SS6000 User Guide, Revision B

DataDirect Networks, Inc
StorageScaler 6000
Drive Enclosure
User Guide
96-00189-001 Rev B
March, 2010
96-00189-001 REV B
Notices
The information in this document is subject to change without notice.
While every effort has been made to ensure that all information in this document is accurate, DataDirect
Networks accept no liability for any errors that may arise.
No part of this document may be transmitted or copied in any form, or by any means, for any purpose,
without the written permission of DataDirect Networks.
March, 2010
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96-00189-001 Rev B
Contents
Table of Contents
1
Introduction ..................................................................................................................................... 1
1.1 The StorageScaler 6000 System ................................................................................................ 1
1.2 Enclosure Core Product .............................................................................................................. 2
1.2.1
Enclosure Chassis .............................................................................................................. 2
1.3 The Plug-in Modules ................................................................................................................... 3
1.3.1
Power Cooling Module (PCM) ............................................................................................ 3
1.3.2
Input/Output (I/O) Module ................................................................................................... 4
1.3.3
Drive Carrier Module and Status Indicator ......................................................................... 5
1.3.4
DEM Card ........................................................................................................................... 6
1.4 Front Panel Indicators ................................................................................................................. 7
1.5 Environment ................................................................................................................................ 8
1.6 StorageScaler 6000 Technical Specification ............................................................................... 9
1.6.1
Dimensions ......................................................................................................................... 9
1.6.2
Weight ................................................................................................................................ 9
1.6.3
AC INPUT PCM .................................................................................................................. 9
1.6.4
DC INPUT PCM ............................................................................................................... 10
1.6.5
DC OUTPUT PCM ........................................................................................................... 10
1.6.6
PCM Safety and EMC Compliance .................................................................................. 10
1.6.7
Power Cord ...................................................................................................................... 10
2
Getting Started ..............................................................................................................................
2.1 Planning Your Installation ..........................................................................................................
2.1.1
Enclosure Bay Numbering Convention ............................................................................
2.2 Enclosure Installation Procedures .............................................................................................
2.3 I/O Module Configurations ........................................................................................................
2.3.1
Controller Options ............................................................................................................
2.4 DEM ..........................................................................................................................................
2.5 Drive Enclosure Device Addressing ..........................................................................................
2.6 Grounding Checks .....................................................................................................................
11
11
12
14
14
14
15
15
15
3
Operation .......................................................................................................................................
3.1 Before You Begin ......................................................................................................................
3.2 Power On / Power Down ...........................................................................................................
3.2.1
PCM LEDs ........................................................................................................................
3.2.2
I/O Panel LEDs .................................................................................................................
17
17
17
17
18
4
Troubleshooting and Problem Solving .......................................................................................
4.1 Overview ...................................................................................................................................
4.2 Initial Start-up Problems ............................................................................................................
4.2.1
Faulty Cords .....................................................................................................................
4.2.2
Alarm Sounds On Power Up ............................................................................................
4.2.3
Green “Signal Good” LED on I/O Module Not Lit .............................................................
4.2.4
Computer Doesn’t Recognize the Storage Scaler 6000 Subsystem ...............................
4.3 LEDs ..........................................................................................................................................
4.3.1
HDD (Hard Disk Drive) .....................................................................................................
4.3.2
PCM (Power Cooling Module) ..........................................................................................
4.3.3
DEM (Drive Expander Module) ........................................................................................
19
19
19
19
19
19
20
20
20
21
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DataDirect Networks StorageScaler 6000 User Guide Rev B
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4.3.4
I/O Module .......................................................................................................................
4.3.5
Front Panel Drive Activity Indicators ................................................................................
4.4 Troubleshooting ........................................................................................................................
4.4.1
Thermal Control ...............................................................................................................
4.4.2
Thermal Alarm .................................................................................................................
4.4.3
Thermal Shutdown ...........................................................................................................
4.5 Dealing with Hardware Faults ...................................................................................................
4.6 Replacing a Module ..................................................................................................................
4.6.1
Power Cooling Modules ...................................................................................................
4.6.2
I/O Module .......................................................................................................................
4.6.3
Replacing the Drive Carrier Module .................................................................................
4.7 Replacing the DEM ...................................................................................................................
22
23
24
24
25
25
26
26
26
28
29
30
Appendix A Tier Mapping .................................................................................................................. 31
Appendix B Rack Mounting ............................................................................................................... 37
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DataDirect Networks StorageScaler 6000 User Guide Rev B
Preface
Preface
What is in this guide
This user guide gives you step-by-step instructions on how to install, configure, and connect the
StorageScaler 6000 storage subsystem to your host computer system, as well as to use and maintain the
system.
Who should use this guide
This user guide assumes that you have a working knowledge of the Serial Attached SCSI (SAS) protocol
environments into which you are installing the StorageScaler 6000 system.
International Standards
The StorageScaler 6000 storage system complies with the requirements of the following agencies and
standards:
• CE
• UL
Potential for Radio Frequency
Interference
USA Federal Communications Commission (FCC)
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. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Properly shielded and grounded cables and connectors must be used in order to meet FCC emission
limits. The supplier is not responsible for any radio or television interference caused by using other than
recommended cables and connectors or by unauthorized changes or modifications to this equipment.
Unauthorized changes or modifications could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
European Regulations
This equipment complies with European Regulations EN 55022 Class A: Limits and Methods of
Measurement of Radio Disturbance Characteristics of Information Technology Equipment and EN500821: Generic Immunity.
DataDirect Networks StorageScaler 6000 User Guide Rev B
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Preface
Qualified Personnel
Qualified personnel are defined as follows:
• Service Person: A person having appropriate technical training and experience necessary to be
aware of hazards to which that person may be exposed in performing a task and of measures to
minimize the risks to that person or other persons.
• User/Operator: Any person other than a Service Person.
Safe Handling
• Remove drives to minimize weight.
• Do not try to lift the enclosure by yourself.
• Do not lift the StorageScaler 6000 by the handles on the power cooling module (PCM); they are not
designed to support the weight of the populated enclosure.
Weight Handling Label: Lifting and Tipping
Safety
Important
Warning
If this equipment is used in a manner not specified by the manufacturer, the protection provided
by the equipment may be impaired.
The StorageScaler 6000 enclosure MUST be grounded before applying power.
Unplug the unit if you think that it has become damaged in any way and before you move it.
Caution
Plug-in modules are part of the fire enclosure and must only be removed when a replacement can be
immediately added. The system must not be run without all units in place. Operate the system with the
enclosure top cover closed.
• In order to comply with applicable safety, emission and thermal requirements no covers should be
removed.
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DataDirect Networks StorageScaler 6000 User Guide Rev B
Preface
• The StorageScaler 6000 unit must only be operated from a power supply input voltage range of 200
V AC to 240 V AC.
• The plug on the power supply cord is used as the main disconnect device. Ensure that the socket
outlets are located near the equipment and are easily accessible.
Warning
To ensure protection against electric shock caused by HIGH LEAKAGE CURRENT (TOUCH
CURRENT), the StorageScaler 6000 must be connected to at least two separate and independent
sources. This is to ensure a reliable earth connection.
Warning
The equipment is intended to operate with two (2) working PCMs. Before removing a PCM, please
disconnect the power from the power supply, by either the switch (where present) or by physically
removing the power source, prior to removing the PCM from the enclosure/shelf.
• Do not remove a faulty PCM unless you have a replacement unit of the correct type ready for
insertion.
• A safe electrical earth connection must be provided to the power cord.
• Provide a suitable power source with electrical overload protection to meet the requirements laid
down in the technical specification.
Warning
Do not remove covers from the PCM. Danger of electric shock inside. Return the PCM to your
supplier for repair.
PCM Safety Label: Electric Shock Hazard Inside
Warning
Operation of the Enclosure with ANY modules missing will disrupt the airflow and the drives will
not receive sufficient cooling. It is ESSENTIAL that all apertures are filled before operating the
unit.
Recycling of Waste Electrical and Electronic
Equipment (WEEE)
At the end of the product’s life, all scrap/ waste electrical and electronic equipment should be recycled in
accordance with National regulations applicable to the handling of hazardous/ toxic electrical and
electronic waste materials.
Please contact your supplier for a copy of the Recycling Procedures applicable to your product.
Important
Observe all applicable safety precautions, e.g. weight restrictions, handling batteries and lasers
etc, detailed in the preceding paragraphs when dismantling and disposing of this equipment
DataDirect Networks StorageScaler 6000 User Guide Rev B
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Preface
Rack System Precautions
The following safety requirements must be considered when the unit is mounted in a rack.
• The rack construction must be capable of supporting the total weight of the installed enclosure(s)
and the design should incorporate stabilizing features suitable to prevent the rack from tipping or
being pushed over during installation or in normal use.
• When loading a rack with the units, fill the rack from the bottom up and empty from the top down.
• Always remove all modules and drives, to minimize weight, before loading the chassis into a rack.
Warning
It is recommended that you do not slide more than one enclosure out of the rack at a time, to avoid
danger of the rack tipping over.
• When mounting in a rack, ensure that the enclosure is pushed fully back into the rack.
• The system must be operated with low pressure rear exhaust installation. (The back pressure
created by rack doors and obstacles should not exceed 5 pascals [0.5mm water gauge].)
• The rack design should take into consideration the maximum operating ambient temperature for the
unit is 35°C.
• The rack should have a safe electrical distribution system. It must provide over current protection for
the unit and must not be overloaded by the total number of units installed in the rack. Consideration
of the units nameplate rating should be used when addressing these concerns.
• The electrical distribution system must provide a reliable earth ground for each unit and the rack.
• Each power supply in each unit has an earth leakage current of 1.5mA. The design of the electrical
distribution system must take into consideration the total earth leakage current from all the power
supplies in all the units. The rack will require labelling with “HIGH LEAKAGE CURRENT. Earth
connection essential before connecting supply.”
• The rack when configured with the units must meet the safety requirements of UL 60950 and IEC
60950.
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DataDirect Networks StorageScaler 6000 User Guide Rev B
Preface
Cover Label
ESD Precautions
Caution
It is recommended that you fit and check a suitable anti-static wrist or ankle strap and observe all
conventional ESD precautions when handling StorageScaler 6000 plug-in modules and components.
Avoid contact with backplane components and module connectors, etc.
Data Security
• Power down your host computer and all attached peripheral devices before beginning installation.
• Each enclosure contains up to 60 removable disk drive modules. Disk units are fragile. Handle them
with care, and keep them away from strong magnetic fields.
• All the supplied plug-in modules and blanking plates must be in place for the air to flow correctly
through the enclosure and also to complete the internal circuitry.
• If the subsystem is used with modules or blanking plates missing for more than a few minutes, the
enclosure can overheat, causing power failure and data loss. Such use may also invalidate the
warranty.
• If you remove a drive module, replace it immediately. If it is faulty, replace it with a drive module of
the same type and capacity
DataDirect Networks StorageScaler 6000 User Guide Rev B
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Preface
• Ensure that all disk drives are removed from the enclosure before attempting to move the rack
installation.
• Do not abandon your backup routines. No system is completely foolproof.
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DataDirect Networks StorageScaler 6000 User Guide Rev B
Introduction
Chapter 1
Introduction
1.1 The StorageScaler 6000 System
The StorageScaler 6000 storage system is an ultra dense 4U 60 disk drive enclosure based on 3.5 inch
SAS or SATA Hard Disk Drives (HDDs). Figure 1–1 and Figure 1–2 show front and rear views of a
StorageScaler 6000 enclosure respectively. Module and major components and their locations are
shown in Figure 1–3.
Figure 1–1
The StorageScaler 6000 System - front open view
Figure 1–2
The StorageScaler 6000 System - rear isometric and rear views
DataDirect Networks StorageScaler 6000 User Guide Rev B
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StorageScaler 6000 User Guide (96-00189-001 Rev B)
1.2 Enclosure Core Product
The StorageScaler 6000 design concept is based on a subsystem together with a set of plug-in modules
and (as supplied) comprises:
• Enclosure Chassis with integral Front Panel Drive Status Indicator (Figure 1–10).
• Two (2) 1865W Power Cooling (PCM) plug-in modules (Figure 1–4).
• Two (2) plug-in Input/Output (I/O) modules (Figure 1–6).
• A midplane separates the front and back of the chassis and provides the interconnect system
between the PCMs, I/O modules, and the baseboard.
• Up to 60 top loadable HDDs in a 5x12 matrix.
• Eight (8) SAS DEMs.
1.2.1 Enclosure Chassis
The chassis assembly contains 60 drive bays at the front, each of which accommodates a plug-in drive
carrier module capable of holding a 3.5 inch SAS or SATA Hard Disk Drive (HDD). The 60 drive bays are
arranged in five rows of twelve drives (5x12). At the rear, the chassis assembly contains two (2) PCMs
and two (2) I/O modules (Figure 1–3). The chassis is fitted with 19-inch rack mounting features which
enables it to be fitted to 19-inch racks and uses four (4) EIA units of rack space.
I/O-B
30 Drive Bays
PCM-2
8 DEMs
PCM-1
REAR
FRONT
I/O-A
30 Drive Bays
Figure 1–3
2
StorageScaler 6000 Module Locations (Top View)
DataDirect Networks StorageScaler 6000 User Guide Rev B
Introduction
1.3 The Plug-in Modules
The StorageScaler 6000 Enclosure requires the following modules for normal operation:
• Power Cooling Module (PCM)
• Input/Output Module (I/O)
• Drive Carrier Module
• DEM
1.3.1 Power Cooling Module (PCM)
Two (2) auto ranging AC 1865W Power Cooling modules (Figure 1–4) are supplied already mounted in
the rear of the enclosure as part of the subsystem core product.
Figure 1–4
Power Cooling Module (1)
.
The StorageScaler 6000 must always be operated with two (2) Power Cooling Modules fitted (2 PCMs).
Module replacement should only take a few minutes to perform but must be completed within 10 minutes
from removal of the failed module. Four (4) LEDs mounted on the PCM (Figure 1–5 and Table 1–1)
indicate the status of the PCM and the fans. PCM voltage operating ranges are nominally 200V to 240V
AC.
Figure 1–5
PCM LEDs View: Normal/Faults
PCM LEDs
Normal Operation LEDs
DataDirect Networks StorageScaler 6000 User Guide Rev B
Faults LEDs
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StorageScaler 6000 User Guide (96-00189-001 Rev B)
Table 1–1
PCM LEDs
ICON LED
Description
COLOR
Normal Behavior
PCM AC ok
GREEN
ON-AC input to PCM within tolerances.
OFF-failed PCM
PCM DC ok
GREEN
ON-DC output of PCM within tolerances.
OFF-failed PCM
PCM Fault
AMBER
ON-PCM fault detected
OFF-no detected PCM faults.
PCM ID
BLUE
ON-receiving SES Identify command
OFF-NOT receiving SES Identify command
1.3.2 Input/Output (I/O) Module
The StorageScaler 6000 storage subsystem includes an enclosure with rear facing bays which house
two (2) I/O modules (Figure 1–6). Processors housed on the I/O modules provide enclosure
management and interface to devices on the Backplane, PCM, and Display Panel in order to monitor
internal functions. The plug-in I/O modules have been designed for integration into a StorageScaler 6000
storage subsystem, providing external SAS cable interfacing with up to 60 SAS or SATA disk drives.
Host Port 1
Expansion Port 1
Host Port 2
Expansion Port 2
Figure 1–6 I/O Module
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DataDirect Networks StorageScaler 6000 User Guide Rev B
Introduction
I
Table 1–2 defines the LED indicators incorporated on the I/O module.
Table 1–2
I/O Module LEDs
LED
Description Color
Host Port 1
Expansion Port 1
Host Port 2
Expansion Port 2
SAS Link Green
ON-a valid SAS link established on at least 1 of the 4
SAS links of the 4-wide SAS port
OFF-no SAS links
Host Port 1
Expansion Port 1
Host Port 2
Expansion Port 2
SAS Link Fault Amber
ON-a detectable fault on at least 1 of the 4 SAS links
of the 4-wide SAS port
OFF-no detectable faults
I/O Module OK Green
ON-properly booted and functioning correctly
OFF-I/O Module internal fault
I/O Module Fault Amber
I/O Module Identify Blue
Normal Behavior
ON-I/O module fault detected
OFF-no detected I/O module faults
ON-receiving SES Identify command
OFF-NOT receiving SES Identify command
1.3.3 Drive Carrier Module and Status Indicator
The Drive Carrier Module comprises a hard disk mounted in a carrier (Figure 1–7). Each drive bay can
house a single Low Profile 1.0 inch high, 3.5 inch form factor disk drive in its carrier. A fully loaded
enclosure contains 60 drive carrier modules.
The handle provides the following functions:
• Camming of carrier into and out of drive bays.
• Positive 'spring loading' of the drive/baseplane connector.
• The handle assembly also incorporates a Drive Status LED (Figure 1–7).
Note
The enclosure system design allows for drive bays to be left empty without the need for fitting dummy
drive carriers.
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StorageScaler 6000 User Guide (96-00189-001 Rev B)
LED
Figure 1–7
1.3.3.1
Drive Carrier Module: Closed and Opened
SATA Interposer Card
The StorageScaler 6000 enclosure supports a SATA interposer card which allows simultaneous access
to the SATA HDD from both IO modules installed in the enclosure as well as the power cycling of a single
HDD through SES commands.
Note
A SATA interposer card is required to run SATA HDDs.
1.3.4 DEM Card
The StorageScaler 6000 enclosure contains eight (8) top-loadable, hot-swappable DEMs. The DEMs
(Figure 1–8) provide the SAS connectivity between the I/O module and the HDDs located within the
enclosure.
Locking Mechanism
Figure 1–8
Note
DEM
The DEM is a serviceable PCB which may be replaced by trained personnel.
Each DEM connects to a single port of the HDD based on the location within the enclosure within which
it is installed (Figure 1–9). Each provides power control signals to each drive slot. It controls HDD identify/
service LEDs and monitors the status from partner DEM. Each pair of DEMs supports 15 drives; there
are 8 DEMs in a fully configured system.
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DataDirect Networks StorageScaler 6000 User Guide Rev B
Introduction
Figure 1–9
Note
Drive Carrier and DEM Locations
In some components, the failure LED is internal to the enclosure and visible only when the cover is open.
The Internal LED indicators are explained in Table 1–3.
Table 1–3 INTERNAL LED Indicators
Description
Location
Color
Normal Behavior
DEM DC
DEM internal to
enclosure
GREEN
ON-1.2VDC regulator circuit correctly functioning
OFF- faulty 1.2VDC regulator circuit
DEM ID
DEM internal to
enclosure
BLUE
ON-receiving SES Identify command
OFF-NOT receiving SES Identify command
HDD ID
HDD internal to
enclosure
BLUE
ON-receiving SES Identify command
OFF-NOT receiving SES Identify command
1.4 Front Panel Indicators
Note
The Front Panel is an integral part of the enclosure chassis assembly and is not field replaceable.
The Front Panel Indicators show the aggregated status of all the modules and drive activity. This panel
and its associated LEDs are shown in Figure 1–10. The Front Panel LEDs are defined in Table 1–4.
Figure 1–10
Front Panel Indicators
DataDirect Networks StorageScaler 6000 User Guide Rev B
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StorageScaler 6000 User Guide (96-00189-001 Rev B)
Table 1–4
ICON
Display Panel LEDs
LABEL
COLOR
Definition
Normal Behavior
Shelf
Identify
(Note 1)
AMBER
Enclosure Identify
ON-SES is sending an Identify
command.
OFF-SES is NOT sending an Identify
command
System Fault
AMBER
Enclosure Fault
ON-one or more components within
enclosure have failed. A service action is
required. Exact failed component has its
own amber fault LED lit.
OFF-no detectable faults
System Power GREEN
Enclosure Powered ON - DC power is present
ON
OFF - DC power is NOT present
LED does NOT flash under normal
operating conditions.
Cover Open
Enclosure cover is
open
AMBER
OFF-both cover pieces securely closed
and latched in place.
ON-either of the cover pieces is NOT
securely closed and latched in place
Note: The baseplane incorporates an Audible Alarm. This alarm is used to indicate a “cover open”
condition. To silence alarm, close the cover.
Individually
numbered
DEM Fault
(Note 2)
AMBER
DEM fault
OFF-all DEMs operating correctly.
ON-at least one DEM has failed; service
action required
Drive Fault
(Note 3)
AMBER
Drive fault
ON-one or more HDDs are faulted. SES
must determine exact HDD.
OFF-no detectable drive faults
HDDs
GREEN
HDD activity
ON-indicates HDD activity
OFF-no HDD activity
Note 1: not currently implemented
Note 2:
not currently implemented
Note 3: not currently implemented
1.5 Environment
The enclosure and all of its sub-components are compliant to the European Union RoHS (Restriction of
Hazardous Substances) Directive (Directive 2002/95/EC) with no exceptions or exemptions.
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DataDirect Networks StorageScaler 6000 User Guide Rev B
Introduction
1.6 StorageScaler 6000 Technical
Specification
1.6.1 Dimensions
Enclosure
inches
millimeters
Height
6.97
177
Width front
16.56
420.6
Width rear
17.56
446
Depth
front surface of bezel to end of cable management arms
42
1067
LENGTH
rack mounting surface to rear connectors surface
36
914
1.6.2 Weight
Item
Quantity per System
LBS (kg)
Extended Weight
Chassis
Includes
Base PCB & Midplane
1
83
83
PCM
2
12
24
I/O Module Drives
Miscellaneous
2
4
8
60
2
120
1
5
5
Total Weight
240
1.6.3 AC INPUT PCM
Input Parameter
Value
Input Voltage
190 - 264 VAC
Input Frequency
47 - 63 Hz and 400 hz
Maximum Input Current
13.1A RMS @ 190 VAC
Peak Inrush Current
50A @ 230VAC, 250C, 5 msec max
Minimum Efficiency
measured at 30% and 50%
load and nominal line
(208 VAC)
90%
Maximum Average Output Power
1750 W
Maximum Peak Output Power, 1 second
1922W
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StorageScaler 6000 User Guide (96-00189-001 Rev B)
1.6.4 DC INPUT PCM
Input Parameter
Value
Input Voltage
36 - 72 VAC
Maximum Input Current
TBD
Peak Inrush Current
TBD
Minimum Efficiency
measured at 30% and 50%
load and nominal line
(48 DVC)
90%
Maximum Average Output Power
1750 W
Maximum Peak Output Power, 1 second
1922W
1.6.5 DC OUTPUT PCM
Output Parameter
3.3 VDC Output
5 VDC Output
12 VDC Output
Normal Voltage
3.3 VDC
5.10 VDC
12.10 VDC
Full Load
5.0A
55.0A
120.0A
Peak Load for 1 Second
5.0A
65.0A
130.0A
Minimum Load (A)
0.0A
0.0A
0.0A
1.6.6 PCM Safety and EMC Compliance
Safety Compliance
UL 60950
IEC 60950
EN 60950
EMC Compliance
CFR47 Part 15B Class A
EN55022
EN55024
1.6.7 Power Cord
(minimum requirements)
Note
10
Cord Type
SV or SVT, 18 AWG minimum, 3 conductor
Plug
250V, 10A
Socket
IEC 320 C-14, 250V, 15A
Power cord is not included in the standard StorageScaler 6000 enclosure package.
DataDirect Networks StorageScaler 6000 User Guide Rev B
Getting Started
Chapter 2
Getting Started
2.1 Planning Your Installation
Before you begin installation you should become familiar with the configuration requirements of your
StorageScaler 6000 system and the correct positions of each of the optional plug-in modules (Table 2–1).
.
Table 2–1
StorageScaler 6000 Configuration
Module
Location
Drive Bays
You can install from 1 - 60 drives in the enclosure.
In 1x mode, (connected to 10 enclosures), you can install any
number of drives in the enclosure, but every enclosure should have
the same number of drives.
In 2x mode, (connected to 5 enclosures), you must install drives in
multiples of two (2).
In 4x mode, (connected to 3 enclosures), you must intall drives in
multiples of four (4).
Power Cooling Modules (PCM)
Two (2) PCMs must be fitted. Full power and cooling redundancy is
provided while a faulty module is replaced. Install the PCMs in lower
rear bays A and B.
Note: Rear bays are numbered from A and B starting from the
left when viewed from the back.
I/O Module
One or two I/O modules should be Installed in the upper rear bays
A & B.
Note: If only one module is installed, it should be fitted in
Module Location A and a blank plate must be fitted over
the unused bay.
DataDirect Networks StorageScaler 6000 User Guide Rev B
11
Bay B
I/O
Bay A
I/O
Figure 2–1
DEM Pair Locations
2.1.1 Enclosure Bay Numbering Convention
Warning
Operation of the Enclosure with ANY of the plug-in modules missing from the rear of the
enclosure will disrupt the airflow and the drives will not receive sufficient cooling. It is
ESSENTIAL that all (rear) apertures are filled before operating the unit.
The StorageScaler 6000 subsystem is housed in a 60-drive bay enclosure, arranged in four (4) groups.
Each group comprises two banks of 15 bays, that is, (as viewed from the front): 12 bays across the
enclosure by 5 bays deep. There are two numbering schemes: 1x60 and 2x30. The drive bays are
numbered in accordance with the tables shown in Figure 2–2 and Figure 2–3, when viewed from above.
Note
12
Drive 61 is optional drive.
DataDirect Networks StorageScaler 6000 User Guide Rev B
Getting Started
Figure 2–2 1X60 Drive Numbering Table.
Figure 2–3 2x30 Drive Numbering Table
DataDirect Networks StorageScaler 6000 User Guide Rev B
13
2.2 Enclosure Installation Procedures
Warning
The StorageScaler 6000 Enclosure with all its component parts installed is too heavy for a single
person to easily install into a Rack cabinet.
Caution
Ensure that you have fitted and checked a suitable anti-static wrist or ankle strap and observe all
conventional ESD precautions when handling StorageScaler 6000 modules and components. Avoid
contact with Backplane components and module connectors, etc.
Note
StorageScaler 6000 enclosures are supplied and delivered populated with Backplane, Baseplane, Front
Panel, DEMs, and with PCMs installed. The Drive Carrier Modules are supplied as a separate package.
The StorageScaler 6000 enclosure is in compliance with EIA-310-D “Cabinets, Racks, Panels, and
Associated Equipment”. The enclosure is designed to fit within a 4U rack space. A typical rack mounting
installation in shown in Figure 2–4.
Figure 2–4
Full Rack without 9900 controllers.
2.3 I/O Module Configurations
2.3.1 Controller Options
The StorageScaler 6000 has a standard SAS JBOD IO controller, which employs a 36-port expander with
zoning. The zoning is implemented via a preset piano-switch located on the enclosure baseboard. Host
ports 1 and 2 present drives 1 through 30 and host ports 3 and 4 present drives 31 through 60. Each host
port responds with drive information applicable only to the drives presented on the respective zone and
enclosure status information for the entire enclosure.
14
DataDirect Networks StorageScaler 6000 User Guide Rev B
Getting Started
2.4 DEM
The StorageScaler 6000 enclosure contains eight (8) top-loadable, hot swappable DEMs. The DEMs
provide the SAS connectivity between the I/O module and the HDDs located within the enclosure. Each
DEM connects to a single port of the HDD based on the location within the enclosure in which it is
installed. Each of the eight DEMS installed in the enclosure has a unique I2C and SAS address based on
a DataDirect Network SAS address generation scheme.
2.5 Drive Enclosure Device Addressing
See Appendix A.
2.6 Grounding Checks
The product must only be connected to a power source that has a safety electrical earth connection.
Warning
If more than one product is fitted in a rack, the earth connection to the rack is even more
important, because the rack will then have a high “EARTH LEAKAGE CURRENT” (“TOUCH
CURRENT”).
The earth connection to the rack must be checked before switching on, by an electrical engineer who is
qualified to the appropriate local and National standards to perform the check.
DataDirect Networks StorageScaler 6000 User Guide Rev B
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16
DataDirect Networks StorageScaler 6000 User Guide Rev B
Operation
Chapter 3
Operation
3.1 Before You Begin
Before powering up the enclosure, please ensure that all the modules are firmly seated in their correct
bays.
3.2 Power On / Power Down
Caution
Do not operate the subsystem until the ambient temperature is within the specified operating range. If the
drives have been recently installed, ensure they have had time to acclimatize before operating them.
To Power On the enclosure.
1 Apply AC power to the enclosure.
2 Turn the PCMs to ON.
All LEDs on the I/O Panel should be lit (Green) when the enclosure power is activated (and the disk drive
motors should start).
Important
If AC power is lost for any reason, on restoration of power the enclosure will re-start
automatically.
To power the enclosure down, switch off the PCMs installed in the Enclosure.
3.2.1 PCM LEDs
The PCM incorporates 4 LEDs, located above the On/Off switch. Please refer to Figure 1–4 and Figure
1–5.
DataDirect Networks StorageScaler 6000 User Guide Rev B
17
3.2.2 I/O Panel LEDs
The I/O Panel LEDs fault and status conditions are shown in Figure 3–1.
Figure 3–1
I/O Panel LEDs
Table 3–1 defines the LED indicators incorporated on the I/O module.
I
Table 3–1
I/O Module LEDs
LED Color
18
STATUS
Definition
Host Port 1 Green
Expansion Port 1
Host Port 2
Expansion Port 2
ON
OFF
•Incoming signal is GOOD
•No connection or incorrect connection
Host Port 1 Amber
Expansion Port 1
Host Port 2
Expansion Port 2
ON
OFF
•Fault
•No faults
I/O Module Green
OK
ON
OFF
•properly booted and functioning correctly
internal fault
I/O Module Amber
Fault
OFF
ON
•No Faults present
I/O Fault
I/O Module Blue
Identify
ON
OFF
•Receiving SES Command
Not receiving SES Command
DataDirect Networks StorageScaler 6000 User Guide Rev B
Troubleshooting
Chapter 4
Troubleshooting and
Problem Solving
4.1 Overview
The Storage Scaler 6000 Drive Enclosure includes an Enclosure Services Processor and associated
monitoring and control logic to enable it to diagnose problems within the enclosure’s power, cooling, and
drive systems.
The sensors for power and cooling conditions are housed within the PCMs. Each unit is independently
monitored.
4.2 Initial Start-up Problems
4.2.1 Faulty Cords
First check that you have wired up the subsystem correctly. If:
• cords are missing or damaged,
• plugs are incorrect,
• cords are too short,
Call your supplier for a replacement.
4.2.2 Alarm Sounds On Power Up
The Audible Alarm sounds anytime the top cover is open. The alarm mutes automatically once the cover
is closed.
4.2.3 Green “Signal Good” LED on I/O Module Not Lit
Check to ensure that the cables have not been reversed during installation.
DataDirect Networks StorageScaler 6000 User Guide Rev B
19
4.2.4 Computer Doesn’t Recognize the Storage Scaler 6000
Subsystem
1
Check that the SAS interface cables from the Storage Scaler 6000 enclosure to the host computer, or
I/O controller, are fitted correctly.
2
Check that there is a valid SAS signal present at the I/O connector. If there is no signal present, ensure
the cable has been properly inserted.
3
Check the I/O module setup as follows:
– Ensure the I/O module has been correctly installed and all external links and cables are securely
fitted.
– Ensure the maximum cable length has not been exceeded.
4.3 LEDs
Green LEDs are always used for good or positive indication. Amber LEDs indicate there is a critical fault
present within the module. See specific LED tables for further information:
• Section 4.3.1, ”HDD (Hard Disk Drive)”
• Section 4.3.2, ”PCM (Power Cooling Module)”
• Section 4.3.3, ”DEM (Drive Expander Module)”
• Section 4.3.4, ”I/O Module”
• Section 4.3.5, ”Front Panel Drive Activity Indicators”
4.3.1 HDD (Hard Disk Drive)
When a HDD is faulted, Table 4–1 describes the fault LED behavior:
• Under Normal conditions, the LEDs should all be illuminated constant GREEN
• If a problem is detected, the color of the relevant LED will change to AMBER.
Table 4–1
HDD LEDs
Location
20
Color
Identifier
Behavior
Enclosure front
Amber
Enclosure fault
This LED is ON with a drive fault
Enclosure front
Amber
Drive fault
This LED is ON with a drive fault
DataDirect Networks StorageScaler 6000 User Guide Rev B
Troubleshooting
4.3.2 PCM (Power Cooling Module)
The PCM LEDs are shown in Table 4–2:
• Under Normal conditions, the LEDs should all be illuminated constant GREEN
• If a problem is detected, the color of the relevant LED will change to AMBER.
Table 4–2
PCM LEDs
Location
Color
LED Identifier
Behavior
FRONT Enclosure
Amber Enclosure fault
This LED is ON with a PCM fault.
REAR Enclosure
PCM
Amber PCM fault
REAR Enclosure
PCM
Green
AC OK
This LED is ON with a DC or fan fault.
This LED is OFF with an AC input failure.
REAR Enclosure
PCM
Green
DC OK
This LED is ON with an AC or fan fault.
This LED is OFF with an DC output failure
This LED is ON with an AC input, DC output,
fan or other PCM fault.
4.3.3 DEM (Drive Expander Module)
The DEM fault LEDs are explained in Table 4–3:
• Under Normal conditions, the LEDs should all be illuminated constant GREEN
• If a problem is detected, the color of the relevant LED will change to AMBER.
Table 4–3
DEM LEDs
Location
Color
LED Identifier
Behavior
FRONT Enclosure
Amber Enclosure fault
ON with a DEM fault.
FRONT Enclosure
Amber DEM fault
ON with a DEM fault.
Internal (DEM)
Enclosure
Amber DEM fault
ON with a DEM fault.
Internal (DEM)
Enclosure
Green
DC OK
ON when the DC voltage regulation is
within limits.
OFF with a DC output failure.
Internal (DEM)
Enclosure
Green
Expander MIPS
ready
ON when the expander internal processor
is booted and operating correctly.
OFF when the expander internal
processor is NOT booted or ready.
Internal (DEM)
Enclosure
BLUE
DEM identify
ON indicates that this DEM is being sent
an identify command by the SEP.
DataDirect Networks StorageScaler 6000 User Guide Rev B
21
4.3.4 I/O Module
The I/O Module LEDs are explained in Table 4–4.
• Under Normal conditions, the LEDs should all be illuminated constant GREEN
• If a problem is detected, the color of the relevant LED will change to AMBER.
Table 4–4
I/O LEDs
Location
22
Color
LED Identifier
Behavior
FRONT Enclosure
Amber Enclosure fault
ON with an I/O fault.
REAR Enclosure
Green
OFF when an I/O module detectable fault
is present.
INDEPENDENT of SAS link fault condition
and stays lit during a SAS link fault.
REAR Enclosure
Amber I/O fault
ON when a detectable fault is present in
the I/O module.
INDEPENDENT of SAS link fault condition
and stays lit during a SAS link fault.
REAR Enclosure
Green
ON when a valid link is present on any of
the 4 links of the 4-wide port.
OFF when none of the 4 links of the 4wide port have a valid connection.
REAR Enclosure
Amber SAS Link Fault
I/O OK
SAS Link
Activity
ON when a fault is present on any of the 4
links of the 4-wide port.
OFF when none of the 4 links of the 4wide port have a fault.
DataDirect Networks StorageScaler 6000 User Guide Rev B
Troubleshooting
4.3.5 Front Panel Drive Activity Indicators
The Front Panel Drive Activity Indicators show the aggregated status of all the modules. This panel and
its associated LEDs are shown in Figure 4–1. The Display Panel LEDs are defined in Table 4–5.
Figure 4–1
Front Panel Drive Activity Indicators Panel
Table 4–5
Display Panel LEDs
ICON
LABEL
COLOR
Definition
Shelf Identify
AMBER
enclosure Identify ON-SES is sending an Identify
command.
Currently not
implemented.
OFF-SES is NOT sending an
Identify command
System Fault
AMBER
Enclosure Fault
ON-one or more components
within enclosure have failed. A
service action is required. Exact
failed component has its own
amber fault LED lit.
OFF-no detectable faults
System Power
GREEN
Enclosure
Powered ON
ON - DC power is present
OFF - DC power is NOT present
LED does NOT flash under
normal operating conditions.
Cover Open
AMBER
Enclosure cover
is open
OFF-both cover pieces securely
closed and latched in place.
ON-either of the cover pieces is
NOT securely closed and
latched in place
DEM Fault
AMBER
DEM fault
OFF-all DEMs operating
correctly.
ON-at least one DEM has failed;
service action required
Currently not
implemented.
Drive Fault
AMBER
Drive fault
Currently not
implemented.
DataDirect Networks StorageScaler 6000 User Guide Rev B
Normal Behavior
ON-one or more HDDs are
faulted. SES must determine
exact HDD.
OFF-no detectable drive faults
23
4.4 Troubleshooting
The following sections describe common problems, with possible solutions, which can occur with your
Storage Scaler 6000 system
4.4.1 Thermal Control
The Storage Scaler 6000 Enclosure uses extensive thermal monitoring and takes a number of actions
to ensure component temperatures are kept low and also to minimize acoustic noise. Air flow is from the
front, over the drive section, through the midplane, through the I/O modules to rear of the enclosure.
Symptom
Cause
If the ambient air is cool
(below 25 °C) and the fans
are observed to increase in
speed, then some restriction
on airflow may be causing
additional internal
temperature rise.
The first stage in the thermal
control process is for the fans
to automatically increase in
speed when a thermal
threshold is reached. This
may be caused by higher
ambient temperatures in the
local environment and may
be perfectly normal.
Note: This is not a fault
condition.
Action
Note: This threshold
changes according to the
number of drives and PCMs
fitted.
1 Check the installation for any airflow
restrictions at either the front or rear
of the enclosure. A minimum gap of
25mm at the front and 50mm at the
rear is recommended.
2 Check for restrictions due to dust
build-up; clean as appropriate.
3 Check for excessive re-circulation of
heated air from rear to the front. Use
in a fully enclosed rack installation is
not recommended.
4 Check that all Blank modules are in
place.
5 Reduce the ambient temperature.
24
DataDirect Networks StorageScaler 6000 User Guide Rev B
Troubleshooting
4.4.2 Thermal Alarm
Symptom
• Display Panel PCM/
Cooling Fault LED.
• An AMBER LED on
one or more PCMs.
Cause
If the internal temperature
measured in the airflow through
the enclosure exceeds a preset threshold, a thermal alarm
will sound.
• Air temperature
exiting PCM above
35°C.
Action
1 Check local ambient environment
temperature is below the upper 40°C
specification.
2 Check the installation for any airflow
restrictions at either the front or rear
of the enclosure. A minimum gap of
25mm at the front and 50mm at the
rear is recommended.
3 Check for restrictions due to dust
build-up. Clean as appropriate.
4 Check for excessive re-circulation of
heated air from rear to the front. Use
in a fully enclosed rack installation is
not recommended.
5 If possible, shutdown the enclosure
and investigate the problem before
continuing.
4.4.3 Thermal Shutdown
Important
An Enclosure will shut down when a critical temperature threshold is exceeded in order to prevent
permanent damage to the disk drives.
DataDirect Networks StorageScaler 6000 User Guide Rev B
25
4.5 Dealing with Hardware Faults
Ensure that you have obtained a replacement module of the same type before removing any faulty
module.
Warning
If the Storage Scaler 6000 subsystem is powered up and you remove any module, replace it
immediately. If the subsystem is used with modules or module blanks missing for more than a
few minutes, the Enclosure can overheat, causing power failure and data loss. Such use will
invalidate the warranty.
• Replace a faulty drive with a drive of the same type and equal or greater capacity.
• All the supplied plug-in PCMs, electronics modules, and blank modules must be in place for the air
to flow correctly around the cabinet.
4.6 Replacing a Module
Warning
Whenever replacing a module NEVER leave an EMPTY bay in the rear of the enclosure, obtain a
replacement before removing the problem part.
Please refer to Chapter 2 , ”Getting Started” for information on the initial installation of the plug-in modules
in the Storage Scaler 6000 enclosure.
Warning
Observe all conventional ESD precautions when handling Storage Scaler 6000 modules and
components. Avoid contact with Backplane components and module connectors, etc.
4.6.1 Power Cooling Modules
Warning
Do not remove covers from the Power Cooling module (PCM). There is a danger of electric shock.
Return the PCM to your supplier for repair.
Warning
To ensure your system has warning of a power failure please disconnect the power from the
power supply, by either the switch (where present) or by physically removing the power source,
prior to removing the PCM from the enclosure/shelf. Do not remove the faulty PCM unless you
have a replacement unit of the correct type ready for insertion. The system must not be run
without all units in place.
If a power supply unit or its fan is faulty, you must replace the whole PCM. You must not take any longer
than 5 minutes to replace this unit to prevent the enclosure from over-heating.
To remove an AC PCM/Cooling Module- Handle Model:
If a power supply unit or its fan is faulty, you must replace the whole PCM/Cooling module.
As there should always be two PCMs installed, you can continue working while replacing the faulty
module.
26
1
Make sure you identify the faulty PCM correctly from the two modules installed.
2
Lift latch which secures the power supply cord.
3
Switch off and disconnect the power supply cord.
DataDirect Networks StorageScaler 6000 User Guide Rev B
Troubleshooting
4
Lift the PCM handle to the open position to cam the PCM out of the enclosure.
5
Grip the handle and withdraw the PCM.
To remove an AC PCM - Thumb Screw Model:
Warning
Do not remove the faulty PCM unless you have a replacement unit of the correct type ready for
insertion.
If a power supply unit or its fan is faulty, you must replace the whole PCM. As there should always be two
PCMs installed, you can continue working while replacing the faulty module.
1
Make sure you identify the faulty PCM correctly from the two modules installed.
2
Lift latch which secures the power supply cord.
3
Switch off and disconnect the power supply cord.
4
Remove the two thumbscrews on the right and left sides of the unit.
5
Firmly grip the handle on the bottom of the unit and withdraw the PCM.
To install an AC PCM - Handle Model:
6
Caution
Check for damage, especially to the rear connector on the PCM.
Handle the module carefully and avoid damaging the connector pins. Do not install the module if any pins
appear to be bent.
7
With the PCM handle in the open position, slide the module into the enclosure.
8
Cam the module home by manually closing the PCM handle. A click should be heard as the handle
latches engage.
9
Connect the power supply cord to the power source, secure the latch over the cord, and switch the power
supply ON.
Note
The alarm will sound until the new PCM is operating correctly.
To install an AC PCM - Thumbscrew Model:
1
Caution
Check for damage, especially to the rear connector on the PCM.
Handle the module carefully and avoid damaging the connector pins. Do not install the module if any pins
appear to be bent.
2
Slide the module into the enclosure and push unit you hear a click as the latch is engaged.
3
Secure the two thumbscrews on the left and right sides of the unit.
4
Connect the power supply cord to the power source; secure latch, and switch the power supply ON.
Note
The alarm will sound until the new PCM is operating correctly.
DataDirect Networks StorageScaler 6000 User Guide Rev B
27
4.6.2 I/O Module
Warning
Do not remove this module unless a replacement can be immediately added. The system must not
be run without all units in place.
To remove the I/O Module:
1
Release the two latches on the bottom of the unit by simply pulling each latch out and away from unit.
2
Pull the latches forward to cam the module out of the enclosure.
3
Grip the unit securely and withdraw the module.
To installing the I/O Module:
28
4
With the latches in the open position, slide the EBOD module into the enclosure until the latch engages
automatically.
5
Cam the module home by manually closing the latches. A click should be heard as the latch engages.
DataDirect Networks StorageScaler 6000 User Guide Rev B
Troubleshooting
4.6.3 Replacing the Drive Carrier Module
Warning
Observe all conventional ESD precautions when handling Storage Scaler 6000 modules and
components. Avoid contact with backplane components and module connectors, etc.
Instructions are also clearly labeled on the inside cover of the enclosures.
Figure 4–2
Caution
Drive Carrier - Handle Released
Drive spin down
Damage can occur to a drive if it is removed while still spinning. If possible, use the operating system to
spindown the drives prior to removal. If this is not possible, we recommend that you perform All steps of
the following procedure to ensure that the drive has stopped prior to removal:
To Insert the Drive Carrier Module
1
Release the carrier handle by sliding the latch backwards.
2
Insert the carrier into the enclosure.
3
Slide the drive carrier, gently, all the way into the enclosure.
4
Cam the drive carrier home. The camming foot on the base of the carrier will engage into a slot in
the enclosure.
5
When the carrier is fully home, close the handle. You should hear a click as the latch engages and
holds the handle closed.
6
Close the enclosure.
DataDirect Networks StorageScaler 6000 User Guide Rev B
29
4.7Replacing the DEM
Important
Warning
The DEM card should only be replaced by trained personnel. The handle rib will light up BLUE for
service.
Observe all conventional ESD precautions when handling Storage Scaler 6000 modules and
components. Avoid contact with backplane components and module connectors, etc.
Instructions are also clearly labeled on the inside cover of the enclosures (Figure 4–3).
Figure 4–3
DEM Removal Label
To Replace the DEM
30
1
Grip the top latch, rotate it until you reach the limit of rotation, and then pull up to remove the DEM.
2
Insert the replacement DEM.
3
Press on the latch to rotate it down to lock it into place.
DataDirect Networks StorageScaler 6000 User Guide Rev B
Drive Addressing
A
Drive Enclosure Addressing
A.1
Background
This sections explains the drive enclosure addressing of the disk enclosures for the StorageScaler 6000 Drive
Enclosure. There are three drive numbering options:
• 1 x 60 (one set of drives 1 through 60); (Figure A–1, use Figure A–4, and Figure A–5 for cabling).
• 2 x 30 (two sets of drives 1 through 30); (Figure A–2, use Figure A–6 for cabling).
• 4 x 15 (four sets of drives 1 through 15); (Figure A–3, use Figure A–7 for cabling).
Figure A–1
1 x 60 Drive Layout Configuration
Figure A–2
2 x 30 Drive Layout Configuration
DataDirect Networks StorageScaler 6000 User Guide Rev B
31
Drive Addressing Mapping
Figure A–3
32
4 x 15 Drive Layout Configuration
DataDirect Networks StorageScaler 6000 User Guide Rev B
Drive Addressing
Figure A–4
StorageScaler 6000 - 1x60 Configuration
DataDirect Networks StorageScaler 6000 User Guide Rev B
33
Drive Addressing Mapping
Figure A–5
34
StorageScaler 6000 - Daisy Chain Configuration for 2 Rack 20 Drawer
DataDirect Networks StorageScaler 6000 User Guide Rev B
Drive Addressing
Figure A–6
StorageScaler 6000 - 2x30 Configuration
DataDirect Networks StorageScaler 6000 User Guide Rev B
35
Drive Addressing Mapping
Figure A–7
36
StorageScaler 6000 - 4 x 15 Configuration
DataDirect Networks StorageScaler 6000 User Guide Rev B
Appendix B. Rack-Mounting the StorageScaler 6000
The Storage Scaler 6000 is designed to fit within a 4U rack space. Follow these steps to mount the system in
your rack:
1. Using eight (8) 32 × 0.188" Phillips panhead screws for each slider, attach the four (4) inner sliders to the chassis
as shown in Figure B- 1 below.
Figure B-1. Attach 4 Inner Sliders to Chassis
2. Loosen the nine (9) screws on the rail kit and set the length to fit the depth of your rack Figure B-2. Tighten all the
screws once the rail kit is set to the desired length. Repeat for the other rail kit.
3. Attach the two (2) rail kits to your rack as shown in Figure B-2. Make sure you leave enough space for the unit—
bottom of screw plate aligns to bottom of Storage Scaler 6000 chassis.
At the front, use one (1) screw plate, one (1) shelf locking bracket (installed from behind), and six (6) #10 screws.
For the rear end, use one (1) screw plate and four (4) #10 screws.
4. If the depth of your rack is more than 25.5 inches (647 mm), attach the two (2) Cable Management Arm (CMA)
brackets to the rear end of the rail kits Figure B-2.
Figure B-2. Attach Rail Kits to Rack
Attach Screw Plate
with (6) #10 Screws
Bottom of Screw Plate Aligns
to Bottom of Chassis
Shelf Locking Bracket
installed from Behind
Attach (2) CMA Brackets
Attach Screw Plate
with (4) #10 Screws
Loosen (9) Screws to
Adjust Rail Kit Length
Front of Rack
5. Using two (2) 10-32 ×0.50" (100d) Phillips flathead screws for each CMA, attach the CMA to the CMA brackets
Figure B-3. If the depth of your rack is 25.5 inches (647 mm) or less, attach the CMA directly to the rack, above the rail
kits. For square-hole rack, add 100d #10 shoulder washers.
6. With the help of a partner, hold the chassis close to the rail kits. Align the rear flanges on chassis with the rail kit
flanges Figure B-3 and slide the chassis into rack until the sliders are engaged (slide in about 12 inches until stopped).
Then slide the chassis out until locked. Depress the slider locks and proceed to slide the chassis all the way in.
7. Using two (2) 8-32 ×0.25" Phillips panhead screws, secure the two CMA to rear of chassis.
Figure B-3. Install Chassis to Rack
Attach CMA to Chassis with
(2) 8-32x0.25" Phillips
Panhead Screws
Rail Kit Flange
(Rear Flange of Chassis
must set on Rail Kit Flange)
Attach CMA with
(2) 10-32x0.50" (100d)
Phillips Flathead Screws
(Add 100d #10 Shoulder Washers
for Square-Hole Rack)
Rear Flange on Chassis