User's Guide | Digital Equipment Corporation Storage Works User`s guide

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User's Guide | Digital Equipment Corporation Storage Works User`s guide | Manualzz
StorageWorks Family
User’s Guide
Order Number: EK–BA350–UG. C01
This publication is part of the basic StorageWorks family documentation
set. It describes the major StorageWorks components (such as shelves,
power, SBBs, and SCSI buses), status displays, specifications, and
replacement procedures.
Digital Equipment Corporation
Maynard, Massachusetts
October 1993
While Digital believes the information included in this publication is correct as of the date of
publication, it is subject to change without notice.
Digital Equipment Corporation makes no representations that the interconnection of its products
in the manner described in this document will not infringe existing or future patent rights, nor
do the descriptions contained in this document imply the granting of licenses to make, use, or sell
equipment or software in accordance with the description.
Copyright © Digital Equipment Corporation 1992,1993.
All Rights Reserved.
Printed in the United States of America.
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to
radio communications.
Any changes or modifications made to this equipment may void the user’s authority to operate this
equipment.
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.
DEC, DECsystem, MicroVAX, RZ, VAXserver, StorageWorks, and the DIGITAL logo are trademarks
of Digital Equipment Corporation.
The postpaid READER’S COMMENTS card requests the user’s critical evaluation to assist in
preparing future documentation.
This document was prepared using VAX DOCUMENT Version 2.1.
Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vii
Manufacturer’s Declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
xi
1 Introduction
1.1
1.2
StorageWorks Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SBB Shelf Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–1
1–2
2 StorageWorks Status Reporting
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.2
2.3
2.4
Shelf Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SHELF_OK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Processing the SHELF_OK Signal . . . . . . . . . . . . . . . . . . .
Backplane SHELF_OK Jumper . . . . . . . . . . . . . . . . . . . . .
Terminator Board and Jumper Board SHELF_OK Jumpers
Shelf Status and Power Supply Status . . . . . . . . . . . . . . . . . . .
Storage SBB Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBU Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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2–2
2–2
2–3
2–4
2–6
2–8
2–10
2–12
3 StorageWorks Replacement Procedures
3.1
3.2
3.3
3.3.1
3.3.2
Replacing a Storage Device or a Power Unit
Replacing a Blower . . . . . . . . . . . . . . . . . . .
Replacing a StorageWorks Shelf . . . . . . . . .
Removing a Shelf . . . . . . . . . . . . . . . . .
Installing a Shelf . . . . . . . . . . . . . . . . .
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3–1
3–4
3–5
3–6
3–6
Shelf Power Configuration Rules . . . . . . . . .
Power Specifications . . . . . . . . . . . . . . . . . .
Universal AC and DC Input Power Supplies
Battery Backup Units . . . . . . . . . . . . . . . . .
Power Supply Replacement . . . . . . . . . . . . .
Replacing a Shelf Power Supply . . . . . . .
Replacing a BBU . . . . . . . . . . . . . . . . . .
Power Cords and Cables . . . . . . . . . . . . . . .
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4–1
4–2
4–3
4–4
4–5
4–5
4–6
4–6
4 Power
4.1
4.2
4.3
4.4
4.5
4.5.1
4.5.2
4.6
iii
5 StorageWorks SCSI Buses
5.1
5.2
5.3
5.4
5.5
5.6
Assigning Device Addresses . . . . . . . . . . . . . .
SCSI Bus Length and Termination . . . . . . . . .
SBB Shelf SCSI Bus Configurations . . . . . . . .
SBB Shelf with a Single SCSI Bus . . . . . . . . .
SBB Shelf with Two SCSI Buses . . . . . . . . . . .
Multiple SBB Shelves with a Single SCSI Bus
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5–2
5–4
5–5
5–7
5–8
5–9
DWZZA Description . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing SCSI Bus Signal Converters . . . . . . . . . . .
SCSI Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Terminating SCSI Buses . . . . . . . . . . . . . . . . . . . . . .
End-Bus SCSI Bus Signal Converter Terminators
Mid-Bus SCSI Bus Signal Converter Terminators
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6–2
6–2
6–5
6–6
6–6
6–8
6 SCSI Bus Signal Converters
6.1
6.2
6.3
6.4
6.4.1
6.4.2
A StorageWorks Product Specifications
A.1
A.2
A.3
A.4
A.5
Input Power Requirements . .
Power Units . . . . . . . . . . . . .
Physical Specifications . . . . . .
Environmental Specifications
Environmental Stabilization .
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A–1
A–1
A–2
A–3
A–4
Typical SBB Shelf — Front View . . .
Shelf Blowers . . . . . . . . . . . . . . . . . .
SHELF_OK Backplane Jumpers . . . .
SHELF_OK Disabled . . . . . . . . . . . .
SHELF_OK Enabled . . . . . . . . . . . . .
Power Supply LEDs . . . . . . . . . . . . .
Storage SBB LEDs . . . . . . . . . . . . . .
BBU LEDs . . . . . . . . . . . . . . . . . . . .
Removing an SBB from the Shelf . . . .
Replacing Blowers . . . . . . . . . . . . . . .
Power Supply Status LEDs . . . . . . . .
BBU LEDs . . . . . . . . . . . . . . . . . . . .
Removing an SBB from a Shelf . . . . .
Typical SBB Shelf . . . . . . . . . . . . . . .
SBB Device Address Switches . . . . . .
Single SCSI Bus . . . . . . . . . . . . . . . . .
SBB Shelf SCSI Buses . . . . . . . . . . . .
Single SCSI Bus on Two SBB Shelves
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1–2
1–3
2–4
2–6
2–7
2–8
2–10
2–12
3–3
3–5
4–3
4–4
4–5
5–1
5–3
5–7
5–8
5–9
Glossary
Index
Figures
1–1
1–2
2–1
2–2
2–3
2–4
2–5
2–6
3–1
3–2
4–1
4–2
4–3
5–1
5–2
5–3
5–4
5–5
iv
6–1
6–2
6–3
6–4
6–5
Typical SCSI Bus Signal Converter End-Bus
End-Bus DWZZA Bus Terminators . . . . . . .
H885–A Trilink Connector . . . . . . . . . . . . .
Mid-Bus DWZZA Bus Terminators . . . . . . .
Mid-Bus DWZZA Cabling . . . . . . . . . . . . . .
Cabling
.......
.......
.......
.......
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6–3
6–7
6–8
6–9
6–10
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viii
2–5
2–8
2–9
2–11
2–12
3–2
4–2
4–2
4–3
4–6
5–2
5–4
5–5
6–4
6–5
A–1
A–2
A–3
A–4
Tables
1
2–1
2–2
2–3
2–4
2–5
3–1
4–1
4–2
4–3
4–4
5–1
5–2
5–3
6–1
6–2
A–1
A–2
A–3
A–4
StorageWorks Related Documentation . . . . .
SHELF_OK Backplane Jumpers . . . . . . . . . .
Shelf and Single Power Supply Status LEDs
Shelf and Dual Power Supply Status LEDs .
Storage SBB Status LEDs . . . . . . . . . . . . . .
BBU Status LEDs . . . . . . . . . . . . . . . . . . . . .
Controller Response to SBB Replacement . . .
StorageWorks Power Units . . . . . . . . . . . . . .
Typical SBB DC Power Requirements . . . . . .
Maximum Available Power . . . . . . . . . . . . . .
DC Power Receptacle Wiring . . . . . . . . . . . .
SBB Device Address Switch Settings . . . . . .
SCSI Bus Parameters . . . . . . . . . . . . . . . . . .
StorageWorks Bus Lengths . . . . . . . . . . . . . .
StorageWorks SCSI Buses . . . . . . . . . . . . . .
SCSI Cable Types . . . . . . . . . . . . . . . . . . . . .
StorageWorks Power Units . . . . . . . . . . . . . .
StorageWorks Cabinet Physical Specifications
Environmental Specifications . . . . . . . . . . . .
Thermal Stabilization Specifications . . . . . . .
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v
Preface
The StorageWorks Family User’s Guide introduces the StorageWorks™ system
and the elements common to the shelves, StorageWorks building blocks (SBBs),
and other components. It describes the components, to include status reporting,
replacement procedures, power, small computer system interface (SCSI) buses,
SCSI bus signal converters, and specifications.
This manual and the StorageWorks Family Configuration Guide, which describes
the complete subsystem, comprise the basic StorageWorks documentation set.
Other documentation for this product line is listed in the Related Documents
section.
Intended Audience
This publication is for use by customer and Digital employees responsible for
configuring, installing, and maintaining the StorageWorks subsystem and its
components.
Note
Shelf installation procedures are cabinet specific and are not included in
this manual.
Documentation Conventions
The following conventions are used in this manual:
boldface type
Boldface type indicates the first instance of terms being defined in text,
in the glossary, or both.
italic type
Italic type indicates emphasis and complete manual titles. In the
glossary, italic type is also used to indicate cross-references.
vii
Structure
This manual is organized as follows:
Chapter 1
Describes the StorageWorks product line.
Chapter 2
Describes how the shelf and the device status are monitored and
reported. This chapter includes recommended corrective action for
fault conditions.
Chapter 3
Describes the procedures for replacing SBBs and shelves.
Chapter 4
Describes the StorageWorks power supplies, to include function,
operation, and status reporting.
Chapter 5
Describes the SBB shelf SCSI buses, including length,
terminators, jumpers, and devices.
Chapter 6
Describes the DWZZA–VA SCSI bus converter that provides
compatibility between an 8-bit differential SCSI–2 bus and the
8-bit single-ended SCSI–2 bus.
Appendix A
Lists the physical and electrical specifications for the
StorageWorks family components.
Glossary
Definitions of StorageWorks subsystem terms.
Index
Cross-reference to major topics.
Related Documents
Table 1 lists the StorageWorks related user documents organized by use, system,
or product.
Table 1 StorageWorks Related Documentation
Document Title
Order Number
StorageWorks Primary Publications†
StorageWorks Family Configuration Guide
EK–BA350–CG
StorageWorks Family User’s Guide ‡
EK–BA350–UG
StorageWorks Family StorageWorks Building Blocks User’s Guide
EK–SBB35–UG
StorageWorks RAID Array 110 Subsystem
BA350–EA Modular Storage Shelf User’s Guide
EK–350EA–UG
BA35X–VA Vertical Mounting Kit User’s Guide
EK–350SV–UG
DEC RAID Utilities User’s Guide
EK–DECRA–UG
HSZ10–AA Controller Site Preparation Guide
EK–HSZ10–IN
StorageWorks Expansion Storage Pedestal User’s Guide
EK-SMCPA-UG
StorageWorks RAID Array 110 Subsystem User’s Guide
EK–SM2CA–UG
StorageWorks RAID Array 110 Utility for MS–DOS User’s Guide
AA–Q0N5A–TE
† Provided with each system.
‡ Includes BA350–SA SBB shelf user’s guide.
†† Available from your Digital account representative.
(continued on next page)
viii
Table 1 (Cont.) StorageWorks Related Documentation
Document Title
Order Number
StorageWorks RAID Array 110 Subsystem
StorageWorks RAID Array 110 Utility for Novell NetWare User’s
Guide
AA–Q0N4A–TE
StorageWorks RAID Array 110 Utility for SCO UNIX User’s Guide
AA–Q0N6A–TE
StorageWorks Array Controller 140-Series
StorageWorks Array Controller HS Family of Array Controllers
User’s Guide
EK–HSFAM–UG
StorageWorks BA350–MA Controller Shelf User’s Guide
EK–350MA–UG
DECraid+ Rackmount Storage Subsystem
HSC Intelligent I/O Servers
HSC Controller User’s Guide
AA–PFSQA–TK
HSC Controller Installation Manual
EK–HSCMN–IN
StorageWorks Enclosures
BA35X–VA Vertical Mounting Kit User’s Guide
EK–350SV–UG
StorageWorks Family Desktop Expansion Unit User’s Guide
EK–BA353–UG
StorageWorks Metric Shelf Bracket Kit Installation Guide
EK–35XRD–IG
StorageWorks RETMA Shelf Rail Kit Installation Guide
EK–35XRB–IG
StorageWorks SW500-Series Cabinet Installation and User’s
Guide
EK–SW500–IG
StorageWorks SW500-Series Cabinet Cable Distribution Unit
Installation Guide
EK–SW5CU–IG
StorageWorks SW800-Series Data Center Cabinet Cable
Distribution Unit Installation Guide
EK–SWCDU–IS
StorageWorks SW800-Series Data Center Cabinet Installation and
User’s Guide
EK–SW800–IG
AXP DEC 7000 and DEC 1000 Systems
BA350–LA Modular Storage Shelf User’s Guide
EK–350LA–UG
BA655 SCSI Disk and Tape PIU Installation Guide
EK–BA655–IN
Storage Devices
Installation Notice—RZ73 Bus Termination and Jumper
Installation Guide
EK–RZ73X–IS
RRD42 Disk Drive Owner’s Manual
EK–RRD42–OM
† Provided with each system.
‡ Includes BA350–SA SBB shelf user’s guide.
†† Available from your Digital account representative.
(continued on next page)
ix
Table 1 (Cont.) StorageWorks Related Documentation
Document Title
Order Number
Storage Devices
RZ Series Disk Drive Installation Guide
EK–DRZ01–IG
RZ Series Disk Drive Reference Manual
EK–RZXXD–RM
RZ24 Hard Disk Drive Installation Guide
EK–RZ24I–IS
RZ26B Disk Drive Installation Guide
EK–RZ26B–IN
RZ2x Hard Disk Drive Upgrade Installation Instructions
EK–RZ2XH–UG
RZ2x Series Drive Bracket Installation Sheet
EK–RZ2XD–UG
SCSI Signal Converter DWZZA–AA
EK–DWZZA–SV
SCSI Signal Converter DWZZA–MA
EK–DWZZM–SV
SCSI Signal Converter DWZZA–VA
EK–DWZAA–SV
StorageWorks Family 5¼-inch Half-Height Device Installation
Guide
EK–SBB55–UG
TZ86–VA Cartridge Tape Drive Device Addresses
EK–TZ86A–UG
TLZ06 Cassette Tape Drive Installation Guide
EK–STEXP–AD
TLZ06 Cassette Tape Drive Owner’s Manual
EK–TLZ06–OM
TZ30 Cartridge Tape Drive Operator’s Manual
EK–OTZ30–OM
TZ30 Cartridge Tape Drive Reference Card
EK–OTZ30–RC
TZ30 Cartridge Tape Drive Technical Manual
EK–OTZ30–TM
TZK11 Tape Backup System User Guide
EK–TZK11-UG
General Reference Publications
Digital Systems and Options Catalog
††
Small Computer System Interface, An Overview
EK–SCSIS–OV
Small Computer System Interface, A Developer’s Guide
EK–SCSIS–DK
† Provided with each system.
‡ Includes BA350–SA SBB shelf user’s guide.
†† Available from your Digital account representative.
x
Manufacturer’s Declarations
The following statements are applicable to the StorageWorks product line:
CAUTION
This is a class A product. In a domestic environment, this product may
cause radio interference, in which case the user may be required to take
adequate measures.
ACHTUNG !
Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen
können bei Betrieb dieses Gerätes Rundfunkstörungen auftreten, in
welchen Fällen die Benutzer für entsprechende Gegenmaßnahmen
verantwortlich sind.
ATTENTION !
Ceci est un produit de Classe A. Dans un environment domestique, ce
produit risque de créer des interférences radiélectriques, il appartiendra
alors à l´utilisateur de prendre les mesures spécifiques appropriées.
xi
Acoustic Noise Declaration
BA350–SA StorageWorks Building Block Shelf
February 1, 1993
Acoustics - Preliminary Declared Values per ISO 9296 and ISO 7779
Sound Power Level
LWAd , B‡
Sound Pressure Level
LpAm , dBA
(Bystander Positions)
Product†
Idle
Operate
Idle
BA350–SA SBB Shelf
5.8
5.8
41
41
BA350–SA SBB Shelf with:
Seven RZ26–VA Disk Drives
5.9
5.9
41
41
Operate
Deskside Expansion Enclosure at the Side of the Desk
BA350–SA SBB Shelf
5.7
5.7
40
40
BA350–SA SBB Shelf with:
Seven RZ26–VA Disk Drives
5.8
5.8
40
40
Product†
Sound Power Level
LWAd , B‡
Sound Pressure Level
LpAm , dBA
(Operator Positions)
Idle
Idle
Operate
Operate
Deskside Expansion Enclosure at the Side of the Desk
BA350–SA SBB Shelf
5.7
5.7
37
37
BA350–SA SBB Shelf with:
Seven RZ26–VA Disk Drives
5.8
5.8
37
37
BA350–SA SBB Shelf
5.7
5.7
48
48
BA350–SA SBB Shelf with:
Seven RZ26–VA Disk Drives
5.8
5.8
48
48
Deskside Expansion Enclosure on Top of the Desk
† Current values for specific configurations are available from Digital Account Representatives.
‡ 1 B = 10 dBA
xii
BA350–SA StorageWorks Building Block Shelf
February 1, 1993
Schallemissionswerte - Vorläufige Werteangaben nach
ISO 9296 und ISO 7779/DIN EN27779
Schalleistungspegel
LWAd , B‡
Schalldruckpegel
LpAm , dBA
(Beistehende Position)
Leerlauf
Betrieb
Leerlauf
Betrieb
BA350–SA SBB Shelf
5,8
5,8
41
41
BA350–SA SBB Shelf mit:
7 RZ26–VA Disk Drives
5,9
5,9
41
41
Gerät†
Deskside Expansion Enclosure neben einem Schreibtisch
BA350–SA SBB Shelf
5,7
5,7
40
40
BA350–SA SBB Shelf mit:
7 RZ26–VA Disk Drives
5,8
5,8
40
40
Gerät†
Schalleistungspegel
LWAd , B‡
Schalldruckpegel
LpAm , dBA
(Bediener Position)
Leerlauf
Betrieb
Leerlauf
Betrieb
Deskside Expansion Enclosure neben einem Schreibtisch
BA350–SA SBB Shelf
5,7
5,7
37
37
BA350–SA SBB Shelf mit:
7 RZ26–VA Disk Drives
5,8
5,8
37
37
Deskside Expansion Enclosure auf einem Schreibtisch
BA350–SA SBB Shelf
5,7
5,7
48
48
BA350–SA SBB Shelf mit:
7 RZ26–VA Disk Drives
5,8
5,8
48
48
† Aktuelle Werte für spezielle Ausrüstungsstufen sind über die Digital Equipment Vertretungen
erhältlich.
‡ 1 B = 10 dBA
xiii
Für Bundesrepublik Deutschland
For Federal Republic of Germany
Pour la République féderale d’Allemagne
Hochfrequenzgerätezulassung und Betriebsgenehmigung
Bescheinigung des Herstellers/Importeurs:
Hiermit wird bescheinigt, daß die Einrichtung in Übereinstimmung mit
den Bestimmungen der DBP-Verfügung 523/1969, Amtsblatt 113/1969, und
Grenzwertklasse "A" der VDE0871 funkentstört ist.
Das Bundesamt für Zulassungen in der Telekommunikation der Deutschen
Bundespost (DBP) hat diesem Gerät eine FTZ-Serienprüfnummer zugeteilt.
Betriebsgenehmigung:
Hochfrequenzgeräte dürfen erst in Betrieb genommen werden, nachdem hierfür
von dem für den vorgesehenen Aufstellungsort zuständigen Fernmeldeamt mit
Funkstörungsmeßstelle die Genehmigung erteilt ist.
Als Antrag auf Erteilung einer Genehmigung dient eine Anmeldepostkarte
(Anhang des Handbuches) mit Angabe der FTZ-Serienprüfnummer.
Der untere Teil der Postkarte ist vom Betreiber zu vervollständigen und an das
örtliche Fernmeldeamt zu schicken. Der obere Teil bleibt beim Gerät.
Betreiberhinweis:
Das Gerät wurde funktechnisch sorgfältig entstört und geprüft. Die
Kennzeichnung mit der Zulassungsnummer bietet Ihnen die Gewähr, daß
dieses Gerät keine anderen Fernmeldeanlagen einschließlich Funkanlagen stört.
Sollten bei diesen Geräten ausnahmsweise trotzdem, z.B. im ungünstigsten Fall
beim Zusammenschalten mit anderen EVA-Geräten, Funkstörungen auftreten,
kann das im Einzelnen zusätzliche Funkentstörungsmaßnahmen durch den
Benutzer erfordern.
Bei Fragen hierzu wenden Sie sich bitte an die örtlich zuständige
Funkstörungsmeßstelle Ihres Fernmeldeamtes.
Externe Datenkabel:
Sollte ein Austausch der von Digital spezifizierten Datenkabel nötig werden,
muß der Betreiber für eine einwandfreie Funkentstörung sicherstellen, daß
Austauschkabel im Aufbau und Abschirmqualität dem Digital Originalkabel
entsprechen.
Kennzeichnung:
Die Geräte werden bereits in der Fertigung mit der Zulassungsnummer
gekennzeichnet und mit einer Anmeldepostkarte versehen. Sollte Kennzeichnung
und Anmeldepostkarte übergangsweise nicht mit ausgeliefert werden,
kontaktieren Sie bitte das nächstgelegene Digital Equipment Kundendienstbüro.
xiv
1
Introduction
The StorageWorks Family User’s Guide and StorageWorks Family Configuration
Guide comprise the basic StorageWorks documentation set. These manuals
provide information for configuring and operating a system. Rather than
duplicating information these publications complement each other. The
information they contain is supplemented by the system, shelf, and device
documentation listed in the Related Documents section of the preface.
1.1 StorageWorks Components
See StorageWorks Family Configuration Guide for a complete listing of the
StorageWorks family products.
The scope of this manual is limited to providing information about the following:
•
Component functions
•
Shelf status
•
Power unit status
•
Storage device status
•
StorageWorks building block SBB replacement procedures
•
Shelf replacement procedures
•
Power requirements
•
Power supplies
•
Small Computer System Interface (SCSI) buses
Note
The procedures for installing either an SBB shelf, a controller shelf, or
a controller and SBB shelf, routing cables, and connecting cables are
unique to each cabinet and are described in the cabinet manuals.
Introduction
1–1
Introduction
1.2 SBB Shelf Description
1.2 SBB Shelf Description
The SBB shelf shown in Figure 1–1 can be used in several different cabinet and
orientations. The dimensions of this shelf are as follows:
Dimension
Millimeters
Inches
Height
Width
Depth
150
445
350
5.9
17.5
13.8
•
The capacity of the SBB shelf is eight 3½-inch SBBs.
•
As shown in Figure 1–1, the SBB slots are numbered 0 through 7 from right
to left, starting with the slot adjacent to the SCSI connectors.
Figure 1–1 Typical SBB Shelf — Front View
(7)
POWER
6
5
4
3
2
1
0
SCSI
CONNECTORS
CXO-3617B-PH
1–2 Introduction
•
There are seven SCSI bus device addresses (that is, target IDs) that are
numbered 0 through 6. These addresses can be assigned to either 3½-inch or
5¼-inch SBBs.
•
The slot numbers and the SCSI device addresses are the same for slots 0
through 6. Slot 7 is reserved for the shelf power unit and does not have a
device address.
•
There are two 50-pin, high-density, female SCSI connectors on the backplane
adjacent to slot 0.
•
The cabinet ac or dc cable distribution unit determines the type of power unit
installed in slot 7.
•
Slot 6 can be used for either a storage SBB, a redundant power unit, or
battery backup unit (BBU).
•
As shown in Figure 1–2, each shelf has two redundant blowers mounted on
the rear of the shelf.
Introduction
1.2 SBB Shelf Description
Figure 1–2 Shelf Blowers
BLOWER 2
BLOWER 1
CXO-3847A-PH
Introduction
1–3
2
StorageWorks Status Reporting
Each StorageWorks shelf identifies error conditions or failures caused by the
major shelf components, such as blowers, power supplies, or storage devices. This
status is displayed on either the power supply or the SBB light emitting diodes
(LEDS). In addition to the visual display, the shelf generates logic signals for
processing by the SCSI controller or the host. The following sections describe the
logic signals, their states and functions, and how to interpret the LED displays.
StorageWorks Status Reporting
2–1
StorageWorks Status Reporting
2.1 Shelf Status
2.1 Shelf Status
The StorageWorks shelf power supply provides dc power, and the blowers provide
cooling for the controllers, cache memories, and storage devices. Failure of all
blowers on a shelf can cause devices to overheat and fail. When there is only one
power supply on a shelf, the loss of either dc voltage (+5 Vdc, +12 Vdc) will cause
the controllers, cache memories, and storage devices to malfunction. The status
of the power supplies and the the blowers is displayed on the upper power supply
LED. This status signal is available for processing by the SCSI controller or host.
The status signal, SHELF_OK, is the result of logically "anding" a signal based
on the speed of all blowers on the shelf and the "power good" signals for all power
units on the shelf. All StorageWorks shelves have at least two blowers and one
power supply providing the +5 Vdc and +12 Vdc. The BA350–EA controller and
SBB shelf has four blowers and from two to four power units.
2.1.1 SHELF_OK Signal
All StorageWorks shelves can accommodate either two ac or two dc power
supplies. Some shelves (such as the BA350–EA controller and SBB shelf) have
four blowers and can accommodate four ac or dc supplies. The loss of any dc
voltage or blower will cause the SHELF_OK signal to change from a high level
to a low level and turn off the upper power supply LED, even though there is
sufficient power for proper SBB operation. The defective blower or power supply
should be replaced as soon as possible to restore the subsystem to a redundant
capability.
Note
A single shelf can operate correctly with only one power supply furnishing
+5 Vdc and +12 Vdc.
When an error condition exists and the SHELF_OK signal level changes from
high to low, the result is as follows:
•
The upper power supply LED, the Shelf Status LED, is off.
•
Some controllers can process this signal and notify the host that a power
supply or blower has failed. Review the SCSI controller documentation to
determine if this signal can be processed.
2–2 StorageWorks Status Reporting
StorageWorks Status Reporting
2.1 Shelf Status
2.1.2 Processing the SHELF_OK Signal
To ensure that the shelf is properly configured so that a controller can process the
SHELF_OK signal, you must install a jumper either on the shelf backplane or on
both the terminator and jumper boards.
There are two ways to route the SHELF_OK signal to the controller. BA350–
SA SBB shelves shipped after February 1993 have backplane jumpers. These
jumpers are located on the rear of the backplane adjacent to slot 2. For shelves
manufactured earlier, there are SHELF_OK jumpers on both the terminator
board and the jumper board. In both cases, the default configuration has the
SHELF_OK jumper installed.
CAUTION
Not all hosts and controllers can process the SHELF_OK signal. Before
installing the SHELF_OK jumper. Read the controller documentation to
determine if the controller can process the SHELF_OK signal.
Installing the SHELF_OK jumper when the controller cannot process the
SHELF_OK signal may result in an incorrect shelf status being displayed.
Use the procedures in the following sections to configure the SHELF_OK as
follows:
•
If the SBB shelf was received March 1993, use the procedures in the
Backplane SHELF_OK Jumper section.
•
If the SBB shelf was received before March 1993, use the procedures in the
Terminator Board and Jumper Board SHELF_OK Jumpers section.
•
If you are not sure when the SBB shelf was received, remove the left-hand
blower from the rear of the shelf and check for jumper pins adjacent to slot 2.
StorageWorks Status Reporting
2–3
StorageWorks Status Reporting
2.1 Shelf Status
2.1.3 Backplane SHELF_OK Jumper
As shown in Figure 2–1, the SHELF_OK connector (J17), located on the
backplane adjacent to slot 2 (J12) behind the left-hand blower, has two pairs
of jumper pins. Placement of jumper W1 on these pins determines whether the
SHELF_OK signal is:
•
Routed to the upper external cable connector (JA1 and JB1)
•
Routed to slot 0
Figure 2–1 and Table 2–1 describe the proper use of the SHELF_OK jumper W1.
Figure 2–1 SHELF_OK Backplane Jumpers
CONTROLLER
CANNOT
PROCESS
SHELF_OK
K.SCSI WITH
DWZZA-VA
SHELF_OK
SLOT 2
SHELF_OK
EXTERNAL
SLOT 0
1
2
J17
SHELF_OK
EXTERNAL
CABLE
J12
CONTROLLER
CAN PROCESS
SHELF_OK
SLOT 2
SLOT 2
SHELF_OK
EXTERNAL
SLOT 0
1
2
J17
SHELF_OK
EXTERNAL
CABLE
J12
SHELF_OK
EXTERNAL
SLOT 0
1
2
J17
SHELF_OK
EXTERNAL
CABLE
J12
CXO-3832A-MC
2–4 StorageWorks Status Reporting
StorageWorks Status Reporting
2.1 Shelf Status
Table 2–1 SHELF_OK Backplane Jumpers
Controller Condition
The SCSI controller cannot process the SHELF_OK
signal.
W1
Position
Comments
NONE
Do not install the jumper.
An HSC K.scsi controller and a DWZZA–VA SCSI signal
converter are installed.
1
SHELF_OK is routed to slot 0.
The SCSI controller can process the SHELF_OK signal.
2
SHELF_OK is routed to an external cable
connector.
•
Do not install W1 when:
–
The controller cannot process the SHELF_OK signal.
–
You are not sure that the controller can process the SHELF_OK signal1 .
•
When the controller can process the SHELF_OK signal and there is a SCSI
bus signal converter installed in slot 0, install W1 in position 1 (SHELF_OK
EXTERNAL SLOT 0).
•
When the controller can process the SHELF_OK signal and a SCSI bus signal
converter is not installed in slot 0, install W1 in position 2 (SHELF_OK
EXTERNAL CABLES).
1
Check the controller documentation.
StorageWorks Status Reporting
2–5
StorageWorks Status Reporting
2.1 Shelf Status
2.1.4 Terminator Board and Jumper Board SHELF_OK Jumpers
The rules for installing jumper W1 on both the terminator board (BA35X–MB)
and the jumper board (BA35X–MC) for SBB shelves shipped before March 19932
are as follows:
•
Install jumper W1 on the two ground pins as shown in Figure 2–2 when
either of the following conditions is met:
–
The host or controller cannot process the SHELF_OK signal.
–
You are not sure that the host or controller can process the SHELF_OK
signal.
CAUTION
The terminator and jumper SHELF_OK jumpers are not compatible with
the HSC (hierarchical storage controller) K.scsi channel module. The
K.scsi channel module requires a backplane with connector J17.
Figure 2–2 SHELF_OK Disabled
W1
SHELF_OK
SHELF_OK
W1
TERMINATOR
JUMPER
CXO-3840A-MC
2
Remove the left-hand blower from the rear of the shelf. If there are jumper pins adjacent
to the slot 2 connector, there are no jumpers on the terminator and jumper boards. Use
the procedure in the Backplane SHELF_OK Jumper section.
2–6 StorageWorks Status Reporting
StorageWorks Status Reporting
2.1 Shelf Status
•
Install jumper W1 as shown in Figure 2–3 when you are positive that the host
or the controller can process the SHELF_OK signal.
Figure 2–3 SHELF_OK Enabled
W1
W1
GROUND
PINS
GROUND
PINS
TERMINATOR
JUMPER
CXO-3636A-MC
StorageWorks Status Reporting
2–7
StorageWorks Status Reporting
2.2 Shelf Status and Power Supply Status
2.2 Shelf Status and Power Supply Status
The status of both the shelf blowers and the power supplies is displayed on the
power supply LEDs as shown in Figure 2–4. The upper LED displays the shelf
status and the lower LED displays the power supply status.
•
When the upper LED is on, both the shelf blowers and the power supplies are
functioning properly.
•
When the upper LED is off, either a shelf blower or a power supply is not
functioning properly.
•
When the lower LED is off, either there is an input power problem or the
power supply is not functioning.
Figure 2–4 Power Supply LEDs
SHELF
STATUS LED
POWER SUPPLY
STATUS LED
CXO-3613B-PH
For a detailed explanation of the power supply LED codes, see Tables 2–2 and
2–3.
Table 2–2 Shelf and Single Power Supply Status LEDs
Status LED
State
Indication
Shelf (upper)
PS (lower)
On
On
System is operating normally.
Shelf (upper)
PS (lower)
Off
On
Fault status
There is a shelf fault; there is no power supply fault.
Replace blower.
Shelf (upper)
PS (lower)
Off
Off
Fault status
Shelf and power supply fault
Replace power supply as described in Chapter 4.
2–8 StorageWorks Status Reporting
StorageWorks Status Reporting
2.2 Shelf Status and Power Supply Status
Note
When a shelf has two power supplies, you must observe the LEDs on both
power supplies (see Table 2–3) to determine the status.
Table 2–3 Shelf and Dual Power Supply Status LEDs
Status LED
PS1†
PS2‡
Indication
Shelf (upper)
PS (lower)
On
On
On
On
Normal status
System is operating normally.
Shelf (upper)
PS (lower)
Off
On
Off
On
Fault status
There is a shelf fault; there is no power supply fault.
Replace blower.
Shelf (upper)
PS (lower)
Off
On
Off
Off
Fault status
PS1 is operational.
Replace PS2.
Shelf (upper)
PS (lower)
Off
Off
Off
On
Fault status
PS2 is operational.
Replace PS1.
Shelf (upper)
PS (lower)
Off
Off
Off
Off
Fault status
Possible PS1 and PS2 fault or input power problem
† Shelf power supply installed in slot 7.
‡ Redundant power supply installed in slot 6.
StorageWorks Status Reporting
2–9
StorageWorks Status Reporting
2.3 Storage SBB Status
2.3 Storage SBB Status
StorageWorks shelves monitor the status of the storage SBBs. When a fault
occurs, the fault and the SBB device address (SCSI target ID) are reported to the
controller or host for processing. The SBB internal fault/identity bus controls the
fault (lower) LED.
As shown in Figure 2–5, each storage SBB has two LED indicators that display
the SBB’s status. These LEDs have three states: on, off, and flashing.
•
The upper LED (green) is the device activity LED and is on or flashing when
the SBB is active.
CAUTION
Removing a storage SBB when the upper LED is on or flashing can cause
the loss or corruption of data.
•
The lower LED (amber) is the storage SBB fault LED and indicates an error
condition, when it is either on or flashing.
Figure 2–5 Storage SBB LEDs
DEVICE
ACTIVITY
(GREEN)
DEVICE
FAULT
(AMBER)
CXO-3671A-PH
2–10 StorageWorks Status Reporting
StorageWorks Status Reporting
2.3 Storage SBB Status
Table 2–4 defines the valid states for these LEDs.
Table 2–4 Storage SBB Status LEDs
LED
Status
Indication
Device activity
Device fault
On
Off
SBB is operating normally.
Device activity
Device fault
Flashing
Off
SBB is operating normally.
Device activity
Device fault
Off
Off
SBB is operating normally.
The SBB is inactive, and there is no fault.
Device activity
Device fault
On
On
Fault status
SBB is probably not responding to control signals.
It is recommended that you replace the SBB.
Device activity
Device fault
Off
On
Fault status
SBB is inactive and spun down.
It is recommended that you replace the SBB.
Device activity
Device fault
On
Flashing
Fault status
SBB is active and is spinning down because of the
fault.
StorageWorks Status Reporting
2–11
StorageWorks Status Reporting
2.4 BBU Status
2.4 BBU Status
The LEDs shown in Figure 2–6 display the status of the BBU.
•
The upper LED (green) is the BBU status LED.
•
The lower LED (amber) is the charge status LED.
Figure 2–6 BBU LEDs
BBU STATUS
(GREEN)
CHARGE
STATUS
(AMBER)
CXO-3670A-PH
These LEDs are controlled by internal BBU signals. The BBU status LED has
three states: on, off, and flashing. The charge status LED is either on or off. The
Table 2–5 defines the valid states for these LEDs.
Table 2–5 BBU Status LEDs
LED
Status
Indication
BBU Status (upper)
BBU Charge (lower)
On
Off
Normal status
BBU is fully charged and operational.
BBU Status (upper)
BBU Charge (lower)
Off
On
Normal status
BBU is charging.
BBU Status (upper)
BBU Charge (lower)
Flashing
ON
Fault status
Power supply failure.
BBU is in use.
BBU Status (upper)
BBU Charge (lower)
Off
Off
Fault status
Either power supply or BBU failure.
2–12 StorageWorks Status Reporting
3
StorageWorks Replacement Procedures
This chapter describes the detailed procedures for replacing SBB and blowers and
the general procedures for replacing shelves. These procedures are applicable
to all StorageWorks shelves except as noted. The procedures for replacing
controllers and cache memories are described in the individual shelf manuals.
The most critical factors relating to removing or replacing storage SBBs or
expanding a StorageWorks system are as follows:
•
The device type
•
The SCSI bus
•
The SCSI bus device address
Once a device has been initialized on a SCSI bus with a specific device address,
moving the device to another bus or changing the device address can cause
problems on the bus. Therefore, it is imperative that devices remain on the same
bus and use the same device address. Be sure to clearly identify the bus and
device address for each storage device before removing them.
When adding devices to a random array of independent disks (RAID) set it
can involve adding shelves and rerouting the SCSI buses. Rerouting a SCSI bus
to a different shelf requires that the configured SBBs must be located in the same
logical location, that is the same bus and and the same device address, that they
were prior to the expansion.
3.1 Replacing a Storage Device or a Power Unit
There are three methods for replacing SBBs, including power supplies—the
hot-swap method, the warm-swap method, and the cold-swap method. You
must determine the appropriate replacement method prior to replacing a device
or power supply.
The LEDs on the front of the SBB indicate the status, either operational or
non-operational.
•
For storage SBBs, you can use the hot-swap method providing that device is
not active (that is, the green device activity LED is off).
CAUTION
A hot-swap is a method of device removal that allows SBB removal and
replacement while the rest of the system remains on line and active.
Not all controllers support the hot-swap method. Read the controller
documentation to determine which controller-supported swap method may
be used.
StorageWorks Replacement Procedures
3–1
StorageWorks Replacement Procedures
3.1 Replacing a Storage Device or a Power Unit
•
Use the hot-swap method to replace power supplies only when there are two
power supplies in a shelf. You can remove the failed power supply while the
other furnishes the power.
•
The warm-swap method is used when there are multiple shelves in a cabinet
and power is removed from a shelf to replace an SBB. When this method
is used, none of the devices on that shelf is operational until the power is
restored.
•
The cold-swap method is normally used during initial installation or when
adding shelves. The power is removed from all shelves and all devices are
inactive. None of the devices is operational until the power is restored.
The removal or replacement of a storage SBB is reported to the controller or host
by the SWAP signal. The transition of this normally high signal to low indicates
that a storage SBB has been removed or inserted. Upon receipt of this signal, the
controller can respond as described in Table 3–1.
Table 3–1 Controller Response to SBB Replacement
Replacement Action
Controller Response
Removing a storage device when data is not being transferred.
None
Removing a storage device during during a data transfer
operation
Verify data validity.
Installing a storage device
Begin the storage device configuration process.
Use the following procedure to remove or replace an SBB:
CAUTION
Be sure that the replacement device is the same model as the one being
replaced.
When removing or replacing an SBB, always use both hands to support
the weight of the SBB.
To prevent electrostatic discharge (ESD) damage to an SBB, do not
touch the SBB connector.
1. Press the two mounting tabs together (see Figure 3–1) to release the SBB.
2. Use both hands and pull the SBB out of the shelf.
3. Insert the replacement SBB into the guide slots and push it in until it is fully
seated and the mounting tabs engage the shelf.
4. After power is applied, observe the status LEDs for the following indications:
On a power SBB, both green status LEDs should be on.
On a storage SBB, the green device activity LED is either on, flashing, or
off. The amber device fault LED is off.
On a BBU, the amber charge LED is on.
3–2 StorageWorks Replacement Procedures
StorageWorks Replacement Procedures
3.1 Replacing a Storage Device or a Power Unit
Figure 3–1 Removing an SBB from the Shelf
CXO-3611B-PH
StorageWorks Replacement Procedures
3–3
StorageWorks Replacement Procedures
3.2 Replacing a Blower
3.2 Replacing a Blower
Note
These procedures do not apply to the BA350–LA SBB shelf.
Each StorageWorks shelf has blowers mounted on the rear. Connectors on the
backplane provide the +12 Vdc of power to operate the blowers. When either
blower fails, the shelf status (upper) LED on the power SBB is off and an error
message is passed to the controller or host.
WARNING
Service procedures described in this manual that involve blower removal
or access to the rear of the shelf must be performed only by qualified
service personnel.
To reduce the risk of electrical energy hazard, disconnect the power cables
from the shelf power SBBs before removing shelf blower assemblies or
performing service in the backplane area, such as modifying the SCSI
bus.
Use the following procedure to replace a blower (see Figure 3–2).
1. If you cannot access the rear of the shelf, remove the shelf as described in
Section 3.3.1.
2. Disconnect the power cables to the shelf power SBBs.
3. Use a Phillips screwdriver to remove the safety screw in the upper right
corner or lower left corner of the blower.
4. Press the upper and lower blower mounting tabs together to release the
blower.
5. Pull the blower straight out to disconnect it from the shelf power connector.
6. Align the replacement blower connector and push the blower straight in,
making sure that both mounting tabs lock in place.
7. Replace the safety screw.
8. Replace the shelf as described in Section 3.3.2.
9. Connect the shelf power cables and verify that the shelf and all SBBs are
operating properly by observing the LEDs.
Note
If the upper power supply LED (shelf status) does not come on and all the
shelf power supplies are operating, the second blower may have failed or
the wrong blower was replaced.
3–4 StorageWorks Replacement Procedures
StorageWorks Replacement Procedures
3.2 Replacing a Blower
Figure 3–2 Replacing Blowers
CONNECTOR
PHILLIPS
SCREW
MOUNTING
TAB
BLOWER
GUIDE
CXO-3659A-PH
3.3 Replacing a StorageWorks Shelf
The procedures for removing or replacing any StorageWorks shelf are basically
the same. The major differences are the enclosure or cabinet in which the shelf
is mounted and the shelf orientation. Usually the only time you would remove a
shelf is to replace a blower.
Installing an additional shelf is not within the scope of this publication. Detailed
instructions for mounting a shelf in a cabinet are contained in the cabinet
installation guide listed in the Related Documents section of the preface.
StorageWorks Replacement Procedures
3–5
StorageWorks Replacement Procedures
3.3 Replacing a StorageWorks Shelf
3.3.1 Removing a Shelf
All shelves, except those mounted in a deskside expansion unit, are inserted
into a set of mounting brackets and secured in place with a front locking bracket.
Complete the following procedure to remove a shelf:
1. Turn off power to the shelf and disconnect the power cords.
2. Record the location of each storage device, controller, or cache memory in the
shelf.
3. Record the location of each controller interface cable.
4. Remove devices for access to the SCSI cable connectors.
5. Record the location of each SCSI cable.
6. Remove both the front locking brackets.
WARNING
A shelf with devices in all slots will weigh approximately 15 kgs (33 lbs).
Be sure to fully support the weight of the shelf with both hands at all
times to protect yourself and avoid damaging the devices. Removing all
the SBBs will significantly reduce the shelf weight.
7. Note the shelf orientation and carefully slide it out of the mounting brackets.
3.3.2 Installing a Shelf
Complete the following procedure to install a shelf.
1. Install the SHELF_OK jumpers.
2. Orient the shelf and carefully slide it into the mounting brackets.
3. When it is fully seated, install the front locking brackets.
4. Connect each SCSI cable to the same connector from which it was removed.
5. Install each SBB, controller, or cache memory in the same slot from which it
was removed.
6. Connect each controller interface cable to the same connector from which it
was removed.
7. Insert the power SBB and connect the power cord.
8. Apply power to the shelf and ensure that the shelf, the power supplies, and
all devices are functioning properly.
9. If you replaced a shelf blower, ensure that both blowers are functioning.
3–6 StorageWorks Replacement Procedures
4
Power
This chapter describes the StorageWorks power units and power configuration
rules. All of the StorageWorks power units are mounted in a 3½-inch SBB.
The are three StorageWorks power units:
•
Universal ac input power supply
•
Universal dc input power supply
•
BBU
4.1 Shelf Power Configuration Rules
The rules for configuring the StorageWorks shelves are as follows:
•
Each shelf requires either an ac or dc shelf power supply.
•
Each power supply requires a switch-controlled power source.
•
Each power supply can support a maximum of seven 3½-inch SBBs.
•
The shelf power supply must be mounted in slot 7 (the power slot) of the
shelf.
•
Either an optional redundant power supply or an optional BBU1 can be
mounted in slot 6.
•
Both ac and dc power supplies can be used in the same shelf as either the
shelf power supply or the redundant power supply.
1
BBUs cannot be used in a BA350–MA controller shelf.
Power
4–1
Power
4.2 Power Specifications
4.2 Power Specifications
Tables 4–1 through 4–3 describe the StorageWorks power units, dc power
requirements, and the maximum power available for each shelf, respectively.
CAUTION
Only the power units listed in Table 4–1 can be used with the
StorageWorks product line.
The power units pose no safety hazard to personnel during their
replacement, provided that the procedures described in Section 4.5 are
followed exactly.
Table 4–1 StorageWorks Power Units
Item
Description
BA35X–HA
Universal ac input power supply
Quantity:
Input:
Output:
BA35X–HB
Universal dc input power supply
Quantity:
Input:
Output:
BA35X–HC
Maximum of two per BA350 shelf
90–132 Vac or 175–264 Vac, 47–63 Hz (autoranging)
131 W, +12 Vdc, +5 Vdc
Maximum of two per BA350 shelf
38–60 Vdc (nominal 48 Vdc)
131 W, +12 Vdc, +5 Vdc
Battery Backup Unit†
Quantity:
Input:
Output:
Maximum of one per BA350 shelf
+12 Vdc from BA35X–HA or BA35X–HB
+12 Vdc, +5 Vdc
200 W peak for 16, 32, or 64 seconds
†BBUs cannot be used in a BA350–MA controller shelf.
Typical power requirements for StorageWorks SBBs and blowers are listed in
Table 4–2. These requirements are based on sequential SBB spin-up.
Table 4–2 Typical SBB DC Power Requirements
Steady State
Device
Spin-Up
+5 Vdc
+12 Vdc
+5 Vdc
3½-inch SBB
4W
9.6 W
4W
24.0 W
5¼-inch SBB
12 W
28.8 W
12 W
72.0 W
Blower
N/A
7.2 W
N/A
+12 Vdc
7.2 W
The power available for original equipment manufacturers (OEM) devices
depends upon the shelf type—either an SBB shelf, such as the BA350–SA, or
a controller and SBB shelf, such as the BA350–EA. Table 4–3 lists the power
available for each shelf type. Use this data to determine the number of OEM
devices that can be installed.
4–2 Power
Power
4.2 Power Specifications
Table 4–3 Maximum Available Power
Shelf Type
+5 Vdc
+12 Vdc
SBB Shelf
28.0 W
81.6 W
Controller and SBB Shelf
26.4 W
75.0 W
4.3 Universal AC and DC Input Power Supplies
Shelf and power supply status are displayed on the power supply LEDs shown in
Figure 4–1. The upper LED displays the shelf status and the lower LED displays
the status of the supply. A complete description of the status signals generated
by the shelf and power supply is contained in Chapter 2.
•
When the upper LED is on, both the shelf blowers and the power supplies are
functioning properly.
•
When the upper LED is off, either a shelf blower or a power supply is not
operating properly.
Figure 4–1 Power Supply Status LEDs
SHELF
STATUS LED
POWER SUPPLY
STATUS LED
CXO-3613B-PH
Power
4–3
Power
4.4 Battery Backup Units
4.4 Battery Backup Units
The LEDs on the BBU (see Figure 4–2) display the status of the BBU. These
LEDs are controlled by internal BBU signals. The status LED has three states:
on, off, and flashing. The charge status LED has two states: on or off. The valid
states of these LEDs are listed in Table 2–5
•
The upper LED (green) is the BBU status LED.
•
The lower LED (amber) is the charge status LED.
Figure 4–2 BBU LEDs
BBU STATUS
(GREEN)
CHARGE
STATUS
(AMBER)
CXO-3670A-PH
4–4 Power
Power
4.5 Power Supply Replacement
4.5 Power Supply Replacement
The input power for each ac and dc power supply is controlled by a switch on the
cable distribution unit. Turning this switch off removes power from all power
supplies in the cabinet. To remove power from a single power supply, you simply
disconnect the power cable from that power supply.
The three methods for replacing power units are described in Section 3.1.
Digital recommends that you use the warm-swap method whenever operational
requirements permit.
4.5.1 Replacing a Shelf Power Supply
WARNING
Always use both hands when removing or replacing an SBB in order to
fully support its weight.
Complete the following procedure to replace either a shelf power supply or a
redundant power supply:
1. Remove the input power cable from the supply.
2. Press the two mounting tabs to release the unit, and slide the unit out of the
shelf, as shown in Figure 4–3.
3. Insert the replacement unit into the guide slots and push it in until the tabs
lock in place.
4. Connect the input power cord.
5. Observe the LEDs and make sure the supply is functioning properly (refer to
Table 2–2).
6. Sequentially place the storage devices online. Observe the LEDs on both the
power supply and the storage device for normal operation indications.
Figure 4–3 Removing an SBB from a Shelf
CXO-3611B-PH
Power
4–5
Power
4.5 Power Supply Replacement
4.5.2 Replacing a BBU
WARNING
Always use both hands when removing or replacing an SBB, to fully
support its weight.
To replace a BBU in slot 6, complete the following procedure:
1. Press the two mounting tabs to release the unit, and slide the unit out of the
shelf.
2. Insert the replacement unit in the guide slots and push it in until the tabs
lock in place.
3. Observe the LEDs and ensure the BBU is charging as specified in Table 2–2.
The BBU should be fully charged in approximately 1 hour.
4.6 Power Cords and Cables
Each BA35X–HA universal input ac power supply requires an individual ac
power cord that is compatible with an International Electronic Committee (IEC)
C–14 shrouded ac receptacle connector. These cords are part of the enclosure and
are listed in the enclosure documentation.
CAUTION
Input ac power must be routed through the enclosure cable distribution
unit. This ensures proper line voltage protection for the supply. Do not
connect an ac supply directly to a wall outlet.
Each BA35X–HB universal input dc power requires an individual dc power cable
that has a plug receptacle (Molex part number 39–01–2060) and six female
pins (Molex part number 39–00–0055). The receptacle wiring is described in
Table 4–4.
Table 4–4 DC Power Receptacle Wiring
Pin No.
1
2
3
4–6 Power
Signal
+48 Vdc
BAT_STAT H
ENABLE H
Pin No.
4
5
6
Signal
+48 Vdc RTN
Not used
SIGNAL RTN
5
StorageWorks SCSI Buses
This chapter describes the StorageWorks building block (SBB) shelf SCSI buses,
including bus lengths, terminators, jumpers, and component locations.
WARNING
Service procedures described in this manual, involving blower removal or
access to the rear of the shelf must be performed only by qualified service
personnel.
To reduce the risk of electrical energy hazard, disconnect the power cables
from the shelf power supplies before removing shelf blower assemblies
or performing service in the backplane area, such as modifying the SCSI
bus.
As shown in Figure 5–1, the SBB shelf has the following:
•
Two 50-pin, high-density, female, single-ended, SCSI–2 connectors: JA1 and
JB1 (lower)
•
Either one or two SCSI buses as determined by the terminator board and the
jumper board location
Figure 5–1 Typical SBB Shelf
(7)
POWER
6
5
4
3
2
1
0
SCSI
CONNECTORS
CXO-3617B-PH
StorageWorks SCSI Buses
5–1
StorageWorks SCSI Buses
5.1 Assigning Device Addresses
5.1 Assigning Device Addresses
Use the following rules and procedures to assign device addresses to the SBBs
(disk drives, tape drives, and so forth).
CAUTION
Each device address on a SCSI bus can only be used once.
Each device address on an SBB shelf can only be used only once unless
the shelf has multiple buses and the SBBs have device address switches.
•
The SBB device address for the 3½-inch tape SBBs and all 5¼-inch SBBs is
determined by the address switch on the rear of the SBB. When the address
switch is set to the automatic position, the address is determined by the
physical location in the shelf. When these switches are set to any other valid
address, the SBB shelf connector device address is disabled.
•
Before installing the SBB in the shelf, set the switches on the rear of the SBB
to one of the addresses shown in Table 5–1.
Table 5–1 SBB Device Address Switch Settings
Switch Number
Address
1
2
3
4
5
6
0
1
2
3
4
5
6
7†
Automatic‡
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
† Normally reserved for the host.
‡ Sets the device address to the shelf default value.
•
A 5¼-inch SBB can contain one full-height (FH) or two half-height (HH)
devices. To set the device addresses for a 5¼-inch SBB with two HH devices
installed (see Figure 5–2):
–
Use the center switch to set the lower device address switch.
–
Use the left switch to set the upper device address.
Note
Only the center switch is installed when there is a FH 5¼-inch device or
only one HH 5¼-inch device in a 5¼-inch SBB.
5–2 StorageWorks SCSI Buses
StorageWorks SCSI Buses
5.1 Assigning Device Addresses
Figure 5–2 SBB Device Address Switches
5 1/4" SBB
3 1/2"
TAPE DRIVE
SBB
UP
PE
RD
EV
ICE
LO
WE
R
DE
VIC
E
LOWER DEVICE
ADDRESS SWITCH
UPPER DEVICE
ADDRESS SWITCH
1
2
3
4
5
6
DEVICE
ADDRESS
SWITCH
OFF ON
CXO-3630A-MC_R
•
To use the default shelf device address, set the switches to the automatic
setting as shown in Table 5–1.
•
The maximum number of device addresses per SCSI bus or StorageWorks
SBB shelf is seven.
•
The SBB device address for 3½-inch disk SBBs is determined automatically
by its physical location in the shelf.
•
When there is no address switch or the switch is set to automatic, the shelf
backplane connector determines the SCSI device address. For example,
–
If the SBB is in slot 5, the device address is 5.
–
If the SBB is in slot 3, the device address is 3.
StorageWorks SCSI Buses
5–3
StorageWorks SCSI Buses
5.2 SCSI Bus Length and Termination
5.2 SCSI Bus Length and Termination
Two important considerations for all SCSI buses are bus termination and bus
length.
•
Each bus requires a terminator. The terminator (T) and jumper (J) connectors
are mounted on the rear of the backplane.
•
Table 5-2 defines the maximum lengths of the StorageWorks SCSI buses as
measure between the two bus terminators.
Table 5–2 SCSI Bus Parameters
Bus Type
Transfer Rate
Meters
Feet
8-bit, single-ended
5 MB/s
6
19.7
8-bit, single-ended
10 MB/s
3
9.8
16-bit, differential
20 MB/s
25
82
See Section 5.3 for detailed discussion of shelf SCSI bus lengths.
•
•
The total length of the SCSI bus is critical. The components of bus length are
as follows:
–
Shelf backplane
–
Controller backplane
–
SCSI cables connecting the host, the controller, and the SBB shelf
The length of the SBB shelf SCSI bus is measured from the input connector,
JA1 or JB1, to the bus terminator.
Note
Adding or removing devices to a shelf does not change the length of the
shelf bus. The only way to change the length of the shelf SCSI bus is to
reposition the terminator.
5–4 StorageWorks SCSI Buses
StorageWorks SCSI Buses
5.3 SBB Shelf SCSI Bus Configurations
5.3 SBB Shelf SCSI Bus Configurations
Prior to shipment, the SBB shelf SCSI buses are configured to meet system
requirements in one of the following ways:
•
A single bus with seven device addresses (seven SBBs maximum) on one shelf
•
Two buses with four device addresses on one bus (four SBBs maximum) and
three device addresses on the other (three SBBs maximum)
•
A single bus with seven device addresses (seven SBBs maximum) on multiple
shelves
A customer can configure buses provided that the rules listed in the following
sections are strictly observed. For a complete listing of compatible SCSI cables,
see the StorageWorks Family Configuration Guide.
Note
The length of a shelf SCSI bus is the distance from the input connector to
the terminator on the shelf.
Table 5-3 lists the standard factory SCSI bus configurations and defines the bus
lengths.
Table 5–3 StorageWorks Bus Lengths
Shelf
Bus
Input
Slot 1
Slot 5
Meters
Feet
0.9
2.9
Single Shelf—Single Bus
1
1
JA1
Terminator
Jumper
J
JA1
T
POWER
7-DEVICE BUS INPUT
BUS LENGTH: 0.9 m (34.7 in)
(7)
6
5
4
3
2
1
0
JB1
CXO-3596B-MC
Single Shelf—Two Buses
1
1
JA1
Jumper†
Terminator
0.4
1.4
1
2
JB1
Jumper†
Terminator
0.6
2.0
T
JA1
J
POWER
3-DEVICE BUS INPUT
BUS LENGTH: 0.4 m (16.4 in)
(7)
6
5
4
3
2
1
0
JB1
4-DEVICE BUS INPUT
BUS LENGTH: 0.6 m (23.6 in)
CXO-3597B-MC
† The jumper is placed here for safekeeping and has no effect on the SCSI bus.
‡ From input connector (JA1) to output connector (JB1)
§ Do not install a terminator here.
(continued on next page)
StorageWorks SCSI Buses
5–5
StorageWorks SCSI Buses
5.3 SBB Shelf SCSI Bus Configurations
Table 5–3 (Cont.) StorageWorks Bus Lengths
Shelf
Bus
Input
Slot 1
Slot 5
Meters
Feet
Two Adjacent Shelves—Single Bus
1
1
JA1
NONE§
2
1
JA1
Terminator
Jumper
0.9‡
Jumper
0.9
2.9
BN21H–0E Cable
0.5
1.6
Total Bus Length
2.3
7.4
JA1
J
POWER
SHELF 1
(7)
6
5
4
3
2
1
J
0
T
POWER
SHELF 2
(7)
2.9‡
7-DEVICE BUS INPUT
BUS LENGTHS:
SHELF 1: 0.9 m (35.7 in)
JB1
SHELF 2: 0.9 m (34.7 in)
OUT
CABLE: 0.5 m (19.7 in)
TOTAL:
2.3 m (90.1 in)
IN
JA1
6
5
4
3
2
1
0
JB1
CXO-3598B-MC
† The jumper is placed here for safekeeping and has no effect on the SCSI bus.
‡ From input connector (JA1) to output connector (JB1)
§ Do not install a terminator here.
5–6 StorageWorks SCSI Buses
StorageWorks SCSI Buses
5.4 SBB Shelf with a Single SCSI Bus
5.4 SBB Shelf with a Single SCSI Bus
Use the following procedure to configure a single SBB shelf for seven devices on a
single SCSI bus (see Figure 5–3):
1. Turn off the shelf power by disconnecting the power cable from the shelf
power supplies.
2. Remove the blowers as described in Section 3.2.
3. Discharge any static buildup by momentarily touching a finger to a blank
space on the backplane.
4. Make sure that the SHELF_OK jumpers are installed correctly on either the
backplane or on both the terminator board and the jumper board as described
in Chapter 2.
5. Install the BA35X–MC jumper board in the backplane connector behind
slot 5.
6. Install the BA35X–MB terminator board in the backplane connector behind
slot 1.
7. Connect the SCSI cable to the upper connector.
8. Replace the blowers as described in Section 3.2.
9. Turn on the power and verify that all the devices are active.
Figure 5–3 Single SCSI Bus
J
JA1
T
POWER
7-DEVICE BUS INPUT
BUS LENGTH: 0.9 m (34.7 in)
(7)
6
5
4
3
2
1
0
JB1
CXO-3596B-MC
StorageWorks SCSI Buses
5–7
StorageWorks SCSI Buses
5.5 SBB Shelf with Two SCSI Buses
5.5 SBB Shelf with Two SCSI Buses
Use the following procedure to configure an SBB shelf for two SCSI buses, one
with three devices and one with four devices, as shown in Figure 5–4:
1. Turn off the shelf power by disconnecting the power cable from the shelf
power SBBs.
2. Remove the blowers as described in Section 3.2.
3. Discharge any static buildup by momentarily touching a finger to a blank
space on the backplane.
4. Make sure that the SHELF_OK jumpers are installed correctly on either the
backplane or on both the terminator board and the jumper board as described
in Chapter 2.
5. Install the BA35X–MB terminator board in the backplane connector behind
slot 5.
6. Install the unused BA35X–MC jumper board in the backplane connector
behind slot 1.
7. Connect the SCSI cable for device addresses 0, 2, and 4 to the upper
connector.
8. Connect the SCSI cable for device addresses 1, 3, 5, and 6 to the lower
connector.
9. Replace the blowers as described in Section 3.2.
10. Turn on the power and verify that all the devices are active.
Figure 5–4 SBB Shelf SCSI Buses
T
JA1
J
POWER
3-DEVICE BUS INPUT
BUS LENGTH: 0.4 m (16.4 in)
(7)
6
5
4
3
2
1
0
JB1
4-DEVICE BUS INPUT
BUS LENGTH: 0.6 m (23.6 in)
CXO-3597B-MC
5–8 StorageWorks SCSI Buses
StorageWorks SCSI Buses
5.6 Multiple SBB Shelves with a Single SCSI Bus
5.6 Multiple SBB Shelves with a Single SCSI Bus
Use the following procedure to configure two SBB shelves with seven devices on
one SCSI bus, as shown in Figure 5–5:
Note
The maximum number of SBB shelves on a single SCSI bus is two. A
maximum of seven storage SBBs can be installed in both shelves.
1. Turn off the shelf power by disconnecting the power cable from the shelf
power SBBs.
2. Remove the blowers as described in Section 3.2.
3. Discharge any static buildup by momentarily touching a finger to a blank
space on the backplane.
4. Make sure that the SHELF_OK jumpers are installed correctly on either the
backplane or on both the terminator board and the jumper board as described
in Chapter 2.
5. On the upper shelf, install the BA35X–MC jumper board in the backplane
connector behind slot 5.
6. On the lower shelf, install the BA35X–MC jumper board in the backplane
connector behind slot 5.
7. On the lower shelf, install the BA35X–MB terminator board in the backplane
connector behind slot 1.
8. Connect a BN21H-0E SCSI cable between the lower connector on the upper
shelf and the upper connector on the lower shelf.
9. Ensure that each device has a different SCSI bus address.
10. Replace the blowers as described in Section 3.2.
11. Turn on the power and verify that all the devices are active.
Figure 5–5 Single SCSI Bus on Two SBB Shelves
JA1
J
POWER
SHELF 1
(7)
6
5
4
3
2
1
J
POWER
SHELF 2
0
T
(7)
7-DEVICE BUS INPUT
BUS LENGTHS:
SHELF 1: 0.9 m (35.7 in)
JB1
SHELF 2: 0.9 m (34.7 in)
OUT
CABLE: 0.5 m (19.7 in)
TOTAL:
2.3 m (90.1 in)
IN
JA1
6
5
4
3
2
1
0
JB1
CXO-3598B-MC
StorageWorks SCSI Buses
5–9
6
SCSI Bus Signal Converters
Note
The discussion of the DWZZA-series SCSI bus signal converters
in this chapter is limited to the models, applications, cables, and
configurations applicable to the SBB shelves. The capabilities and use of
these converters in other environments or with other SCSI systems is not
within the scope of this manual.
The SBB shelf SCSI buses are 8-bit, single-ended, SCSI–2 buses. Some
controllers and hosts, or their SCSI adapters, use a 16-bit, differential SCSI
bus. Singled-ended and differential buses are incompatible. The SCSI protocol
will disable these buses when they are connected together.
SCSI bus signal converters permits connecting these buses together without
modifying the SCSI devices. For an SBB shelf the DWZZA-series SCSI bus signal
converters are used to establish compatibility between the host SCSI bus and the
SBB bus and extend the length of the SCSI bus.
Two SCSI bus signal converters are used with StorageWorks products—the
DWZZA–AA and the DWZZA–VA. Electrically and operationally these models are
identical. The primary differences are as follows:
•
The DWZZA–AA is a desktop model with a self-contained power supply
that can be connected to an SBB shelf or a DWZZA–VA converter. The
DWZZA–AA has two female cable connectors—a 68-pin, high-density and a
50-pin, low-density.
•
The DWZZA–VA is and installed in slot 0 of an SBB shelf. It has a single
female cable connector—a 68-pin, high-density.
Note
The DWZZA–VA input connector is a 68-pin, differential connector. There
is no provision for connecting a 50-pin, single-ended connector to the
DWZZA–VA.
In this chapter, SCSI buses are either a single-ended or a differential physical
bus or a single-ended physical bus connected to a differential physical bus by a
SCSI bus signal converter, a logical bus.
SCSI Bus Signal Converters
6–1
SCSI Bus Signal Converters
6.1 DWZZA Description
6.1 DWZZA Description
The following is a list of the features and functions of the DWZZA SCSI bus
signal converters:
•
Converts two physical buses (a single-ended bus and a differential bus) into a
single logical bus.
Note
The 16-bit differential host or controller bus must be operating in the
8-bit mode.
•
The length of the logical bus is equal to the length of the two physical buses.
•
The logical bus has a total of eight device addresses (0 through 7).
•
The converter does not use a SCSI device address.
•
Establishes a physical connection between a 16-bit, differential bus operating
in the 8-bit mode and an 8-bit, single-ended SCSI device (communication
between the host and the SBB are 8-bit).
•
Data transfers at rates of up to 10 million transfers per seconds (10
Megabytes/second1 ) are supported.
•
The converter operation is transparent to both buses.
6.2 Installing SCSI Bus Signal Converters
The manner in which SCSI bus signal converters are installed is primarily based
upon the SCSI host.
Note
Unless otherwise stated, the DWZZA signal converters are installed in
the end-bus position. This requires that both the differential bus and the
single-ended bus be terminated within the DWZZA.
As shown in Figure 6–1 you would connect a host to the SBB shelf as follows:
•
When using a single-ended host, you can connect the host SCSI controller or
adapter directly to the SBB shelf with a single ended cable. No DWZZA is
required for this configuration.
•
A differential host operating in the 8-bit mode can be connected directly to
the DWZZA.
•
To create a logical bus longer than the single-ended physical bus, you would
install two DWZZAs, a DWZZA–AA, and a DWZZA–VA.
–
1
The desktop model, the DWZZA–AA, is connected to the host with a
50-conductor, single-ended (SCSI–A) cable, such as a BC09D or BN21H.
This rate is supported only when at least one device supports the 10 MB/s transfer rate
and the bus has been designed as a fast bus.
6–2 SCSI Bus Signal Converters
SCSI Bus Signal Converters
6.2 Installing SCSI Bus Signal Converters
Figure 6–1 Typical SCSI Bus Signal Converter End-Bus Cabling
SINGLEENDED
SCSI
CONTROLLER
SBB
SHELF
SINGLEENDED
CABLE
JA-1
DIFFERENTIAL
SCSI
CONTROLLER
SBB
SHELF
DWZZA-VA
DIFFERENTIAL
CABLE
SLOT 0
SINGLEENDED
SCSI
CONTROLLER
SBB
SHELF
DWZZA-VA
DWZZA-AA
SINGLEENDED
CABLE
DIFFERENTIAL
CABLE
SLOT 0
CXO-3837A-MC
–
The desktop model is connected to the DWZZA–VA using a 68-conductor,
differential (SCSI–P) cable, such as a BN21K or BN21L.
With a SCSI bus signal converter you can extend the maximum length of the
SCSI bus. This distance is measured from the terminator on the SCSI host to the
terminator on the SBB shelf. This length includes the following:
•
The distance from the host terminator to the host SCSI cable connector
•
The length of all cables
•
The distance from the SBB shelf input connector or the DWZZA–VA connector
to the shelf terminator
SCSI Bus Signal Converters
6–3
SCSI Bus Signal Converters
6.2 Installing SCSI Bus Signal Converters
Table 6–1 lists the maximum bus lengths using the end-bus configuration for all
DWZZAs.
Table 6–1 StorageWorks SCSI Buses
SCSI Bus
Type
MB/s
DWZZAs
–VA
–AA
SCSI Bus Length
SBB Shelf†
Cable–Host‡
Cable
Maximum§
Type
Order No.
No SCSI Bus Signal Converters
Fast
10
0
0
0.9 m ( 3.0 ft)
2.1 m ( 6.9 ft)
3m(
9.8 ft)
SE
BC09D, BN21H
Slow
5
0
0
0.9 m ( 3.0 ft)
5.1 m (16.7 ft)
6 m ( 19.7 ft)
SE
BC09D, BN21H
Differential SCSI Host
One SCSI Bus Signal Converter
Fast
10
1
0
3 m ( 9.8 ft)
23 (75.5 ft)
26 m ( 85.3 ft)
DF
BN21K, BN21L
Slow
5
1
0
6 m (19.7 ft)
23 (75.5 ft)
29 m ( 95.1 ft)
DF
BN21K, BN21L
Single-Ended SCSI Host
Two SCSI Bus Signal Converters
Fast
10
1
1
3 m ( 9.8 ft)
26 m ( 85.3 ft)
29 m ( 95.1 ft)
SE
DF
BC09D, BN21H
BN21K, BN21L
Slow
5
1
1
6 m (19.7 ft)
29 m ( 95.1 ft)
35 m (114.8 ft)
SE
DF
BC09D, BN21H
BN21K, BN21L
Legend:
†—First shelf input connector to last shelf terminator.
‡—Host terminator to SBB shelf input connector or SBB shelf DWZZA–VA input connector.
§—Host terminator to SBB shelf terminator.
SE—SCSI–A SCSI cable, 50-conductor.
DF—SCSI–P SCSI cable, 68-conductor.
In the end-bus configuration, all the cables are terminated in the converter as
well as at the host and the SBB shelf. Note that this configuration effectively
starts a new bus at each connection.
For example, when using a single-ended and no converters, the maximum
length of the single-ended SCSI bus from the host terminator to the SBB shelf
terminator is 6 meters (19.7 ft). By using two converters, the maximum distance
from the host terminator to the SBB shelf terminator would theoretically be 37
meters (121.4 feet). However, the actual maximum length when using approved
cables is as shown in Table 6–1.
•
The maximum bus length from the host terminator to the desktop converter
50-pin connector can be either 3 meters (9.8 ft) or 6 meters (19.7 ft) depending
upon the bus speed.
•
The maximum cable length from desktop converter 68-pin connector to the
SBB shelf converter 68-pin connector is 23 meters (75.5 ft).
•
The maximum bus length from the SBB shelf converter backplane connector
to the shelf terminator can be either 3 meters (9.8 ft) or 6 meters (19.7 ft)
depending upon the bus speed.
6–4 SCSI Bus Signal Converters
SCSI Bus Signal Converters
6.2 Installing SCSI Bus Signal Converters
Note
Maximum SCSI bus length is not the same as maximum cable length.
The longest StorageWorks BN21K or BN21L SCSI–P cable is 23 meters.
Do not use a longer SCSI–P cable.
6.3 SCSI Cables
The StorageWorks Family Configuration Guide describes SCSI cables in detail.
The particular cable used with a SCSI bus signal converter depends upon the
following:
•
The bus type
–
A DWZZA–AA has both a 68-pin, high-density, differential connector and
a 50-pin, low-density, single-ended connector.
–
A DWZZA–VA has only one cable connector, a 68-pin, high-density,
differential connector for connecting to a host or controller. The DWZZA–
VA single-ended SCSI bus is routed to the SBB shelf through the 96-pin
connector on the rear of the DWZZA–VA
•
The maximum allowable bus length
•
The cable connector clearance. In some cases you must use a right-angle
connector because there is not enough clearance to use a straight connector.
DWZZA compatible cable types are listed in Table 6–2.
Table 6–2 SCSI Cable Types
Bus Connector
Cable Type
Connectors
DWZZA–VA SBB SCSI Bus Signal Converter Compatible Cables
Single-ended
N/A
Differential
BN21K–23
Differential
BN21L–23
The single-ended connector is a 96-pin connector that mates with the SBB
shelf connector.
One 68-pin, high-density, straight, connector and one 68-pin, high-density,
right-angle connector
Two 68-pin, high-density, right-angle connectors
DWZZA–AA Desktop SCSI Bus Signal Converter Compatible Cables
Single-ended
(Low-density host)
Single-ended
(High-density host)
Differential
BC06P
Two 50-pin, low-density, straight connectors with bale locks.
BC09D
50-pin, high-density, straight connector and 50-pin, low-density, straight
connector
One 68-pin, high-density, straight connector and one 68-pin, high-density,
right-angle connector
Two 68-pin, high-density, right-angle connectors
BN21K–23
Differential
BN21L–23
SCSI Bus Signal Converters
6–5
SCSI Bus Signal Converters
6.4 Terminating SCSI Buses
6.4 Terminating SCSI Buses
All SCSI buses are terminated at the physical ends of the bus or cable. This is
true even when using a SCSI bus signal converter. Both DWZZA SCSI bus signal
converters supply terminator power (TERMPOWER) to the SCSI terminators.
TERMPOWER is current limited by self-resetting fuses.
The following sections describe the procedures for configuring a DWZZA for either
end-bus (see Section 6.4.1) or mid-bus (see Section 6.4.2) operation.
CAUTION
Removing the DWZZA SCSI bus signal converter or disconnecting the
SCSI cable when the power is on can cause the SCSI bus to malfunction.
6.4.1 End-Bus SCSI Bus Signal Converter Terminators
Use the following procedure to install the single-ended and differential
terminators when the DWZZA-series SCSI bus signal converter is installed
in the end-bus position.
CAUTION
To prevent damage, the SBB bezel should be removed as few times as
possible and minimal pressure used when pushing down on the mounting
tabs.
CAUTION
Do not attempt the following procedure unless you have taken proper
precautions against electrostatic discharge (ESD). When you remove the
cover from any enclosure or device, wear an ESD grounding wrist strap.
1. Turn off the power.
2. Disconnect the SCSI cables.
3. Remove either the SBB bezel and cover or the desktop cover.
4. Install jumper J2, the single-ended SCSI–2 bus termination (see Figure 6–2),
to terminate the single-ended bus.
6–6 SCSI Bus Signal Converters
SCSI Bus Signal Converters
6.4 Terminating SCSI Buses
Figure 6–2 End-Bus DWZZA Bus Terminators
SINGLE-ENDED
SCSI-2 TERMINATION
DIFFERENTIAL
TERMINATOR
RESISTOR SIPS
J2
68-PIN
CONNECTOR
CXO-3836A-MC
5. Terminate the SCSI–P cable by installing the five resistor single-inlinepackages (SIPs).
6. Replace the SBB cover and bezel or replace the desktop cover.
7. Label the SBB bezel or the desktop cover with the status of both the
differential terminator and the single-ended terminator as either "IN" or
"OUT."
8. Install the SBB, in the shelf, connect the SCSI cable, and apply power to the
shelf.
9. Observe the system to determine if the SCSI bus and devices are functioning
properly.
SCSI Bus Signal Converters
6–7
SCSI Bus Signal Converters
6.4 Terminating SCSI Buses
6.4.2 Mid-Bus SCSI Bus Signal Converter Terminators
The SBB shelf SCSI bus signal converter, a DWZZA can be placed in the mid-bus
position using an H885–AA trilink connector (see Figure 6–3). Use the following
procedure to configure the differential connector for mid-bus operation.
Figure 6–3 H885–A Trilink Connector
REAR VIEW
FRONT VIEW
CXO-3851A-MC
Note
Normally, this procedure is only completed during initial installation of
the SCSI bus signal converter.
CAUTION
Do not attempt the following procedure unless you have taken proper
precautions against electrostatic discharge (ESD). When you remove the
cover from any enclosure or device, wear an ESD grounding wrist strap.
1. Turn off the power.
2. Disconnect the SCSI cables.
3. Remove either the SBB bezel and cover or the desktop cover.
4. Install jumper J2, the single-ended SCSI–2 bus termination (see Figure 6–4),
to terminate the single-ended bus.
6–8 SCSI Bus Signal Converters
SCSI Bus Signal Converters
6.4 Terminating SCSI Buses
Figure 6–4 Mid-Bus DWZZA Bus Terminators
SINGLE-ENDED
SCSI-2 TERMINATION
DIFFERENTIAL
TERMINATOR
RESISTOR SIPS
J2
68-PIN
CONNECTOR
CXO-3872A-MC
5. Remove the five differential bus resistor SIPs.
6. Replace the SBB cover and bezel or replace the desktop cover.
7. Install the H885–AA trilink connector in the differential connector (see
Figure 6–5).
SCSI Bus Signal Converters
6–9
SCSI Bus Signal Converters
6.4 Terminating SCSI Buses
Figure 6–5 Mid-Bus DWZZA Cabling
DIFFERENTIAL
SCSI HOST
H885A
TRILINK
CONNECTOR
SBB
SHELF
DWZZA-VA
MID-BUS
POSITION
SBB
SHELF
DWZZA-VA
END-BUS
POSITION
CXO-3871A-MC
8. Connect the input SCSI–P cable from the host or the desktop converter to the
trilink connector.
9. Connect a SCSI–P cable from the trilink connector to the input connector on
the second DWZZA–VA.
10. Ensure that the differential bus is terminated on the last DWZZA on the bus
(see Section 6.4.1).
11. Label the SBB bezels with the status of both the differential terminator and
the single-ended terminator as either "IN" or "OUT."
12. Install the SBB DWZZA signal converter, connect the SCSI cable, and apply
power to the shelf.
13. Observe the system to determine if the SCSI bus and devices are functioning
properly.
6–10 SCSI Bus Signal Converters
A
StorageWorks Product Specifications
This appendix chapter describes the physical and environmental specifications for
the StorageWorks products. See the Digital Systems and Options Catalog for the
operating specifications for storage devices, controllers, and host computers.
A.1 Input Power Requirements
The input power requirements for a StorageWorks enclosure are determined by
the number of shelves, the enclosure power distribution units, the fans, and other
features.
A.2 Power Units
Each StorageWorks shelf requires an ac or dc power unit. The power unit type is
determined by the enclosure power system, either ac or –48 V dc.
All shelves can have a redundant power unit to ensure that a power unit
failure does not disable the shelf. In most cases, battery backup units (BBUs)
can be combined with the shelf power unit to provide extended system data
integrity. See the following table and StorageWorks Family User’s Guide for more
information about the power units.
Table A-4 contains the specifications for the BA35X–HA, the BA35X–HB, and the
BA35X–HC StorageWorks power units.
Table A–1 StorageWorks Power Units
Specifications
BA35X–HA
BA35X–HB
BA35X–HC
Power unit type
AC input
DC input
Battery backup
Input voltage range
90–264 V ac
36–72 V dc
N/A
Nominal input voltage
110 V ac
48 V dc
12 V dc‡
Autoranging feature
Yes
Yes
No
Output voltages
12 V dc
5 V dc
12 V dc
5 V dc
12 V dc
5 V dc
Output power†
131 W
131 W
200 W peak power for
16, 32, or 64 seconds
† Sequential device spin-up at 4-second interval mandatory.
‡ Charging voltage.
StorageWorks Product Specifications
A–1
StorageWorks Product Specifications
A.3 Physical Specifications
A.3 Physical Specifications
Table A–2 lists the physical specifications of the cabinets, StorageWorks shelves,
and StorageWorks building blocks (SBBs).
Note
The depth specifications in Table A–2 do not include the service area
requirements, which are as follow:
•
The data center cabinet requires both front and rear service areas of
762 millimeters (30 inches).
•
Deskside expansion enclosures are portable and should be positioned
to provide a front or rear service area of 762 millimeters (30 inches).
•
Desktop expansion enclosures do not require a service area.
Table A–2 StorageWorks Cabinet Physical Specifications
Description
Height
mm (in)
Width
mm (in)
Depth
mm (in)
Capacity†
875
875
400
400
400
(34.5)
(34.5)
(15.75)
(15.75)
(15.7)
10
24
1
N/A
N/A
350
350
350
350
(13.8)
(13.8)
(13.8)
(13.8)
StorageWorks Enclosures
SW500-series data center cabinet
SW800-series data center cabinet
Deskside expansion enclosure
Deskside expansion enclosure‡
Desktop expansion enclosure
1070
1700
578
578
60
(42.1)
(66.6)
(22.75)
(22.75)
(2.4)
600
800
203
356
432
(23.6)
(31.5)
(8.0)
(14.0)
(17.0)
StorageWorks Shelves
BA350–EA controller and SBB shelf
BA350–LA SBB shelf
BA350–SA SBB shelf
BA350–MA controller shelf
300
150
150
150
(11.8)
(5.9)
(5.9)
(5.9)
445
445
445
445
(17.5)
(17.5)
(17.5)
(17.5)
StorageWorks Building Blocks
3½-inch SBB
5¼-inch SBB
121 (4.8)
121 (4.8)
† BA350–SA SBB shelves.
‡ StorageWorks RAID Array 110 Subsystem configuration.
A–2 StorageWorks Product Specifications
51 (2.0)
152 (6.0)
216 (8.5)
267 (10.5)
StorageWorks Product Specifications
A.4 Environmental Specifications
A.4 Environmental Specifications
The StorageWorks product line environmental specifications listed in Table A–3
are the same as for other Digital storage devices.
Table A–3 Environmental Specifications
Condition
Specification
Optimum Operating Environment
Temperature
Rate of change
Step change
+18° to +24°C (+65° to +75°F)
3°C (5.4°F)
3°C (5.4°F)
Relative humidity
40% to 60% (noncondensing) with a step change of 10% or less
(noncondensing)
Altitude
From sea level to 2400 m (8000 ft)
Air quality
Maximum particle count .5 micron or larger, not to exceed 500,000
particles per cubic ft of air
Inlet air volume
.026 cubic m per second (50 cubic ft per minute)
Maximum Operating Environment (Range)
Temperature
+10° to +35°C (+50° to +95°F)
Derate 1.8°C for each 1000 m (1.0°F for each 1000 ft) of altitude
Maximum temperature gradient 11°C/hr (20°F/hr) ±2°C/hr (4°F/hr)
Relative humidity
10% to 90% (noncondensing)
Maximum wet bulb temperature: 28°C (82°F)
Minimum dew point: 2°C (36°F)
Maximum Nonoperating or Storage Environment (Range)
Temperature
Nonoperating
Storage
Relative humidity
Nonoperating
Storage
Altitude
+18° to +29°C (+65° to +85°F)
–40° to +66°C (–40° to +151°F)
10% to 90% (noncondensing)
8% to 95% in original shipping container (noncondensing);
otherwise, 50% (noncondensing)
From –300 m (–1000 ft) to +3600 m (+12,000 ft) MSL
StorageWorks Product Specifications
A–3
StorageWorks Product Specifications
A.5 Environmental Stabilization
A.5 Environmental Stabilization
To ensure proper operation of Digital storage devices, the SBB temperature must
be within 18–29°C (65–85°F). Table A–4 specifies the time required to thermally
stabilize SBBs based on the ambient shipping temperature.
CAUTION
Always stabilize storage devices in the operating environment prior to
installation or operation. Otherwise, the media or associated electronics
may be damaged when power is applied to the unit.
If condensation is visible on the outside of the storage device:
Stabilize the device and the SBB in the operating environment for 6 hours or
until the condensation is no longer visible, whichever is longer. Do not insert
the storage device into the shelf until it is fully stabilized.
If condensation is not visible on the outside of the storage device:
Thermally stabilize the device for the amount of time specified in Table A–4.
Table A–4 Thermal Stabilization Specifications
Ambient
Temperature
Range °C
Ambient
Temperature
Range °F
Minimum
Stabilization
Time
60
50
40
30
18
10
0
–10
–20
–30
–40
140
122
104
86
65
50
32
14
–4
–22
–40
3 hours
2 hours
1 hour
30 minutes
None
30 minutes
1 hour
2 hours
3 hours
4 hours
5 hours
to
to
to
to
to
to
to
to
to
to
to
66
59
49
39
29
17
9
–1
–11
–21
–31
A–4 StorageWorks Product Specifications
to
to
to
to
to
to
to
to
to
to
to
151
139
121
103
85
64
49
31
13
–5
–21
Glossary
ac distribution
The method of distributing ac power in a cabinet.
adapter
See SCSI signal bus converter.
ANSI
American National Standards Institute
Battery backup unit
See BBU.
BBU
Battery backup unit. StorageWorks power unit option that extends power
availability after the loss of primary ac power or a power supply to protect
against the corruption or loss of data.
Note
The BBU does not provide power for the operation of a storage device. It
only provides power for protecting data.
building block shelf
See SBB.
cold-swap
A method of device replacement that requires that power be removed from
one or more shelves in a cabinet thereby affecting other devices therein. User
applications that are not dependent upon the devices being swapped are
impacted as a result. This method is used when conditions preclude the use of
a warm-swap or hot-swap method. Normally, this method is only used when
installing or upgrading a StorageWorks subsystem.
See also warm-swap and hot-swap.
controller
A hardware/firmware device that manages communications on behalf of host
systems over the SCSI bus to devices, such as the HSC–series, HSJ–series, and
HSZ–series controllers. Controllers typically differ by the type of interface to the
host and provide functions beyond what the devices support.
Glossary–1
controller and SBB shelf
A generic reference to a StorageWorks shelf that can contain both controller SBBs
and storage SBBs, for example, a BA350–EA shelf.
controller shelf
Any StorageWorks shelf that contains only ] controllers and cache memories, for
example, a BA350–MA shelf.
deskside expansion unit
The StorageWorks floor mounted stand stand that encloses a BA350–SA SBB
shelf. Two units are used to enclose a BA350–EA controller and SBB shelf.
differential SCSI bus
A signal’s level is determined by the potential difference between two wires.
A differential bus is more robust and less subject to electrical noise than is a
single-ended bus.
disk
A storage device supporting random access to fixed size blocks of data.
DWZZA
The StorageWorks compatible SCSI bus signal converter.
See SCSI bus signal converter.
electromagnetic interference
See EMI.
electrostatic discharge
See ESD.
EMI
Electromagnetic interference. The impairment of a signal by an electromagnetic
disturbance.
ESD
Electrostatic discharge. The discharge of a potentially harmful static electric
voltage as a result of improper grounding.
full-height
(1) In the storage industry, a device of conventional dimensions. (2) A single
device mounted in an 5¼-inch SBB. Full-height devices have an order number
suffix of "VA."
half-height
(1) In the storage industry, a device of conventional dimensions, except for height.
(2) A device that occupies only one-half of a 5¼-inch SBB. The first half-height
device is always mounted in the lower (bottom) part of the SBB. The second
device in an SBB is mounted in the upper (top) part of the SBB.
host
The primary or controlling computer or any such (in a multiple computer
network) to which storage is attached.
Glossary–2
hot-swap
A method of device replacement whereby the complete system remains on line
and active during device removal or insertion. The device being removed or
inserted is the only device that cannot perform operations during this process.
User applications that are not dependent upon the device being swapped are not
impacted.
See also cold-swap and warm-swap.
logical bus
A single-ended, physical bus connected to a differential, physical bus by a SCSI
bus signal converter.
physical bus
Two SCSI terminators separated by a cables, connectors, and backplane circuitry.
RAID
Redundant Array of Independent Disks
SBB
StorageWorks building block. The basic building block of the StorageWorks
product line. Any device conforming to shelf mechanical and electrical standards
installed in either a 3½-inch or 5¼-inch carrier is considered to be an SBB,
whether it be a storage device, a power supply, or other device.
SBB shelf
The common name for any StorageWorks shelf that contains only power supply
and storage SBBs.
SCSI
Small Computer System Interface. This ANSI interface defines the physical
and electrical parameters of a parallel I/O bus used to connect computers and a
maximum of seven devices. The StorageWorks subsystem implementation uses
SCSI–2, for the synchronous transfer of 8-bit data at rates of up to 10 MB/s.
SCSI bus signal converter
Sometimes referred to as an adapter. (1) A connecting device that permits the
attachment of accessories or provides the capability to mount or link units. (2)
The device that connects a 16-bit, differential SCSI bus operating in the 8-bit
mode to an 8-bit, single-ended SCSI bus.
SCSI busing connection
A connection in the SCSI bus between two terminators such as the SBB shelf
SCSI input connector.
SCSI device
A host computer adapter, a peripheral controller, or an intelligent peripheral that
can be attached to the SCSI bus.
SCSI device ID
The bit-significant representation of the SCSI addressing referring to one of the
signal lines numbered 0 through 7. Also referred to as target ID.
Glossary–3
SCSI device-side device address
The eight device addresses (target IDs) assigned to the SCSI controller and the
devices it controls.
See also SCSI host-side device address.
SCSI end-bus position
The physical location of a controller, a SCSI bus controller, or a device that
contains the bus terminator.
SCSI host-side device address
The eight device addresses (target IDs) assigned to the host device and the SCSI
controllers and the devices it controls.
See also SCSI device-side device address.
SCSI mid-bus
The physical location of a controller or a device that the SCSI bus passes through
enroute to the controller or device that contains the SCSI bus termination.
SCSI–A cable
A 50-conductor (25 twisted pair) cable used for single-ended, SCSI–2 bus
connections.
SCSI–P cable
A 68-conductor (34 twisted pairs) cable used for differential bus connections.
single-ended SCSI bus
Each signal’s logic level is determined by the voltage of a single wire in relation
to ground.
Small Computer System Interface
See SCSI.
StorageWorks
The Digital set of enclosure products that allows customers to design and
configure their own storage subsystem. Components include power, packaging,
and interconnections in a StorageWorks shelf. SBBs and array controllers are
integrated therein to form storage subsystems. System-level enclosures to house
the shelves and standard mounting devices for SBBs are also included.
StorageWorks building block
See SBB.
tape
A storage device supporting sequential access to variable sized data records.
tape controller
See controller.
target
A SCSI device that performs an operation requested by an initiator.
Glossary–4
target ID
See SCSI device ID.
warm-swap
A method of device replacement whereby the complete system remains on line
during device removal or insertion. Activity may be suspended or paused for a
brief period of time during device insertion or removal. No booting or loading
of code is permitted except on the device being inserted. User applications that
are not dependent upon the devices on the affected SCSI bus are not noticeably
impacted.
See also cold-swap and hot-swap.
Glossary–5
Index
B
P
BA35X–HA power supply
specifications, A–1
BA35X–HB power supply
specifications, A–1
Battery backup unit
See BBU
BBU
replacing, 4–6
Blowers
replacing, 3–4
Physical specifications
cabinets, A–2
SBBs, A–2
shelves, A–2
Power requirements, A–1
Power supplies
BA35X–HA, A–1
BA35X–HB, A–1
specifications, A–1
Power supply
DWZZA–VA SCSI bus signal converter, 6–6
C
Configuration rules
multiple SBB shelves, 5–9
single SCSI bus, 5–7
single SCSI bus, multiple shelves, 5–9
two SCSI buses, 5–8
D
Device ID
DWZZA–VA SCSI bus signal converter, 6–2
DWZZA SCSI bus signal converter
disassembly, 6–6, 6–8
DWZZA SCSI bus signal converters, 6–1
DWZZA–VA SCSI bus signal converter
device ID, 6–2
power supply, 6–6
SCSI cables, 6–5
E
Environmental specifications, A–3
Environmental stabilization, A–4
L
LEDs
See Storage SBB LEDs
R
Removing SBBs
procedure for, 3–2
Replacement
shelf, 3–5
Replacing SBBs
cold-swap method, 3–2
hot-swap method, 3–2
procedure for, 3–2
warm-swap method, 3–2
S
SBBs
specifications, A–2
SCSI bus
description, 5–1
length, 5–5
single shelf
single bus, 5–5
two buses, 5–5
two shelves
single bus, 5–5
SCSI bus configuration
terminators, 6–6
SCSI bus configuration, single bus
procedure, 5–7
SCSI bus configuration, single bus, multiple
shelves
procedure, 5–9
Index–1
SCSI bus configuration, two buses
procedure, 5–8
SCSI bus signal converters, 6–1
SCSI cables
used with DWZZA–VA SCSI bus signal
converter, 6–5
Shelf
replacement, 3–5
Shelf status, 2–2
BBU faults, 2–12
BBU LEDs, 2–12, 4–4
BBU status, 4–4
power supply faults, 2–8
power supply LEDs, 2–8
shelf faults, 2–8
single power supply
power supply faults, 2–8
power supply status, 4–3
shelf faults, 2–8
shelf status, 4–3
Shelves
physical specifications, A–2
Specifications
environmental, A–3
Index–2
environmental stabilization, A–4
Storage SBB LEDs, 2–10
SBB active LED, 2–10
SBB fault LED, 2–10
storage SBB faults, 2–10
Storage SBB status, 2–10
SBB replacement, 3–1
SWAP signal, 3–1
StorageWorks
specifications, A–1
physical, A–2
System building blocks
See SBBs
T
Temperature
ranges, A–4
Terminators
power supply, 6–6
SCSI bus, 6–6
Thermal stabilization, A–4

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