . . . . .
Drive Request Sense Data Parameter Format . . . . . . .
Connecting Two Optical Library Units (RW504/RW524)
to One SCSI Port . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5–19
5–20
5–21
5–23
5–24
5–25
5–26
5–27
5–28
5–29
5–30
5–32
5–39
5–40
5–41
6–2
6–5
6–8
6–12
6–13
6–15
6–16
6–22
A–2
A–3
A–5
A–14
C–2
Tables
1
1–1
1–2
1–3
1–4
1–5
2–1
2–2
3–1
3–2
3–3
4–1
4–2
4–3
4–4
4–5
4–6
4–7
5–1
5–2
5–3
6–1
6–2
6–3
6–4
6–5
6–6
A–1
A–2
A–3
A–4
A–5
Conventions Used in This Guide . . . . . . . . . . . . . .
RW504/RW524 Components . . . . . . . . . . . . . . . . . .
Optical Disk Library Products Matrix . . . . . . . . . .
Specifications and Characteristics of Optical Disks
Related Documentation . . . . . . . . . . . . . . . . . . . . .
Pass Documents . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Specifications and Part Numbers . . . . . . . . .
UPS Power Requirements . . . . . . . . . . . . . . . . . . .
Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel Features and Controls . . . . . . . . . . . . .
Autochanger Configuration Choices . . . . . . . . . . . .
Operation/Installation Troubleshooting . . . . . . . . .
Information Logs (INFO Logs) . . . . . . . . . . . . . . . .
Recovery Procedures for Specific Hardware Errors
Sequence Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exerciser Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Core Tests . . . . . . . . . . . . . . . . . . . . . . .
RW504/RW524 Micro-Move ID Table . . . . . . . . . . .
SW2 Default Settings . . . . . . . . . . . . . . . . . . . . . . .
Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . .
Non-exchange Assemblies . . . . . . . . . . . . . . . . . . .
Values for n and m for 1.3-Gbyte with g=16 (1024
media) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Revolution to Logical Track Layout . . . . .
Error Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . .
Group 0 Commands (6-byte command) . . . . . . . . .
Group 1 and 2 Commands (10-byte command) . . . .
Group 5 Commands (12-byte command) . . . . . . . . .
Sense Key and Additional Sense Length Values . .
Autochanger Move Errors . . . . . . . . . . . . . . . . . . .
Autochanger Micro-Move Error Codes . . . . . . . . . .
Drive Request Sense - Additional Sense Code
Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP-Specific Drive Error Codes . . . . . . . . . . . . . . . .
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xii
1–4
1–6
1–12
1–14
1–14
2–9
2–11
3–2
3–3
3–12
4–2
4–16
4–21
4–34
4–36
4–38
4–44
5–8
5–36
5–37
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6–17
6–17
6–22
6–28
6–29
6–30
A–4
A–9
A–11
...
...
A–16
A–19
ix
Preface
This manual assumes you are familiar with computer terms. It is divided into
seven chapters and three appendixes and is organized to allow you to quickly
find the information that you need.
This manual contains the following information:
•
Chapter 1 provides an introduction that lists the features and components,
product configurations, and the characteristics of the drive mechanism and
the disks for the RW504-ZA and the RW524-ZA optical disk libraries. This
manual refers to these optical disk libraries as RW504 and RW524.
•
Chapter 2 provides environmental, installation and preventive maintenance information on the RW504 and RW524 optical disk libraries.
•
Chapter 3 provides configuration and operating information on the RW504
and RW524 optical disk libraries.
•
Chapter 4 provides troubleshooting and diagnostics information on the
RW504 and RW524 optical disk libraries.
•
Chapter 5 provides removal and replacement procedures for the fieldreplaceable assemblies in the RW504 and RW524 optical disk libraries.
•
Chapter 6 provides theory of operation information on the RW504 and
RW524 optical disk libraries.
•
Appendix A provides offline diagnostic information, a VAX system error
report sample and SCSI-2 reference.
•
Appendix B provides a list of basic supplies and reorderable parts.
•
Appendix C lists information about, and procedures for, connecting multiple
optical libraries.
xi
Conventions Used in This Guide
Table 1 Conventions Used in This Guide
xii
Convention
Use
Italics
Italic text is used for titles of manuals and other publications.
Monospace type
Anything that is displayed on the control panel of the
optical disk library is set in this monospace type.
Boldface type
Anything that you are asked to type is set in this
boldface type.
Keys
Keys indicate the key to press on the control panel of the
optical disk library.
Note
A note calls attention to information which is helpful in
understanding the operation of the product.
CAUTION
Caution notes provide information that protects your optical
disk library from being damaged.
WARNING
Warning notes provide information that protects you from being
harmed.
1
Introduction
1.1 Optical Disk Libraries Overview
The RW504-ZA and RW524-ZA are optical disk libraries that contain a
multifunction optical drive. They have storage slots for sixteen 5.25-inch
optical disks for a total storage capacity of 10 Gbytes or 20 Gbytes, respectively.
Both rewritable and write-once optical disks can be used; they must be 512 bytes
per sector format.
There are two basic optical disk libraries:
•
RW504-ZA (known as the RW504)
•
RW524-ZA (known as the RW524)
The main difference between these two library versions is storage capacity. The
RW524 has approximately twice the storage capacity of the RW504. This added
capacity is due to a difference in the optical drives contained in the libraries. The
RW524 contains a 1.3-Gbyte drive, an enhanced version of the 650-Mbyte drive
that is used in the RW504 version libraries. The 1.3-Gbyte drive supports the use
of 1.2-Gbyte disks as well as the 594-Mbyte disks that are supported for use with
650-Mbyte drives. Other than the added support of 1.2-Gbyte disks, the RW524
libraries are mechanically, electrically, and operationally the same as the RW504
libraries, and both versions support the SCSI-2 command set.
1.2 Product Features
The optical disk library has the following features and meets the following
specifications:
•
Direct online access to data
•
High reliability and data security when using rewritable and write-once
5.25-inch optical disks
Introduction 1–1
DEC magneto optical disks meet the following standards:
594 Mbyte rewritable optical disks are Continuous Composite (CC)
format, conform to ISO/IEC 10089A; ANSI X3.212-199x and 1.2 Gbyte
optical disks meet ECMA 184 standard for CC format.
594 Mbyte write-once disks are Continuous Composite Write-Once (CCW)
format, conform to ISO/IEC DIS 11560; ANSI X3.220-199x and 1.2 Gbyte
optical disks meet ECMA 184 standard for CCW format.
•
Data security through the ability to ‘‘lock’’ the library, preventing disk
removal.
•
SCSI Interface
Single-ended
SCSI-2 command set
•
Autochanger reliability of:
40,000 hours MTBF (Mean Time Between Failure)
300,000 MSBF (Mean Swaps Between Failure)
•
Modular replacement of all major assemblies
•
Digital signal processor (DSP) based servo built into the drive mechanism for
faster seek times and lower error rates
•
Split optics resulting in the use of a lighter optical head for faster and more
accurate data access
•
Full read and write data caching to optimize system performance
1.3 Optical Library Components
Usually each SCSI-connect peripheral requires one SCSI address. With the disk
library, however, there are two unique SCSI interface addresses— one SCSI
address for the autochanger controller and one for the drive contained in the disk
library.
The autochanger controller and the host operating system manage communication
through the SCSI bus to each drive’s unique SCSI address.
Table 1–1 is a discussion of the optical library components. Refer to Figure 1–1
for component locations.
1–2 Introduction
Figure 1–1 Optical Disk Library Components
6 Carriage & Rails
3 Mailslot
2 Storage Slots
7 Picker
1 Disk Drive
MK445−01
Introduction 1–3
Table 1–1 RW504/RW524 Components
Component
Description
Disk Drive
The optical disk library contains one multifunction optical
disk drive for read/write data transfer. The drive requires
its own unique SCSI address and is located next to the front
panel at the bottom of the optical library. See Section 1.3.1 for
additional drive information.
Storage Slots
The optical disk library contains 16 storage slots for holding
optical disks.
Mailslot
The mailslot is used to insert or remove optical disks from the
disk library.
Front Panel
The front panel includes a control panel used to manage and
display library functions and a mailslot for inserting and
removing disks. Control panel functions are described in
Section 3.1.
Rear Panel
The rear panel includes SCSI and power cord connections,
a fuse receptacle, a 9-pin serial connector for attaching an
uninterruptable power supply (UPS), and a voltage select
switch.
Rail and Carriage
The rail and carriage support the picker for its movement
within the disk library.
Picker
The picker rotates, flips, and transports optical disks to and
from the storage slots, mailslot, and optical drive.
The RW504/RW524 is available as a single-ended SCSI interface.
1.3.1 The Optical Drive Mechanism
The optical drive mechanism is a multifunction drive and, therefore, operates
in both rewritable and write-once modes. The drive uses both rewritable and
write-once 5.25-inch magneto-optical disks that comply with ANSI and ISO
standards for Continuous Composite format. The drive senses the disk type and
automatically operates in either rewritable or write-once mode.
The drive has a 3600 rpm rotational speed and can achieve a maximum sustained
write transfer rate of 0.5 to 0.8 Mbytes per second and a maximum sustained
read transfer rate of 1- to 1.6-Mbyte per second, depending on the media and
drive capacity. The error rate is less than one block in error per 1014 bytes.
Immediate response mode and write caching are used by the drive mechanism
to achieve its high write performance. However, if a power failure occurs while
write data is in the buffer, the drive may not have enough power to complete
the write operation and empty the buffer. Therefore we recommend that an
1–4 Introduction
uninterruptable power supply (UPS) be used with battery backup to ensure that
no data is lost if a power failure occurs.
1.3.2 Magneto-Optical Disks
Magneto-Optical (MO) disks are more durable, more reliable, removable, and cost
far less per megabyte than magnetic disks. MO disks are made of the same kind
of plastic used in bullet-proof windows. Data can be read through fingerprints
and minor scratches. MO disks can withstand x-rays, magnetic interference, and
can be dropped from desk height without damage.
Magneto-Optical disks store data on a magnetic layer in the form of magnetic
flux reversals rather than on a pitted surface used in other optical technologies.
Because surfaces of the MO disk are not physically changed, they can be written
to and erased repeatedly with no measurable data degradation. Optical disks
have an archival life of thirty years based on accelerated life tests for data
retention.
The disk is mounted in a rigid plastic case with a metal shutter, similar to a
3.5-inch magnetic flexible disk. Optical disk storage capacity varies depending
on the disk type. (Check the host system documentation to determine which disk
format is supported.) The MO disk has two recording sides. To access the second
side, the cartridge must be ejected, turned over, and reinserted into the drive.
There are two types of magneto-optical disks: rewritable optical disks and writeonce optical disks. (Check the host system documentation to determine which
disk type(s) are supported.) The two disk types can be differentiated by the words
‘‘rewritable’’ or ‘‘write-once’’ printed on the disk’s metal shutter.
For data safety, you can independently write-protect each side of the disk by
setting the write-protect tab on the corner of the cartridge.
1.4 SCSI Interface Options
The optical disk library connects to the host system with a single-ended SCSI
interface This interface conforms to SCSI standards ANSI X3.131-SCSI-2.
1.4.1 Single-ended SCSI Interface
The single-ended interface specifies the use of a single-ended SCSI repeater PCA.
This PCA enables the library to be connected to an external single-ended SCSI
bus. The total SCSI cable length between peripherals and the host is 6 meters.
In addition, an internal SCSI cable length of 2.1 meters must be included in this
calculation.
Introduction 1–5
1.4.2 Differential SCSI Interface
The differential SCSI interface specifies the use of a differential SCSI repeater
PCA. This PCA enables the library to be connected to an external differential
SCSI bus. The differential SCSI repeater PCA uses the equivalent of 10 meters
of SCSI cable internally, so the allowable external cable length is limited to 15
meters instead of the 25 meters usually allowed on a differential SCSI bus.
1.5 Product Matrix
The following products are discussed in this manual. To determine the product
and option numbers, find the product information labels located on the library’s
rear panel and check the corresponding information in Table 1–2.
Table 1–2 Optical Disk Library Products Matrix
Product No.
/Options
Description
HP Designation
RW504-ZA
10.4-Gbyte multifunction optical disk library—
includes one 650-Mbyte 5.25-inch multifunction
optical drive mechanism and a single-ended SCSI
interface.
Model 10LC
(C1718C)
RW524-ZA
20.8-Gbyte multifunction optical disk library—
includes one 1.3-Gbyte 5.25-inch multifunction
optical drive mechanism and a single-ended SCSI
interface.
Model 20LT
(C1718T)
RW524-UB
Converts 650-Mbyte multifunction drives to 1.3
Gbyte multifunction drives to be used with a
RW504 jukebox. Consists of one 1.3-Gbyte drive,
RFI shield, and installation guide.
1–6 Introduction
1.6 Specifications
This section provides:
•
Performance Specifications
•
Physical Characteristics
•
Environmental Specifications
•
Power Requirements
•
Service Characteristics
•
Product Certification
Introduction 1–7
Performance Specifications
Optical Disk Library System
Capacity
16 disks
10.4 Gbytes (RW504) or
20.8 Gbytes (RW524)
Drives
1, 5.25-inch multifunction 650-Mbyte (RW504)
or 1.3-Gbyte (RW524)
optical disk drive
Average disk exchange time (excluding
drive load/unload sequences)
7 seconds
Interface
Single-ended asynchronous SCSI
Multifunction Optical Drives
650 Mbytes
1.3 Gbytes
Rotational speed
3600 rpm
2400 rpm
Average seek
25 ms
23.5
Short stroke seek (across 2.2 Mbytes)
8 ms
4 ms
Full stroke seek
50 ms
45 ms
Single track seek (track-to-track)
2 ms
2 ms
Average rotational delay
8.33 ms
12.5 ms
Bias magnet rotation time
8 ms (maximum)
8 ms (maximum)
Average access time
35 ms
Burst transfer rate
3 Mbytes/s (asynchronous)
3 Mbytes/s
(asynchronous)
5 Mbytes/s (synchronous)
5 Mbytes/s
(synchronous)
1 Mbyte/s (read)
.8-1.6 Mbyte/s
(read)
.5 Mbytes/s (write)
.4-.8 Mbytes/s
(write)
Load time (including spin-up)
2.5 seconds (average)
2.3 seconds
(average)
Unload time (including spin-down)
2.0 seconds (average)
1.4 seconds
(average)
Data transfer rate (host dependent)
1–8 Introduction
Multifunction Optical Drives
650 Mbytes
1.3 Gbytes
Read/Write error rate
Less than 1 block in
error per 1014 bytes
Less than 1 block
in error per 1014
bytes
Seek error rate
Less than 1 per 105
seeks
Interface
SCSI-2
single-ended
SCSI-2
single-ended
RW504/RW524 Physical Characteristics
Height
493.8 mm (19.4 in)
Width
220.0 mm (8.7 in)
Depth
693.4 mm (27.3 in)
Weight (net)
34.9 kg (77.5 pounds)
Weight (packaged)
40.8 kg (90.0 lbs)
RW504/RW524 Environmental Specifications
Temperature gradient
10° C per hour
Temperature (operating)
10° to 40° C
Temperature (nonoperating)
-40° to 70° C
Relative humidity (noncondensing)
operating
10 to 90%
nonoperating
5 to 95%
Max. wet bulb temperature
29° C
Shock (nonoperating)
292 ips (30 g trapezoidal)
Vibration (5-500 Hz)
operating
~0.21 g rms
nonoperating, random
~2.09 g rms
nonoperating swept-sine
0.5 g peak
Altitude (operating)
15,000 ft (4,572 m)
Altitude (nonoperating)
50,000 ft (15,240 m)
Acoustic emissions
Introduction 1–9
RW504/RW524 Environmental Specifications
operating
61.5 dB (L noise power
emission level)
idle
47 dB (L noise power
emission level)
Particulates
Less than 200
micrograms/cubic meter
particles suspended
Electrostatic discharge
Airgap (operating)
0 to 10 kV
Airgap (nonoperating survival)
0 to 25 kV
Direct contact (operating)
0 to 5 kV
Direct contact (nonoperating survival)
0 to 8 kV
Cooling requirements
15 CFM bidirectional
through drive
RW504/RW524 Power Requirements
Line voltage (115V setting)
100-127V
Line voltage (230V setting)
200-240V
Line frequency
50-60Hz
Power consumption (typical)
Less than 70 W
Power consumption (maximum)
100 W
RW504/RW524 Service Characteristics
Mean time between failure
40,000 power-on hours
Mean swaps between failure
300,000
Mean time to repair
1 hour
Preventive maintenance
none required
RW504/RW524 Product Certifications
Safety
1–10 Introduction
EN 60950/IEC 950
UL 1950 listed or
recognized
CSA 950-M89
TUV approved to VDE
0805 05.90
RW504/RW524 Product Certifications
Electromagnetic emissions
FCC 47 CFR Part 15
Subpart J - Class ‘‘B’’
EN 55022/CISPR 22,
Level ‘‘B’’; SABS
VCCI Level 2
Laser
CDRH 21 CFR Chapter
1, Subpart J Registered
IEC 825
TUV approved to
VBG93, VDE 0837
TTL to Decision 472
BS 4803 part 2
Approved
Introduction 1–11
1.7 Optical Disk Specifications
Table 1–3 Specifications and Characteristics of Optical Disks
Physical Characteristics
Rewritable
Write-once
Disk
5.25 in. diameter (130 mm)
5.25 in. diameter (130
mm)
Capacity (512-byte
sectors) (1x)1
594 Mbytes (297 Mbytes/side)
(formatted)
594 Mbytes (297 Mbytes
/side) (formatted)
Capacity (512-byte
sectors) (2x)2
1.2 Gbytes (594 Mbytes/side)
(formatted)
1.2 Gbytes (594 Mbytes
/side) (formatted)
Format (1x)
Continuous Composite (CC)
(ISO 10089)
CCW (ISO 11560)
Format (2x)
Continuous Composite (CC)
(ISO 10089),ECMA 184 for CC
format
CCW (ISO 11560), ECMA
184 standard for CCW
format
Bytes per sector
512 (medium dependent)
512 (medium dependent)
Sectors per track
31 (medium dependent)
31 (medium dependent)
Physical tracks per side
(1x)
18751
18751
Physical tracks per side
(2x)
21600
21600
Physical tracks per inch
(1x)
15875
15875
Physical tracks per inch
(2x)
18273
18273
Error Rate
Less than 1 block in error per
1014 bytes
Less than 1 block in error
per 1014 bytes
Security
Write protect tab (1 per side)
Write protect tab (1 per
side)
Medium archival life
30 years
30 years
1 In
this table, 1x refers to 594-Mbyte.
2 In
this table, 2x refers to 1.2-Gbyte.
(continued on next page)
1–12 Introduction
Table 1–3 (Cont.) Specifications and Characteristics of Optical Disks
Environmental
Specifications
Rewritable
Write-once
Temperature (operating)
10° to 50° C
10° to 50° C
Temperature (nonoperating)
-10° to 50° C long term
(> 14 days)
-10° to 50° C long term
(> 14 days)
-10° to 55° C short-term ( 14
days)
-10° to 55° C short-term (
14 days)
Temperature gradient
10° C per hour
10° C per hour
Maximum wet bulb
temperature
29° C
29° C
Humidity (operating)
10 to 80 percent (noncondensing)
10 to 80 percent
(noncondensing)
Humidity (nonoperating)
10 to 90 percent (noncondensing)
10 to 90 percent
(noncondensing)
Introduction 1–13
1.8 Related Documents
Table 1–4 Related Documentation
Item
Part Number
Optical Disk Library Conversion Kit Installation Guide
EK–OLCON–IG
Optical Library User’s Guide (Shipped with each unit)
EK–STSOP–UG
Optical Storage Desktop Software Installation Guide
AA–PXYKA–TE
Optical Storage Desktop Software User’s Guide
AA–PXYLA–TE
Optical Storage Management Software Installation Guide
AA–PXYPA–TE
Optical Storage Management Software Installation Guide
AA–PXYQA–TE
Storage Server 100 Installation Guide
EK–D59SS–IN
Small Optical Disk Library Service Manual
EK–SOL10–SV
Medium Optical Disk Library Service Manual
EK–MOL20–SV
Large Optical Disk Library Service Manual
EK–SS100–SV
Storage Server 100 Optical Disk Service Manual
EK–STSOP–SV‡
Optical Disk Library System Technical Reference Manual
5959-3559 (GSD)†
Technical Guide Optical Drives and Libraries
5960-7605†
Optical Drive and Library SCSI-2 Command Reference
5960-7606†
Offline Diagnostics for HP Optical Products
5960-7626†
†These documents can be ordered directly from Hewlett-Packard
‡Only for older model 10/20 Jukebox shipped with (Ninja) storage server systems
Table 1–5 Pass Documents
Pass
Entry Number
RW5xx Hardware Pass
7174
Ninja Hardware Pass
6060
Optical Storage Management Software Pass
3731
Optical Storage Desktop Software Pass
3750
1–14 Introduction
2
Environmental/Installation/PM
2.1 Environmental Requirements
Note
The environmental requirements listed here apply when the RW504
/RW524 optical disk library is not connected to a system. When this
device is connected to a system, the more stringent environmental
specifications listed for any single device within the system are applicable
and supersede these specifications.
2.2 Operating Temperature/Clearance Requirements
The RW504/RW524 optical disk library is designed to operate with an ambient
air temperature range of 10° to 40° C (50° to 104° F) with a rate of temperature
change not to exceed 10° C (50° F) per hour.
A minimum 70-80 mm (3 in.) is required behind the RW504/RW524 optical disk
library rear panel to allow air circulation.
2.3 Location Requirements
Position the autochanger away from sources of particulate contamination such
as frequently-used doors and walkways, stacks of supplies that collect dust, and
smoke-filled rooms.
Environmental/Installation/PM 2–1
2.4 Primary Power/External Ground
The power outlet to be used to supply AC power to the RW504/RW524 optical
disk library must be checked to ensure that the proper voltage is available for
the drive. Permitted voltage range(s), depending on configuration and assuming
50-60 Hz, are 100 to 120 Vac and 200 to 240 Vac. Also check the earth (safety)
ground in the power outlet.
2.5 Unpacking Procedure
Check that all materials are included with the disk library (Section 2.6.1). If any
items are missing, please contact the factory Order Processing Center with the
following information:
•
Original order number or unit serial number
•
Receiving address
If the unit is damaged, it will be repaired or replaced. Billing of the charges
depends on whether the damage was caused by the carrier or the factory
packaging. The cause of damage will be determined by the field service
representative.
Problems determined to be caused by factory packaging should be reported, in
detail, to the factory so a warranty claim can be submitted.
Be sure to include the product number and full serial number in any
correspondence concerning the unit.
2–2 Environmental/Installation/PM
2.6 Installation Procedures
This section provides information on:
•
Contents of shipment
•
Uncrating and installing an RW504/RW524 optical library
•
Connect multiple optical library systems together
Setting up the optical disk library is the customer’s responsibility; however this
service may be contracted for on a time-and-materials basis. Setup instructions
for the disk library are in the Optical Library User’s Guide, part number
EK–STSOP–UG, which is shipped with the product.
The installation and configuration instructions are provided for situations where
the customer has arranged for this service.
Note
Before you connect the optical disk library to the host, verify that the host
supports it. Refer to the Product Support Plan for the most current list of
host systems that support the RW504/RW524 optical disk library.
CAUTION
The shipping screw must be removed from the disk library before
connecting power. Directions for removing the shipping screw are printed
on the carton, or see Figure 2–1 for the location of the shipping screw.
2.6.1 Contents of Shipment
You should receive a crate containing the RW504/RW524 optical library, and
a box, shipped separately, labeled OPEN FIRST. Inside this box are several
additional packages containing the following:
•
READ ME FIRST instructions
•
Optical Library User’s Guide
•
SCSI cable
•
SCSI terminator
•
Power cord
Environmental/Installation/PM 2–3
In addition to these items, to complete the installation you may need two
wrenches—a 1/2 inch wrench and a 9/16 inch wrench—and a TORX T10, T15,
T20, and T25 screwdriver (the blade is star-shaped) as well as wire cutters or a
knife.
2.6.2 Uncrating the RW504/RW524 Optical Library
1. Uncrate the Optical Library. Remove the packaging material.
2. Lay the unit on its side and remove the shipping screw as shown in
Figure 2–1.
Figure 2–1 Removing the Shipping Screw
Shipping screw
location
MK445−02
2.6.3 Installing the RW504/RW524 Optical Library
The optical disk library has a single-ended SCSI interface. The total allowable
cable lengths for a single-ended SCSI is 3.9 meter.
CAUTION
Do not switch off power to any peripheral on the SCSI bus if the bus is
active. Switching off power to a peripheral on an active bus may cause
data loss, indeterminite bus states, or both.
2–4 Environmental/Installation/PM
Connecting the SCSI Cables
To connect the SCSI cables to the optical library, perform the following steps.
1. Make sure the host computer and the optical library are switched off.
2. Locate a SCSI cable.
3. Locate the single-ended SCSI terminator.
4. Is there another SCSI device connected to the host computer?
NO
a. Connect the SCSI cable to a SCSI socket on the rear of the autochanger.
Press in fully (see Figure 2–3).
b. Plug the terminator into the other SCSI socket.
c.
Connect the other end of the SCSI cable to the SCSI interface on the
computer (Figure 2–2). Press in fully.
NOTE
Before you connect the SCSI cable to the Host computer, verify the
SCSI IDs to ensure that bus address conflicts do not exist. Refer to
Section 3.3.4.
Environmental/Installation/PM 2–5
Figure 2–2 Attaching the SCSI Cable to the RW504/RW524 Optical Disk Library
MK445−06
Note
You can position the optical library anywhere along the SCSI bus.
Properly terminate the last device on the bus and do not exceed the total
SCSI cable length limitations.
YES
a. Determine which SCSI device is last on the chain of SCSI connections.
b. Check SCSI IDs first, then remove the terminator from the SCSI socket
on the last device and connect the optical library SCSI cable to that
socket. Press in fully.
c.
Connect the other end of the SCSI cable to one of the SCSI sockets on the
back of the optical library. Press in fully (see Figure 2–3).
d. Plug the terminator into the other SCSI socket on the back of the optical
library.
2–6 Environmental/Installation/PM
Connecting Power
CAUTION
Verify that the shipping screw has been removed from the disk library
before connecting power. Directions for removing the shipping screw are
printed on the carton, or see Figure 2–1 for the location of the shipping
screw.
1. Check the fuse and the voltage select switch setting (Section 2.6.4).
2. Check to make sure that the power switch (located on the rear panel) and the
operation switch (located on the front panel) are switched off.
3. Locate the power cord.
4. Plug the power cord into the AC line connector located on the rear panel.(See
Figure 2–3)
Environmental/Installation/PM 2–7
Figure 2–3 Rear Panel
3 Power Switch
4 Voltage Select Switch
1 Power Connector
2 SCSI Connector
MK445−05
5. Plug the power cord into the power outlet.
6. Press the power switch (located on the back panel) and the operation switch
(located on the front panel) so they are in the ON position.
Initially, the control panel displays TESTING. Once the power-on test
completes, the control panel displays READY.
7. If necessary, set SCSI IDs to values for your configuration (Section 3.3.4).
Note
A sequence of tests that are run when the disk library is first switched on.
The READY status on the control panel indicates that the unit is in sound
condition. If a TEST FAIL status appears on the control panel display, refer
to Chapter 4, Troubleshooting and Diagnostics for information on how to
resolve the problem.
2–8 Environmental/Installation/PM
Note
If you want to move the optical library, see Chapter 3.
2.6.4 Checking the Fuse and Voltage Setting
The RW504/RW524 optical disk library should come from the factory configured
according to the area designated as the final destination on the order form. Verify
that the drive was configured correctly.
CAUTION
Do not switch off power to any peripheral on the SCSI bus without first
checking that the bus is inactive.
Switching off power to a peripheral on an active bus may cause data loss,
indeterminite bus states, or both.
1. Remove power from the autochanger.
a. Press the operation switch (located on the front panel) so that it is in the
‘‘OFF’’ position.
b. Press the power switch (located on the rear panel) so that it is in the
‘‘OFF’’ position.
c.
Disconnect the power cable.
2. Verify that the correct fuse is in the fuseholder cap. Refer to Figure 2–3 for
the location of the AC line fuse and Table 2–1 to identify the correct fuse.
Table 2–1 Fuse Specifications and Part Numbers
Operation
Fuse
HP Part Number
120 volt (115 VAC nom.)
3 A 250 V
2110-0003
220 volt (230 VAC nom.)
3 A 250 V
2110-0780
Environmental/Installation/PM 2–9
2.6.4.1 Changing the Voltage Configuration
CAUTION
Do not switch off power to any peripheral on the SCSI bus without first
checking that the bus is inactive.
Switching off power to a peripheral on an active bus may cause data loss,
indeterminite bus states, or both.
1. Remove power from the autochanger.
a. Press the operation switch (located on the front panel) so that it is in the
‘‘OFF’’ position.
b. Press the power switch (located on the rear panel) so that it is in the
‘‘OFF’’ position.
c.
Disconnect the power cable.
2. Set the voltage select switch to the correct setting.
a. Locate the voltage select switch on the rear panel of the autochanger.
b. If the voltage switch setting is incorrect, change it by sliding the voltage
select switch sideways using a flat-blade screwdriver.
2.6.5 Connecting an Uninterruptible Power Supply (UPS)
To fully protect against data loss in the event of a power failure, Digital
recommends the use of an uninterruptable power supply (UPS). The UPS
can be connected directly to the disk library or it can be a central UPS used by
the entire computer system.
If a power failure occurs during a write operation, the UPS will continue to
supply power to the auto changer/computer system until the data in the optical
drive’s buffer can be written to an optical disk.
For the best protection, the customer should choose the type of UPS that provides
a communication link between the UPS and the autochanger/computer system.
With this type of connection, the computer system/autochanger senses when
power is being supplied by the UPS. Any data currently in the buffer is written
to the disk, and no additional commands are accepted until regular power is
restored.
2–10 Environmental/Installation/PM
Note
If the customer’s UPS does not provide a communication link between the
UPS and the autochanger/computer system, someone will have to shut
down the computer system before the UPS battery power is drained or
data in the buffer may be lost.
If the UPS is connected to the RW504/RW524 optical disk library, the power
requirements shown in Table 2–2 must be met:
Table 2–2 UPS Power Requirements
Volt-Amps
Watts
125 Volt-Amps (typical)
75 Watts (typical)
180 Volt-Amps (maximum)
110 Watts (maximum)
CAUTION
Connecting the UPS to the autochanger incorrectly may not provide full
protection against data loss. To insure proper UPS connection, perform
the following steps:
•
Use the proper cable when connecting a UPS to the autochanger.
•
Run test 75 after connecting the UPS to the autochanger. (See
Section 4.9.2 for instructions for running test 75.)
2.7 Hardware Verification
The Customer Engineer (CE) needs to verify that the optical disk library is
fully functional. To do this, the CE powers up the unit, which will invoke the
poweron diagnostic. After completion of the poweron diagnostic, the CE needs
to execute internal diagnostic tests 2, and 11 through 17 (Section 4.10) and test
the autochanger mechanism and drive(s) to verify that all functions of the optical
library unit (moves, flips, reads, writes, and so forth) are operating correctly.
Refer to the appropriate Setup Guide and host configuration guide to complete
the installation.
Environmental/Installation/PM 2–11
2.8 Moving the RW504/RW524 Optical Disk Library
2.8.1 Moving a Short Distance
To move an RW504/RW524 optical disk library a short distance (down the hallway
or to another floor in the building) perform the following steps. If you want to
ship the disk library, see Section 2.8.2.
1. Unmount (unreserve) any disk surfaces from the host system if necessary.
2. If there is a disk loaded into the drive mechanism, eject the disk from the
drive and return it to its storage slot.
CAUTION
Failure to eject a disk from the optical drive prior to transport could
result in damage to the drive mechanism.
Do not switch off the optical disk library or unplug the AC power cord
until you are sure that the SCSI bus is inactive. Switching off power or
unplugging the power cord when the SCSI bus is active can cause data
loss, indeterminate bus states, or both. (Check the host system reference
manuals for information on checking the status of the SCSI bus.)
Note
Before you move an optical disk library to a new location, make sure that
all environmental requirements listed in Chapter 2 have been met and
that the power outlet has been checked to ensure that the proper voltage
is available for the drive.
3. Switch off the power switch (located on the back panel) and the operation
switch (located on the front panel).
4. Remove the power cord and SCSI cable connections from the disk library.
5. Carefully move the disk library to its new destination.
6. Connect the disk library to the host.
7. Reconnect the power cord.
8. Configure the disk library to the host. (Refer to your host system manual for
configuration information.)
2–12 Environmental/Installation/PM
2.8.2 Shipping the RW504/RW524 Optical Disk Library
If the disk library must be shipped, do the following steps.
1. Unmount (unreserve) any disk surfaces from the host system if necessary.
2. Eject all disks from the autochanger and, if the disks were not labeled with a
storage slot location prior to inserting them into the autochanger, do it now.
CAUTION
Failure to eject all disks from the optical drive and storage slots prior
to transport could result in damage to the drive mechanism, the
autochanger, or both.
3. Run TEST 23 to position the picker for shipping.
a. Press
NEXT
until TEST * appears, and then press
b. Press
NEXT
until TEST 23 appears, and then press
ENTER
.
ENTER
.
CAUTION
Do not switch off power or unplug the AC power cord from the optical
disk library until you are sure that the SCSI bus is inactive. Switching
off the library or unplugging the power cord when the SCSI bus is active
can cause data loss, indeterminate bus states, or both. (Check the host
system reference manuals for information on checking the status of the
SCSI bus.)
4. Press the operation button (located on the optical disk library front panel) and
the power switch (located on the back panel) so they are both in the ‘‘OFF’’
position.
5. Remove the power cable and SCSI cable connections from the optical disk
library.
6. Lay the disk library on its side and replace the shipping screw (See
Figure 2–4).
Environmental/Installation/PM 2–13
Note
If the shipping screw has been misplaced, you can use a cap screw with
the following specifications:
•
6/32 UNC-2B screw
•
1-3/8 inches long
7. Repackage the autochanger in its original shipping carton and have the unit
shipped in the same manner in which it was received.
Figure 2–4 Replacing the Shipping Screw
Shipping screw
location
MK445−02
2–14 Environmental/Installation/PM
2.9 Preventative Maintenance
There is no preventive maintenance for the optical disk library, however the
optical disks may require cleaning.
Cleaning an optical disk is needed more commonly on standalone drives than
with autochangers because of the differences in their environments and usage.
Although an autochanger may be used in such a way as to make disk cleaning
necessary, it is not recommended.
To determine whether or not disk cleaning is appropriate for your customer’s
situation, refer to Section 4.3, Optical Disk Cleaning.
CAUTION
Do not attempt to clean the optical drive objective lens! Although disk
drive cleaning kits are available, they are not approved for use with the
RW504/RW524 and will damage the optical drive mechanism.
Environmental/Installation/PM 2–15
3
Product Operation and Configuration
3.1 Front Panel/Control Panel Operations
Refer to Figure 3–1 for the location of the front panel controls and features.
Table 3–1 lists and describes the callouts.
Figure 3–1 Front Panel
1 Mailslot
5 9−Character Display
2 Operation Switch
3 Selection Controls
4 Drive Indicator
MK445−03
Product Operation and Configuration 3–1
Table 3–1 Front Panel Controls
!
"
Mailslot
Allows you to insert or remove optical disks.
Operation Switch
#
Applies or removes power to enable or disable
operation of the optical disk library. (This is NOT
the power switch. The power switch is located on the
rear panel.)
Selection Controls
Press these buttons to perform the desired operation.
CANCEL is pressed to cancel the current operation
or choice.
NEXT is pressed to display the current operation
options available such as LOAD, TEST, INFOrmation,
CONFiguration, EJECT, and SCSI ID, or to scroll the
displayed choice forward by one.
PREV is pressed to scroll the displayed choice
backward by one.
$
%
ENTER is pressed to choose the displayed selection.
Drive Indicator
Lit when a read, write, erase, or seek operation is
done. It is also lit during power-on self-test.
9-Character Display
Displays information about the current operation.
Generally you press PREV or NEXT to control the
selections. Once your selection is displayed, you press
ENTER . You may press CANCEL to cancel your
selection.
3–2 Product Operation and Configuration
3.2 Rear Panel Features and Controls
Refer to Figure 3–2 for the location of the rear panel controls and features.
Table 3–2 lists and describes each control.
Figure 3–2 Rear Panel
3 Power Switch
4 Voltage Select Switch
1 Power Connector
2 SCSI Connector
MK445−05
Table 3–2 Rear Panel Features and Controls
!
"
Power connector
Connection for power cord.
SCSI connectors
Two SCSI bus format connectors that allow SCSI
devices to be daisy-chained. If no other SCSI
device exists after the current device on the chain,
a terminator must be connected to the unused
connector.
(continued on next page)
Product Operation and Configuration 3–3
Table 3–2 (Cont.) Rear Panel Features and Controls
#
Power switch
$
Used to switch on or off all power to the optical disk
library. (This switch must be on before the operation
switch on the front panel is functional.)
Voltage select switch
The voltage select switch allows the user to specify
either a 115-volt or a 230-volt setting depending on
the country in which the disk library will be used.
UPS (9-pin, serial)
Connector
Used to connect a communication cable between the
optical disk library and an uninterruptable power
supply (UPS). A UPS insures that data in the buffer
during a write operation will not be lost in the event
of a power failure.
Fuse receptacle
The fuse receptacle holds the fuse and fuseholder cap.
3–4 Product Operation and Configuration
3.3 Setting and Displaying Configurations
3.3.1 Setting a Configuration (CONF)
Follow these steps if you wish to set an autochanger configuration.
1. With READY displayed, press
2. Press
ENTER
NEXT
until CONF * displays.
. CONF 0 displays. (The 0 is blinking.)
3. Press NEXT or PREV until CONF ## displays (where ‘‘##’’ is the configuration
number you want to change.)
Refer to Table 3–3 for a complete listing of configurations.
4. Press
ENTER
.
Some configurations require a security code. If prompted, enter the security
code. (NO CONFIG displays if you entered the wrong code.)
5. Press
NEXT
6. Press
ENTER
or
PREV
until the value you want appears in the display.
once your choice displays. SET displays briefly followed by
CONF *.
7. Press
CANCEL
twice to return to READY.
3.3.2 Displaying Information Logs (INFO)
1. With READY displayed, press
2. Press
ENTER
3. Press
NEXT
NEXT
until INFO * displays.
.
or
PREV
until the desired log number displays.
Refer to Section 4.6 for a complete listing of information logs.
4. Press
ENTER
. The log information displays.
Note
Some logs will display more information when
Press
CANCEL
to stop the INFO display. Press
NEXT
NEXT
or
PREV
is pressed.
to choose another log.
Product Operation and Configuration 3–5
3.3.3 Choosing Tests and Displaying Results (TEST)
Note
A complete listing of diagnostic tests is given in Section 4.9 and
Section 4.10.
With READY displayed, press
1. Press
ENTER
2. Press
NEXT
NEXT .
TEST * displays.
. TEST 0 displays.
or
PREV
3. When you press
until the needed test number displays.
ENTER
for the chosen test, ONCE displays.
You may accept ONCE by pressing ENTER or press NEXT or PREV to choose 10,
100, 1000, or LOOP test repetition times.
LOOP indicates that the test runs continuously until CANCEL is pressed or the
unit is switched off.
Note
All tests except test 39 may be stopped by pressing CANCEL . The current
test iteration completes. To stop test 39, press CANCEL twice.
4. Once you press ENTER for the number of test iterations, RUN ## displays
(where ## is the test number).
5. The test runs. If no problems are encountered, the message PASS ## displays.
You may press CANCEL to get back to the READY state; or, you may press
ENTER to perform another test.
6. If a problem occurs during the test, the message FAIL ## displays. Press
ENTER to gain information about the failure. An ERROR ## displays. Relevant
information is stored in the Autochanger Error Log (Log 0).
Press
CANCEL
to exit this display.
3–6 Product Operation and Configuration
3.3.4 Setting the SCSI Address
Note
Determine what SCSI device addresses are currently in use on the host
system. You can then correctly determine what available SCSI addresses
to use for the optical drive mechanism and the autochanger controller.
The default address settings are as follows:
•
Autochanger controller - SCSI ID 3
•
Optical drive mechanism - SCSI ID 4
If you want to change either address, follow these steps.
Note
Pressing CANCEL at any time will return you to the READY state or will
take you back one step each time it is pressed.
1. With READY displayed, press
2. Press
ENTER
NEXT
until SCSI ID * displays.
. AC ID 3 displays.
This is the autochanger controller address. If you want to change this
address, press ENTER , otherwise press NEXT to display DRV ID 4 and then
press ENTER .
3. Press
NEXT
or
4. Press
ENTER
5. Press
NEXT
PREV
until the address you want is displayed.
. The address you chose is now set.
until either UPDATE or CONFLICT displays.
If CONFLICT displays, the drive and controller have been set to the same
address and one of them must be reset.
If UPDATE displays and you are satisfied with the addresses you have selected,
press ENTER ]].
6. Record the new address setting(s) for future reference.
Product Operation and Configuration 3–7
3.3.5 Securing the Optical Disk Library
In its default condition, the optical disk library is unsecured. Any user can insert
or remove disks or access control panel displays, configurations, or tests. In an
open environment, some precautions should be taken to secure access to the
control panel as well as to the following:
•
Sensitive data stored on optical disk surfaces
•
Configuration settings
•
Diagnostic log information
If the customer is concerned about security, the following procedures might be
considered:
•
Setting a new disk library security code periodically and limiting the number
of people who know the security code
•
Implementing security configurations 15 and 20 which restrict disk insertion
and removal. This is also done through OSMS software
•
Locating the disk library in a physically secure environment
3.3.6 Setting a New Security Code
Note
This procedure is explained in the Optical Library User’s Guide
(EK–STSOP–UG). It is presented here as information to service personnel
in case the customer prefers this level of guidance while setting up the
disk library.
Note
A security code of 0-0-0 was set at the factory. Digital recommends that
the customer change the security code so that only authorized persons
can access the optical disk library. Otherwise, anyone can insert and eject
disks, and change operation settings on the optical disk library.
When setting a new security code, the old code (or default code, 0-0-0, if
none has been set) must be keyed in first and then key in the new code.
The customer should key in both the old security code and the new code
during this procedure.
3–8 Product Operation and Configuration
1. With READY displayed, press
2. Press
ENTER
3. Press
NEXT
NEXT
until CONF * displays.
. CONF 0 appears in the display window (0 is flashing).
until CONF 17 is displayed.
You are now prompted to enter the old or default security code.
4. Press
ENTER
. CODE1 and a flashing 0 is displayed.
5. Press NEXT until the first number of the old or default (0) security code is
displayed.
6. Press
ENTER
. CODE2 and a flashing 0 is displayed.
7. Press NEXT until the second number of the old or default (0) security code is
displayed.
8. Press
ENTER
. CODE3 and a flashing 0 is displayed.
9. Press NEXT until the third number of the old or default (0) security code is
displayed.
10. Press
ENTER
. SET is displayed if you entered the old number correctly.
NO CONFIG is displayed briefly and then CONF 17 is displayed if a mistake was
made in keying in the old security code. Follow steps 4 through 9 again.
Note
It is a good idea for the customer to write down the new security code
prior to entering it into the disk library.
Follow these steps to enter the new security code:
1. Press
ENTER
2. Press
NEXT
3. Press
ENTER
4. Press
NEXT
5. Press
ENTER
6. Press
NEXT
7. Press
ENTER
. NEW1 and a flashing 0 is displayed.
to choose the first number of the new security code.
. NEW2 and a flashing 0 is displayed.
to choose the second number of the new security code.
. NEW3 and a flashing 0 is displayed.
to choose the third number of the new security code.
. SET 17 is displayed.
Product Operation and Configuration 3–9
3.3.7 Restricting Disk Insertion and Removal
Configurations 15 and 20 act together to control disks during normal and power
fail conditions.
•
CONF 15 - when this is set to ON, you cannot insert or remove disks without a
security code.
•
CONF 20 - when this is set to ON, the CONF 15 status is maintained when
a power fail occurs. Also, the reserved status on mounted surfaces is
maintained if the autochanger power fails.
When setting CONF 15 or CONF 20, the display prompts you for a security code.
This security code is 0-0-0 (default) or the one set by the customer using CONF 17.
3.3.7.1 Setting CONF 15 or CONF 20
1. Press
NEXT
until CONF * displays, and then press
2. Press
NEXT
or
3. Press
ENTER
4. Press
NEXT
5. Press
ENTER
6. Press
NEXT
7. Press
ENTER
8. Press
NEXT
9. Press
ENTER
10. Press
NEXT
11. Press
ENTER
PREV
ENTER
.
until CONF 15 or CONF 20 displays.
. CODE1 and a flashing 0 displays.
or
PREV
until the first security code number displays.
. CODE2 and a flashing 0 displays.
or
PREV
until the second security code number displays.
. CODE3 and a flashing 0 displays.
or
PREV
until the third security code number displays.
PREV
to select ON or OFF.
.
or
. SET 15 or SET 20 displays.
3–10 Product Operation and Configuration
3.3.8 Controlling Mailslot Rotation
Configurations 31 and 32 allow control of mailslot rotation as described below.
(See Section 3.3.1)
Note
In its default state, the optical disk library’s mailslot stays open, ready to
accept an optical disk.
The following configurations allow control over the mailslot’s position.
•
CONF 31 - when this is set to ON and CONF 15 is also set to ON, the mailslot’s
default position is closed. The mailslot cannot be opened and disks cannot
be inserted or removed until CONF 15, (requires a security code to set), is set
to OFF. Setting this configuration to ON makes it visible to the user that the
mailslot cannot be used until security configuration 15 is switched OFF.
If the autochanger is full, the mailslot will only open for an eject command.
•
CONF 32 - when this is set to ON, the mailslot can be rotated open or closed
from the control panel or it allows the host to control mailslot rotation using
a SCSI Rotate Mailslot command. Pressing NEXT on the disk library’s control
panel displays an OPEN MS or CLOSE MS message. When the open or close
message displays, press ENTER to toggle the mailslot open or closed.
If the autochanger is full, the OPEN/CLOSE MS is not displayed and the mailslot
will only open for an eject command.
3.3.9 Host Configuration
Once the disk library is connected to the host system and the device address is
set, you are ready to prepare the host system to access the library. To determine
if the host you are connecting to supports the optical disk library and for further
installation information, check the following documents:
•
Product support plan (available from your local Sales Support Office)
•
Host system documentation.
Product Operation and Configuration 3–11
3.4 Autochanger Configuration Choices
The following table lists the available configurations choices. An explanation of
how to access and set these configurations is found in ‘‘Setting a Configuration’’
in Section 3.3.1.
Table 3–3 Autochanger Configuration Choices
No.
Function
Default
Options
0
Clear/Save Error Log
(Information Log 0)
Save
Clear - clears the error log
immediately.
Save - saves the error log until
Clear is con figured.
8
No Break on Failure
Off
Off - if a test encounters a failure,
the test stops.
On - if a test encounters a failure,
the test continues.
10
Clear/Save Move Log
(Information Log 10)
Save
Clear - clears the move log
immediately.
Save - saves the move log until
Clear is configured.
11
Clear/Save Runtime Log
(Information Log 11)
Save
Clear - clears the runtime log
immediately.
Save - saves the runtime log until
clear is configured.
Configurations 15 - 20 require
a security code.
15
Prevent Media Removal
(security code required)
Off
On = No mailslot I/O
Off = Normal mailslot I/O
16
Set Default Configurations
(security code required)
Save
Clear - restores default configurations immediately.
Save - maintains all set configurations.
17
Set New Security Code
(security code required)
0-0-0
18
Clear/Save Logs
(security code required)
Save
Clear - clears/zeros the specified
logs.
(continued on next page)
3–12 Product Operation and Configuration
Table 3–3 (Cont.) Autochanger Configuration Choices
No.
Function
Default
Clears/zeros these logs:
Save - maintains the specified logs
until clear is configured.
#4 - Drive Load Count
#5 - Poweron Hours
#9 - Move
#12 - Flip
#14 - Mailslot Rotation
19
Set Autochanger Retries
A - Max. attempts to find home
B - Max. attempts to do move
C - Max. attempts to restore
move after failure.
Options
Sets the number of attempts to
retry moves before giving up.
4
2
1
20
Poweron Cartridge Security
(security code required)
Off
On - maintains the status of
configuration 15 upon power cycle
or power failure.
Off - Configuration 15 is not
maintained through a power cycle
or power failure.
21
Enable Autochanger Retries
On
On - Autochanger attempts to
correct itself when it encounters
difficulty.
Off - Autochanger does not attempt
to correct itself when it encounters
difficulty.
22
Clear Drive 1 Load Count Log
(Information Log 4)
Save
Clear - clears the Drive 1 Load
Count Log immediately.
Save - saves the Drive 1 Load
Count Log until clear is configured.
27
Report Recovered Error
Off
On - reports the SCSI-level error to
the host.
Off - no reports of SCSI-level errors
to the host.
(continued on next page)
Product Operation and Configuration 3–13
Table 3–3 (Cont.) Autochanger Configuration Choices
No.
Function
Default
Options
31
Secured Mailslot Rotation
(security code required)
Off
Off - Normal mailslot operation.
On - The mailslot rotates in when
configuration 15 is set to ON or a
Prevent Media Removal command
is received. The mailslot remains
closed until configuration 15 is
set to OFF or an Allow Media
Removal command is received.
If the autochanger is full, the
mailslot will open only for an
EJECT command.
32
Mailslot Rotation Command
(security code required)
Off
Off - Normal mailslot operation. If
the host sends a Rotate mailslot
command and config. 32 is set to
off, the host will receive a Check
Condition followed by a Sense Key
of Illegal Request.
On - When a Rotate Mailslot
command is received (either from
the host or via the control panel),
the mailslot is toggled open or
closed.
40
DEC/OEM Mode
Off
Off - Changes inquiry mode to DEC
mode. Required when connected
to a DEC computer to ensure
integrity. This changes default of
Autocontroller PCA.
ON - For use with OEM computers
(HP).
41
DEC/OEM Mode
Off
Off - Changes inquiry mode to DEC
mode. Required when connected to
a DEC computer to ensure integrity.
This changes default of 1.3 Gbyte
multifunction drive only.
ON - For use with OEM computers
(HP).
(continued on next page)
3–14 Product Operation and Configuration
Table 3–3 (Cont.) Autochanger Configuration Choices
No.
Function
Default
Options
66
Zero all RAM
Save
Save - RAM remains unchanged.
Clear - Zeros all RAM locations and
reboots.
Caution - When this configuration
is set to ’’Clear,’’ the product ID
and the vendor ID are cleared. DO
NOT perform this configuration
operation.
Product Operation and Configuration 3–15
4
Troubleshooting and Diagnostics
This chapter is divided into the following sections:
•
Operation/Installation Error Information
Lists common problems encountered during operation and installation of
the optical disk library, and gives suggestions for solving these problems.
(top-level troubleshooting)
•
Control Panel Error Information
Provides error messages and log information which are available through
the control panel display. This level of troubleshooting is used when ‘‘hard’’
(repeatable) errors are encountered. (intermediate-level troubleshooting)
•
Error Information through SCSI Commands
Error messages and log information available by issuing SCSI commands
via an external PC-based host computer. This level of troubleshooting is
used when ‘‘soft’’ (intermittent) errors are encountered. (in-depth level
troubleshooting)
•
Internal Diagnostic Utilities
Information about the available internal diagnostics used to aid in the
troubleshooting process.
Troubleshooting and Diagnostics 4–1
4.1 Operation/Installation Error Information
Table 4–1 lists problems that may occur during operation of the optical disk
library. If you cannot find a solution to a problem in this section, go to Section 4.5
for more in-depth troubleshooting.
CAUTION
DO NOT CYCLE POWER during any troubleshooting until you are sure
the system SCSI bus is INACTIVE and will REMAIN INACTIVE.
Removing power while the bus is active can cause data loss and/or
indeterminate bus states. Check the host system reference manuals for
information on checking the status of the SCSI bus.
Table 4–1 Operation/Installation Troubleshooting
Task
Problem/Symptom
What to do
Communicating
host to library
Can’t get the host to
recognize the optical
disk library.
Check to make sure the disk library is
supported on the host operating system.
Check to make sure the autochanger was
installed and configured as described in
the user’s guide and the appropriate host
system manuals.
Check the SCSI connections.
Check the SCSI interface address as it
relates to the device files.
Make sure SCSI IDs of Jukebox and MF
drives do not conflict with other SCSI
devices on the bus. Section 3.3.4
Make sure software license was correctly
installed.
Make sure CONFIG 40 is set to DEC mode.
Reference Section 3.3 and Table 3–3
(continued on next page)
4–2 Troubleshooting and Diagnostics
Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task
Problem/Symptom
What to do
Changing the
drive address
Changed drive address
but new address is not
recognized.
After changing an address, the autochanger
power and/or the host system power may
need to be cycled for the new address to
be recognized. (Refer to the host system
documentation for information on setting
peripheral addresses and shutting down
the host system.)
Inputting
Security Code
Security code forgotten
or misplaced for the
autochanger.
First, try the default security code (0-00). If the security code is not set to the
default, locate the 8-switch dip switch
on the controller PCA (See Figure 5–3),
and set switch 1 to the ‘‘closed’’ position.
Switch on the autochanger. This clears
NVRAM and sets the security code to the
default code. NOTE: Once this has been
done, the switches must be reset to their
original settings in order for NVRAM to
be maintained the next time power is
switched off. The customer may now use
configuration 17 to set a new security code.
(See Section 3.3.6)
Loading Disks
Disk inserted in
mailslot, but the display
reads ERROR, EMPTY, or
MISLOAD.
Remove the disk from the mailslot and
try inserting it again. Push the disk in,
shutter-end first, so that the disk is flush
with the optical disk library front panel.
Powering on
The optical disk library
won’t power on.
Check to make sure the power cord
connections are tight.
Check to see that both the back power
switch and the front operation switch are
in the ON position.
Check to make sure the power outlet is
operating.
Check the voltage select switch setting.
Replace the fuse with a new one.
Replace the power cord with a known good
one.
Replace the power supply module.
(continued on next page)
Troubleshooting and Diagnostics 4–3
Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task
Power fail
Problem/Symptom
What to do
Power-on self-test fails.
Turn the unit off, then turn it on again.
Observe the power-on test result. If the
unit continues to fail, use the error code
to begin troubleshooting. (See Section 4.2
following this table.)
Does not boot correctly.
Make sure the boot disk is ON, spun up,
and ready before applying power to the host
computer. The autochanger and the host
may then be powered on in any order.
Just the autochanger
power fails.
When power returns, unmount and
remount all disk surfaces. Do not eject
any disks until the surfaces are unmounted
/unreserved.
Autochanger power fails
while a disk is in the
drive.
If you need to remove the disk before power
can be resupplied to the drive, the eject tool
can be used to recover the disk. See
Section 4.4 for instructions for using the
eject tool.
Host computer
power fails and the
autochanger stays on.
After the host reboots, file system check
any write-mounted surfaces.
Both the host system
and autochanger power
fail.
After the host reboots, file system check
any write-mounted surfaces.
CAUTION
Do not eject disks from the autochanger until all
mounted surfaces are unmounted.
To prevent disks from being removed after a power
failure, set configuration 20 (Power-on Cartridge
Security) to ‘‘ON.’’ See Section 3.3.7 and Section 3.3.1
for an explanation of configuration 20 and how it is set.
(continued on next page)
4–4 Troubleshooting and Diagnostics
Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task
Problem/Symptom
What to do
Reading the
Front Panel
Display Window
No display messages
appear.
Make sure both the power switch (on the
rear panel) and the operation switch (on
the front panel) are switched on.
Check that the power cord is connected.
Check AC input.
Check the fuse.
Check the control panel cable connections.
Replace the control panel PCA.
Replace the autochanger controller PCA.
Replace the power supply.
Reading/writing
magneto-optical
disks
Can’t write to the disk.
Check the file system access permissions.
Check the write-protect tab on each disk
side to assure write-enabled status.
Check to make sure the disk was
initialized.
Check that the disk file system was
mounted correctly.
Check your application software.
Removing disks
Disk removal attempted,
but the storage slot
or drive location won’t
display the option.
Make sure the optical disk surface’s file
systems have been unmounted.
Disk removal attempted,
but a FULL or MISLOAD
message displays.
Remove the disk from the mailslot and try
to remove the desired disk again.
(continued on next page)
Troubleshooting and Diagnostics 4–5
Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task
Problem/Symptom
What to do
The unit’s power failed
while a disk was in the
drive.
Try powering on the unit. If successful, use
the file system check command.
If power-on is unsuccessful, power the unit
off. Do not move the unit. Moving the unit
with a disk in the drive risks damaging
the magneto-optical mechanism in the MO
drive. Refer to the ‘‘Powering On’’ and
‘‘Power Fail’’ sections earlier in this table.
If it is critical that the disk be removed
from the drive before power can be restored
to the drive, see Section 4.4.
4.2 Power-on Self-tests
CAUTION
When the optical disk library is powered on and the self-test is run,
the SCSI interface and the terminator must both be either connected or
disconnected.
If the controller senses that the optical drive is not connected to a host
system via the SCSI interface, additional self-tests are run on the SCSI
circuitry. If these tests run while a terminator is attached, voltage levels
at the SCSI bus connector are different than expected and a self-test
failure results.
CAUTION
Do not switch off any peripheral on the SCSI bus without first checking
that the bus is not active.
Switching off can cause data loss and/or indeterminate bus states.
To run the power-on self-test, do the following steps:
1. Insert a formatted disk into the drive either from a storage slot location or
through the mailslot/control panel.
2. Remove power from the optical disk library. Press both the power switch on
the back panel and the operation switch on the front panel.
4–6 Troubleshooting and Diagnostics
3. Remove the disk library top cover.
a. Remove the four T-20 screws on the back cover.
b. Slide the top cover towards the back of the unit to free the four tabs from
the sides of the autochanger chassis, and then pull the sides of the top
cover out slightly while lifting the cover off.
4. Remove the right side panel. (This will allow you to observe the LEDs on the
front of the optical drive mechanism.)
a. Remove the four T-15 screws at the back end of the side panel.
b. Slide the panel towards the back of the autochanger until the panel can
be lifted off.
5. Switch on both the rear panel power switch and the front panel operation
switch, and wait for the power-on self-test to complete.
If the power-on self-test completes successfully, both LEDs will turn off. If
power-on self-test fails, the fault LED will remain lit.
4.3 Optical Disk Cleaning
Note
Cleaning an optical disk is needed more commonly on standalone drives
than with autochangers because of the differences in their environments
and usage. While the following information is therefore more applicable
to standalone drives, an autochanger may be used in such a way as to
make the following cleaning information apply. Disk cleaning for libraries
in general, however, is NOT RECOMMENDED as a normal user task.
Disk cleaning should only be done after a read/write failure or if a customer
notices a loss of autochanger performance. In addition, it must be determined
that the failure or loss of performance was not caused by a definite hardware
failure.
A failure to read a disk may result from:
•
Hardware failure
•
Contamination of the disk surface
Troubleshooting and Diagnostics 4–7
•
Contamination of the drive objective lens
On an otherwise working drive, check to see that the most current firmware code
level is being used and/or that all applicable service notes have been done. If so,
contamination could be a cause and cleaning may be necessary.
In the case of a read failure, cleaning might be the only way to get the customer’s
data back. In the case of performance loss, a few minutes spent cleaning may
prevent unnecessary replacement of service parts and present an opportunity to
‘‘fix the site’’ and help the customer prevent contamination in the future.
The following are recommendations for preventing contamination of disks and the
disk drive:
•
Place the library away from high traffic areas.
•
Do not leave a disk in the drive for extended periods of time if possible.
•
Do not use the library in ‘‘dirty’’ environments such as coal mines, railroad
maintenance yards, etc.
4.3.1 Cleaning Tools Available
Disks may be cleaned with the Optical Disk Cleaning Kit (see Appendix B for
ordering information). This kit contains swabs and alcohol, cleaning instructions,
and a special cartridge holder that keeps the sliding sleeve open.
Note
If the problem appeared as loss of performance and cleaning a disk solved
the problem, another couple of steps must be done to regain performance
using that disk.
As performance was declining because of read/write problems, the disk
was probably becoming fragmented through excessive ‘‘sparing.’’ To regain
performance, the data on each side of the disk should be stored, each side
of the disk reformatted, and the data restored back on the disk.
CAUTION
Do not attempt to clean the optical drive objective lens!
Although disk drive cleaning kits are available, they cannot be used with
RW504/RW524. Damage to the optical drive mechanism could result if
unapproved cleaning kits are used.
4–8 Troubleshooting and Diagnostics
4.4 Using the Eject Tool to Remove a Disk from the
Drive
The optical drive mechanism does not automatically eject a disk from the drive if
a power failure occurs. If you need to manually remove a disk from a drive with
no power, you must use the eject tool.
If you do not have an eject tool for the RW504/RW524 optical drive, you may
order one of these (refer to Appendix B for ordering information). You may also
use a small flat-head screwdriver with the following dimensions:
Length
50 mm
Width
2.45 mm
Thickness
.5 mm
A disk can be removed from the drive while the drive is still secured in the
autochanger. Follow the service access procedures in Chapter 5 to access the
front of the drive mechanism, and then perform the following steps to remove a
disk from the drive:
1. Disconnect all power to the drive if you have not done so already.
2. Insert the eject tool into the small round hole in the front panel of the drive.
3. Turn the eject tool in a clockwise direction (approximately 20 complete
rotations) until the disk is ejected through the front of the drive.
CAUTION
Do not reach into the drive to get the disk. Wait until the disk is ejected
through the front of the drive before removing it. Premature removal of
the disk could damage the drive.
Troubleshooting and Diagnostics 4–9
4.5 Troubleshooting Using the Control Panel and
Observation
When there are errors in autochanger movements, two main approaches are
available to get information and to run execiser tests. The approach usually
depends on whether the error encountered was a hard error or whether it was a
soft (intermittent) error.
•
Troubleshooting Using the Control Panel and Observation - This method is
usually used in situations where you have a hard error.
•
Troubleshooting Through the SCSI Bus - This method is used in situations
where you have a soft (intermittent) error.
Error information and logs accessed through the control panel are summarized.
By knowing how the autochanger operates and using the summarized information
from the control panel display, there is enough information to troubleshoot many
problems that result in a hard error.
Figure 4–1 Information and Tests Through the Control Panel
4–10 Troubleshooting and Diagnostics
4.5.1 The Autochanger Lists the First ‘‘Possibles’’
At power-on, and after every failed move, the autochanger automatically runs
an initialization sequence that comprehensively tests the autochanger. If a hard
failure occurs, a list of possible FRUs that may have been at fault is returned.
Keep in mind that these FRUs are not listed in any prioritized manner. You
should visually inspect to determine the most likely candidate.
Figure 4–2 The Autochanger Returns Suspect FRUs
Note
This test sequence returns possible failed FRUs only if there has been
a HARD FAILURE. The test sequence will NOT find an intermittent
failure. This test sequence, called the ‘‘FRU Isolation Test’’ (test 60), can
also be run from the control panel. Similar to its automatic operation,
this test sequence only points out (‘‘isolates’’) FRUs if there has been a
hard failure.
What the Autochanger Assumes –
The FRU Isolation Test assumes the following:
•
There was a failure.
•
The cause of the failure was physical (either mechanical or in the electronics).
Troubleshooting and Diagnostics 4–11
•
There is only one failed component. Simultaneous failures of unrelated items
are not considered possible for purposes of this test.
•
Service will be done, if necessary, if a problem is found (i.e., the unit does not
have to be left in a ‘‘clean’’ state).
The test takes advantage of this and does whatever is necessary to determine
the cause of the failure. Disks are not intentionally rearranged, but if the
picker starts this test with a disk in it, the position and orientation of that
disk is unknown.
When an error occurs, the cause may be the power supply, cables, drive
electronics, motors, encoders, belts, gears, sensors, or picker. No assumption
is made about the integrity of any of these components. To isolate the actual
cause of the failure, a process of elimination is used.
The components are tested in a sequence that starts with the most basic functions
and builds to the more complex, and interrelating components (i.e., the motors
cannot be tested if the power supply is dead).
Whenever the initialization sequence is run, FIND HOME is attempted. If the
‘‘home’’ position cannot be found, the FRU isolation test is run automatically.
When the FRU isolation test is run from the control panel, the FIND HOME
sequence is run.
4.5.2 How to Use the Results of the Internal Tests
Similar to treating symptoms rather than the real problem, the suspect FRUs
given by the FRU isolation test may actually mask the root cause of the problem.
The hard move error that caused the autochanger to run the FRU isolation test
may have only been a PRODUCT of the actual problem. Blindly and repeatedly
replacing the suspect FRU(s) will not solve the problem.
4–12 Troubleshooting and Diagnostics
Figure 4–3 How Service Views the Suspect FRUs
If you consider the suspect FRU as a POINTER to the problem area rather than
the problem itself, an educated visual inspection, with perhaps some cable and
connector wiggling, should reveal the real problem.
A good visual inspection requires an understanding of how the autochanger acts
under normal operation. This understanding can be achieved by completing the
self-paced training for the autochanger and getting as much hands-on experience
as possible. If you are familiar with the moves of the carriage/picker assembly
during the FIND HOME sequence and you are familiar with the behavior of the
drive, you will be able to more easily detect the real problem pointed to by a
suspect FRU.
Note
The specific steps of the FIND HOME sequence and the possible errors
which may result are listed in Section 4.11, The FIND HOME Sequence
and Information Logs.
An example:
Say the autochanger fails with an error code of 4D (hexadecimal), ‘‘MOTION
ERROR CHECKING FOR CARTRIDGE IN THE PICKER,’’ and lists the picker
(FRU 27) as the most likely failure. However, when you observe the unit while
running the ‘‘Wellness Test’’ (test 2), you see that the picker is having trouble
flipping. As you manually move the carriage/picker assembly around and touch
the components that are involved, you notice that the picker belt is abnormally
tight. The belt is tight because the picker motor is skewed.
Troubleshooting and Diagnostics 4–13
The error (4D) and suspect FRU gave an AREA to look at when troubleshooting.
Visual inspection (concurrent with physical checks) helps to link the suspect FRU
with the root cause by providing an area to examine. In the preceding example,
the components that INTERACT with, and DRIVE the picker are examined.
Table 4–3 lists each error code and procedure for finding the cause of the error,
using the autochanger’s suspect FRUs as a guide. Error codes and recovery
procedures are grouped by functional area in the autochanger.
At the BEGINNING of the list of errors for each functional group, you will find
general HINTS about what areas should be checked when errors appear in that
group. Be sure to check out those hints.
4.5.3 The FRU Isolation Test Sequence
The following list traces the execution of the FRU isolation test. A failure
requires additional tests at that point to determine the actual cause. The original
sequence is not continued if a test fails.
1. Look at the error code generated by the FIND HOME sequence. Some codes
may have obvious, implied FRUs. (eliminates optical sensors and their cables)
2. Run autochanger controller PCA tests that do not cause host communication
loss. (eliminates power supply, power supply cables, ROMs, RAM, motor
control IC, and microprocessor)
3. Check that the motors are capable of moving by attempting to move them
very small distances in both directions. (eliminates motor assemblies (except
belts), motor cables, PCA drivers)
4. Pull picker fingers back. They should come to a hard stop with the leadscrew
nut completely at the end of the leadscrew. (eliminates the picker belt)
5. Move carriage/picker assembly toward the drive. It should come to a hard
stop. (eliminates the carriage belt)
6. Move carriage/picker assembly away from the drive. The move has to be
far enough to be certain that the leadscrew can move, but not so far that
a jammed cartridge will cause the test to fail. (eliminates the carriage
leadscrew assembly)
If the FRU isolation test has been run from the front panel, the FIND
HOME sequence will automatically be executed at this point.
7. At this point, there is some level of confidence that the system is capable of
moving the carriage/picker assembly. Using the new information learned by
running these tests, look at the error codes, the move ID that failed, and how
the recovery system failed.
4–14 Troubleshooting and Diagnostics
4.6 Information Logs
The optical autochanger control panel diagnostic tests have two major purposes.
The first is to provide diagnostic information that can lead to early detection of
an autochanger problem. The second is to provide fault isolation tests.
All the logs are maintained within non-volatile RAM, and so are not affected by
cycling autochanger power. These logs are accessible from the control panel by
using the INFO option.
Procedure
To display information about the autochanger (e.g., the error log or move success
log) access the INFO option using the following steps.
1. With the autochanger power on and in the READY state, press
displays.
NEXT .
TEST *
until INFO * displays.
2. Press
NEXT
3. Press
ENTER
4. Press
NEXT
5. Press
ENTER
.
or
PREV
until the desired log number is displayed.
. The log information will be displayed.
Note
Some logs will display more information when
NEXT
Press
log.
ENTER
CANCEL
to stop the INFO display. Press
or
PREV
is pressed.
to choose another
You have several information selections that are outlined in Section 4.6.
The logs listed in Table 4–2 are accessible from the control panel by using the
INFO option.
Troubleshooting and Diagnostics 4–15
Table 4–2 Information Logs (INFO Logs)
No.
Log Name
Description
0
Autochanger Error
Log
The autochanger maintains a time-stamped history of
past diagnostic test errors that have occurred within the
autochanger. The error message maintained for each error
indicates the failure and the possible Field Replaceable
Units (FRUs) that may have caused the failure.
Displays as follows:
Err n y - nth error; actual error code
FRU A - suspect FRU #1
FRU B - suspect FRU #2
FRU C - suspect FRU #3
Test n - test that failed
abcdefgh - time stamp
1
Firmware Version
Number
Displays the current autochanger firmware version
number.
2
Element Status
Displays the status (empty or
autochanger element.
full) of the selected
Displays three numbers:
First Number = Element number
0 = picker
1 = drive
10 = mailslot
11 - 26 = storage slots
Second Number = Element type
1
2
3
4
=
=
=
=
picker
storage slot
mailslot
drive
Third Number = Data mask
00 = empty
01 = full
3
Software Clock
Displays the current ‘‘count’’ in seconds of the software
clock. (hexadecimal)
4
Drive Load Count
Displays the number of cartridge loads into the drive.
(continued on next page)
4–16 Troubleshooting and Diagnostics
Table 4–2 (Cont.) Information Logs (INFO Logs)
No.
Log Name
Description
5
Poweron Hours
Displays the number of hours the unit has been powered
on.
The term Move
used in Logs 6 - 10
means SCSI-level
moves by the picker
mechanism.
6
Current Move
Success Count
Displays the number of successful moves since the most
recent autochanger failure.
7
Move Success
Average
Displays the average of the values in Log 10 - Move
Success Log.
8
Current Move
Retry Count
Displays the number of move retries done since the most
recent autochanger failure.
9
Total Move Count
Displays the total number of moves and move attempts.
10
Move Success Log
Contains the number of successful moves that have
occurred without a failure. Each time a failure occurs,
the number of good moves is entered into the log and a
new count is started. This INFO display shows the most
recent 10 (or less) entries in the log. This log also shows
the retry counts corresponding to each log entry.
Example (2 displays for each entity):
1
33482
3
First display: 1 = entry number and
33482 = number of moves
Second display: 3 = number of retries
11
Display Runtime
Log
Flashes to each display until CANCEL is pressed.
A - Moves done
B - Retries
C - Automatic recoveries
D - Hard errors
12
Display Flip Count
Displays total number of picker flips.
13
Display Translate
Count
Displays total number of picker translates. For this unit,
the Translate Count will always be 0
(continued on next page)
Troubleshooting and Diagnostics 4–17
Table 4–2 (Cont.) Information Logs (INFO Logs)
No.
Log Name
Description
14
Display Mailslot
Rotation Count
Displays total number of mailslot rotations.
15
Number of Drives
Displays the number of disk drives in the unit.
16
Drive #1 SCSI
Address
Displays drive’s SCSI address. (This will always return a
‘‘1’’.)
17
Drive #2 SCSI
Address
Will return a ‘‘1’’ (same information as log 16) since
RW504/RW524 only has one drive.
20
Sensor Height
Displays the measured height of the picker sensor.
(hexadecimal)
21
Picker Cone Angle
Displays the measured picker cone angle from the nominal
position. (hexadecimal)
The cone angle is the sum of the upward droop on one side
of the picker plus the downward droop on the other side of
the picker.
22
Stack Tilt
Displays the measured stack tilt of the box. (hexadecimal)
The height of each side of the autochanger, or ‘‘stack’’, is
the height of each of the two sensors. Tilt is the measure
of the difference of the heights of the sides.
23 39
Minimum
Clearance
Minimum clearance for cartidge insertion into a magazine
or storage slot. Up/down clearance is as calculated
by Test 65 and Test 67. Up clearance/down clearance
(hexadecimal)
Example:
00DC 0028 = 220, 40
FFEC 0014 = -20, 20
23
Mailslot
24
Storage slot 1
25
Storage slot 2
26
Storage slot 3
27
Storage slot 4
28
Storage slot 5
29
Storage slot 6
30
Storage slot 7
(continued on next page)
4–18 Troubleshooting and Diagnostics
Table 4–2 (Cont.) Information Logs (INFO Logs)
No.
Log Name
31
Storage slot 8
32
Storage slot 9
33
Storage slot 10
34
Storage slot 11
35
Storage slot 12
36
Storage slot 13
37
Storage slot 14
38
Storage slot 15
39
Storage slot 16
Description
Troubleshooting and Diagnostics 4–19
4.7 Recovery from Hardware Errors
When a hardware failure occurs, a message is displayed on the control panel.
If the failure occurs during the power-on sequence, FAIL 1 is displayed. If the
failure occurs at some other time, MISLOAD or FAIL 0 is displayed. If a failure
occurs while you are running a test, FAIL # is displayed, where # is the number of
the test that failed.
When you press ENTER , the autochanger displays information about the
hardware failure.
The autochanger firmware can detect broken components such as a dead motor,
a missing belt, etc., but if failures are due to marginal or random problems, the
failing component may induce errors in other components. For example, if any
portion of the electronics becomes intermittent or if friction increases on a part,
different components of the autochanger may appear to fail at varied points as
the autochanger runs its code. This results in many different error codes.
Note
Instructions for running internal diagnostic tests are given in Section 4.9.
A list of the available test choices and their descriptions are given in
Section 4.10.
4.7.1 Hardware Error Codes and Recovery Procedures
Table 4–3 shows the hardware error codes possible and recovery procedures for
specific hardware errors.
In all cases, if you run a test and no error occurs, monitor for reoccurrence. If the
error repeats, use the list of FRUs logged by the FRU isolation test as a guide to
determine the problem. Replace the FRU(s) as necessary.
4–20 Troubleshooting and Diagnostics
Table 4–3 Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
00
No error
No action.
AUTOCHANGER CONTROLLER PCA ERRORS
The first step is to make sure all cables
are fully inserted into the connectors
on the controller pca.
01
ROM Checksum Error
Run test 31—ROM Checksum Test – verify
failure.
03
RAM Test Error
Run test 33—RAM Test—verify failure.
04
Microprocessor Test
Error
Run test 30 – Microprocessor Operation
Test—verify failure.
05
Controlled Area of RAM
Checksum Error
Recycle Power—verify failure.
06
Illegal interrupt seen by
microprocessor
Same as for error code 05
07
Illegal CPU exception
seen by microprocessor
Same as for error code 05
09
Firmware Error
Run test 3—Controller Test—(may not be
able to duplicate).
If error repeats –
Run configuration 16—resets default
values. Recycle power.
If error repeats –
Clear NVRAM by switching off power and
setting switch 1 on the 8-switch rocker
switch located on the controller PCA to the
‘‘closed’’ position and switching the power
back on. Clearing NVRAM sets the security
code back to the default (0-0-0).
If error repeats –
Replace autochanger controller PCA (FRU
01). Power-on—check fix.
SCSI INTERFACE-SPECIFIC ERRORS
Visual inspection is not possible for
errors 0B to 13.
0B
SCSI Controller Register
Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
(continued on next page)
Troubleshooting and Diagnostics 4–21
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
0C
SCSI Controller IC’s
RAM Failed
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
0D
SCSI Controller
Message Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
0E
SCSI Controller
Command Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
0F
SCSI Controller Kill
Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
10
SCSI Controller FIFO
Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
11
SCSI Controller Target
Sequence Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
12
SCSI Controller Com’nd
Sequence Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
13
SCSI Controller Status
Sequence Error
Run test 34—SCSI Interface Controller
Chip Test—verify failure.
LOOPBACK ERRORS
Note
Loopback connector (8878060095) is not a Digital stocked
part. Refer to Appendix B for
vendor ordering information.
18
SCSI Connector
Loopback Error in DBO
or I/O
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
19
SCSI Connector
Loopback Error in DB1
or C/D
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
1A
SCSI Connector
Loopback Error in DB2
or MSG
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
(continued on next page)
4–22 Troubleshooting and Diagnostics
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
1B
SCSI Connector
Loopback Error in DB3
or REQ
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
1C
SCSI Connector
Loopback Error in DB4
or ACK
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
1D
SCSI Connector
Loopback Error in DB5
or ATN
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
1E
SCSI Connector
Loopback Error in DB6
or SEL
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
1F
SCSI Connector
Loopback Error in DB7
or BSY
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
20
SCSI Connector
Loopback Error in DBP
or RST
Run test 41—SCSI Connector Loopback
Test (using loopback connector 8878060095)—verify failure.
MULTI-FUNCTION PERIPHERAL IC ERRORS
Visual inspection is not possible for
errors 29 to 2E
29
RS-232 Loopback data
did not match what was
sent
Run test 35—Multi-function Peripheral
Chip Test—verify failure.
2A
Timed out waiting for
RS-232 loopback data
Run test 35—Multi-function Peripheral
Chip Test—verify failure.
2B
Timer A did not count
down as expected
Run test 35 – Multi-function Peripheral
Chip Test—verify failure.
MOTOR CONTROL IC ERRORS
2C
Failed read/write test to
motor control IC
Run test 36 – Motor Control Chip Test—
verify failure.
2D
Motor Control Loopback
Test failed
Run test 36 – Motor Control Chip Test—
verify failure.
2E
Motor Control IC RAM
Test failed
Run test 36—Motor Control Chip Test—
verify failure.
(continued on next page)
Troubleshooting and Diagnostics 4–23
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
POWER SUPPLY ERRORS
33 - 34
Power Supply failed
Visually check the power cables and
connections. Run test 40—Power Supply
Test—verify failure.
DRIVE CONNECT ERRORS
38
Drive not connected
On error code 38 be sure to check:
•
Drive cabling
Good contacts
No cut or exposed wires
•
Drive tray not skewed
Run test 37—Drive Connector Test—verify
failure.
MECHANISM ERRORS
Check carriage/picker for free motion.
The carriage should travel easily along
the rail.
3C
Unspecified failure
Run test 11—Autochanger Mechanism
Exercise Test. On error—go to error code in
this table.
3E
Unspecified servo failure
Run test 11—Autochanger Mechanism
Exercise Test—verify failure.
Check the following assemblies in the
autochanger for loose labels or other
obstructions—picker, mailslot, drive,
and storage slots.
40
Unable to free picker
fingers for carriage
motion
Run test 50—Find Home Sequence—verify
failure.
41
Unable to verify picker
is at home position
Run test 50—Find Home Sequence—verify
failure.
(continued on next page)
4–24 Troubleshooting and Diagnostics
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
42
Unable to find home
position; Path-Clear
sensor blocked
Run test 50—Find Home Sequence—verify
failure.
43
Unable to clear PathClear sensors by moving
picker fingers back
Run test 50—Find Home Sequence—verify
failure.
44
Carriage motion failure
during Find Home
sequence
Run test 50—Find Home Sequence—verify
failure.
45
Unable to free picker
fingers
Run test 50—Find Home Sequence—verify
failure.
46
Carriage motion failed
while initializing Home
position (during Find
Home)
Run test 50—Find Home Sequence – verify
failure.
48 - 49
Carriage motion failed
during carriage/picker
assembly calibration
Run test 51—Carriage/Picker Assy
Calibration – verify failure.
4A
Motion error while
determining orientation
of the picker
Run test 50—Find Home Sequence—verify
failure.
4B
No sensor found
Run test 50—Find Home Sequence – verify
failure.
4C
Failed flip motion during
Find Home sequence
Run test 50—Find Home Sequence—verify
failure.
4D
Motion error checking
for cartridge in the
picker
Run test 50—Find Home Sequence—verify
failure.
Check the optical sensor, if necessary.
4E - 4F
Unable to measure
height of sensor
Run test 51 – Carriage/Picker Assy
Calibration—verify failure.
50
Excessive tilt of the
carriage/picker assembly
(away from the drive)
Run test 51—Carriage/Picker Assy
Calibration – verify failure.
(continued on next page)
Troubleshooting and Diagnostics 4–25
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
51
Excessive tilt of the
carriage/picker assembly
(toward drive)
Run test 51—Carriage/Picker Assy
Calibration—verify failure.
52
Excessive cone angle on
picker
Run test 51 – Carriage/Picker Assy
Calibration—verify failure.
54
Unable to complete an
interrupted move (at
power-up)
Run test 60—FRU Isolation Test—
verify failure. If no error, monitor for
reoccurrence. If test 60 shows an error
code, look up the hardware error code
in this table and follow the recovery
procedures for that error.
55
Unable to find top of
unit
Run test 51 – Carriage/Picker Assy
Calibration—verify failure.
EXERCISER TEST ERRORS
56
Need to issue Initialize
Status command
No FRUs failed. Run test 10 to initialize
the element status.
57
Invalid test configuration
No FRUs failed. Check cartridge
configuration. Check that the cartridge
configuration (number and location) are
correct for the test you are doing.
59
Exerciser unrecovered
error
No FRUs failed. Exerciser had an
unrecovered error. Rerun exerciser. If
exerciser fails again, access the recovery
log. Recovery log is available only through
the SCSI interface. Call CSC. Need to use
the DOSDASS2 utility (see Appendix B for
ordering information).
5A
Invalid test configuration (elements reserved)
No FRUs failed. Can’t do the selected test
on a reserved cartridge. Check cartridge
reservations. Rerun the test.
5B
Initialize Element
Status command failed
No FRUs failed. The initialization of an
element status failed. Rerun initialization.
If initialization fails again, access the
recovery log. Recovery log is available only
through the SCSI interface. Call CSC.
Need to use the DOSDASS2 utility (see
Appendix B for ordering information).
(continued on next page)
4–26 Troubleshooting and Diagnostics
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
5C
Error
Recovery Procedures
Shipping diagnostic run
with cartridges in drive
mechanism
No FRUs failed. Shipping warning.
Take all disks out of the optical drive
mechanism.
CALIBRATION SENSOR SYSTEM ERRORS
60 - 61
Home sensor failed
Run test 51—Carriage/Picker Assy
Calibration—verify failure.
PATH-CLEAR SENSOR SYSTEM ERRORS
64 - 65
Intermittent path-clear
sensor beam
Run test 44—Clear Path Test—verify
failure. Run test 51—Carriage/Picker Assy
Calibration—verify failure.
66 - 67
Path physically blocked
Run test 44—Clear Path Test—verify
failure. Run test 51—Carriage/Picker Assy
Calibration—verify failure.
6B - 6C
Path-clear LED failed
Run test 44—Clear Path Test—verify
failure. Run test 51—Carriage/Picker Assy
Calibration—verify failure.
6D - 6E
Path-clear sensor failed
Run test 44—Clear Path Test—verify
failure. Run test 51—Carriage/Picker Assy
Calibration—verify failure.
6F
Path-clear sensor system
failed
Run test 44—Clear Path Test—verify
failure. Run test 51—Carriage/Picker Assy
Calibration—verify failure.
MAILSLOT/STORAGE SLOT ERRORS
Check for loose labels or other
obstructions in errors that involve
the mailslot (B0-B2).
B0
Mailslot will not rotate
Run test 17—Mailslot I/O Test—verify
failure.
B1
Inside mailslot sensor
failed
Run test 43—Mailslot Sensor Test—verify
failure.
B2
Mailslot will not accept
or release cartridge
Run test 17—Mailslot I/O Test—verify
failure.
(continued on next page)
Troubleshooting and Diagnostics 4–27
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
Check for loose labels or other
obstructions in errors B3 and B4.
Also, make sure that the storage slots
are not skewed.
B3
Storage slot will not
accept or release
cartridge
Run test 15—Storage Slot Test—verify
failure.
B4
Outside mailslot sensor
failed
Run test 43 – Mailslot Sensor Test—verify
failure.
DRIVE ERRORS
The autochanger only checks for
the PRESENCE of a drive. To run
complete drive tests requires an
external diagnostic.
On drive error codes, check all cabling to
/from the drive for
No broken wires
No worn cables
No loose connections
Check the drive tray.
B8
Drive access error
Run test 16—Drive I/O Test – verify failure.
Access the drive logs. Drive logs are
available only through the SCSI interface.
Call CSC.
DRIVE EJECT ERRORS
BC
Drive access failure
Run test 16—Drive I/O Test – verify failure.
Access the drive logs. Drive logs are
available only through the SCSI interface.
Call CSC.
FRU DETECTION TEST ERRORS
Check carriage/picker for free motion.
The carriage should travel easily along
the rail; you should be able to easily
flip the picker using the picker belt.
(continued on next page)
4–28 Troubleshooting and Diagnostics
Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)
Error
Recovery Procedures
C8
Unable to gain proper
servo control of motors
Run test 60—FRU Isolation Test—verify
failure.
C9
Unable to move picker
motor
Run test 60—FRU Isolation Test—verify
failure.
CA
Unable to move carriage
motor
Run test 60—FRU Isolation Test—verify
failure.
CB
Unable to move either
motor
Run test 60—FRU Isolation Test—verify
failure.
CC
Unable to find a hard
stop while turning the
picker motor
Run test 60—FRU Isolation Test—verify
failure.
CD
Unable to find a hard
stop while turning the
carriage motor
Run test 60—FRU Isolation Test—verify
failure.
CE
Excessive force needed
to move the carriage
leadscrew
Run test 60—FRU Isolation Test—verify
failure.
MISCELLANEOUS ERRORS
FC
The test can only be run from the control
panel or from the RS-232 interface.
FD
The test can only be run from the SCSI
interface.
FE
The test did not run; probably a
configuration error.
FF
Invalid test number.
Troubleshooting and Diagnostics 4–29
4.8 Error Information Through SCSI Commands
When there are errors in autochanger movements, two main approaches are
available to get information and to run execiser tests. The approach usually
depends on whether the error encountered was a hard error or whether it was a
soft or intermittent error.
•
Troubleshooting Using the Control Panel and Observation - This method is
usually used in situations where you have a hard error.
•
Troubleshooting Through the SCSI Bus - This method is used in situations
where you have a soft or intermittent error.
Using data on the SCSI bus, you can determine exactly what the autochanger
was doing when a failure occurred; all the way down to the macro-move and
micro-moves.
Also, through the Log Sense and Request Sense commands, you can gather
information on the optical drives; which cannot be done through the control
panel.
See Appendix A for information on decoding VMS operating system error logs and
SCSI-2 codes.
An external utility is needed to read the data on the SCSI bus. Hewlett-Packard
offers a diagnostic utility called DOSDASS2 that provides this capability. This
utility is not offered to the field, however, it is available from Hewlett-Packard or
Digital CSC (refer to Appendix B for ordering information).
4–30 Troubleshooting and Diagnostics
Figure 4–4 Information and Tests Through the SCSI Bus
When troubleshooting through the SCSI bus, refer to the following information:
•
Ordering information for Offline Diagnostics for Optical Library Products
located in Appendix B.
This offline diagnostic, DOSDASS2, can be used to access the above
information through the SCSI bus.
In addition, refer to the following tables:
Request Sense Command Tables (Table A–4)
This table shows error information and information about the state of
the autochanger after an error has occurred, which is returned when a
Request Sense command is issued through the SCSI bus.
Log Sense Command Table (Table 4–2)
This table shows the error and move information which is stored in
various logs during autochanger operation and when running internal
diagnostics.
4.9 Diagnostics
Several diagnostic programs and tests are available for the disk library. This
section gives information on how to run these tests/programs or where to find this
information.
The main type of diagnostic available for the disk library are Internal
Diagnostics.
Troubleshooting and Diagnostics 4–31
These tests are run from the control panel and are divided into four groups:
sequence tests, exerciser tests, electronic core tests, and mechanism core tests.
These tests are fully explained in Section 4.10. Instruction for running these
tests are provided in Section 4.9.2.
4.9.1 Offline Diagnostics
A diagnostic utility called DOSDASS2 is available from Hewlett-Packard for
accessing the optical disk library through the SCSI bus.
DOSDASS2 fully exercises either standalone multifunction optical drives or
autochangers that contain multifunction optical drives. Information for obtaining
and using DOSDASS2 is found in Appendix B.
4.9.2 Internal Diagnostic Tests
An extensive set of internal diagnostic tests is available for the autochanger.
Except for the power-on sequence test, the running of tests is not automatic. The
operator may initiate each test from the control panel.
A test is actually a sequence of separate tests that are called and run in series.
Each test exercises a specific portion of the autochanger. Each test is identified
by a test number that is requested when the test is to be run. Tests return either
PASS or FAIL.
All the tests are combined into groups of similar functions.
Sequence Tests (1 - 9) execute sequences of individual tests within the range of
test 10 through test 69. Sequences may be used to either test many portions of
the autochanger or as an autochanger exerciser. When a sequence test is selected,
the autochanger executes the tests in sequence until an error occurs or until the
sequence successfully completes.
Exerciser Tests (10 - 29) do simple autochanger mechanism moves to check out
elementary functions.
Electronics Core Tests (30 - 49) run basic tests of the autochanger controller PCA.
Autochanger Mechanism Core Tests (50 - 75) run basic tests of the autochanger
mechanism. These tests make combinations of moves that can help to detect the
source of failures.
Note
Section 4.10 contains a complete listing and description of these diagnostic
tests. The following instructions provide information for running these
tests.
4–32 Troubleshooting and Diagnostics
Procedure for running tests
To display test information and to choose tests to execute, access the TEST option
using the following steps.
1. With the autochanger power on and in the READY state, press
displays.
2. Press
ENTER
3. Press
NEXT
NEXT .
TEST *
. TEST 0 displays.
or
PREV
until the test number you want shows in the display.
4. Press ENTER to choose the test. ONCE displays. You may accept ONCE by
pressing ENTER or press NEXT or PREV to choose 10, 100, 1000, or LOOP
times. LOOP runs the test continuously until OPTION is pressed or the unit is
powered off.
Note
Any test may be stopped, at any time, by pressing CANCEL . (Some tests
require that CANCEL be pressed twice.) The unit will stop the test after it
completes its current activity.
5. Once you have pressed
RUN nn displays.
ENTER
for the number of times the test will repeat,
6. At this point the test runs. If no problems are encountered, the message PASS
nn displays. You may press CANCEL to get back to the READY state; or, you
may press ENTER to run another test.
If a problem occurs during the test, the message FAIL nn displays. Press
ENTER to gain information about the failure. An ERROR nn displays. The error
log stores the FRU information, TEST nn information, and a time stamp.
4.10 Diagnostic Test Command Descriptions
The following is a description of the diagnostic test commands. Sequences may
combine both exercisers and tests.
Troubleshooting and Diagnostics 4–33
4.10.1 Sequence Tests
Table 4–4 Sequence Tests
No.
Test Name
Description
1
Poweron
Checks all digital data paths and normal machine
operation. This test runs the same sequence of TESTS
as when initiated by an actual power on, but does NOT do
all operations (see below).
Sequence Order:
3 - Controller Test
40 - Power Supply Test
– - Motor Connection Test (no number)
5 - Initialize Mechanism
46 - Board Configuration
– - Restore (if needed). If power failed in the middle
of a move, the autochanger tries a ‘‘restore’’ of the
last move. The autochanger tries to put the cartridge
back to where it came from. This attempt could fail
(Poweron sequence would fail). POWERON ONLY.
10 - Initialize Element Status (if needed).
38 ‘‘Light Show’’ in the indicators of the control panel.
– - Mailslot rotation (if not secured). This rotation
could fail(Poweron sequence would fail). POWERON
ONLY.
2
Wellness Test
Checks out the general capability of the autochanger.
Needs one loaded cartridge; drives and mailslot empty.
(continued on next page)
4–34 Troubleshooting and Diagnostics
Table 4–4 (Cont.) Sequence Tests
No.
Test Name
Description
3
Controller Test
This sequence is run by the autochanger controller at
poweron to check out all paths, and operation of the servo
motor and autochanger circuitry.
Sequence Order:
30
31
33
32
34
36
35
31
33
32
34
36
35
37
5
Initialize
Mechanism
-
Processor Test
ROM Checksum Test
Non-Destructive RAM Test
RAM Checksum Test
SCSI Interface Controller IC Test
Motor Control IC Test
Multi-Function Peripheral IC Test
ROM Checksum Test
Non-Destructive RAM Test
RAM Checksum Test
SCSI Interface Controller IC Test
Motor Control IC Test
Multi-Function Peripheral IC Test
Drive Connect Test
Prepares the unit for movement.
Sequence Order:
Initialize RAM variables to defaults
50 - Find Home
Troubleshooting and Diagnostics 4–35
Table 4–5 Exerciser Tests
No.
Test Name
Description
10
Initialize Element
Status
Does the same function as the SCSI Initialize Element
Status command. It physically scans the entire unit to
determine which storage slots and drives have disks.
11
Mechanism
Exercise Test
Makes a combination of moves with a PASS/FAIL result.
This exerciser is a sequence of other exerciser tests—12,
13, 14, 15, 16, and 17. This exerciser returns an error code
#57H Invalid Configuration if there are no cartridges
loaded into the unit, or if any drive is full. Needs one
loaded cartridge.
12
Carriage/Picker
Move Test
Moves the carriage/picker assembly the full length of the
rails with the picker on first one side, then the other.
Returns PASS/FAIL. No cartridges are required.
13
Translate Test
Makes a combination of moves with a PASS/FAIL
result. It does several translations from various starting
positions. No cartridges are required.
14
Flip Test
Makes a combination of moves with a PASS/FAIL result.
It does several flips at various locations. No cartridges are
required.
15
Storage Slot Test
Makes a combination of moves with a PASS/FAIL result.
It moves a cartridge from a randomly-chosen full to a
randomly-chosen empty slot, with a random flip. It then
moves the cartridge back to its original storage slot with
its original orientation. This exerciser returns an error
code 57H, Invalid Configuration, if there are no
cartridges loaded into the unit or if all storage slots are
full. Needs one loaded cartridge.
16
Drive I/O Test
Makes a combination of moves with a PASS/FAIL result.
It moves a cartridge from a randomly-chosen full slot to
a drive, with a random flip. It then moves the cartridge
back to its original slot with its original orientation. It
does this once for each optical drive. Returns an error
code 57H, Invalid Configuration, if there are no
cartridges loaded into the unit or if any drive is loaded.
Needs one loaded cartridge; drives must be empty.
(continued on next page)
4–36 Troubleshooting and Diagnostics
Table 4–5 (Cont.) Exerciser Tests
No.
Test Name
Description
17
Mailslot I/O
Makes a combination of moves with a PASS/FAIL
result. It moves a cartridge from the lowest-numbered
full slot to the mailslot with a random flip. It then
moves the cartridge back to its original slot with its
original orientation. Returns error code 57H, Invalid
Configuration if there are no cartridges loaded into the
unit or if the mailslot is full. Needs one loaded cartridge;
mailslot must be empty.
18
Speed Factor
Setting Utility
Allows the setting of the speed factor as the first
parameter given. The speed factor determines how fast
the system moves the mechanics. The number provides
1/Parameter speed (e.g., Parameter=3 runs the motors at
1/3 of full speed). This test can only be run from the
SCSI Interface.
19
Zero Maximum
Force Log
The maximum force log is initialized to all zeros.
20
Set Speed Factor to
Full Speed
Allows the mechanics to be run at full speed.
21
Set Speed Factor to
Half Speed
Allows the mechanics to be run at half speed.
22
Set Speed Factor to
Quarter Speed
Allows the mechanics to be run at quarter speed.
23
Shipping
Moves the picker to the appropriate position for
preparation for shipping.
24
Fill Picker
Moves a cartridge into the picker from the first storage
slot.
25
Empty Picker
Moves a cartridge from the picker to the first empty
storage slot.
26
Zero Runtime Log
The entire runtime log is initialized to all zeros.
27
Set Minimum
Retries
This sets the number of retries to 1. This may be set to
see if the chosen test is doing what you want it to do.
After you are satisfied that the test is what you want,
run test 28 which resets the number of retries to default
values.
28
Set to Default
Number of Retries
Resets the number of retries to powerup default values.
Used after setting retries to 1 by test 27.
29
Zero Error Log
Zeroes the Error Log.
Troubleshooting and Diagnostics 4–37
4.10.2 Electronic Core Tests
Table 4–6 Electronic Core Tests
No.
Test Name
Description
30
Microprocessor
Operation Test
Does a functional check of the microprocessor. This test
must shut down the servo system; a Initialize Mechanism
Test is run when this test finishes.
31
ROM Checksum
Test
Does a checksum verification of the ROM.
32
RAM Checksum
Test
A checksum of the ‘‘Controlled’’ area of RAM is kept on a
continuous basis. This test verifies that the checksum is
still valid.
33
Non-Destructive
RAM Test
Tests all the controller’s RAM, checking for data
acceptance and retention. The test is non-destructive
to RAM unless interrupted by power failure. To run
correctly, this test must shut down the servo system; as
a result, a Initialize Mechanism Test runs when this test
finishes.
34
SCSI Interface
Controller Chip
Test
Checks out operations of the SCSI interface controller
chip. This test will not be run if initiated via SCSI, it
reports PASS.
35
Multi-Function
Peripheral Chip
Test
Tests the functionality of the Multi-Function Peripheral
chip. It verifies the timer by comparing it to he CPU clock
and tests RS-232 capabilities with an on-chip loopback.
36
Motor Control Chip
Test
Exercises the registers of the motor control IC. To run
correctly, this test shuts down the servo system.
37
Drive Connect Test
Checks for expected drive configuration. This is done by
polling the drive connect signal on each of the possible
drives. This line is grounded at the drive end if a drive is
connected. If the drives physically connected do not match
the expected configuration, then an error is reported.
38
Control Panel Light
Show
Lights each portion of the display individually and then
together. No feedback; always passes.
39
Control Panel
Button Check
Displays the name of the button pressed. Press CANCEL
twice to exit.
40
Power Supply Test
Looks at both the 12-Volt and the 24-Volt pow that they
are within limits. The limits for the 12V supply are 11V
and 13V and the 24V supply limits are 23.5V and 25.5V.
(continued on next page)
4–38 Troubleshooting and Diagnostics
Table 4–6 (Cont.) Electronic Core Tests
No.
Test Name
Description
41
SCSI Connector
Loopback Test
(interactive)
Runs a loopback through SCSI connectors, checking
proper operation of the SCSI drivers, receivers, and cables.
Requires an external loopback hood with terminator
power. Will not run if initiated via SCSI; if so, it reports
error FCH Test Did Not Run.
42
Optical Sensor Test
(and Mailslot)
(interactive)
Checks the status of the two optical sensors. Also checks
the s the Mailslot sensor (see test 43). Three ‘‘0’’s are
placed on the control panel display; one at the left position
in the display, one in the middle of the display, and one
at the right position in the display. The mark is an open
zero if the sensor is not blocked, and a zero filled in with
lit segments if a sensor is blocked. No FRU is returned.
43
Mailslot Sensor
Test (and Optical
Sensor)
(interactive)
See description for test 42.
50
Find Home
Sequence
Moves the picker to a known ‘‘home’’ spot. This test
assumes nothing about the state of the mechanics. The
‘‘home’’ location is at the lower left position of the box. The
servo system is initialized to the ‘‘home’’ location. It then
automatically runs test 51.
51
Carriage /Picker
Assembly
Calibration Test
Runs the portion of the mechanism recalibration related
to the optical sensors. It measures sensor offsets and
calculates picker tilt and droop. This test assumes that
the mechanics and servo system are functional.
60
FRU Isolation Test
Assumes that something has physically failed, either
electronic or mechanical. A series of special low level tests
are run to select the three (or fewer) FRUs that are most
likely to be at fault. Tests 30, 31, 33, 35, 36, 40, and 50
are executed as a part of the isolation process. Returns an
error code, three suspect FRUs in decreasing order of fault
probability, and a time stamp.
(continued on next page)
Troubleshooting and Diagnostics 4–39
Table 4–6 (Cont.) Electronic Core Tests
No.
Test Name
Description
65
Calibrate
Magazines
Calculates a min/max clearance for a magazine. (The
selected magazine should be empty.) The autochanger
requires a disk in the mailslot. The test passes if
clearance is 85 encoder counts (1 mm) up and down.
(See info 23 for actual values.)
If this test is run by SCSI command, set Byte 1 to the
storage slot number. (There are 16 storage slots.) The test
returns:
Byte 2-3 - clearance up
Byte 4-5 - clearance down
66
Clear Magazine
Offset
Clears the value calculated in test 65.
67
Calibrate Mailslot
Calculates an offset for the Mailslot. The Autochanger
requires a disk in the Mailslot.
68
Clear Mailslot
Offset
Clears the value calculated in test 67.
70 74
Reserved
For design/production use only.
75
UPS Test
Tests whether or not the UPS is connected properly.
The test returns PASS if connected properly, FAIL if
the UPS is not connected properly or if there is no UPS
connected.
153
Random Exerciser
Randomly exercises the autochanger. Needs at least two
cartridges and these cartridges will be randomly changed.
THIS TEST IS NOT TO BE USED BY THE CUSTOMER.
DO NOT USE TEST WHEN CUSTOMER’S DISKS ARE
IN THE LIBRARY.
Parameter A is drive usage (1=every time 10=every 10th
time).
Parameter B is mailslot usage. Default is 50, which is
every 50th time the mailslot is used.
Parameter C is the number of exchanges between
exchanges. Default is 0.
Hit CANCEL to stop.
4–40 Troubleshooting and Diagnostics
4.11 The FIND HOME Sequence and Information Logs
4.11.1 Specific Steps of the FIND HOME Sequence
The following FIND HOME sequence executes all the motions used in normal
autochanger operation. Understanding the motions explained here, and the likely
errors during these motions, should help you diagnose problems that may be
occurring in the unit you are working on.
The following sequence lists each large movement in the FIND HOME sequence.
If there is a problem during a movement, the most likely hardware error is listed
after the movement in decending order of probability.
Hardware error numbers and recovery procedures are listed in Table 4–7.
Note
When running the FIND HOME sequence, you will be able to see what
the mechanism was attempting when an error occurred by setting
RETRIES to 1 (Test 27). When limited to a single execution, the
autochanger is prevented from entering any error recovery sequences.
If you want to examine movements more closely, set the speed to half or
quarter speed (Test 21 or Test 22).
Possible errors are not accessable or displayed through the control panel.
Errors returned are micro-move errors. Micro-move errors are explaned
in Chapter 6.
Note
Errors are expressed in hexadecimal format.
1. Clear the picker of any obstructions that would prevent carriage/picker
movement. (MMID# 56 to 6E)
a. Possible error:
40–Unable to free the picker fingers in preparation for carriage motion.
2. Clear an area large enough to enable a flip to take place. (MMID# 49 to 4C)
a. Possible error:
44–Carriage motion failure during the Find Home sequence.
Troubleshooting and Diagnostics 4–41
3. Initialize the picker fingers by pulling the fingers back to a hard stop and
calibrate flip mechanism. (MMID# 4D, 4F, 7, 8)
a. Possible error:
45–Unable to free the picker fingers.
4. Initialize the carriage/picker position by moving it toward the drive-end of the
until it hits a hard stop. (MMID# 47, 48)
a. Possible error:
46–Carriage motion failed while initializing Home position during Find
Home sequence.
5. Determine if the library is in the tower or the rackmount configuration.
(MMID# 1, 2, 50, 51)
a. Possible error:
41–Carriage motion failed during carriage/picker assembly calibration.
6. Determine if there is a cartridge in the picker by plunging the fingers against
a hard stop (MMID# 2, 52, 5)
a. Possible error #1:
4D–Motion error while checking for cartridge in picker.
b. Possible error #2:
65–Intermittent path-clear sensor beam.
7. Find orientation of the picker (MMID# 1,2, 53, 54, 7, 8)
a. Possible error #1:
4A–Motion error while determining the orientation of the picker.
b. Possible error #2:
4C–Failed flip motion during the Find Home sequence
c.
Possible error #3:
60–Optical sensor failed
8. Calibrate the end of the picker with respect to the sensor (Do twice on each
side of the picker, to be sure) (MMID# 1, 2, 53, 54, 7, 8)
a. Possible error #1:
49–Carriage motion failed during carriage/picker calibration.
b. Possible error #2:
4C–Failed flip motion during the Find Home sequence
4–42 Troubleshooting and Diagnostics
c.
Possible error #3:
60–Optical sensor failed
d. Possible error #4:
50–Excessive tilt of cartridge/picker assembly (away from the drive)
e.
Possible error #5:
51–Excessive tilt of cartridge/picker assembly (toward the drive)
9. Filp the carriage/picker assembly with the nut facing upward if necessary
(MMID# 1, 2, 7, 8)
a. Possible error:
4C–Failed flip motion during Find Home sequence
10. Initialize the mailslot. (MMID# 2, 2B to 35)
a. Possible error:
B0–Mailslot will not rotate.
These steps are repeated, in order, until all pass or until any four failures
accumulate. If four failures occur, the errors are diagnosed to three FRUs and a
hardware error code is reported.
Troubleshooting and Diagnostics 4–43
4.12 Micro-Move Reference Table for Viewing FIND
HOME Sequence
Table 4–7 RW504/RW524 Micro-Move ID Table
Move ID
(hex)
Description
0
No motion; no commands pending
1
Carriage motion; full speed (away from drives)
2
Carriage motion; full speed (toward the drives)
3
Carriage motion; move fingers forward during full speed; away from the drive
4
Carriage motion; move fingers forward during full speed; toward the drive
5
Full speed finger motion
7
Pull fingers back to depress flip button
8
Flip
9
Verify flip complete
A
Push fingers out to release flip button
11
Move fingers toward storage slot
12
Detect cartridge in storage slot before grab and during Initialize Element
Status
13
Take up the slack in the fingers before grabbing the carriage
14
Pull cartridge back from storage slot with cartridge
15
Push cartridge forward into storage slot
16
Detect cartridge in storage slot after insert
17
Pull fingers back from storage slot after releasing cartridge
18
Move fingers toward drive; prepare to grab cartridge
19
No motion; waiting for the drive to eject the cartridge
1A
Cartridge shake; to assist the cartridge ejected from the drive to slide into the
picker
1B
Move fingers toward drive with intent to grab cartridge
1C
Pull fingers back from drive with cartridge
1D
Insert cartridge into drive until slider engages
(continued on next page)
4–44 Troubleshooting and Diagnostics
Table 4–7 (Cont.) RW504/RW524 Micro-Move ID Table
Move ID
(hex)
Description
1E
Insert cartridge into drive after slider has engaged
1F
Move fingers with cartridge toward drive, determining distance of cartridge in
drive. Look for drive to accept cartridge
20
Drive failed to accept cartridge; pull cartridge back
21
Drive accepted cartridge; release cartridge and pull fingers back
22
Carriage motion; during mailslot access
23
Move fingers toward drive with intent to grab cartridge
24
Detect a cartridge in the mailslot before grab
25
Take up the slack in the fingers before grabbing the cartridge
26
Pull cartridge back from the mailslot with cartridge
27
Carriage motion during mailslot access
28
Push cartridge forward into the mailslot
29
Detect a cartridge in the mailslot after insert
2A
Pull fingers back from mailslot after releasing cartridge
2B
Move leadscrew tab toward actuator arm before pulling mailslot in
2C
Carriage motion toward actuator arm where mailslot is engaged before pulling
mailslot in
2D
Move leadscrew tab to mailslot actuator arm before pushing mailslot out
2E
Carriage motion toward actuator arm where mailslot is engaged before
pushing mailslot out
30
Release tension on the mailslot rotate arm
31
Release tension on the mailslot rotate arm
32
Rotate the mailslot
33
Rotate the mailslot
34
Verify the rotation of the mailslot is complete
35
Rotate the mailslot when rotational position unknown
36
Check for a cartridge in the picker; same motion is used to check for a
cartridge in mailslot or storage slot when picker contains a cartridge
37
Pull fingers back during test for a cartridge
(continued on next page)
Troubleshooting and Diagnostics 4–45
Table 4–7 (Cont.) RW504/RW524 Micro-Move ID Table
Move ID
(hex)
Description
38
Move fingers at full speed during test for a cartridge
39
Positioning before and after test for a cartridge in drive
3A
Check for a cartridge in drive
3D
Move carriage to drive bang position
3E
Verify the presence of a cartridge by pressing cartridge against drive face
3F
Short carriage motion to check for cartridge sticking out of a storage slot after
insertion (toward drive)
40
Short carriage motion to check for cartridge sticking out of a storage slot after
insertion (away from drive)
41
Short carriage motion to check for cartridge sticking out of the drive after
insertion (toward drive)
42
Short carriage motion to check for cartridge sticking out of the drive after
insertion (away from drive)
43
Short carriage motion to check for cartridge sticking out of the drive during
error recovery (toward, then away from drive)
47
Carriage motion toward drive; looking for hard stop in the Find Home
sequence
48
Release forces after finding hard stop
49
Carriage motion away from drive finding room to flip in FIND HOME
sequence
4A
Fast carriage motion toward drive to flip position
49
Carriage motion toward drive finding room to flip in FIND HOME sequence
4A
Fast carriage motion when flip area found in needed direction
4D
Slow flips during FIND HOME sequence
4E
Push fingers slowly out of picker after flips in FIND HOME sequence
4F
Check for picker belt in FRU isolation tests, or slow finger motions during
error recovery
50
Carriage motion toward drive looking for hard stop before measuring carriage
travel
51
Verify the maximum required carriage travel from the drive
52
Test for presence of cartridge by pushing against hard stop
(continued on next page)
4–46 Troubleshooting and Diagnostics
Table 4–7 (Cont.) RW504/RW524 Micro-Move ID Table
Move ID
(hex)
Description
53
Long carriage motion during carriage/picker assembly calibration
54
Short carriage motion during carriage/picker assembly calibration (fine
measure)
57
Error occurred while inserting cartridge, push cartridge farther into storage
slot
59
Move fingers toward storage slot during storage slot recovery
5A
Pull fingers back from storage slot during storage slot recovery
5B
Carriage motion during drive recovery
5C
Carriage motion during storage slot recovery
5D
Carriage motion during drive insert recovery
5E
Slowly push fingers out then in during drive recovery
5F
Drive recovery
60
Drive recovery
61
Short carriage motions during drive recovery (wiggle motion)
62
Long carriage motions in drive recovery (toward, then away from the drive)
64
Pull fingers back into picker during recovery
65
Pull fingers back from storage slot during storage slot recovery
66
Carriage motion while testing for cartridge in drive during drive insert
recovery
67
Pull back fingers from drive after releasing cartridge during recovery
68
Move fingers with cartridge toward drive, using short steps, look for drive to
accept the cartridge during recovery
69
Carriage motion during initial recovery (away from drive)
6A
Carriage motion during initial recovery (toward drive)
6B
Push fingers out of picker during initial recovery
6C
Push fingers back into picker during initial recovery
6D
Carriage motion during initial recovery (away from drive)
6E
Carriage motion during initial recovery (toward drive)
6F
Check for carriage motor belt in FRU isolation tests
Troubleshooting and Diagnostics 4–47
5
Removal and Replacement
5.1 Field-Replaceable Assemblies
The RW504/RW524 optical disk library contains the following major assemblies:
•
Multifunction optical drive mechanism
•
Mailslot assembly
•
Power supply
•
Front panel assembly
•
Leadscrew assembly
•
Picker/carriage assembly
•
Autochanger controller
5.2 ESD Precautions
The RW504/RW524 optical disk library contains very sensitive electrical
components. It is EXTREMELY IMPORTANT that you follow the proper
procedures for preventing ESD (Electrostatic Discharge). Use wrist-grounding
straps, anti-static mats, and anti-static work stations when removing and
replacing the major assemblies.
CAUTION
Failure to follow proper procedures could lead to intermittent failures
and/or premature hard failures in the disk controller and mechanism.
Removal and Replacement 5–1
5.3 Tools Required
The following tools are needed for assembly/disassembly of the autochanger:
•
Torx® driver with the following bits: T-10, T-15, T-25
•
Dags
•
Needle-nosed pliers
•
Pozidriv® magnetized screwdriver
•
Flatblade screwdriver
5.4 Assembly/Disassembly Procedures
WARNING
Be sure to disconnect the power cord before taking the disk library apart
to prevent possible electrical shock.
CAUTION
Do not switch off power to the disk library until you are sure the SCSI
bus is inactive. Switching off the disk library when the SCSI bus is active
can cause data loss and/or indeterminate bus states.
Use caution when servicing the optical disk library to insure that disk
cartridges are not moved from their original slot locations. If you need to
remove the cartridges, record their slot locations and orientation so they
can be replaced to their original positions. Failure to follow this practice
will result in a serious loss of file system integrity.
5.4.1 Service Access
WARNING
DO NOT disassemble the drive mechanism.
The optical drive mechanism becomes a Class 3B laser device when
disassembled. If the drive is disassembled, exposure to the invisible laser
beam and hazardous invisible laser radiation could result in blindness.
5–2 Removal and Replacement
Note
A drive that has been disassembled will not be accepted as an exchange
assembly.
1. Remove power from the optical disk library. Switch off both the power switch
on the back panel and the operation switch on the front panel.
2. Unplug the power cord from the back panel.
3. Remove the disk library top cover.
a. Remove the four T-25 screws on the back cover.
b. Slide the top cover toward the back of the unit to free the four tabs from
the sides of the autochanger chassis, and then pull the sides of the top
cover out slightly while lifting the cover off.
4. Remove the service access panel (located on the right side of the disk library
when facing the front panel).
a. Remove the four T-15 screws at the back end of the access panel.
b. Slide the side panel toward the back of the autochanger until the four
tabs on the access panel are released from the autochanger chassis.
Note
When removing the access panel, be careful not to detach the four copper
clips from the front of the access panel.
c.
Lift the panel off and away from the autochanger chassis.
5. Remove the clear plastic center shield by pushing on the center section of the
shield until the top of the shield can be pulled out from under the top of the
chassis.
When reassembling:
•
When replacing the clear plastic shield, the tab fits into a slot at the bottom
of the autochanger chassis.
•
When replacing the access panel, make sure the SCSI cable at the back of
the autochanger is out of the way and doesn’t get pinched between the access
panel and the autochanger chassis.
Removal and Replacement 5–3
•
When replacing the top cover, make sure the tabs on the bottom of the top
cover fit into the slots on the bottom of the autochanger chassis.
5.4.2 Replacing the Autochanger Controller PCA
Note
The front bezel assembly can be removed and the operation switch cable
disconnected if you wish, to allow more clearance for removing/replacing
the controller PCA. (See Section 5.4.3.)
1. Follow the steps in the service access procedure at the beginning of this
chapter.
2. Unplug the following cables from the controller PCA (refer to Figure 5–1):
!
"
#
$
%
&
'
(
)
UPS cable
Carriage motor power cable
Motor power cable
Carriage assembly umbilical cable
Carriage motor encoder cable
SCSI ribbon cable (and terminator if differential SCSI interface)
Front panel cable
Interconnect cable
Module power cable
5–4 Removal and Replacement
Figure 5–1 Controller PCA Cable Connections
3. Remove the controller PCA from the chassis.
a. Remove the eight T-15 screws that secure the PCA to the chassis (See
Figure 5–2).
b. Lift the side of the controller PCA that faces toward the back of the
autochanger out towards you slightly, and then slide the PCA towards
the rear of the autochanger until it can be removed without catching any
cabling.
Removal and Replacement 5–5
Figure 5–2 Removing the Autochanger Controller PCA
When reassembling:
•
Verify that the jumper at J19 on the controller PCA is on the upper two pins.
(See Figure 5–3 for correct jumper position.)
•
Verify that the 8 switch rocker switch (SW2) on the controller PCA is set to
the positions called out in Table 5–1. Refer to Figure 5–3 for the location of
the dip switch.
•
Note that not all connectors are used on the controller PCA when reattaching
the cables. (See Figure 5–1.)
•
Switch power to the disk library back on, and set configurations 16 and 18.
(See Section 3.3.1 and Section 5.5.)
•
Cycle power off and on to allow the new configurations to take effect.
•
Refer to Section 5.4.3 to reattach the front bezel if it was removed.
5–6 Removal and Replacement
•
Refer to Section 5.4.1 to replace the access panel and top cover.
Figure 5–3 Dip Switch Location on the Controller PCA
Removal and Replacement 5–7
Table 5–1 SW2 Default Settings
Switch Number
Position
Function
1
OPEN
Clears NVRAM and security code
when ‘‘CLOSED’’.
2
OPEN
Not field usable
3
OPEN
Not field usable
4
OPEN
Not field usable
5
CLOSED
Term power
6
OPEN
Term power
7
OPEN
Term power
8
OPEN
Not field usable
5.4.3 Replacing the Front Bezel Assembly
Note
The front bezel must be removed in order to replace the following
assemblies:
•
Fan
•
Display/operation buttons
•
Drive mechanism
•
Magazine guides
•
Mailslot
•
Operation switch
1. Follow the service access procedure at the beginning of this chapter.
2. Snap off the small front access panel if necessary. (This panel only needs to
be removed if the fan is being replaced.)
a. Pull the bottom of the panel until it pops free.
5–8 Removal and Replacement
b. Slide the tabs at the top of the panel downward until the panel is released
and can be removed.
CAUTION
Hold on to the front bezel to prevent it from dropping and being damaged
while removing the front panel mounting screws.
3. Remove the two T-25 screws that secure the front bezel to the chassis. These
screws are located behind the front bezel as shown in Figure 5–4.
Figure 5–4 Front Bezel Mounting Screws
4. Pull the front bezel off far enough to enable you to disconnect the front panel
cable and the mailslot sensor cable (see Figure 5–5).
Removal and Replacement 5–9
Figure 5–5 Disconnecting the Mailslot Sensor Cable and Front Panel Cable
5.4.4 Replacing the Front Operation Switch/Cable Assembly
1. Pull off the operation button from the front of the disk library.
2. Remove the two pozidriv screws that secure the operation switch to the front
of the disk library.
3. Feed the switch through the opening in the chassis so the cable is in the
midsection of the disk library.
4. Disconnect the two power connectors from the controller PCA if they have not
already been disconnected.
5–10 Removal and Replacement
5. Disconnect the power cable from the back of the drive mechanism (located at
the front of the disk library).
6. Feed the power cable assembly through the opening in the sheetmetal bracket
that secures the magazine guides to the chassis (near the center of the disk
library).
Note
To ensure there is enough room for the large power connector to fit
through this opening, feed the power switch through first and the large
power connector last.
7. Remove the four screws that secure the power supply assembly to the disk
library rear panel.
8. Lift up the power supply far enough to release the two tabs that secure
the left side of the power supply to the rear panel. Pull the power supply
assembly away from the rear panel just far enough to allow you to disconnect
the power cable from the power supply PCA. (Set the power supply assembly
aside.)
9. Cut the four cable ties that secure the power cable assembly to the top of the
disk library chassis.
10. Feed the large power connector that was just removed from the power supply
through the opening in the shield at the back of the disk library and remove
the cable assembly.
When reassembling:
•
Feed cables through the opening in the sheetmetal at the center of the disk
library in the reverse order in which they were removed.
•
Resecure the power cable assembly to the top of the autochanger chassis
using four cable ties.
•
Refer to Figure 5–1 to reconnect cables to the controller PCA.
Removal and Replacement 5–11
5.4.5 Replacing the Fan/Display/Operation Button Assemblies
1. Follow the service access procedure at the beginning of this chapter.
2. Remove the front bezel assembly. (See Section 5.4.3.)
CAUTION
Hold your hand over the front of the display while removing the screws
that secure it to the front bezel. The display assembly will fall out of the
front bezel and could be damaged when these screws are removed.
Note
The display assembly must be removed in order to replace the fan
assembly.
3. Lay the front bezel on its side and remove the three T-15 screws that secure
the display assembly to the back of the front bezel. (See Figure 5–6.)
5–12 Removal and Replacement
Figure 5–6 Removing the Display Assembly
Note
When assembling/disassembling the display assembly, place the display
on an anti-static mat to prevent the display from being scratched.
4. Carefully disconnect the fan cable from the display PCA using a pair of
needle-nosed pliers.
5. Remove the display PCA by removing the four T-10 screws that secure it to
the display assembly.
Once the display PCA is removed, the rubber key pads can also be removed
from the display assembly and replaced if necessary.
6. Snap off the lower front section of the front bezel if it was not removed earlier
(see Section 5.4.3).
7. Remove the two T-25 screws that secure the fan grill to the front bezel.
Removal and Replacement 5–13
8. Remove the two T-20 fan mounting screws and flat washers that secure the
fan to the back side of the front bezel. Lift off the RFI shield.
9. Turn the fan counterclockwise to release the two fan tabs from the slots in
the front bezel and remove the fan.
When reassembling:
•
When replacing the fan:
Position the fan so that the cable faces toward the display assembly and
the airflow indicator faces up.
The fan cable is not routed through the fan housing or under the RFI
shield.
The bend in the grill ‘‘feet’’ face down toward the bezel.
•
When replacing the display:
Hold the display in place while reattaching it to the front bezel to avoid
damaging the display.
Reconnect the fan cable to the display PCA before attaching the display to
the front bezel.
Insert the top of the display assembly into the front bezel before inserting
the operation buttons.
Position the operation buttons in the front bezel so they do not obstruct
the hole used to attach the display to the front bezel.
Remember to replace the cable clamp (with the fan cable inserted) when
reattaching the display/RFI shield to the front bezel. Verify that this
screw/cable clamp is secured to the plastic standoff at the bottom of the
display.
•
Refer to Section 5.4.3 to reattach the front bezel.
•
Refer to Section 5.4.1 to replace the access panel and top cover.
5.4.6 Replacing the Mailslot Assembly
1. Follow the service access procedure at the beginning of this chapter.
2. Remove the front bezel assembly. (See Section 5.4.3.)
3. Remove the two T-15 mailslot mounting screws from the upper left side of the
chassis. (See Figure 5–7.)
5–14 Removal and Replacement
4. Slide the mailslot forward out of the autochanger.
Figure 5–7 Mailslot Mounting Screws
When reassembling:
•
When reinserting the mailslot into the chassis, lift up on the mailslot
assembly from inside the chassis to ensure the mailslot is seated properly on
the guides.
•
Refer to Section 5.4.3 to reattach the front bezel.
•
Refer to Section 5.4.1 to replace the access panel and top cover.
Removal and Replacement 5–15
5.4.7 Replacing the Optical Drive Mechanism
Note
The optical drive mechanism does not automatically eject a disk from the
drive if a power failure occurs. If you need to manually remove a disk
from a drive with no power, you must use the eject tool. Instructions for
using the eject tool are given in Section 4.4.
The drive mechanism does not need to be removed to remove a disk from
the drive.
1. Follow the service access procedure at the beginning of this chapter.
2. Remove the front bezel assembly. (See Section 5.4.3.)
3. Slide the picker up as far as it will go and secure it to the top of the
autochanger chassis using a T-25 screw. (See Figure 5–8.)
5–16 Removal and Replacement
Figure 5–8 Picker Service Position
4. Remove the following cables from the back side of the drive mechanism (See
Figure 5–9):
a. Power cable
b. Drive interface cable and clamp
c.
SCSI cable
Removal and Replacement 5–17
Figure 5–9 Optical Drive Mechanism Cable Connections
5. Disconnect the optical sensor cable from the interconnect PCA. (See
Figure 5–10.)
6. Remove the two T-25 screws that are located on each side of the front of the
optical drive mechanism. (See Figure 5–10.)
5–18 Removal and Replacement
Figure 5–10 Drive Mounting Screws and Optical Sensor Cable Locations
7. Slide the drive mechanism assembly out through the center of the disk library
(see Figure 5–11).
CAUTION
Be careful not to catch the optical sensor cables on the drive mechanism
while removing the drive.
Removal and Replacement 5–19
Figure 5–11 Sliding the Drive Mechanism Out of the Library
8. Remove the four T-10 screws that secure the drive to the drive plate (see
Figure 5–12).
9. If you need to replace the optical sensor, remove the T-15 screw that secures
the optical sensor to the sensor bracket (see Figure 5–12).
5–20 Removal and Replacement
Figure 5–12 Removing the Drive Plate and Optical Sensor
When reassembling:
•
Make sure the drive is positioned correctly when reattaching the drive to the
drive plate:
Position the drive mechanism in upside down in front of you so that the
front of the drive mechanism is facing toward you. Set the drive plate on
top of the drive mechanism so that the sensor is facing toward you with
the opening on the sensor facing to the right and the cables to the left.
Replace the screw in the left hole closest to you first. (Loosely tightening
this screw will cause the other holes in the drive plate to correctly align
with the holes in the drive mechanism.)
Removal and Replacement 5–21
Verify that the drive and drive plate are properly aligned and that none of
the screws are catching on the raised part of the drive plate.
•
The front of the drive mechanism faces towards the leadscrew assembly.
•
The tabs on the drive plate slide on rails at the bottom of the disk library
chassis.
•
The back of the drive mechanism must be lifted slightly after it has been
inserted into the chassis so that the notch on the drive plate fits into the slot
at the front of the chassis. (See Figure 5–11.)
•
Refer to Section 5.4.3 to reattach the front bezel.
•
Refer to Section 5.4.1 to replace the access panel and top cover.
•
Verify that the drive contains the correct firmware revision.
5.4.8 Replacing the Interconnect PCA
1. Follow the service access procedure at the beginning of this chapter.
2. Disconnect the optical sensor connector.
3. Disconnect the drive interface cable.
4. Disconnect the sensor cable from the controller PCA, if it has not already
been disconnected.
5. Remove the two T-9 screws (located closest to the drive mechanism) and
loosen the third T-9 screw that secures the interconnect PCA to the chassis
(See Figure 5–13).
6. Slide the PCA out of the library.
5–22 Removal and Replacement
Figure 5–13 Removing the Interconnect PCA
5.4.9 Replacing the Picker/Carriage Assembly
1. Follow the service access procedure at the beginning of this chapter.
2. Lay the disk library on its side.
3. Remove the T-15 screw that secures the carriage to the leadscrew assembly.
(This screw is sealed with Loctite®.)
4. Disconnect the front panel ribbon cable from controller PCA if it has not
already been removed.
5. Remove the T-25 screw that secures the carriage shaft to the top of the
autochanger chassis (see Figure 5–14).
Removal and Replacement 5–23
Figure 5–14 Removing the Carriage/Picker Assembly
6. Slide the carriage shaft out of the opening in the bottom of the library chassis
(see Figure 5–15).
5–24 Removal and Replacement
Figure 5–15 Removing the Carriage Shaft
7. Remove the picker assembly by lifting up on the side of the picker that the
carriage shaft was, and then rotating the picker to a horizontal position.
Carefully lift the picker assembly out of the chassis.
When reassembling:
•
Position the picker assembly in the autochanger before reinserting the
carriage shaft.
•
The slotted end of the carriage shaft fits into a round metal protrusion at the
top of the autochanger chassis.
•
Refer to Section 5.4.1 to replace the access panel and top cover.
Removal and Replacement 5–25
5.4.10 Replacing the Leadscrew Assembly
1. Follow the service access procedure at the beginning of this chapter.
2. Remove the T-15 screw that secures the leadscrew assembly to the carriage
/picker assembly (see Figure 5–16). (This screw is sealed with Loctite®.)
3. Rotate the end of the bracket that was attached to the carriage picker
assembly toward you, and slide the bracket up out of the way of the picker.
Figure 5–16 Removing the Leadscrew Mounting Screw
4. Slide the picker assembly up and secure it to the top of the autochanger using
a T-25 screw. (See Figure 5–17.)
5–26 Removal and Replacement
Figure 5–17 Securing the Picker to the Top of the Autochanger
5. Disconnect the power and encoder cables from the leadscrew motor using a
flatblade screwdriver. Place the screwdriver between the cable connector and
the plastic tab on the motor, and lift the screwdriver upward while pulling off
the connector.
6. Remove the two T-15 screws that secure the leadscrew base to the bottom of
the chassis (see Figure 5–18).
Note
When lifting the leadscrew assembly out of the disk library, be careful to
keep the assembly in an upright position to prevent the bearings from
falling off the top of the leadscrew.
Removal and Replacement 5–27
7. Pull on the large tab on the leadscrew base to release the tabs that secure the
base to the back of the autochanger.
8. Rotate the motor end of the base in toward the center of the autochanger and
carefully lift the base out of the autochanger.
Figure 5–18 Removing the Leadscrew Assembly
When reassembling:
(Refer to Figure 5–19 when replacing the leadscrew assembly.)
•
Verify that the bearings are positioned correctly at the top of the leadscrew.
•
Align the tabs on the leadscrew base with the slots in the autochanger chassis
and replace the two screws that secure the base to the chassis.
•
Remove the metal shipping bracket on the new leadscrew assembly (see
Figure 5–19.)
•
When you reconnect the encoder cable, the wires face upward.
5–28 Removal and Replacement
•
Refer to Section 5.4.1 to replace the access panel and top cover.
Figure 5–19 Preparing the Leadscrew Assembly for Replacement
5.4.11 Replacing the Power Supply
1. Remove power from the optical disk library. Switch off both the power switch
on the back panel and the operation switch on the front panel.
2. Unplug the power cord from the back panel.
3. Remove the four T-15 screws that secure the power supply assembly to the
disk library back panel (see Figure 5–20).
Removal and Replacement 5–29
4. The power supply is hinged on the left side (when facing the back of the
autochanger). Open the right side of the power supply far enough to
disconnect the power cable from the power supply PCA.
5. Remove the power supply assembly by lifting up the power supply until the
tabs on the power supply are released from the slots on the back panel.
Note
No further disassembly of the power supply is required. The power supply
assembly is replaced as an entire unit.
Figure 5–20 Removing the Power Supply Assembly
5–30 Removal and Replacement
When reassembling:
•
Verify that the voltage switch is set correctly and that the fuseholder contains
the correct fuse.
•
It is important that the power supply assembly is reassembled in the exact
reverse order in which it was disassembled.
5.4.12 Replacing the Magazine Guides
1. Follow the service access procedure at the beginning of this chapter.
2. Remove the front bezel assembly. (See Section 5.4.3.)
Note
Replacement part number C1708-60026 includes two magazine guides.
Both guides must be replaced even though only one guide may be
defective.
3. Remove the four T-15 screws (two per side) that secure the magazine guides
to a storage slot (see Figure 5–21).
4. Slide the magazine guides out of the disk storage slot inside the autochanger
chassis.
Removal and Replacement 5–31
Figure 5–21 Removing the Magazine Guides
When reassembling:
•
Make sure the tab on the back of each magazine guide fits into the slot in the
front of the disk library before the guides are resecured to the storage slot.
•
Refer to Section 5.4.3 to reattach the front bezel.
•
Refer to Section 5.4.1 to replace the access panel and top cover.
5–32 Removal and Replacement
5.4.13 Replacing the Internal UPS Cable
1. Follow the service access procedure at the beginning of this chapter.
2. Remove the leadscrew assembly. (See Section 5.4.10.)
3. Remove the two T-10 screws that secure the UPS cable to the inside of the
disk library back panel.
4. Pull the UPS cable out through the inside of the autochanger chassis.
5.4.14 Replacing the SCSI Cable
Note
The following assemblies must be removed prior to replacing the SCSI
cable:
•
Leadscrew assembly - see Section 5.4.10
•
Front bezel assembly - see Section 5.4.3
•
Drive assembly - see Section 5.4.7
1. Follow the service access procedure at the beginning of this chapter.
2. Remove the four T-10 screws that secure the two SCSI connectors to the disk
library back panel.
3. Release the large cable clamp at the bottom center section of the disk library
chassis.
4. Disconnect the drive interface cable from the sensor PCA.
5. Disconnect the SCSI cable from the controller PCA and feed the cable through
the slot in the sheetmetal beneath the controller PCA.
6. Pull the SCSI cable assembly out through the center of the disk library
chassis.
Removal and Replacement 5–33
5.5 Reinitializing the Autochanger Controller PCA RAM
after Service
All the RAM on the autochanger controller PCA is battery backed and is,
therefore, non-volatile. Most of the RAM is initialized to known values
at powerup. Variables that are not changed are customer configurations,
autochanger logs, autochanger odometers, element status variables, and variables
that help the autochanger recover from power failures. These variables are set by
Configs 16 and 18.
NVRAM must be reinitialized after replacing the autochanger controller PCA,
after updating or changing the autochanger controller PCA firmware, and after
adding drive mechanisms.
5.5.1 Variables Set by Configuration 16
•
SCSI address of the autochanger
•
Configurable options set to system defaults (ROM-dependent)
Whether the autochanger should report recovered errors (CONF 27)
Whether the autochanger should rotate the mailslot inwards when in
secure mode (CONF 31)
Whether the autochanger should automatically initialize element status
when cartridges are found in unexpected places (ROM-dependent)
•
Drive status variables
Reported SCSI address of the drive set to system defaults
Clear the source of the disk in the drive
•
RS-232 configuration set to system defaults
Baud rate = 19,200
Word length = 8
Start/stop bits = 1
Parity = none
•
Power fail variables
Whether the last move was started is set to FALSE
Clear the state of the last move
5–34 Removal and Replacement
•
Recovery restore variables set to to system defaults
Maximum number of Find Home retries = 3
Maximum number of error recovery retries = 3
Maximum number of restore retries = 1
•
Security variables
Clear Unit Reserved
Clear Prevent Media Removal for each SCSI ID
•
Element Status variables
Clear exception bits
Clear element reservations
•
Clear autochanger logs
Clear Error Log (INFO 0)
Clear Move Success Log (INFO 10)
Clear Recovery Log
Clear Runtime Log (INFO 11)
Clear number of major retries
Clear number of inline retries
•
Clear magazine and mailslot offsets (unused in most units - invalid in RSE
units)
•
Reset the password to 0,0,0
5.5.2 Variables Set by Configuration 18
•
Reset the move odometer to zero (INFO 9)
•
Reset the flip odometer to zero (INFO 12)
•
Reset the translate odometer to zero (INFO 13)
•
Reset the mailslot rotation odometer to zero (INFO 14)
•
Reset the number of power-on hours to zero (INFO 5)
•
Reset the number of loads to each drive to zero (INFO 4)
Removal and Replacement 5–35
5.6 Replaceable Parts
5.6.1 Recommended Service Kit
The initial recommended service kit for the optical disk library includes the
exchange parts list and the non-exchange parts list for stocking atlogistics. Refer
to Figure 5–22, Figure 5–23, and Figure 5–24 for exploded views of optical disk
library with FRU numbers.
Note
The ‘‘x’’ in the part numbers listed below represents a number from ‘‘0’’
to ‘‘9’’ depending on the revision of the part. For example, if the part is
newly released, the number will be ‘‘0’’. The first time the part is revised,
the number will be incremented to a ‘‘1’’; the second time the part is
revised, the number will be incremented to a ‘‘2’’, and so on.
If you are unsure of the current part number, check your parts database
for part number information.
Table 5–2 Exchange Assemblies
FRU No.
HP Part
Number
Description
Digital Part Number
1
C170866x01‡
Autochanger Controller PCA
29-30856-01
1†
5063-2711
Autochanger Controller PCA
with code
29-30856-01
20
C1716Copt728
Optical Drive Mechanism
(650-Mbyte)
29-30871-01
20
C1716Topt728
Optical Drive Mechanism
(1.3-Gbyte)
29-31453-01
20†
5063-2701
Optical Drive Mechanism with
code (650-Mbyte)
29-30871-01
20†
5063-2715
Optical Drive Mechanism with
code (1.3-Gbyte)
29-31453-01
†Always order exchange version with code installed.
‡HP Part numbers containing a 66 as in C1708-66503 are silk screened on the boards, but these
translate to order numbers containing a 60 or 69 as in C1708-69x01 The 60 or 69 numbers are on the
outside of the box that the board is shipped in.
(continued on next page)
5–36 Removal and Replacement
Table 5–2 (Cont.) Exchange Assemblies
FRU No.
1
25,27,40
HP Part
Number
Description
Digital Part Number
C1708-60x40
Carriage/Picker Assembly
29-30860-01
1 These
FRUs have been combined into a single replaceable part. If any one of the listed FRU numbers
needs to be replaced, reorder the part number for the entire assembly.
Table 5–3 Non-exchange Assemblies
FRU No.
HP Part
Number
Description
Digital Part Number
4
C1708-60x02
Interconnect PCA
29-30857-01
9
C1708-60x08
SCSI S/E Repeater
29-30874-01
9
C1708-60x09
SCSI Diff. Converter
29-30873-01
22
C1708-60x05
Front Panel PCA
†
23, 321
C1708-60x32
Leadscrew Assy
29-30863-01
26
C1708-60x26
Magazine Guides (2)
NA
28
C1708-60x28
Power Supply
29-30858-01
29
C1708-60x29
Mailslot w/Sensors
29-30859-01
30
C1700-60x30
Optical Sensor w/Cable
†
41
C1708-60x41
Carriage/Picker Flex Cbl
†
42
C1708-60x42
Carriage Rod
29-30861-01
47
C1708-60x47
Drive Tray
†
48
C1708-60x48
Fan
29-30862-01
51
C1708-60x51
Module Power Cable
†
53
C1708-60x53
Drive Interface Cable
†
54
C1708-60x54
UPS Cable
†
58
C1708-60x58
Carriage Mtr Encoder Cbl
†
1 These
FRUs have been combined into a single replaceable part. If any one of the listed FRU numbers
needs to be replaced, reorder the part number for the entire assembly.
†These parts are not stocked by Digital. Digital Logistics can place P1 orders for these parts directly
to Hewlett-Packard.
(continued on next page)
Removal and Replacement 5–37
Table 5–3 (Cont.) Non-exchange Assemblies
FRU No.
HP Part
Number
Description
Digital Part Number
59
C1708-60x59
SCSI I/O Cable Loop
†
65
C1708-60x65
Front Panel Cable
†
66
C1708-60x66
Interconnect/Controller Cbl
†
75
C1708-60x75
RFI Shield
†
76
C1708-60x76
Key Pads (dove gray)
†
76
C1718-60x76
Key Pads (black)
†
77
C1708-60x77
Display Window (dove gray)
†
78
C1708-60x78
Vent Cover (dove gray)
†
79
C1708-60x79
Front Bezel (dove gray)
†
82
C1708-60x82
Power Button
†
83
C1708-60x83
Carriage Shield
†
84
C1708-60x84
Enclosure
†
C1708-60x85
Front Bezel
†
Fan Grill
3160-0444
†
Light Pipe
C1708-48308
†
Access Panel
C1708-00604
†
†These parts are not stocked by Digital. Digital Logistics can place P1 orders for these parts directly
to Hewlett-Packard.
5–38 Removal and Replacement
Figure 5–22 Optical Disk Library Exploded View (Sheet 1 of 3)
Removal and Replacement 5–39
Figure 5–23 Optical Disk Library Exploded View (Sheet 2 of 3)
5–40 Removal and Replacement
Figure 5–24 Optical Disk Library Exploded View (Sheet 3 of 3)
Removal and Replacement 5–41
6
Theory of Operation
This chapter discusses the following aspects of the RW504/RW524 optical disk
library:
•
Autochanger
Command execution
Mechanics
•
Autochanger controller PCA
•
Power supply
•
Optical disk drive
In addition, autochanger error detection, diagnostic strategy, and the SCSI
interface and command set are discussed.
6.1 The Autochanger
6.1.1 Movements
The mechanism code of the autochanger accepts high-level SCSI commands from
the interface, translates these commands into servo code for the autochanger,
executes the command, and reports status.
When a SCSI command is received, it is translated into a series of smaller
submoves in the servo code of the autochanger and executed.
Theory of Operation 6–1
Figure 6–1 SCSI Command Translation for Autochanger Operation
ID
Macro−move
Micro−move ID
Micro−move ID
Micro−move ID
ID
Macro−move
SCSI Command
Micro−move ID
Macro−move
Mechanism
Code
Profile
Micro−move ID
Micro−move ID
ID
Profile
Micro−move ID
Profile
Profile
Micro−move ID
Micro−move ID
Examples of high-level commands are:
•
Move/Exchange—move a cartridge from element A to element B.
•
Seek—position the transport at a target element
•
Test—test for the presence of a cartridge at a target element
•
Actuate mailslot—rotate the mailslot assembly to perform I/O with the user
The commands are translated into a series of moves which are basic autochanger
functions. These submoves are called macro-moves. In this library the macromoves are as follows.
•
Move carriage—position the picker transport to a position along the rails.
•
Flip—rotate the picker
•
Cartridge I/O—plunge and retrieve the picker finger assembly to move
cartridges between the picker and magazines, drives, or the mailslot.
•
Rotate mailslot—plunge and retrieve the picker finger assembly/leadscrew
nut to rotate the mailslot assembly toward and away from the user.
For example. ‘‘Move element 11 to element 2 with flip’’ is transformed into the
following sequence of autochanger functions.
1. Determine that element 11 is a storage slot and element 2 is a drive.
6–2 Theory of Operation
2. Move the picker to the front of the storage element.
3. Get the cartridge from the storage element.
4. Do a flip.
5. Move the picker to the front of the disk insertion slot on the drive element.
6. Put the cartridge into the drive element.
The basic autochanger functions (macro-moves) are then divided into a series of
smaller movements called ‘‘micro-moves.’’ There are two types of micro-moves:
•
Position move—move the driving motors a given distance at peak speed
•
Saturation move—same as a position move except that a high force is
expected within a given distance; however, motion is halted if force exceeds a
specified threshold.
Position moves are used for high-speed, unobstructed movements of a known
distance. Saturation moves are used in low-speed, adaptive movements of
variable distance.
Macro-moves consists of one or more combinations of position or saturation type
micro-moves. Each macro-move has a tailored set of these submoves to insure
that the macro-move will be gentle. As a macro-move is executed, servo gains are
adjusted to allow for changes in load characteristics.
An example of the process for a flip is as follows.
1. Move picker finger assembly backwards a fixed distance to engage the flip
lock.
2. Change the gain to prepare for upcoming flip.
3. Move the picker finger assembly backwards a fixed distance to trip the
mechanism and start the flip.
4. Make sure the flip is completed by doing a saturate on the picker motor until
the force exceeds a fixed threshold.
5. Change the gain to prepare for picker finger assembly movement.
6. Move the picker finger assembly forward to relieve the force.
Each micro-move within a specific macro-move has a unique set of stability,
performance, error recovery, force, and reliability criteria. Therefore, each micromove is assigned a unique identification code (ID) which is used to determine how
the move should be performed. Before a micro-move is executed, its ID is used
to fetch acceleration, velocity and force limits to use. If the move fails, its ID
Theory of Operation 6–3
determines the type of error recovery scheme to employ. This tailored technique
provides gentle, stable control of the mechanism, resulting in increased reliability.
6.1.2 Mechanics
The mechanics consist of the following major assemblies:
•
Leadscrew assembly
•
Picker/carriage assembly
•
Mailslot (disk loading and ejecting assembly)
The picker/carriage assembly is the heart of the mechanism. This assembly
positions disks in front of storage slots, drives, and the mailslot. The picker
inserts, removes, and flips disks. It also activates the mailslot mechanism.
The carriage/picker assembly includes active payload electronics that are similar
in design to a plotter’s. A single-axis plunge is used since the picker does not need
to travel horizontally (translate). The picker electronics include the picker motor
with a ribbon cable connecting the motor to the carriage and the autochanger
controller PCA.
The disk insertion slot, referred to as the mailslot, accepts a disk (inserted
shutter-end-first) and rotates the disk 180 degrees. This allows the picker to
grasp the rear of the disk and insert the disk shutter-end-first into the drive or a
storage slot.
The carriage motor rotates the carriage leadscrew, driving the carriage. The
motor also monitors the amount of movement with a built-in encoder wheel.
6.2 The Autochanger Controller PCA
The autochanger controller PCA contains the following major components:
•
Microprocessor
•
Motor Control Chip (MCC - Interface between the processor and Pulse Width
Modulation)
•
SPIFI Chip (SCSI bus control)
•
ROM
•
RAM
•
Pulse Width Modulation Amplifier
•
Front Panel Control and Filament Drive
•
SCSI Interface
6–4 Theory of Operation
•
Multifunction Peripheral Chip
Figure 6–2 Autochanger Controller PCA Block Diagram
The MICROPROCESSOR is a Motorola 68000 running at 12 MHz. This
microprocessor controls all processes on the controller PCA such as servos, SCSI
interface, and commands to the control panel.
Associated with the microprocessor is clocking circuitry, battery-backed-up RAM,
decoding logic, and ROM.
The MOTOR CONTROL CHIP (MCC) is the interface between the 68000
processor and the motors. The MCC reads the position encoders via Schmitt
triggers and uses that information to increment or decrement counters on the
chip. The MCC also provides Pulse Width Modulation (PWM) output signals to
drive the motor circuitry.
The SPIFI chip handles the SCSI protocol of the SCSI interface.
Theory of Operation 6–5
ROM. The controller firmware resides in two FLASH ROMs. These FLASH
ROMs allow new firmware versions to be downloaded into ROM in the field.
RAM. The two RAM chips are special, low-power CMOS static RAMs. A standby
battery on the PCA takes over powering these chips if main power is lost. The
chips remain in standby mode, providing a nonvolatile memory storage capability
when the unit is powered off.
The PULSE WIDTH MODULATION (PWM) amplifier takes the signals from
the MCC changes them into voltages form the picker motor and carriage motor.
Motor speed control is by feedback from the picker and carriage motors through Z
and Y encoders back to the MCC.
The vacuum filament display uses a 7.5-volt supply tied to a 5-volt reference
resulting in an exitation voltage of from two to three volts. The grids of the
display are at approximately 20 volts.
The SCSI INTERFACE is the SPIFI chip. All SCSI protocol is handled by the
SPIFI under control of the main 68000 processor.
The MULTIFUNCTION PERIPHERAL chip controls interrupts, RS-232
functions, and certain timers throughout the controller PCA.
The SERVO, I/O, and SENSORS circuitry handle the servo communications (e.g.
shutdown control), I/O communications (e.g. drive eject and drive busy), and
sensor communications (e.g. mailslot sensor and vertical calibration sensor).
6–6 Theory of Operation
6.3 The Power Supply
The power supply is a switching supply that provides +5V at 5.6 amperes, +12V
at 0.5 amperes, +12V at 2.7 amperes, and -12V at 0.6 amperes. The supply also
provides the drive power-on reset signal.
The AC line voltage is connected to the power supply through a line cord
receptacle mounted on the power supply PCA. A PCA-mounted power on/off
switch controls both sides of the AC line. The one hot side of the AC line is fused
in the 115 VAC setting. Note that both sides may be hot in the 230 VAC setting.
The fuse rating for both 115 VAC and 230 VAC is 3 amperes (the fuse and fuse
holder cap lengths are different). An input line filter is provided to reduce the
level of AC line transients and the amount of switching noise leaving the supply.
For additional protection, an over-voltage protection device is enabled while in the
115 VAC position in the event that 230 volts in inadvertently connected (a blown
fuse is the only damage that would occur). A diode array and several capacitors
rectify and filter the incoming AC. Included are two thermistors that limit the
initial power-on surge current to approximately 25 amperes peak at both voltage
settings.
The power-on (PVAL-H) reset signal, which is used to control wake-up and
shut-down operations in the drive, is activated by the +5V output. At power-on,
PVAL-H remains high for at least 100 milliseconds after the +5V output reaches
4.75 volts or higher. PVAL-H goes high (shutting the drive down for protection)
500 milliseconds before +5V goes below 4.75 volts.
Theory of Operation 6–7
6.4 The Multifunction Optical Drive and Drive Controller
There are four major subassemblies within the optical drive: the controller PCA,
servo PCA, loader mechanism, and the optical head (Figure 6–3).
Figure 6–3 Functional Diagram
6.4.1 Controller PCA
The controller PCA is a microprocessor-based collection of digital electronics that
handles functions performed by a SCSI controller, a data buffer, and a formatter
/sequencer.
6–8 Theory of Operation
6.4.1.1 SCSI Controller
The SCSI controller provides the SCSI interface connection to the host computer.
This interface consists of both the electrical signals and the firmware which
decodes the various commands and messages on the SCSI bus and instructs the
drive to take appropriate action.
6.4.1.2 Data Buffer
The 256-Kbyte data buffer and associated control electronics provide a buffer to
speed match transfers to and from the host computer and the optical disk. The
data buffer provides a cache for read and write operations, optimizing the speed
of these transfers.
6.4.1.3 Formatter/Sequencer
The formatter/sequencer function formats and decodes data for read and write
transfers. During a write function user data is sent via the SCSI bus as bytes (8
bits each). The formatter converts these 8 bits of parallel data into an encoded
serial bit stream that includes all the format and error correction features
required to meet the ANSI and ISO specifications. During reads, the decoder
converts the serial data stream, which includes format and error correction
features, into parallel data.
6.4.2 Servo PCA
The servo PCA includes a digital signal processor (DSP) that controls the actions
of the many servo loops that interact with the optical head and the loader
assembly.
6.4.2.1 DSP Microprocessor and Support/Servo Control Loops
Most of the electronics on the servo PCA is analog circuitry. This circuitry is
designed into the control loops of the following servos: spindle motor/speed,
laser power control, track following, seek/position maintenance, focus actuation,
fine position actuation, and coarse position actuation. Whenever the drive is
performing a read or write operation, all these servos are activated.
Also on the servo PCA are control electronics for the loader assembly. Included
are drivers for the loader and spindle (speed control) motors, sensor circuitry
for the cartridge loaded and write protect detectors, LED drivers for the front
panel LEDs, and control circuitry for the bias magnet subassembly of the loader
mechanism.
Theory of Operation 6–9
6.4.2.2 Read and Write Channel Electronics
Read channel electronics take analog data from the optical head and convert it
into digital ‘‘transitions.’’ These transitions are decoded by the decoder electronics
on the controller PCA in order to extract data from format and error correction
features. The write channel electronics take the serial data stream from the
formatter/sequencer and convert the digital pulses into analog data. This analog
data is then sent to the optical head.
6.4.3 Mechanism Assembly
6.4.3.1 Loader Mechanism
The loader mechanism consists of two motors: a spindle motor for speed control
and a loader motor for loading and unloading of the cartridge. The loader motor
includes a gear train and rack-and-pinion system that allow the cartridge shuttle
to raise and lower the cartridge within the loader housing. The bias magnet
subassembly sits on top of the cartridge shuttle and provides the correct polarity
for erasing or writing data.
6.4.3.2 Optical Head
A major feature of the optical head is a ‘‘split optics’’ design. This design
physically separates the laser diode and its associated detectors from the focus
/fine position actuators. This design results in a significant seek time performance
advantage due to less mass on the moving portion of the optical head.
There are several actuators in the optical head. The coarse position actuator
moves the focus/fine position actuators to the vicinity of the desired sector on the
optical disk. The fine actuator makes small corrections (+/-25 tracks) to center the
optical head on the desired sector. The focus actuator then moves up and down to
provide optimal focus on the light beam. All these actuators, and the laser diode
(and its detectors) are controlled by the servo PCA.
The laser diode and its associated detectors are part of a flex circuit on the optical
head assembly. On this flex circuit are analog electronics which further condition
the control signals for the laser diode, and preamplifiers for the servo and data
control signals that are returned to the servo PCA.
6.5 Optical Disk Layout and Error Correction
Two optical disk formats are available. Optical Drives in the RW504/RW524 can
read from and write to 650-Mbyte optical disks. The RW524 optical drive can
read from and write to both 650-Mbyte and 1.3-Gbyte optical disks. The target’s
role is to manage the 130mm multifunctional drive and disk as an optical memory
device through its SCSI interface. These optical drives support 130mm rewritable
optical disks conforming to ISO/IEC 10089 Format A, and write-once optical
disks conforming to ISO/IEC DIS 11560, for 650-Mbyte capacity. The RW524 also
6–10 Theory of Operation
supports the ECMA 184 standard for 1.3-Gbyte capacity, both rewritable and
write-once.
The following sections outline disk layout for both 650-Mbyte and 1.3-Gbyte
optical disks. Throughout this section, the sector number is that of a
1024 bytes/sector disk. The value of a 512-bytes/sector disk is written inside
parentheses just after the value for the 1024 bytes/sector disk.
6.5.1 Optical Disk Layout—650-Mbyte Capacity
This section highlights some of the aspects of an optical disk as outlined by the
ISO standard DIS 10089A and ISO/IEC DIS 11560.
There are three recording styles used on the optical disk that correspond to three
specified areas on the disk:
•
Phase encoded part (PEP)
•
Standard formatted part (SFP)
•
User zone
Both the PEP and SFP are areas that have been ‘‘recorded’’ by the media
manufacturer and cannot be altered by a drive. They contain information that
the drive uses to best read and write to the optical disk. Consult the ISO
standard for more information.
6.5.2 User Zone Layout—650-Mbyte Capacity
The User Zone consists of Defect Management Areas (DMAs), a User Area and
a Slipping Area. The DMAs contain information on the organization of the User
Area into User Groups and Spare Groups. The DMAs also contain a Primary
Defect List (PDL) and a Secondary Defect List (SDL) that provide information
on the locations of defects. The drive uses this information to perform defect
management.
Although the User Zone consists of tracks and sectors, it is often easier to think
of it in terms of a large memory space of consecutive sectors. Figure 6–5 shows
the following parts of the User Zone for 650-Mbyte media.
1. Four Defect Management Areas (DMAs) that each consist of:
Disk Definition Structure (DDS)
Primary Defect List (PDL)
Secondary Defect List (SDL)
2. Slipping Area
Theory of Operation 6–11
Figure 6–4 Optical Disk Layout
3. User Area that consists of:
g User Groups, of n sectors each
g Spare Groups, of m sectors each
6–12 Theory of Operation
Figure 6–5 User Zone Layout for 650-Mbyte Media
Track 0 DDS1
PDL and SDL 1
DMAs 1 and 2
DDS2
PDL and SDL 2
1 Sector Reserved
3
User Group 0
(n Sectors)
Spare Group 0 (m Sectors)
User Area
User Group g−1
(n Sectors)
Spare Group g−1 (m Sectors)
Slipping Area (2048 Sectors)
18748 DDS3
PDL and SDL 3
DDS4
18750
PDL and SDL 4
C1716C Defaults:
g=1
m=2048
DMAs 3 and 4
1 Sector Reserved
n=314569 (576999)
Theory of Operation 6–13
6.5.3 Optical Disk Layout—1.3-Gbyte Capacity
This section highlights some of the aspects of 1.3-Gbyte Capacity optical disks as
outlined by ECMA 184.
The disk is divided into various zones, similar to the 650-Mbyte capacity. See
Figure 6–4. In addition to the User Zone, where user data is stored, there are
other zones including the PEP and SFP zones. Both the PEP and SFP contain
information prerecorded by the media manufacturer and cannot be altered by
a drive. They contain information about media parameters that the drive uses
to read from and write to the optical disk. Consult the ISO standard for more
information.
6.5.4 User Zone Layout—1.3-Gbyte Capacity
The User Zone consists of Defect Management Area (DMAs), and User Area. The
DMAs contain information about the organization of the User Area into User
Groups and Spare Groups. The DMAs also contain a Primary Defect List (PDL)
and a Secondary Defect List (SDL) that provide information on the locations of
defects. The drive uses this information to perform defect management.
Although the User Zone consists of tracks and sectors, it is often easier to think
of it in terms of a large memory space of consecutive sectors. Figure 6–6 shows
the following parts of the User Zone for 1.3-Gbyte media.
1. Four Defect Management Areas (DMAs) each consisting of a
•
Disk Definition Structure (DDS)
•
Primary Defect List (PDL)
•
Secondary Defect List (SDL)
2. Slipping Area
3. User Area consisting of
•
g User Groups, of n sectors each
•
g Spare Groups, of m sectors each
Note
g = 1 or 16
Figure 6–6 and Figure 6–7 show the User Zone Layout for 1.3-Gbyte, for both
g=1 and g=16, respectively. It is important to note one significant difference
between 650-Mbyte and 1.3-Gbyte media. Both types of media can contain
multiple groups, however the start of each group on 650-Mbyte media can ‘‘slip
out’’ with any slip spares found prior to that group. 1.3-Gbyte media establishes
6–14 Theory of Operation
groups BEFORE accounting for slip spares. (Please refer to Section 6.5.5 for more
details.
Figure 6–6 User Zone Layout for 1.3-Gbyte Media, g=1
Track 0
DDS 1
PDL and SDL 1
DDS 2
PDL and SDL 2
Track 3
DMAs
1 and 2
1 Sector
Reserved
Data Group 0
(n Sectors)
User
Area
Spare Group 0
(m Sectors)
Track 37596
Track 37597 DDS 3
Track 37599
PDL and SDL 3
DDS 4
PDL and SDL 4
DMAs
3 and 4
1 Sector
Reserved
M−2264−2
Theory of Operation 6–15
Figure 6–7 User Zone Layout for 1.3-Gbyte,g=16
Track 0
DDS 1
Track 1
PDL and SDL 1
DDS 2
Track 2
PDL and SDL 2
Track 3
Data Group 0
(n0 Sectors)
Spare Group 0
(m0 Sectors)
Track 1599
Track 1600
Data Group 1
(n1 Sectors)
Spare Group 1
(m1 Sectors)
Track 3299
Track 34500
Data Group 15
(n1 Sectors)
Spare Group 15
(m1 Sectors)
Track 37596
Track 37597
DDS 3
Track 37598
Track 37599
PDL and SDL 3
DDS 4
PDL and SDL 4
M−2264−1
6–16 Theory of Operation
Table 6–1 shows the values for n and m for 1.3-Gbyte with g=16 (1024 media).
Table 6–1 Values for n and m for 1.3-Gbyte with g=16 (1024 media)
Band
n
m
Data Band 0
27064
85
Data Band 1
28815
85
Data Band 2
30498
102
Data Band 3
32198
102
Data Band 4
33898
102
Data Band 5
35581
119
Data Band 6
37281
119
Data Band 7
38981
119
Data Band 8
40664
136
Data Band 9
42364
136
Data Band 10
44064
136
Data Band 11
45747
153
Data Band 12
47447
153
Data Band 13
49147
153
Data Band 14
50830
170
Data Band 15
52462
187
The format of 1.3-Gbyte media is often referred to as a ‘‘sliding sector’’ format.
This means that logical tracks do not necessarily align with physical revolutions.
Table 6–2 details the physical revolution to logical track layout for 1.3-Gbyte
media.
Table 6–2 Physical Revolution to Logical Track Layout
Zone or Band
Physical Revolution Range
Logical Track Range
Inner SFP
(-369,-161)
(-369,-161)
Inner Mfg
(-128,-33)
(-128,-33)
Data Band 0
(0,1349)
(0,1599)
Data Band 1
(1350,2699)
(1600,3299)
(continued on next page)
Theory of Operation 6–17
Table 6–2 (Cont.) Physical Revolution to Logical Track Layout
Zone or Band
Physical Revolution Range
Logical Track Range
Data Band 2
(2700,4049)
(3300,5099)
Data Band 3
(4050,5399)
(5100,6999)
Data Band 4
(5400,6749)
(7000,8999)
Data Band 5
(6750,8099)
(9000,11099)
Data Band 6
(8100,9449)
(11100,13299)
Data Band 7
(9450,10799)
(13300,15599)
Data Band 8
(10800,12149)
(15600,17999)
Data Band 9
(12150,13499)
(18000,20499)
Data Band 10
(13500,14849)
(20500,23099)
Data Band 11
(14850,16199)
(23100,25799)
Data Band 12
(16200,17549)
(25800,28599)
Data Band 13
(17550,18899)
(28600,31499)
Data Band 14
(18900,20249)
(31500,34499)
Data Band 15
(20250,21599)
(34500,37599)
Outer Mfg
(21600,22949)
(37600,37785)
Outer SFP
(22950,24299)
(37786,38046)
6.5.5 Drive Defect Management
The optical drive mechanism supports the defect management scheme specified
by ISO 10089A and ISO DIS 11560, and ECMA 184.
Each DMA consists of a:
•
Disk definition structure (DDS)
•
Primary defect list (PDL)
•
Secondary defect list (SDL).
6–18 Theory of Operation
The DDS contains information on how the disk is organized into user and spare
groups. There are three important parameters; the variables g, n, and m are used
in the ISO standard, and are here for consistency:
•
g - number of groups
•
n - number of sectors in a user group
•
m - number of sectors in a spare group
User data is stored initially in the sectors of the user group, while the spare
groups are reserved sectors for the linear replacement sparing algorithm. The
values of g, n, and m are generally chosen so that they maximize the number of
spare sectors allowed, and maximize the size of the user area. (The ISO standard
for 650-Mbyte media allows for a maximum of 2048 spare sectors total from the
PDL and th SDL, while the ECMA standard for 1.3-Gbyte allows for 2057 or
1077, depending on the sector size of 1024 or 512 bytes per sector respectively.)
For 1.3-Gbyte the value for g must be 1 or 16.
In general for 650-Mbyte: g * (n + m) <= (size of User Area)
In general for 1.3-Gbyte: g = 1 or 16, (n, m or n0 thru n15 and m0 thru m15 are
predefined based on g).
For more details consult the ISO or ECMA standard.
The PDL contains a list of defective sectors determined by the manufacturer or
by a certification of the User Area, i.e. during a SCSI Format Unit Command.
Defective sectors in the PDL are managed according to the slip sparing algorithm
described in this chapter.
The SDL contains a list of defective sectors and corresponding replacement
sectors determined during disk use, after certification. Defect/replacement
entries in the SDL are managed according to the replacement sparing algorithm
described in this chapter.
The Slipping Area is a portion of the user zone used by the slip sparing algorithm.
Defects found during certification are excluded from use. The user accessible
space is slipped by a corresponding number of sectors into the slip area. This
area is large enough to account for a maximum of 2048 slip spares. Any unused
sectors in the slipping area are unavailable for user data.
Note
The slipping area applies only to 650-Mbyte media.
Theory of Operation 6–19
6.5.6 Slip Sparing Algorithm
The slip sparing algorithm maps logical blocks to physical blocks to avoid
defective sectors found during a certification process. The list of defective sectors
is maintained in the Primary Defect List (PDL). During an address translation,
the logical blocks are ‘‘slipped’’ past any defective sectors, thus the name ‘‘slip
sparing.’’ As an example, say there are defective sectors at block addresses 20
and 30, and you want the physical address of logical block 40. Since addresses
20 and 30 are defective they should be slipped past, so logical block address 20 is
now physical block address 21, and logical block address 30 is now physical block
address 32, taking into account both physical blocks 20 and 30 being slipped past.
This would result in physical block address 42 being the translation for logical
block address 40.
Note that this is not a truly accurate example for three reasons:
1. PDL entries are given in track/sector form, not as block addresses. The final
translated address must also be in track/sector form.
2. There is a 3-track offset added to the physical block address, 51 sectors for
1024 bytes/sector media and 93 sectors for 512 bytes/sector media.
3. This example does not take into account the effects of Spare Groups preceding
this sector. The User and Spare Groups are determined after slip sparing, in
a type of intermediate block addressing.
Slip sparing is always the first step of address translation for 130 mm optical
disks, followed by User and Spare Grouping, and replacement sparing. The data
structures for slip sparing and User and Spare Grouping (the PDL and DDS
respectively) are created or updated only during a certification/format process,
such as during a SCSI Format Unit Command. After certification, any additional
defect management updating is done through the replacement sparing algorithm.
6.5.7 Replacement Sparing Algorithm
Once a disk has been certified and is being used by a customer, additional
defective sectors may develop. The replacement sparing algorithm is intended to
manage these defective sectors.
As was mentioned earlier, the DDS allows for a number of sectors to be reserved
for future use by the replacement sparing algorithm. These ‘‘spare sectors’’ reside
in the Spare Groups, and are referred to via entries in the SDL. Each SDL entry
consists of a defect and its replacement pair. The defect is always a sector in
a User Group, and the replacement is a sector from a Spare Group. Both are
given in track/sector form. The SDL can contain up to 2048 entries. Again, the
maximum number of total defective sectors in the PDL and SDL combined is
2048.
6–20 Theory of Operation
During normal address translation, after the original physical address is found
via the slip sparing algorithm, the SDL is checked to see if that physical address
was ’spared’ through the replacement sparing algorithm. If so, the replacement
physical address is substituted for the original physical address.
In the event a sector needs to be replaced, i.e. due to a Reassign Blocks Command
or automatic reallocation during a write command, a new defect/replacement pair
will be added to the SDL (if the new defects not already in the SDL) or an
existing defect/replace will be updated (if the new defect is already in the SDL).
6.5.8 Error Thresholds
Although not directly related to disk format, the various error thresholds are the
basis for deciding whether or not to spare a sector. This could happen during the
certification process (i.e. the slip sparing algorithm) or auto-reallocation during
a SCSI Write command (i.e. the replacement sparing algorithm). These error
thresholds are related to the format of a sector in the user zone.
Each sector in the user zone consists of a header, user data, and error correction
information. The first error threshold of importance involves information in the
sector header. Each header consists of three copies of the sector’s track number,
sector number, and a Cyclic Redundancy Check (CRC). The number of these
‘‘sector IDs’’ is used as an error threshold.
The other error threshold of interest involves information about error correction.
The error correction information that follows the data is often referred to as ECC
(Error Correction Code) data. This data is a compact way to encrypt information
about the original data written to the disk. With this information a drive can
correct up to 8 bytes per data interleave in the User Data of a sector. (Consult
the ISO standard for more details.) The actual number of bytes per interleave
requiring correction is used as an error threshold. Table 6–3 shows the error
thresholds for the optical drive. The sector IDs column refers to the minimum
number of sector IDs that must be read correctly for the corresponding operation
to be deemed successful. The ECC level column refers to the maximum number
of bytes per interleave that require correction in order for the corresponding
operation to be deemed successful.
Theory of Operation 6–21
Table 6–3 Error Thresholds
Operation
Sector IDs
ECC Level
Format
2
3
Write
2
-
Erase
2
-
Verify
2
4
Read (Recovered)
1
7
Read
1
8
6.6 Error Detection and Recovery
Refer to Figure 6–8 during the discussion in the next two sections.
Figure 6–8 Error Detection and Recovery
6–22 Theory of Operation
6.6.1 Error Detection
The autochanger error detection methods are extensive. Both processes and
sensors detect errors.
Each of the processes that detect errors are interrelated. Depending on the error
condition, the autochanger expects feedback from one or more of the following
processes before a diagnosis is made:
•
Overforce shutdown
•
Sense of touch
•
Motor position
An overforce shutdown occurs when the motors exert more force than is expected
or required. If this occurs, the servo automatically shuts itself down to prevent
parts damage. After an overforce shutdown occurs, the autochanger analyzes the
situation, self-calibrates, and attempts a retry.
Sense of touch is the process where actual force used is compared to the
recommended force for each move. The autochanger uses this information
to detect errors or qualify moves. The difference between sense of touch and
overforce shutdown is that the servo is not automatically shut down if sense of
touch detects an error.
The positions of the motors are continuously monitored by the controller PCA.
The position, along with the sense of touch feedback, is a valuable source of error
detection.
These processes also combine to detect errors. For example, the sense of touch
and the motor position processes continuously monitor the motor position and
motor force levels to sense whether a potential error has occurred. It does not
imply a sensing of complete force profiles, but the ability to continuously sample
the force profile.
The physical parts of the error detection system are the sensors. These hardwired sensors provide information that is impossible to determine through other
means. This feedback information is fed to the autochanger controller PCA.
There are two forms of sensors:
•
Drive handshake - the drive provides a ‘‘BUSY’’ signal back to the
autochanger controller to indicate the status of certain loader operations.
•
Optical sensors - detect conditions that are otherwise difficult to detect and
are used to calibrate the unit. There are two mailslot sensors to detect if a
cartridge is properly inserted into the mailslot, and a sensor for detecting
Theory of Operation 6–23
which side of the picker faces the mailslot-end of the chassis and allow
calibration of the picker’s position in relation to the drive and storage slots.
6.6.2 Error Recovery Processes
The autochanger uses the following processes to recover from errors:
•
Inline recovery
•
Find home sequence
•
Calibrate
For certain well-defined error conditions, recovery operations that have little
effect on position or performance of the autochanger are executed inline. These
are used only if the error condition can be determined exactly, and in cases where
further motion may make recovery difficult.
The purpose of FIND HOME is to initialize the machine to a known state. For
power-on, this means finding a ‘‘home’’ (zero) position for the carriage/picker
assembly.
The calibrate procedure is then called to further locate reference points other
than the zero locations found during FIND HOME. Using sensors, the picker
is characterized as to its relationship with the mechanism. The positions of
the drive, mailslot, and storage slots are calculated based on the location of the
sensors.
For recovery after power-on, many subsets of FIND HOME may be called. One
mode, for example, only determines which side of the picker faces the mailslot-end
of the chassis. If any of the subsets of FIND HOME fail, the full FIND HOME
sequence is run. A successful running of FIND HOME gives the autochanger
code the exact positions of each end of the carriage rail and the rear plane of the
picker assembly. Also, the autochanger then knows which side of the picker is
facing the mailslot-end of the chassis and whether the picker holds a disk or not.
6.6.3 SCSI Detected Errors
For the vast majority of potential error conditions that may exist, the SCSI
interface retrieves immediate information about the error with no motion
required. Potential error conditions include:
•
Machine not being ready for a new command due to another previously-issued
command or a previously-detected hardware fault that prevents motion
•
Illegal request to move a cartridge from an empty location or to a full location
•
Illegal request to do an unsupported command or operation
•
Invalid syntax or parameters in a command
6–24 Theory of Operation
•
Various bus-level communication errors
In all of these cases, the command is rejected immediately and the autochanger is
not moved.
6.6.4 Move Errors
If an error is detected during an autochanger motion, the state of the machine
is recorded in internal memory and a retry procedure is called. Errors of this
type may be either physical or logical, and may be recoverable or unrec overable.
Results of the error recovery are returned to the host when the command
completes. If possible, the cartridge is returned to its original location before
command completion, putting the autochanger back into its original state.
Logical errors refer to conditions in which source locations were found
unexpectedly empty or destination locations were found unexpectedly full.
These conditions indicate that a cartridge was moved without the knowledge of
the autochanger, possibly during service. At this point, the host must become
involved in locating the source of the error.
The host’s actions can include issuing a Read Element Status command to
find the difference between the host’s location (element) list and that of the
autochanger, followed by an Initialize Element Status command to find the actual
locations of all disks. When the differences are determined, a final check of data
on the disk should be done, and the disk must be returned to the appropriate
location (element).
The picker ‘‘element status’’ always reflects the physical state of the picker. The
autochanger does not give a status when the picker is found unexpectedly full or
empty because this logical error is not allowed. At power-on, the picker is checked
to see if it contains a cartridge. The mechanical design of the picker prevents a
cartridge from being fully inserted into the picker without first going through an
initial power-on cycle in the autochanger.
Physical errors refer to conditions in which something physically changes in
the system that prevents normal operation of the motion. These can be either
temporary or permanent. Error recovery attempts to recover from every physical
error without host intervention. Any error that is detected through overforce,
sense of touch, or by a sensor calls a procedure to attempt the recovery.
One exception to the no-host-intervention rule is in the drive/autochanger
interaction. If the autochanger indicates that a cartridge has been inserted
into the drive, but the drive does not read it, the host must become involved in
identifying the source of the problem. Likewise, if the drive is commanded to
eject a cartridge and does not do so, the drive is considered to be empty and the
host must identify either the final position of the cartridge or determine if the
drive has failed.
Theory of Operation 6–25
6.6.5 Hardware Error Codes
If an error is unrecoverable (i.e., something is broken or jammed to a point that
manual intervention is required), the autochanger takes an additional step in an
attempt to identify the Field Replaceable Unit (FRU) that is causing the failure.
A routine is called automatically that performs a process of elimination for
various FRUs. This routine attempts to isolate the error to three (or less) FRUs.
If no error can be found (or if recovery was made from the error), the unit returns
a ‘‘no error’’ status. If an error is found, a hardware error code and a move
error code is returned when the command completes. Up to three FRU numbers
are returned. The FRUs, and a time stamp, are listed in decreasing order of
probability.
Hardware Error Codes are listed in Section 4.7
6.6.6 Real Time Event Logging
Logs
The optical disk library provides information logs about its operation and error
history. These logs provide predictive information that can lead to early detection
of autochanger problems.
All logs are maintained within the nonvolatile RAM and are accessible through
the control panel and by the SCSI Log Sense command over the SCSI interface.
The main functions provided with operational logs are described below.
Error Log
The autochanger maintains a history of past diagnostic test errors that have
occurred within the autochanger, along with a time stamp of when they occurred.
The error message maintained for each error indicates the failure and the possible
FRUs that may have caused the failure.
Move Success Log
A cumulative number of move recoveries and a total move count are maintained.
This gives service a view of the history of the autochanger soft error rate. The
last ten hard errors are marked in this log by indicating how many good moves
occurred since the last hard error.
Force Log
Each cartridge move is actually a sequence of many small moves, known as
micro-moves. This log is a record of the maximum force measure during every
micro-move situation.
Recovery Log
This is a record of recoverable (soft) errors, and related information on error
recovery methods used and their success or failure.
6–26 Theory of Operation
Drive Log
This data indicates the number of times the autochanger uses the drive.
Runtime Log
An entry is put into this log each time an error occurs that requires any form
of recovery. Both ‘‘on-the-fly’’ and extensive recovery methods are logged. The
type of error, the method of recovery, and the number of moves to that point are
recorded.
Odometer
This value indicates the total number of moves executed since the nonvolatile
RAM was first initialized. Power-on hours are also recorded.
6.7 The SCSI Interface
As defined by ANSI (American National Standards Institute), SCSI allows up to
eight devices on the bus in any combination of computers and peripherals. The
devices can communicate with one another without control from a host computer.
Another powerful feature is the ability of SCSI to perform arbitration. SCSI
allows the host to initiate transactions, then break communication with a device,
do something else, and reestablish communication when the device is ready.
Finally, SCSI is capable of high data transfer rates. Synchronous data transfer
rates may be as fast as 4 Mbytes/second, and asynchronous rates up to 1.5
Mbytes/second, limited only by the capabilities of the computer and peripheral.
CAUTION
Do not switch off any peripheral on the SCSI bus without first checking
that the bus is not active.
Switching off can cause data loss, indeterminate bus states, or both.
6.7.1 SCSI Command Set
The following SCSI-2 commands can be used with the optical disk library.
Note
Detailed descriptions of these commands and their functionality with
optical products can be found in the following documents:
•
American National Standards Institute (ANSI) document titled,
‘‘Small Computer System Interface - 2 (SCSI-2),’’ revision 10H
which is dated September, 1991. Copies of this publication can be
Theory of Operation 6–27
obtained by writing to: Global Engineering Documents, 2805 McGaw,
Irvine, CA 92714, or call: (800) 854-7179 or (714) 261-1455. Refer to
document X3.131-SCSI-2.
•
Multifunction Optical Drive and Library SCSI-2 Command Reference.
This document can be obtained by ordering part number 59607606 from the Sales Response Center at Hewlett-Packard. Refer to
Appendix B for order information.
•
HP Technical Guide Optical Drives and Libraries, obtained by
ordering part number 5960-7605 from the Sales Response Center at
Hewlett-Packard. Refer to Appendix B for order information.
The following tables list the SCSI-2 commands numerically, by group.
Table 6–4 Group 0 Commands (6-byte command)
Code (Hex.)
Name
Description
00
Test Unit Ready
Provides a means to check if the logical unit is
ready
01
Rezero Unit
Moves the optical head to its recalibration
position
03
Request Sense
Requests the detailed error information
04
Format Unit
Initializes the optical disk (done only once for
unformatted, write-once disks)
07
Reassign Blocks
Reassigns defective sectors
08
Read
Reads data from the specified logical block
address
0A
Write
Writes data to the specified logical block
address
0B
Seek
Moves the optical head to the physical track
where the specified logical block exists
12
Inquiry
Reads the information related to the controller
and the drive unit
15
Mode Select
Sets optical disk, drive unit, or controller unit
parameters
16
Reserve
Gains the exclusive control of a specified
logical unit
(continued on next page)
6–28 Theory of Operation
Table 6–4 (Cont.) Group 0 Commands (6-byte command)
Code (Hex.)
Name
Description
17
Release
Releases a specified logical unit from the
reservation state
1A
Mode Sense
Reads optical disk, drive unit, or controller
unit parameters
1B
Start/Stop Unit
Starts or stops rotating the optical disk, ejects
the optical disk from the drive unit, or both
1C
Receive Diagnostic
Results
Requests analysis data be sent to the initiator
1D
Send Diagnostic
Requests the disk controller to perform
diagnostic tests
1E
Prevent/Allow Medium
Removal
Prevents or allows removal of the optical disk
in the logical unit
Table 6–5 Group 1 and 2 Commands (10-byte command)
Code (Hex.)
Name
Description
25
Read Capacity
Reads the capacity of the optical disk
28
Read
Reads data from the specified logical block
address
2A
Write
Writes data to the specified logical block
address
2B
Seek
Moves the optical head to the physical track
where the specified logical block exists
2C
Erase
Executes erase operation from the specified
logical block address on rewritable disks only
2E
Write and Verify
Writes data to the optical disk and then
verifies the written data by checking the
error correction code
2F
Verify
Verifies the data starting from the specified
logical block address by checking the error
correction code
34
Pre-Fetch
Reads the data from the specified logical
block address into the drive’s controller cache
memory
(continued on next page)
Theory of Operation 6–29
Table 6–5 (Cont.) Group 1 and 2 Commands (10-byte command)
Code (Hex.)
Name
Description
35
Synchronize Cache
Initiates the writing of all cached write data to
the optical disk
37
Read Defect Data
Reads the optical disk defect information
3B
Write Buffer
Writes data to the controller data buffer
3C
Read Buffer
Reads data from the controller data buffer
3E
Read Long
Reads data from the specified logical block
address including ECC data
3F
Write Long
Writes data to the specified logical block
address without using the ECC generation
circuitry
4C
Log Select
Clears drive resident logs and odometers
4D
Log Sense
Reads drive resident logs and odometers
55
Mode Select
Sets optical disk, drive unit, or controller unit
parameters
5A
Mode Sense
Reads optical disk, drive unit, or controller
unit parameters
Table 6–6 Group 5 Commands (12-byte command)
Code (Hex.)
Name
Description
A8
Read
Reads data from the specified logical block
address
AA
Write
Writes data to the specified logical block
address
AC
Erase
Executes erase operation from the specified
logical block address on rewritable disks only
AE
Write and Verify
Writes data to the optical disk and then
verifies the written data by checking the
error correction code
AF
Verify
Verifies the data starting from the specified
logical block address by checking the error
correction code
B7
Read Defect Data
Reads the optical disk defect information
6–30 Theory of Operation
A
Offline Diagnostic Information
A.1 System Error Report
Figure A–1 shows a typical VAX/VMS system error report. After analyzing the
report for symptoms, proceed to Section A.2.
Offline Diagnostic Information A–1
Figure A–1 System Error Report
V A X / V M S
SYSTEM ERROR REPORT
COMPILED
******************************* ENTRY
ERROR SEQUENCE 6552.
DATE/TIME 8−APR−1993 15:10:09.37
SYSTEM UPTIME: 5 DAYS 21:14:31
SCS NODE: KAWA
8−APR−1993 15:11:43
PAGE
1.
9. *******************************
LOGGED ON:
SID 0A000005
SYS_TYPE 04010102
VAX/VMS V5.4−2
SCSI Command Code
DEVICE ERROR
KA420
CPU FW REV# 6.
Internal Device Code (15h = 21d)
GENERIC DK SUB−SYSTEM, UNIT _KAWA$WDB300:
HW REVISION
00A50015
HW REVISION = ..¥.
ERROR TYPE
05
SCSI ID
03
SCSI LUN
00
SCSI SUBLUN
00
PORT STATUS
00000054
EXTENDED SENSE DATA RECEIVED
SCSI ID = 3.
SCSI LUN = 0.
SCSI SUBLUN = 0.
%SYSTEM−F−CTRLERR, FATAL CONTROLLER
ERROR
SCSI CMD
00000003
0078
REQUEST SENSE
SCSI STATUS
00
GOOD
EXTENDED SENSE DATA
EXTENDED SENSE
000B0070
0A000000
00000000
0000004E
00A50000
1A000000
00000100
07030000
00
Extended Sense Data Sense Key 0Bh
1st Byte of Extended Sense
Byte 12
SCSI Command Packet
Sense Key
Additional Sense
Code (ASC) 4Eh =
3. RETRIES REMAINING
Bus Protocol Error
ABORTED COMMAND
SENSE CODE = 4E(X)
UCB$B_ERTCNT
03
UCB$B_ERTMAX
03
3. RETRIES ALLOWABLE
ORB$L_OWNER
00000000
UCB$L_CHAR
1CC54008
OWNER UIC [000,000]
DIRECTORY STRUCTURED
FILE ORIENTED
SHARABLE
AVAILABLE
ERROR LOGGING
ALLOCATED
CAPABLE OF INPUT
A–2 Offline Diagnostic Information
A.2 Autochanger Error Codes
This section contains the following autochanger error code tables:
Request Sense Codes
Request Sense Maps
Move Error Codes
Micro-Move Failure Type Codes
Figure A–2 Jukebox Request Sense Data Parameter Block Format
Byte
7
0
Valid
(0)
6
5
4
3
2
0
Error Code (70h or 71h)
1
Reserved (0)
2
Reserved (0)
3−6
Sense Key *
Reserved (0)
7
Additional Sense Length *
8−11
Reserved (0)
12
Additional Sense Code
13
Additional Sense Code Qualifier
14
Reserved (0)
15
1
SKSV
16−17
Sense Key Specific
Sense Key Specific
Error Code Either 70h (current error under VMS) or 71h (deferred error)
* = See Table A–1
Offline Diagnostic Information A–3
Table A–1 Sense Key and Additional Sense Length Values
Sense
Key
(hex)
Description
Additional Sense
Length
00
No Sense—Normal conditions
10
01
Recovered Error—Usually everything is OK
70
02
Not Ready—Typically a disk isn’t spun up or inserted
10
03
Medium Error—May or may not be a serious problem
04
Hardware Error—Usually a serious problem
70
05
Illegal Request—Usually a software problem
10
06
Unit Attention—Power on, RESET, a disk inserted, etc.
10
07
Data Protect—Tried to write to a write-locked disk
08
Blank Check—A blank sector was encountered on a
READ or wasn’t blank on a WRITE
0B
Aborted Command
10
Additional Sense Code— The Additional Sense Code specifies detailed information
related to the error reported in the Sense Key field.
Additional Sense Code Qualifier—The Additional Sense Code Qualifier specifies
detailed information related to the Additional Sense Code.
SKSV—When set to 1, the Sense Key Specific bytes contains valid data. When
set to 0, bytes 15, 16, and 17 are null.
Sense Key Specific— Valid only when the Sense Key field is set to Illegal Request
(05H) and SKSV is 1.
Additional Sense Bytes—This field may contain information when the Additional
Sense Length field contains a value greater than 10. See Figure A–3.
A–4 Offline Diagnostic Information
Figure A–3 Jukebox Request Sense—Additional Sense Data
Byte
7
6
18
5
4
3
2
1
0
Move Error Code *
19
Hardware Error Code (See list of Hardware Errors in Service Manual)
20
First FRU (See list of FRUs in Service Manual)
21
Second FRU
22
Third FRU
23
MvCap
Last
24−25
26
Rsvd
(0)
PosLost
Cartin
Reserved (0)
DinRty
DEjRty PkrRec CarAssy
Reserved (0)
BFHm
FHR
Reserved (0)
BFHm
FHR
CartEl UnexpMt UnexpF Cartinv
ElRty
27
Retry Count
28−29
Reserved (0)
30
Reserved (0)
DinRty
DEjRty PkrRec CarAssy
31
Recovery Count
32−34
35
Reserved (0)
Valid
ErrEn
36−37
Cartin
Source Element Number
* = See Table A–2
Offline Diagnostic Information A–5
Jukebox Request Sense − Additional Sense Data (continued)
Byte
38
7
Valid
6
5
ErrEn
Cartin
39−40
41
3
2
ErrEn
42−43
CartEl UnexpMt UnexpF Cartinv
0
ElRty
Cartin
CartEl UnexpMt UnexpF Cartinv
ElRty
Secondary Source Element Number
Valid
ErrEn
Cartin
CartEl UnexpMt UnexpF Cartinv
45−46
Second Destination Element Number
47−49
Reserved (0)
Micro−Move ID History *
50−54
Failed Micro−Move ID
55
Micro−Move Error Code **
56
1
Destination Element Number
Valid
44
4
57−60
Vertical Motor Commanded Position
61−64
Vertical Motor Actual Position
65−68
Horizontal Motor Commanded Position
69−72
Horizontal Motor Actual Position
73−77
Reserved (0)
* = See the Micro-Move ID Table
** = See Table A–3
A–6 Offline Diagnostic Information
ElRty
Move Error Code— The movement that was being performed when the error
occured. The values of the Move Error Codes are in Table A–2.
Hardware Error Code – Determined by fault isolation, this error code indicates
the cause of the failure. Hardware error codes are listed in the ‘‘Troubleshooting
and Diagnostics’’ chapter of the service manual.
First FRU –The most likely field replaceable unit (FRU) to be the cause of the
failure. See the ‘‘Removal and Replacement’’ chapter of the service manual for a
list of FRUs.
Second FRU— The second most likely field replaceable unit (FRU) to be the cause
of the failure. See the ‘‘Removal and Replacement’’ chapter of the service manual
for a list of FRUs.
Third FRU—The third most likely field replaceable unit (FRU) to be the cause of
the failure. See the ‘‘Removal and Replacement’’ chapter of the service manual
for a list of FRUs. NOTE The FRUs returned should be considered ++pointers++
to the best area within the unit to check for the fault. Simply changing the FRU
listed may or may not fix the associated problem.
MvCap— A Move Capable bit of 1 indicates the autochanger is capable of
performing move commands.
LastSCSI – A Last bit of 1 indicates the autochanger has successfully returned
the cartridge to the state they were in before the failed command was executed.
PostLost— A Position Lost bit of 1 indicates the autochanger cannot calibrate the
mechanism and has lost position of the picker.
CartTrans— A Cartridge in Transport bit of 1 indicates a cartridge is in the
picker mechanism.
DInRty—A Drive Insert Retry bit of 1 indicates that more than one attempt was
needed to insert the cartridge into the drive. (For byte 26, this attempt refers to
Retry algorithm and for byte 30 it refers to Recovery algorithm).
DEjRty—A Drive Eject Retry bit of 1 indicates that more than one attempt was
needed to eject the cartridge from the drive. (For byte 26, this attempt refers to
Retry algorithm and for byte 30 it refers to Recovery algorithm).
PkrRec—A Picker Retracted bit of 1 indicates the picker fingers were fully
retracted after a failure. (For byte 26, this attempt refers to Retry algorithm and
for byte 30 it refers to Recovery algorithm).
CarAssy—A Carriage Locked bit of 1 indicates the picker fingers were fully
retracted after a failure and the translate pin is engaged. (For byte 26, this
attempt refers to Retry algorithm and for byte 30 it refers to Recovery algorithm).
Offline Diagnostic Information A–7
BFHm—A Bad Find Home bit of 1 indicates the Find Home algorithm was
started while the optical sensors were inoperable. (For byte 26, this attempt
refers to Retry algorithm and for byte 30 it refers to Recovery algorithm).
FHR—A Find Home Recalibration bit of 1 Find Home algorithm was invoked to
recalibrate the mechanism (For byte 26, this attempt refers to Retry algorithm
and for byte 30 it refers to Recovery algorithm).
Retry Count— The total number of retry attempts that were performed.
Recovery Count— The total number of recovery attempts that were performed.
Valid— A ‘‘0’’ indicates that this and the next two bytes contain invalid data.
Valid in bytes 41 and 44 are only set during the Exchange Medium Command.
ErrEn—An Error Encountered bit of 1 indicates an error occurred while the
picker was enroute to this element.
CartEl—A Cartridge in Element bit of 1 indicates the cartridge associated with
this move is in this element.
UnexpMt—An Element Unexpected Empty bit of 1 indicates this element was
unexpectedly empty.
UnexpFl—An Element Unexpected Full bit of 1 indicates this element was
unexpectedly full.
CartInv—A Cartridge Inverted bit of 1 indicates the cartridge is inverted from its
state before the operation began.
ElRty—An Element Required Retry bit of 1 indicates an operation in or out of
this element required one or more retries.
Source Element Number—The Element Number to which the Source Element Bit
Map (byte 35) refers.
Destination Element Number—The Element Number to which the Destination
Element Bit Map (byte 38) refers.
Secondary Source Element Number—The Element Number to which the
Secondary Source Element Bit Map (byte 41) refers.
Second Destination Element Number— The Element Number to which the
Second Destination Element Bit Map (byte 44) refers.
Micro-Move ID History—The last five autochanger Micro-Move IDs for the
original movement command prior to the failure. Refer to the Micro-Move ID
Table in this manual.
Failed Micro-Move ID –Actual micro-move that failed.
A–8 Offline Diagnostic Information
Micro-Move Error Code—The error code associated with the failed Micro-Move
ID. See Table A–3.
Vertical Motor Commanded Position—The position to which the carriage motor
was commanded.
Vertical Motor Actual Position—The actual position of the carriage motor.
Horizontal Motor Commanded Position—The position to which the picker motor
was commanded.
Horizontal Motor Actual Position—The actual position of the picker motor.
Table A–2 Autochanger Move Errors
Error
Codes
Failure Description
00
Failure occurred before any servo-controlled motions were attempted during
Power on Selftest.
02
Failure while Picker is not moving.
04
Failure while moving the carriage/picker assembly away from drives.
06
Failure while moving the carriage/picker assembly toward drives.
08
Failure while flipping the picker.
0A
Failure while translating the picker assembly.
0E
Failure while moving the picker fingers back in preparation to translate.
10
Failure while moving the picker fingers to engage the cartridge from the source
storage element.
12
Failure while moving the picker fingers back to remove the cartridge from the
source storage element.
18
Failure while moving the picker fingers forwards to insert a cartridge in the
destination storage element.
1A
Failure while moving the picker fingers back after inserting a cartridge in the
destination storage slot.
20
Failure while moving the picker fingers forwards to engage the cartridge ejected
from the drive (source).
22
Failure while moving the picker fingers back to remove the cartridge from the
drive (source).
28
Failure while moving the picker fingers forwards to insert the cartridge into the
drive (destination).
(continued on next page)
Offline Diagnostic Information A–9
Table A–2 (Cont.) Autochanger Move Errors
Error
Codes
Failure Description
2A
Failure while moving the picker fingers back after inserting a cartridge into the
drive (destination).
30
Failure while moving the picker fingers forward to engage the cartridge in the
mailslot (source).
32
Failure while moving the picker fingers back to remove the cartridge from the
mailslot (source).
38
Failure while moving the picker fingers forward to insert the cartridge in the
mailslot (destination).
3A
Failure while moving the picker fingers back after inserting the cartridge in the
mailslot (destination).
40
Failure while rotating the mailslot actuator inward.
42
Failure to ensure that the mailslot rotated inward.
48
Failure while rotating the mailslot actuator outward.
4A
Failure to ensure that the mailslot rotated outward.
50
Failure while the finding the home position.
52
Failure while calibrating the carriage/picker assembly.
60
Initializing element status failed while testing an element with a cartridge in the
picker assembly.
80
Failure to remove a cartridge from a source element.
84
Failure to leave a cartridge properly in a destination element.
88
An obstruction was encountered before the cartridge had been inserted the proper
distance.
90
Source element unexpectedly empty.
94
Destination element unexpectedly full.
A0
Front mailslot sensor failed.
A2
Inside mailslot sensor failed.
A4
Drive light stuck on.
B0
Door interlock open.
A–10 Offline Diagnostic Information
Table A–3 Autochanger Micro-Move Error Codes
Error
Code
(hex)
Description
Micro-Move Errors are reported in byte 56 of the additional sense bytes (Figure A–3).
0
No error.
1
Carriage motor drive voltage exceeded limit set by firmware.
2
Carriage motor overcurrent detected by hardware.
3
Carriage motor force exceeded limit set by firmware.
4
Picker motor drive voltage exceeded limit set by firmware.
5
Picker motor overcurrent detected by hardware.
6
Picker motor force exceeded limit set by firmware.
7
Low power supply during motion.
8
High power supply during motion.
9
Move stopped because cartridge-in-path beam blocked.
A
Cartridge not detected by cartridge-in-path beam.
B
Carriage motor not tracking properly.
C
Picker motor not tracking properly.
D
Carriage motor measured voltage less than expected.
E
Picker motor measured voltage less than expected.
10
Find origin failed.
11
Calibrate failed.
12
Diagnose FRU failed.
13
Initial recovery failed.
14
Find home failed.
15
Picker initialization failed.
16
Cartridge-in-path beams are blocked.
20
Failed to find hard stop at end of flip.
22
Failed to see sensor close at the end of translate.
23
Failed to move to the vertical position needed to engage the translate pin.
24
Failed to see sensor close at the start of translate.
(continued on next page)
Offline Diagnostic Information A–11
Table A–3 (Cont.) Autochanger Micro-Move Error Codes
Error
Code
(hex)
Description
25
Failed to see height sensor re-open after closing at the start of a translate.
28
The translate distance was too long.
29
The translate distance was too short.
31
Failed while checking for cartridge in a drive.
32
Failed to find a hard stop returning cartridge to storage after testing for presence
of cartridge.
33
Failed while checking for cartridge in a storage slot.
34
Failed while checking for cartridge in the Picker.
35
Failed while checking for cartridge in the mailslot.
36
Could not free fingers after testing for a cartridge in a drive.
38
Failed to verify that cartridge exists after insert.
40
Failed finding the back of storage slot during retraction.
41
Failed to verify that a disk is in the storage slot on get using cartridge-in-path
beams.
42
Not able to measure the depth of the storage slot.
43
Failed to free fingers from the storage slot.
48
Could not find the back of the storage slot after insert.
49
Failed to verify that a cartridge exists in the storage slot after insert.
4A
Could not free fingers from storage slot after insert.
50
Could not find the back of the mailslot after get.
51
Failed to verify that a disk is in the mailslot on get using cartridge-in-path
beams.
52
Not able to measure the depth of the mailslot.
58
Could not find the back of the mailslot after insert.
59
Failed to verify that a cartridge exists in the mailslot after insert.
60
Failed to rotate the mailslot in.
61
Failed to rotate the mailslot out.
70
Exhausted retries while attempting to get the drive to eject the cartridge.
(continued on next page)
A–12 Offline Diagnostic Information
Table A–3 (Cont.) Autochanger Micro-Move Error Codes
Error
Code
(hex)
Description
71
Could not verify that the drive ejected the cartridge.
72
Could not free fingers from the drive.
73
No cartridge in drive.
74
No load complete.
75
Drive error signal.
76
Unexpected cartridge in the drive.
77
Unexpected load complete.
78
Exhausted retries attempting to get drive to accept the cartridge.
79
Could not verify that the drive accepted the cartridge.
7E
Inline recovery attempts exhausted.
Errors above are counted in the runtime log as in-line, errors below as retries.
90
Drive access was disallowed because drive busy signal was active.
91
Drive light stuck off.
94
Outside mailslot sensor failed.
95
Inside mailslot sensor failed.
96
Mailslot rotation failure; possibly caused by operator.
FA
Test drive insert retry.
FB
Timed out waiting for drive to eject when testing for the presence of a cartridge;
retry being attempted.
FC
Retry being attempted on drive insert.
FD
Retry being attempted on drive eject.
FE
Mechanism error.
A.3 Drive SCSI-2 Reference
This section contains the following information:
Request Sense Command sense key values
Request Sense Command additional sense code values
HP-Specific Error Codes
Offline Diagnostic Information A–13
Figure A–4 Drive Request Sense Data Parameter Format
Byte
0
7
6
AV
5
4
2
1
0
Error Code (70H or 71H)
Reserved (0)
1
2
3
Reserved (0)
ILI
Rsvd (0)
Sense Key*
3
Information (MSByte)
4
Information
5
Information
6
Information (LSByte)
7
Additional Sense Length (0AH)
8
Command Specific Information (MSByte) (reassign blocks only)
9
Command Specific Information (reassign blocks only)
10
Command Specific Information (reassign blocks only)
11
Command Specific Information (LSByte) (reassign blocks only)
12
Additional Sense Code**
13
Additional Sense Code Qualifier**
Reserved (0)
14
15
SKSV
Sense Key Specific Information (if Sense Key = 1,3,4,5)
16
Sense Key Specific Information
17
Sense Key Specific Information
18
HP−Specific Error Code***
19
HP−Specific Error Code***
20
Reserved (0)
21
HP−Specific DSP Error Information (MSByte)
22
HP−Specific DSP Error Information (LSByte)
23
HP−Specific DSP Status Byte
MR−6080−RA
A–14 Offline Diagnostic Information
These asterisks are keyed to Figure A–4:
* = See Table A–1
** = See Table A–4
*** = See Table A–5
AV– A Valid bit of 1 indicates the information field contains valid information. A
Valid bit of 0 indicates that the information field does not contain valid data.
ILI– An Incorrect Length Indicator bit of 1 usually indicates that the requested
logical block length did not match the logical block length of the data on the
medium.
Information–
1. The logical block address associated with the sense key.
2. The difference (residue) of the requested length minus the actual length in
either bytes or blocks, as determined by the command, when the ILI bit is set.
Command Specific Information– The logical block address of the first defect
descriptor not reassigned is returned in this field.
SKSV– A Sense Key Specific Valid bit of 1 indicates that the Sense Key Specific
Information is valid. A SKSV bit of 0 indicates that there is no sense key specific
information.
Sense Key Specific Information– If the Sense Key equals 1, 3, or 4, then byte 16
(MSbyte) and byte 17 (LSbyte) indicate Actual Retry Count.
If the Sense Key Specific Information (Byte 2, Bits 0-3) is set to 5-Illegal Request
and the SKSV bit is set to 1, the sense key specific field is defined as Field
Pointers, byte 16 (MSbyte) and byte 17 (LSbyte).
The Field Pointer field indicates which illegal parameters in command descriptor
blocks or data parameters are in error.
A data bit of 1 in byte 6 indicates bad command.
A data bit of 0 indicates bad data.
Offline Diagnostic Information A–15
Table A–4 Drive Request Sense - Additional Sense Code Values
Sense
Code and
Qualifier
(hex)
Sense
Key
Description (Bytes 12 and 13)
00 00
0H - NS
No Additional Sense Information
02 00
4H - HE
No ESDI Command Complete
04 01
2H - NR
LUN in Process of Becoming Ready
04 02
2H - NR
LUN Not Ready, Initializing Command Required
04 03
2H - NR
LUN Not Ready, Manual Intervention Needed
04 04
2H - NR
LUN Not Ready, Format in Progress
06 00
4H - HE
No Reference Position Found
09 01
4H - HE
Tracking Servo Failure
09 02
4H - HE
Focus Servo Failure
09 03
4H - HE
Spindle Servo Failure
0C 01
1H - RE
Write Error Recovered with Auto Reallocation
0C 02
3H - ME
Write Error - Auto Reallocation Failed
10 00
4H - HE
ID CRC or ECC Error
11 00
3H - ME
Unrecovered Read Error
11 02
3H - ME
Error Too Long to Correct
11 07
3H - ME
Data Resynchronization Error
11 0B
3H - ME
Uncorrected Read Error - Recommend reassignment
11 0C
3H - ME
Uncorrected Read Error - Recommend rewrite
11 80
3H - ME
Unrecovered error, sparing failed
12 00
3H - ME
Address Mark Not Found for ID Field
13 00
3H - ME
Address Mark Not Found for Data Field
15 01
4H - ME
Mechanical Positioning Error
17 01
1H - RE
Recovered Data With Retries
17 05
1H - RE
Recovered Data Using Previous Sector ID
17 80
1H - RE
Recovered Data With Retries, Data Auto Reallocated
17 81
1H - RE
Recovered data - Auto Reallocate Failed
18 00
1H - RE
Recovered Read Data With ECC Procedure
(continued on next page)
A–16 Offline Diagnostic Information
Table A–4 (Cont.) Drive Request Sense - Additional Sense Code Values
Sense
Code and
Qualifier
(hex)
Sense
Key
Description (Bytes 12 and 13)
18 01
1H - RE
Recovered Data With ECC/Retries
18 02
1H - RE
Recovered Data With ECC/Retries, Data Auto Reallocated
19 01
3H - ME
Defect List Not Available
19 02
3H - ME
Defect List Error in Primary List
19 03
3H - ME
Defect List Error in Grown List
1A 00
5H - IR
Parameter List Length Error
1C 01
3H - ME
Primary Defect Lists Not Found
1C 02
3H - ME
Grown Defect Lists Not Found
1D 00
3H - ME
Miscompare During Verify Operation
20 00
5H - IR
Invalid Command Operation Code
21 00
5H - IR
Illegal Logical Block Address
22 00
5H - IR
Illegal Function
24 00
5H - IR
Invalid Field In CDB
25 00
5H - IR
Invalid LUN
26 00
5H - IR
Invalid Field In Parameter List
27 00
7H - DP
Write Protected
28 00
6H - UA
Medium Changed
29 00
6H - UA
Power-On, Reset or Bus Device Reset Occurred
29 80
4H - HE
Power-on, Reset or Bus Device Reset Occurred and Selftest
Failed
2A 01
6H - UA
Mode Parameters Changed
2F 00
BH - AC
Commands Cleared by Initiator
30 01
3H - ME
Cannot Read Medium - Unknown Format
30 02
3H - ME
Cannot Read Medium - Incompatible Format
31 00
3H - ME
Medium Format Corrupted
32 00
3H - ME
No Defect Spare Location Available
32 01
3H - ME
Defect List Update Error
(continued on next page)
Offline Diagnostic Information A–17
Table A–4 (Cont.) Drive Request Sense - Additional Sense Code Values
Sense
Code and
Qualifier
(hex)
Sense
Key
Description (Bytes 12 and 13)
3A 00
2H - NR
Medium Not Present
3D 00
5H - IR
Invalid Bits in Identify Message
3F 01
6H - UA
Microcode Has Been Changed
3F 03
6H - UA
Inquiry Data Has Changed
44 00
4H - HE
Internal target failure
40 80
4H - HE
Diagnostic Failure in NVRAM Odometers
40 81
4H - HE
Diagnostic Failure in NVRAM Configurations
40 82
4H - HE
Diagnostic Failure in NVRAM Logs
40 83
4H - HE
DSP Poweron Failure
40 84
4H - HE
DM Exception (unexpected flag)
43 00
BH - AC
Message Error
47 00
BH - AC
SCSI Parity Error
48 00
BH - AC
Initiator Detected Error
4E 00
BH - AC
Overlapped Commands Attempted
53 00
4H - HE
Media Load/Unload Failed
53 02
5H - IR
Medium Removal Prevented
55 00
2H - NR
System Resource Failure (xaction queue full)
92 00
8H - BC
Overwrite Attempted
93 00
8H - BC
Empty Sector Detected
94 00
8H - BC
Written Sector Detected
95 00
2H NR
Power Interruption Pending
A–18 Offline Diagnostic Information
Table A–5 HP-Specific Drive Error Codes
Error
Code
(hex)
Message
0201
No seek complete
0202
No reference position found
0203
Tracking servo failed
0204
Focus servo failed
0205
Spindle servo failed
0206
Mechanical position error
0207
Load unload failed
0208
DSP download failed
0209
DSP import x failed
020A
DSP import y failed
020B
DSP import p failed
020C
DSP export x failed
020D
DSP export y failed
020E
DSP export p failed
020F
DSP upload log failed
0210
DSP log checksum failed
0211
DSP passthru failed
0212
Fault spinup failed
0213
Recalibrate optical disk gain failed
0214
DSP log command error
0215
DSP log unsupported
0216
DSP log status error
0220
Active sector SPDET error
0221
Active sector empty sector
0222
Data DMA error
0223
PECC DMA error
0224
EDAC shift register error
(continued on next page)
Offline Diagnostic Information A–19
Table A–5 (Cont.) HP-Specific Drive Error Codes
Error
Code
(hex)
Message
0225
ID CRC OR ECC error
0226
Data resync error
0227
Address mark error
0228
Sync mark error
0229
Incompatible format
022A
Active sector ENDEC unexpected
022B
Active sector higain with syncdet error
022C
Active sector syncmark dubbed error
022D
Active sector underflow/overflow error
022E
Active sector not empty
022F
Active sector no DSP status
0230
ENDEC locked on sector
0231
ENDEC locked prearmed
0232
ENDEC locked unexpected
0240
SEQ no transfer started
0241
SEQ unexpected EOHG
0242
SEQ unexpected status
0250
Media recognition failed
0251
Prearmed Watchdog timeout
0260
DM Task bad event
0261
DM mailbox bad event
0262
Next CD bad state
0263
Next operation bad state
0264
DM retry sector operations bad state
0265
Retry drive state bad state
0266
Retry sector operations bad state
0267
DM retry operations, bad operation type
(continued on next page)
A–20 Offline Diagnostic Information
Table A–5 (Cont.) HP-Specific Drive Error Codes
Error
Code
(hex)
Message
02FF
DM abort transaction
2001
DSP recovery
2002
DSP error
2003
DSP fault
2004
DSP warning
2011
Active sector DSP recovery
2012
Active sector DSP error
2013
Active sector DSP fault
2014
Active sector DSP warning
2021
DSP unsolicited recovery
2022
DSP unsolicited error
2023
DSP unsolicited fault
2024
DSP unsolicited warning
202A
DSP unresponsive
202B
DSP over responsive
202C
DSP poweron failure
3001
SCSI controller kill error
3002
SCSI controller message error
3003
SCSI controller command error
3004
SCSI controller RAM error
3005
SCSI controller register error
3006
SCSI controller FIFO error
3007
SCSI controller target sequence error
3008
SCSI controller command sequence error
3009
SCSI controller STS sequence error
3010
Reselection timeout
4101
Error too long to correct
(continued on next page)
Offline Diagnostic Information A–21
Table A–5 (Cont.) HP-Specific Drive Error Codes
Error
Code
(hex)
Message
4102
Data CRC failure
4103
ECC errors in interleave threshold exceeded
4401
DDS sector not found
4402
DDS reserved field not zero
4403
PDL reserved field not zero
4404
SDL reserved field not zero
4405
DDS ID field invalid
4406
PDL indicator field invalid
4407
Number of user groups (G) field invalid
4408
Number of user blocks per group (N) field invalid
4409
Number of spare blocks per group (M) field invalid
440A
User + spare blocks too large for media
440B
PDL sector not found
440C
SDL sector not found
440D
PDL length field invalid
440E
SDL number of sublists field not equal to one
440F
SDL list length field invalid
4410
PDL list incomplete
4411
PDL list not sorted
4412
PDL entry invalid
4413
SDL list incomplete
4414
SDL list not sorted
4415
SDL defect entry invalid
4416
SDL replacement entry invalid
4417
SDL defect entry in a spare group
4418
SDL replacement entry in a user group
4419
Too many defects (PDL + DSL)
(continued on next page)
A–22 Offline Diagnostic Information
Table A–5 (Cont.) HP-Specific Drive Error Codes
Error
Code
(hex)
Message
441A
DMA length too short for PDL to exist
441B
DMA length too short for SDL to exist
441C
No spare remaining
441D
Number of SDLs greater than total spares allocated
441E
DDS ID invalid for CCW media
441F
CCW media rejected
4420
Certification, erase pass failure
4421
Certification, write pass failure
4422
Certification, verify pass failure
4423
Certification, no defects remain
4424
Certification aborted
4425
No SD list for certification erase
4426
No maximum SD list for certification erase
4427
No SD list for certification write
4428
No maximum SD list for certification write
4429
No SD list for certification verify
442A
No maximum SD list for certification verify
442B
No write image memory available for certification
442C
No write buffer memory available for certification
442D
No SD list for reassign blocks read
442E
No SD list for reassign blocks write
442F
No SD list for reassign blocks read long
4430
No SD list for reassign blocks write long
4431
Reassign blocks, unexpected CD before read
4432
Reassign blocks, unexpected CD before write
4433
Reassign blocks, unexpected CD before read long
4434
Reassign Blocks, unexpected CD before write long
(continued on next page)
Offline Diagnostic Information A–23
Table A–5 (Cont.) HP-Specific Drive Error Codes
Error
Code
(hex)
Message
4435
Reassign blocks, can’t move data on CCW
4436
No defect maps found
4437
PDL duplicate entry found
4438
SDL duplicate entry found
4439
SFP not found
443A
SFP format field invalid
443B
SFP modulation field invalid
443C
SFP angular velocity field invalid
443D
SFP ECC code field invalid
443E
SFP sector size differs from detected
443F
SFP sectors in track 0 invalid
4440
SFP medium type invalid
4441
SFP largest track less than or equal to zero, invalid
4442
SFP download P-block failed
4443
DMA write failed all attempts
4444
EWR calibration error, no memory
4445
EWR calibration error, retries failed
4446
Spare retries were exhausted
4447
No memory for next spare table
4448
No working memory for read maps
4449
Retry error after DM error
444A
Sector was spared successfully
444B
No SD list for Reassign Blocks erase
444C
Reassign Blocks, unexpected CD before erase
444D
Format, number of user groups
444E
Format, number of user sectors per group
444F
Format, number of spare sectors per group
(continued on next page)
A–24 Offline Diagnostic Information
Table A–5 (Cont.) HP-Specific Drive Error Codes
Error
Code
(hex)
Message
4450
Sparing, empty sector following spare attempt
4451
Sparing, overwritten sector following spare attempt
4452
DMA 1 write failed
4453
DMA 2 write failed
4454
DMA 3 write failed
Be aware that error codes printed in boldface type are unique to a 1.3-Gbyte,
Multifunction Drive.
4455
SFP at outer diameter is invalid
4456
SFP at inner diameter is invalid
4457
SFP track pitch is invalid
4458
SFP number of bands is invalid
4459
SFP banding constant is invalid
445A
SFP number revolutions per band is invalid
445B
SFP media type differs
445C
SDL ID is invalid
445D
SDL 2X group kind invalid
445E
Format, no replacement CD available
445F
Too many PDL entries per band
4460
Format, initial erase maps failed
4461
DMA erase during write failed
4462
Blank check during format/certification failed
4463
No SD list for certification blank check
4464
No maximum SD list for certification blank check
8201
Previous sector ID
8401
Recovered data spare failed
(continued on next page)
Offline Diagnostic Information A–25
Table A–5 (Cont.) HP-Specific Drive Error Codes
Error
Code
(hex)
Message
C000
Invalid diagnostic test
C001
Register error
C002
RAM test error
C003
Checksum error
C004
CPU test error
C005
Forced test error
C006
NVRAM test error
C007
Microprocessor test error
C008
Microprocessor ROM test error
C009
Microprocessor RAM test error
C00A
EDAC test error
C00B
SEQ test error
C00C
ENDEC test error
C00D
Active sector test error
C00E
HMAC test error
C00F
Buffer RAM test error
C010
Data loopback error
C020
Connector loopback DBO IO error
C021
Connector loopback DB1 CD error
C022
Connector loopback DB2 MSG error
C023
Connector loopback DB3 REQ error
C024
Connector loopback DB4 ACK error
C025
Connector loopback DB5 ATN error
C026
Connector loopback DB6 SEL error
C027
Connector loopback DB7 BSY error
C028
Connector loopback DBP RST error
A–26 Offline Diagnostic Information
A.4 Offline Diagnostics
A diagnostic utility called DOSDASS2 is available from Hewlett-Packard for
accessing the optical disk library through the SCSI bus.
DOSDASS2 fully exercises either standalone multifunction optical drives or
autochangers that contain multifunction optical drives. Information for getting
and using DOSDASS2 is found in Appendix B.
Offline Diagnostic Information A–27
B
Basic Supplies and Reorderable Parts
B.1 Basic Supplies and Reorderable Parts
While no special tools are required to service the optical library, there are some
commonly used items that may be stocked and available as an area resource.
Item
HP Part Number
Digital Part Number
Rewritable Optical Disk Cartridges
(512 bytes/sector) Formatted capacity is
594 Mbytes per disk†
RWX1K-01 (30-38754-01)
Rewritable Optical Disk Cartridges
(512 bytes/sector) Formatted capacity is
1.2 Gbytes per disk†
RWX5K-01 (30-38754-02)
Quantity 5 of RWX1K-01 Cartridges
DL-RWX1K-AA
Write-Once Optical Disk Cartridges
(512 bytes/sector) Formatted capacity is
594 Mbytes per disk†
RWX1K-02 (30-40952-01)
Write-Once Optical Disk Cartridges
(512 bytes/sector) Formatted capacity is
1.2 Gbytes per disk†
RWX5K-02 (30-40952-02)
Quantity 5 of RWX1K-02 Cartridges
DL-RWX1K-BA
0.9m (3 ft) SCSI jumper cable; Champ to
Champ connectors
BC09K-03
1.8m (6 ft) SCSI interface cable
BC06P-06 (17-02659-02)
2.7m (9 ft) SCSI interface cable
(External UPS); Champ to Honda
connectors
C1708-60080
BC09D-09
(Storage Server)
K2291
H8574-A
Power cord
Single-ended SCSI terminator
RW1KA-AA
†To reorder media, call 1-800-DIGITAL or 1-800-344-4825
Basic Supplies and Reorderable Parts B–1
Item
HP Part Number
Differential SCSI terminator‡
A1658-62024
115 V replacement fuse 3A 250 V‡
2110-0003
230 V replacement fuse 3A 250 V‡
2110-0780
Eject tool‡
C1708-88803
Optical disk cleaning kit‡
C1700-88800
Optical disk cleaner accessory kit (extra
swabs and alcohol)‡
C1700-88801
Optical Disk Library System Technical
Reference Manual
5959-3559
(GSD)
Technical Guide Optical Drives and
Libraries
5960-7605
Optical Drive and Library SCSI-2
Command Reference
5960-7606
Offline Diagnostics for HP Optical
Products ‡
5960-7626
Digital Part Number
‡These parts can be ordered directly from the Hewlett-Packard SMO facility in California. Call
1-800-227-8164 between the hours of 6 A.M. and 5 P.M. Pacific Standard Time.
B–2 Basic Supplies and Reorderable Parts
The Instruction Manual for the Offline PC based diagnostics, DOSDASS2, can
also be ordered from the Hewlett-Packard SMO facility in California. The title of
this manual is Offline Diagnostics for Hewlett-Packard Optical Products and the
part number is 5960-7626. Extra copies may be available from Digital’s Storage
External Products Continuation Engineering Group in Shrewsbury (SHR), MA.
NOTE
To run the DOSDASS2 diagnostics, you must have an IBM AT-compatible
computer, an adapter interface board (152x/154x), a SCSI cable, and the
Offline Diagnostics for Hewlett-Packard Optical Products manual.
All other manuals and the DOSDASS2 diagnostic software are available from the
Hewlett-Packard Support Center in Greeley, Colorado. Call the Hewlett-Packard
Support Hotline, (303) 350-4646, to order. Diagnostics and SCSI-2 Command
Reference manuals are also available from internal CSC or from the Storage
External Products, Continuation Engineering Group in Shrewsbury (SHR), MA.
Basic Supplies and Reorderable Parts B–3
C
Connecting Multiple Optical Libraries
If the back panel of your host computer is configured with more than one
SCSI port, you can attach an Optical Library to each port. See Section C.1 for
directions.
You can also connect two Optical Library units to a single SCSI port on your host
computer by daisy-chaining the units together; that is, by connecting the first
Optical Library to the host computer, and then connecting the second Optical
Library to the first Optical Library. See Section C.2 for directions.
Note
Only two Optical Library units may be daisy-chained together and
connected to a single SCSI port.
If two Optical Library units are daisy-chained to one SCSI port on the host
computer, you must properly terminate the SCSI chain by installing the SCSI
terminator in the second SCSI port of the second Optical Library. See Section C.2
for directions. You must also set a new SCSI address for the autochanger
controller and the two optical disk drives of the second Optical Library unit. See
Section C.3 for directions.
C.1 Connecting Two Optical Library Units to Two SCSI
Ports
To connect two Optical Library units to separate SCSI ports on your host
computer, first check the back panel of your host computer to see that two SCSI
ports are available. SCSI ports are marked by the PMAZ label and the SCSI icon.
If there are two SCSI ports available, follow the steps in Section 2.6.2 to uncrate
and prepare each Optical Library for connection to the host computer.
Change SCSI IDs for drive and controller address if necessary before connecting
to the host computer. Refer to Section C.3.
Connecting Multiple Optical Libraries C–1
Plug the 50-pin Honda connector of the SCSI cable from the first Optical Library
unit into the lowest-numbered SCSI port on the host computer back panel. Then,
plug the 50-pin Honda connector of the SCSI cable from the second Optical
Library unit into the next-lowest-numbered SCSI port on the host computer back
panel.
For example, if option slots 0 and 2 are labeled PMAZ and have the SCSI icon,
plug the SCSI cable from the first Optical Library unit into the 50-hole connector
in option slot 0, and plug the second Optical Library unit into option slot 2.
C.2 Connecting Two Optical Library Units to One SCSI
Port
To connect two Optical Library units to one SCSI port on your host computer,
uncrate and remove the shipping screw on each Optical Library for connection to
the host computer. Then, see Figure C–1 and follow these steps:
Figure C–1 Connecting Two Optical Library Units (RW504/RW524) to One SCSI
Port
MK445−07
1. If you have already connected one Optical Library to the host system, then go
to the next list item.
If you have not already connected one Optical Library to the host system,
then locate the lowest-numbered SCSI port on the host computer back panel.
Each SCSI port is labeled with the option identifier PMAZ and the SCSI icon.
Plug the 50-pin Honda connector of the SCSI cable from the first Optical
Library unit into the lowest-numbered SCSI port on the host computer.
C–2 Connecting Multiple Optical Libraries
2. Remove the terminator from the second SCSI port on the back panel of the
first Optical Library if a terminator is in place.
Plug the terminator into the second SCSI port of the second Optical Library.
The second SCSI port is the port furthest from the Drive Address Select
Switches.
3. Locate the 50-pin Champ to 50-pin Champ SCSI jumper cable shipped in the
box marked OPEN FIRST.
4. Plug one end of the SCSI jumper cable into the second SCSI port on the
first Optical Library (the port from which you removed the terminator). The
connector is keyed so that it only attaches one way. Lock the wire brackets
into the grooves on the sides of the connector.
5. Plug the other end of the SCSI jumper cable into the first SCSI port on the
back of the second Optical Library. The first SCSI port is the port nearest the
Drive Address Select Switches. Lock the wire brackets into the grooves on the
sides of the connector. If you have not already done so, place the terminator
on the second port of the second Optical Library.
Complete the installation by following the directions in Section C.3 to change the
SCSI addresses of the second Optical Library.
If the first Optical Library is not already connected to the host system, connect
the first Optical Library unit to the host by following the instructions in your host
system documentation, after SCSI IDs are changed.
C.3 Resetting Controller and Drive SCSI Addresses
If two Optical Library units are daisy-chained together such that the first
Optical Library unit is connected to one SCSI port on the host computer and the
second unit is connected to the SCSI port on the first Optical Library, the SCSI
addresses of the second unit’s controller and disk drives must be reset so that
they are different from the controller and drive addresses of the first unit.
The autochanger controller default SCSI address is 3 for the Optical Library
units. Leave the SCSI address of the autochanger controller in the first Optical
Library unit set to the current ID number, and change the address of the
controller in the second unit to an unused ID number by performing the following
steps:
1. To avoid bus conflicts, before changing defaults, first verify the IDs of all SCSI
devices connected to the host system and the autochanger and drive IDs of
the first Optical Library.
2. Shut down the host system.
3. Ensure that the Optical Library is switched on.
Connecting Multiple Optical Libraries C–3
4. Press
NEXT
until SCSI IDs * displays.
5. Press ENTER . AC ID # displays where # may be the default number or the
current address.
This is the Autochanger controller address. If you want to change this
address press ENTER , otherwise continue to press NEXT until the drive
number whose address you want to change is displayed, (DRV1 ID 1, DRV2
ID 2, etc)
or
6. Press
PREV
7. Press
ENTER
NEXT
until the desired address number displays.
. The message SET # displays. Address is now set.
8. If you want to change additional drive addresses, Press NEXT until that drive
number is displayed and repeate steps 5 through 7 to set the new address.
9. Press
NEXT
until UPDATE or CONFLICT displays.
If CONFLICT displays, two or more drives and/or the controller have been set
to the same address and must be reset.
If UPDATE displays and you are satisfied with the address you have selected,
press ENTER .
10. Record the new address settings for future reference.
CAUTION
Do not press the Optical Library operation switch (located on the front
panel) or the power switch (located on the rear panel) until you are sure
that the SCSI bus is inactive. Pressing either button when the bus is
active can cause data loss and indeterminate bus states.
Check the host system reference manuals for information on checking the
status of the SCSI bus.
11. Push the operation switch (located on the Optical Library front panel) off and
then back on so the new address setting is recognized by the host system.
C–4 Connecting Multiple Optical Libraries
Index
A
AEC, A–3
Assembly/Disassembly Procedures, 5–2
Autochanger Configuration Choices, 3–12
Autochanger Controller PCA RAM, 5–34
Reinitializing the Autochanger
Controller PCA RAM, 5–34
B
Basic Supplies, B–1
Battery Backup, 1–5
C
Changing the Voltage Configuration,
2–10
Characteristics, 1–12
Checking the Fuse, 2–9
Checking the Voltage Setting, 2–9
Choosing Tests and Displaying Results,
3–6
Cleaning, 4–7
Tools, 4–8
Cleaning Tools, 4–8
Components, 1–2
Configurations, 3–5, 3–11
Controlling Mailslot Rotation, 3–11
Displaying, 3–5
Host Configuration, 3–11
Setting, 3–5
Connecting an Uninterruptible Power
Supply, 2–10
Connecting Multiple Optical Libraries,
C–1
Connecting Two Optical Library Units to
One SCSI Port, C–2
Connecting Two Optical Library Units to
Two SCSI Ports, C–1
Contents of Shipment, 2–3
Control Panel, 3–1
Control Panel Operations, 3–1
Controller PCA, 6–8
Data Buffer, 6–9
Formatter/Sequencer, 6–9
SCSI Controller, 6–9
Controlling Mailslot Rotation, 3–11
D
Diagnostic Test Command Descriptions,
4–33
Diagnostics, 4–1, 4–31, 4–32, 4–33, 4–38
Diagnostic Test Command Descriptions,
4–33
Electronic Core Tests, 4–38
Internal Diagnostic Tests, 4–32
Offline Diagnostics, 4–32
Sequence Tests, 4–34
Differential SCSI Interface, 1–6
Disk Cleaning, 4–7
Disk Formats, 6–10
Displaying Information Logs, 3–5
Drive Defect Management, 6–18
Index–1
Drive SCSI-2 Reference, A–13
E
Electronic Core Tests, 4–38
Environmental Requirements, 2–1
Clearance Requirements, 2–1
Operating Temperature, 2–1
Error Detection, 6–23
Error Detection and Recovery, 6–22
Error Detection, 6–23
Error Recovery Processes, 6–24
Hardware Error Codes, 6–26
Move Errors, 6–25
Real Time Event Logging, 6–26
SCSI Detected Errors, 6–24
Error Information, 4–2, 4–30
Through SCSI Commands, 4–30
Error Thresholds, 6–21
ESD Precautions, 5–1
F
Features, 1–1
Field-Replaceable Assemblies, 5–1
FIND HOME Sequence, 4–41
Specific Steps, 4–41
FIND HOME Sequence and Information
Logs, 4–41
Formatter/Sequencer, 6–9
Front Panel, 3–1
FRU Isolation Test Sequence, 4–14
G
g=16
Values for n and m for 1.3-Gbyte, 6–17
Group 1 and 2 Commands, 6–29
Group 5 Commands, 6–30
Index–2
H
Hardware Error Codes, 6–26
Hardware Error Codes and Recovery
Procedures, 4–20
Hardware Errors, 4–20
Error Codes, 4–20
Recovery Procedures, 4–20
Hardware Verification, 2–11
Host Configuration, 3–11
HP-Specific Error Codes, A–19
I
Information Logs, 3–5, 4–15
Displaying, 3–5
Installation Procedures, 2–3
Installing the RW504/RW524 Optical
Library, 2–4
Internal Diagnostic Tests, 4–32
L
Location Requirements, 2–1
M
Magneto-Optical Disks, 1–5
rewritable, 1–5, 1–13
write-once, 1–5, 1–13
Mechanism Assembly, 6–10
Loader Mechanism, 6–10
Optical Head, 6–10
Micro-Move Reference Table, 4–44
Move Errors, 6–25
Moving the Optical Disk Library, 2–13
Shipping the RW504/RW524, 2–13
Moving the RW504/RW524 Optical Disk
Library, 2–12
Moving a Short Distance, 2–12
Multifunction Optical Drive and Drive
Controller, 6–8
O
Offline Diagnostic Information, A–1
System Error Report, A–1
Offline Diagnostics, 4–32, A–27
Operation Information, 4–2
Optical Disk Cleaning, 4–7
Optical Disk Layout
650-Mbyte Capacity, 6–11
User Zone Layout, 650-Mbyte Capacity,
6–11
Optical Disk Layout and Error Correction,
6–20
Error Thresholds, 6–21
Replacement Sparing Algorithm, 6–20
Slip Sparing Algorithm, 6–20
Optical Disk Libraries Overview, 1–1
Optical Disk Specifications, 1–12
Optical Drive Mechanism, 1–4
Optical Library Components, 1–2
P
Physical Characteristics, 1–12
Capacity, 1–12
Format, 1–12
Physical Revolution to Logical Track
Layout, 6–17
Power Failure, 1–4, 2–10
Battery Backup, 1–4
UPS, 2–10
Power-on Self-tests, 4–6
Preventative Maintenance, 2–15
Primary Power, 2–2
Product Features, 1–1
Product Matrix, 1–6
R
Rear Panel, 3–3
Rear Panel Features and Controls, 3–3
Recommended Service Kit, 5–36
Recovery from Hardware Errors, 4–20
Reinitializing the Autochanger Controller
PCA RAM, 5–34
Removal and Replacement, 5–1, 5–8
Replacing the Autochanger Controller,
5–4
Replacing the Fan/Display/Operation
Button Assemblies, 5–12
Replacing the Front Bezel Assembly,
5–8
Replacing the Front Operation Switch,
5–10
Replacing the Interconnect PCA, 5–22
Replacing the Internal UPS Cable,
5–33
Replacing the Leadscrew Assembly,
5–26
Replacing the Magazine Guides, 5–31
Replacing the Mailslot Assembly, 5–14
Replacing the Optical Drive
Mechanism, 5–16
Replacing the Picker/Carriage
Assembly, 5–23
Replacing the Power Supply, 5–29
Replacing the SCSI Cable, 5–33
Service Access, 5–2
Tools Required, 5–2
Removing a Disk from the Drive, 4–9
Using the Eject Tool, 4–9
Reorderable Parts, B–1
Replaceable Parts, 5–36
Replacing the Autochanger Controller,
5–4
Replacing the Fan/Display/Operation
Button Assemblies, 5–12
Replacing the Front Bezel Assembly, 5–8
Replacing the Front Operation Switch,
5–10
Replacing the Interconnect PCA, 5–22
Replacing the Internal UPS Cable, 5–33
Replacing the Leadscrew Assembly, 5–26
Replacing the Magazine Guides, 5–31
Replacing the Mailslot Assembly, 5–14
Index–3
Replacing the Optical Drive Mechanism,
5–16
Replacing the Picker/Carriage Assembly,
5–23
Replacing the Power Supply, 5–29
Replacing the SCSI Cable, 5–33
Resetting Controller and Drive SCSI
Addresses, C–3
Restricting Disk Insertion and Removal,
3–10
S
SCSI Command Set, 6–27
SCSI Controller, 6–9
SCSI Detected Errors, 6–24
SCSI Interface, 6–27
SCSI Interface Options, 1–5
SCSI-2 commands, 6–28
Securing the Optical Disk Library, 3–8
Security, 3–10
Restricting Disk Insertion and
Removal, 3–10
Setting CONF 15 or CONF 20, 3–10
Security Code, 3–8
Setting a New Security Code, 3–8
Sequence Tests, 4–34
Service Access, 5–2
Servo PCA, 6–9, 6–10
DSP Microprocessor and Support/Servo
ControlLoops, 6–9
Read and Write Channel Electronics,
6–10
Setting a New Security Code, 3–8
Setting CONF 15 or CONF 20, 3–10
Setting the SCSI Address, 3–7
Default Address Settings, 3–7
Shipping the RW504/RW524, 2–13
Single-ended SCSI Interface, 1–5
Slip Sparing Algorithm, 6–20
Specifications, 1–7, 1–13
Environmental Specifications, 1–13
Performance Specifications, 1–8
Index–4
T
The Autochanger, 6–1
Mechanics, 6–4
Movements, 6–1
The Autochanger Controller PCA, 6–4
The Power Supply, 6–7
Theory of Operation, 6–1
Controller PCA, 6–8
Drive Defect Management, 6–18
Mechanism Assembly, 6–10
Multifunction Optical Drive and Drive
Controller, 6–8
Power Supply, 6–7
Servo PCA, 6–9
The Autochanger, 6–1
The Autochanger Controller PCA, 6–4
Troubleshooting, 4–1, 4–10, 4–11, 4–12,
4–14, 4–30
FRU Isolation Test Sequence, 4–14
Initialization Sequence, 4–11
Results of the Internal Tests, 4–12
Through the SCSI Bus, 4–10, 4–30
Using the Control Panel and
Observation, 4–10, 4–30
U
Uncrating the RW504/RW524 Optical
Library, 2–4
Uninterruptable Power Supply, 1–5
Unpacking Procedure, 2–2
UPS, 1–5, 2–10
Connecting an Uninterruptible Power
Supply, 2–10
V
Values for n and m for 1.3-Gbyte with
g=16, 6–17
Variables Set by Configuration 16, 5–34
Variables Set by Configuration 18, 5–35
Voltage Configuration, 2–10
Index–5