IBM DS4000 EXP810 Operating instructions

IBM System Storage DS4000 EXP810
Storage Expansion Enclosure 
Installation, User’s and Maintenance Guide
GC26-7798-09

IBM System Storage DS4000 EXP810
Storage Expansion Enclosure 
Installation, User’s and Maintenance Guide
GC26-7798-09

Note:
Before using this information and the product it supports, be sure to read the general information in the “Safety” on page xi
and “Notices” on page 177 sections.
Ninth Edition (April 2009)
This edition replaces GC26-7798-08 and all previous editions of GC26-7798. This edition also applies to all
subsequent releases and modifications until otherwise indicated in new editions.
©Copyright International Business Machines Corporation 2006, 2009.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Figures ...........................vii
Tables ............................ix
Safety ............................xi
About this document .....................xvii
Who should read this document
How this document is organized
Getting information, help, and service
..................
Be
DS4000 and DS5000 Storage Subsystem installation tasks - General overview xviii
fore you call........................xxii
Using the documentation ....................xxii
Finding Storage Manager software, controller firmware, and README files xxii
IBM System Storage Productivity Center ..............xxiii
Essential Web sites for DS4000/DS5000 support information
xvii
..................xvii
................xxii
......xxiii
Software service and support ..................xxiv
Hardware service and support ..................xxv
Fire suppression systems ...................xxv
How to send your comments ..................xxv
Chapter 1. Introduction ......................1
Overview ...........................1
Operating system support ....................2
Fibre channel defined ......................2
SATA defined .........................2
Inventory checklist ........................3
EXP810 components .......................3
Enhanced Disk Drive Modules (E-DDMs)...............4
Environmental Service Modules (ESMs) ...............5
Connectors, switch, and enclosure ID ...............5
Rear drive channel ports ....................7
The ac power supply and fan units .................8
The dc power supply and fan units ................10
Small Form-Factor Pluggable (SFP) modules ............12
Telco bezel .........................13
Software and hardware compatibility and upgrades ...........14
Software and firmware support code upgrades ............14
EXP810 hardware and software compatibility .............15
Determining firmware levels ...................16
Receiving product updates and support notifications ..........17
Best practices guidelines ....................17
Specifications .........................18
Area requirements ......................19
Dimensions ........................19
Weight ..........................19
Shipping dimensions .....................19
Environmental requirements and specifications ............20
Temperature and humidity ...................20
Altitude ..........................20
Airflow and heat dissipation ..................21
Shock and vibration requirements ................21
Acoustic noise .......................22
© Copyright IBM Corp. 2006, 2009 iii

Electrical requirements .....................22
Power and site wiring requirements for models with ac power supply and
Power and site wiring requirements for models with dc power supply and
fan units ........................23
fan units ........................23
Network Equipment-Building System (NEBS) information for applicable Disk
Heat output, airflow, and cooling .................24
Systems .........................25
Chapter 2. Installing the EXP810..................29
Installation overview .......................29
Handling static-sensitive devices ..................30
Preparing for installation .....................30
Tools and hardware required ...................31
Preparing the site .......................31
Preparing the rack ......................32
Installing the support rails .....................32
Installing the EXP810 into a rack ..................36
Installing a Telco bezel ......................38
Chapter 3. Cabling the EXP810 ..................41
Enclosure ID settings ......................41
Fibre channel loop and ID settings..................42
Cabling the EXP810 .......................42
Installing SFP modules ......................43
Removing SFP modules .....................45
Handling fibre-optic cables ....................46
Using LC-LC fibre-channel cables ..................47
Connecting an LC-LC cable to an SFP module ............48
Removing an LC-LC fibre-channel cable ..............49
Cabling rules and recommendations .................50
Cabling the EXP810 to a storage subsystem ..............51
EXP810 loop redundancy .....................53
Example of a correct redundant drive loop ..............54
Intermixing the EXP810, EXP710, and EXP100 in the same drive loop ....56
Intermixing EXP810s with EXP710s and EXP810s in a DS4700 or DS4800
configuration .........................60
Cabling the ac power supply ....................61
Cabling the dc power supply ....................62
Single-level redundant dc cabling .................63
Dual-level redundant dc cabling..................64
Chapter 4. Operating the EXP810 .................67
Performing the DS4000 Health Check process .............67
Web pages .........................68
Hardware responsibilities ....................68
Powering on the EXP810 .....................69
Turning on the EXP810 ....................69
Firmware updates ........................71
Finding controller, storage expansion enclosure, and drive information ....72
Troubleshooting the storage expansion enclosure ............72
Checking the LEDs .......................73
The ac power supply and fan unit LEDs...............73
The dc power supply and fan unit LEDs...............74
Front LEDs .........................75
Rear LEDs .........................76
iv IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide

Seven-segment numeric display .................77
Powering off the storage expansion enclosure .............79
Turning off the EXP810 .....................80
Performing an emergency shutdown ................82
Restoring power after an unexpected shutdown ............83
Recovering from an overheated power supply and fan unit .........84
Chapter 5. Installing and replacing components ...........87
Service Action Allowed Status LED .................87
Adding the EXP810 to an existing and configured redundant drive channel/loop
pair ............................87
Removing and replacing a bezel ..................90
Replacing a filter and filter retainer .................91
Working with hot-swap E-DDMs ..................92
Installing hot-swap hard disk drives ................94
Replacing hot-swap hard disk drives ................95
Replacing multiple E-DDMs ...................96
Replacing all E-DDMs at the same time..............98
Replacing the drives one at a time ...............100
Verifying the Link Rate setting ..................101
Replacing an ac power supply and fan unit ..............104
Replacing a dc power supply and fan unit ..............109
Replacing an Environmental Service Module (ESM) ...........115
Replacing an SFP module ....................118
Replacing a midplane ......................120
Chapter 6. Hardware maintenance ................125
General checkout .......................125
Solving problems .......................125
Parts listing..........................131
Appendix A. Upgrading the DS4000 controller firmware ........135
Upgrading the firmware .....................137
Downloading the firmware to controller B ...............138
Powering up the DS4000 with EXP810 drive enclosures attached......140
Adding and synchronizing the firmware for controller A with the firmware for
controller B .........................141
Completing the firmware upgrade procedure .............142
Upgrading controller firmware for an existing DS4000 EXP710 configuration to
support EXP810 .......................143
Appendix B. Records .....................147
Identification numbers ......................147
Storage subsystem and controller information record ..........148
Sample information record ...................149
Installed device records .....................150
Appendix C. Rack mounting template ...............151
Appendix D. Power cords ....................155
Appendix E. Additional System Storage DS documentation ......159
DS Storage Manager Version 10 library ...............159
DS5100 and DS5300 Storage Subsystem library ............
159
DS4800 Storage Subsystem library .................160
DS4700 Storage Subsystem library .................162
Contents v

DS4500 Storage Subsystem library .................163
DS4400 Storage Subsystem library .................164
DS4300 Storage Subsystem library .................165
DS4200 Express Storage Subsystem library .............166
DS4100 Storage Subsystem library .................167
DS5000 Storage Expansion Enclosure documents ...........168
DS4000 Storage Expansion Enclosure documents ...........168
Other DS and DS-related documents ................170
Appendix F. Accessibility ....................171
Appendix G. Product Recycling and Disposal ............173
Appendix H. Battery Return Program ...............175
Notices ...........................177
Trademarks..........................177
Important notes ........................178
Product recycling and disposal ..................178
Battery return program .....................179
Contact information for IBM Taiwan Product Service...........180
Electronic emission notices ....................180
Federal Communications Commission (FCC) statement ........180
Chinese class A compliance statement...............180
Industry Canada Class A emission compliance statement ........181
Australia and New Zealand Class A statement ............181
United Kingdom telecommunications safety requirement ........181
European Union EMC Directive conformance statement ........181
Taiwan Class A warning statement ................182
Japanese Voluntary Control Council for Interference (VCCI) statement 182
Glossary ..........................183
Index ............................193
vi IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide

Figures
1. EXP810 hot-swap drive bays ...........................4
2. Back view; power switch, enclosure ID, and connectors .................6
3. Back view; power switch, enclosure ID, and connectors .................7
4. Rear view of drive channel ports .........................8
5. Power supply and fan unit components .......................9
6. Power supply and fan unit and airflow .......................10
7. The dc power supply and fan unit components ....................11
8. The dc power supply and fan unit and airflow ....................12
9. SFP module and fibre optic cable.........................13
10. Bezel ...................................13
11. Filter and filter retainer.............................14
12. EXP810 dimensions .............................19
13. EXP810 airflow ...............................21
14. Example of cold aisle/hot aisle rack configuration ...................25
15. Front rack mounting template ..........................33
16. Rear rack mounting template ..........................34
17. Installing the support rails ...........................36
18. Installing the EXP810 .............................37
19. Securing the storage expansion enclosure to the rack .................38
20. Installing a bezel ...............................39
21. Storage expansion enclosure seven-segment enclosure ID ...............42
22. SFP module and protective cap .........................44
23. Installing an SFP module into the host port .....................45
24. Unlocking the SFP module latch - plastic variety ...................45
25. Unlocking the SFP module latch - wire variety ....................46
26. Recommended bending and looping specifications for fibre-optic cables ..........47
27. LC-LC fibre-channel cable ...........................47
28. Removing fibre-optic cable protective caps .....................48
29. Inserting an LC-LC fibre-channel cable into an SFP module ...............49
30. LC-LC fibre-channel cable lever and latches .....................49
31. Removing the LC-LC fibre-channel cable ......................50
32. Installing an SFP module and LC-LC cable in a supported DS4000 storage subsystem .....53
33. Installing an SFP module and connecting an LC-LC cable to the EXP810 ..........53
34. Correct EXP810 redundant drive loop configuration ..................55
35. Intermixing EXP810 and EXP710 in different drive loops ................59
36. Intermixing EXP810 and EXP710 by model type behind each controller drive port .......59
37. Acceptable EXP710, EXP810 and EXP100 intermix configuration in a DS4700 or DS4800
environment ................................61
38. Cabling variations when intermixing EXP100, EXP710, and EXP810 storage expansion
enclosures behind a DS4800 Storage Subsystem ...................61
39. The dc power supply and fan unit cabling scheme - single-level redundancy .........64
40. The dc power supply and fan unit cabling scheme - dual-level redundancy .........65
41. The dc power supply connector - PIN positions....................65
42. The dc wiring from EXP810 to disconnect device and dc power source ...........66
43. The ac power supply and fan unit LEDs ......................74
44. The dc power supply and fan unit LEDs ......................74
45. Front LEDs.................................76
46. Rear LEDs, controls, and connectors .......................77
47. Numeric display LEDs.............................78
48. Cabling the EXP810 to an existing and configured drive loop ..............89
49. Removing and replacing a bezel .........................91
50. Hot-swap E-DDM LEDs ............................94
51. E-DDM CRU handle .............................95
© Copyright IBM Corp. 2006, 2009 vii

52. Link rate LEDs ...............................103
53. Link rate switch ...............................104
54. Replacing a power supply and fan unit ......................108
55. Replacing a dc power supply and fan unit .....................114
56. Removing and replacing an Environmental Service Module (ESM) ............117
57. Replacing an SFP module ...........................119
58. Front cage frame screw locations ........................121
59. Screws holding the top and bottom sides of the chassis to the cage frame .........122
60. EXP810 storage expansion enclosure parts list ...................132
61. Only one entry appears in the Directly-Managed Storage Subsystem tree .........142
62. Dual entries appear in the Directly-Managed Storage Subsystem tree ...........143
63. Front rack mounting template ..........................152
64. Rear rack mounting template ..........................153
viii IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide

Tables
1. Where to find DS4000 or DS5000 installation and configuration procedures.........xviii
2. Description of Figure 2 on page 6 .........................7
3. Description of Figure 3 on page 7 .........................7
4. Description of Figure 4 on page 8 .........................8
5. Description of Figure 5 on page 9 .........................9
6. Description of Figure 7 on page 11 ........................11
7. Filter and filter retainer description ........................14
8. Software and firmware levels for the EXP810 ....................14
9. EXP810 hardware and software compatibility ....................16
10. EXP810 weights ...............................19
11. EXP810 component weights ..........................19
12. EXP810 shipping carton dimensions........................20
13. Temperature and humidity requirements for storage expansion enclosure when in storage or in
transit ...................................20
14. Temperature and humidity requirements for storage expansion enclosure in a typical Information
Technology (IT) or office environment .......................20
15. EXP810 altitude ranges ............................21
16. EXP810 power and heat dissipation........................21
17. Random vibration power spectral density ......................22
18. EXP810 sound levels .............................22
19. EXP810 ac power requirements .........................22
20. EXP810 dc power requirements .........................23
21. Temperature and humidity requirements for storage expansion enclosure in a Telco/NEBS-3
compliant environment .............................26
22. Altitude requirements .............................26
23. Altitude objectives ..............................26
24. Minimum firmware levels required to support the EXP810 ................30
25. Firmware levels for intermixing storage servers and expansion enclosures..........56
26. Supported EXP810, EXP710, and EXP100 enclosure combinations per redundant drive
channel/loop pair in a DS4800 Storage Subsystem environment .............57
27. Possible combinations of 14-drive and 16-drive storage expansion enclosures per drive loop for
DS4300 dual controller Turbo models only .....................57
28. Supported EXP810 and EXP710 enclosure combinations per redundant drive channel/loop pair in
a DS4700 Express configuration .........................58
29. The dc power supply connector - PIN descriptions ..................65
30. The dc power source wiring descriptions ......................66
31. The ac power supply and fan unit LEDs ......................74
32. The dc power supply and fan unit LEDs ......................75
33. Front LEDs and controls ............................76
34. Rear LEDs, controls, and connectors .......................77
35. Numeric display diagnostic codes.........................79
36. Drive LED activity ..............................93
37. Data transfer rates for drive modules .......................102
38. Symptom-to-FRU index ............................126
39. Parts listing (EXP810 storage expansion enclosure) .................132
40. Firmware versions..............................136
41. Storage subsystem and controller information record .................148
42. Sample information record...........................149
43. Hard disk drive record ............................150
44. IBM power cords ..............................155
45. DS Storage Manager Version 10 titles by user tasks .................159
46. DS5100 and DS5300 Storage Subsystem document titles by user tasks ..........160
47. DS4800 Storage Subsystem document titles by user tasks ...............160
© Copyright IBM Corp. 2006, 2009 ix

48. DS4700 Storage Subsystem document titles by user tasks ...............162
49. DS4500 Storage Subsystem document titles by user tasks ...............163
50. DS4400 Storage Subsystem document titles by user tasks ...............164
51. DS4300 Storage Subsystem document titles by user tasks ...............165
52. DS4200 Express Storage Subsystem document titles by user tasks ...........166
53. DS4100 Storage Subsystem document titles by user tasks ...............167
54. DS5000 Storage Expansion Enclosure document titles by user tasks ...........168
55. DS4000 Storage Expansion Enclosure document titles by user tasks ...........168
56. DS4000 and DS4000–related document titles by user tasks ..............170
57. DS4000 Storage Manager alternate keyboard operations ...............171
xIBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide

Safety
The caution and danger statements that this document contains can be referenced
in the multilingual IBM®Safety Information document that is provided with your IBM
System Storage™ EXP810 storage expansion enclosure. Each caution and danger
statement is numbered for easy reference to the corresponding statements in the
translated document.
v Danger: These statements indicate situations that can be potentially lethal or
extremely hazardous to you. A danger statement is placed just before the
description of a potentially lethal or extremely hazardous procedure, step, or
situation.
v Caution: These statements indicate situations that can be potentially hazardous
to you. A caution statement is placed just before the description of a potentially
hazardous procedure step or situation.
v Attention: These notices indicate possible damage to programs, devices, or
data. An attention notice is placed just before the instruction or situation in which
damage could occur.
Before installing this product, read the following danger and caution notices.
Statement 1:
© Copyright IBM Corp. 2006, 2009 xi

DANGER
Electrical current from power, telephone, and communication cables is
hazardous.
To avoid ashock hazard:
v Do not connect or disconnect any cables or perform installation,
maintenance, or reconfiguration of this product during an electrical
storm.
v Connect all power cords to aproperly wired and grounded electrical
outlet.
v Connect to properly wired outlets any equipment that will be attached to
this product.
v When possible, use one hand only to connect or disconnect signal
cables.
v Never turn on any equipment when there is evidence of fire, water, or
structural damage.
v Disconnect the attached power cords, telecommunications systems,
networks, and modems before you open the device covers, unless
instructed otherwise in the installation and configuration procedures.
v Connect and disconnect cables as described in the following table when
installing, moving, or opening covers on this product or attached
devices.
To Connect: To Disconnect:
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to outlet.
5. Turn device ON.
1. Turn everything OFF.
2. First, remove power cords from outlet.
3. Remove signal cables from connectors.
4. Remove all cables from devices.
Statement 2:
CAUTION:
When replacing the lithium battery, use only an equivalent type battery
recommended by the manufacturer. If your system has amodule containing a
lithium battery, replace it only with the same module type made by the same
manufacturer. The battery contains lithium and can explode if not properly
used, handled, or disposed of.
Do not:
vThrow or immerse into water
vHeat to more than 100° C(212° F)
vRepair or disassemble
Dispose of the battery as required by local ordinances or regulations.
Statement 3:
xii IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide

CAUTION:
When laser products (such as CD-ROMs, DVD drives, fibre optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
v Use of controls or adjustments or performance of procedures other than
those specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
Class 1Laser statement
Class 1 Laser Product
Laser Klasse 1
Laser Klass 1
Luokan 1 Laserlaite
Apparell À Laser de Calsse 1
IEC 825-11993 CENELEC EN 60 825
Statement 4:
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Safety xiii

Statement 8:
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
2
1
CAUTION:
Never remove the cover on apower supply or any part that has the following
label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect aproblem with one of these parts, contact
aservice technician.
Statement 29:
xiv IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide

CAUTION:
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment. If this
connection is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system
earthing electrode conductor or to abonding jumper from an earthing
terminal bar or bus to which the dc supply system earthing electrode
conductor is connected.
v This equipment shall be located in the same immediate area (such as,
adjacent cabinets) as any other equipment that has aconnection between
the earthed conductor of the same dc supply circuit and the earthing
conductor, and also the point of earthing of the dc system. The dc system
shall not be earthed elsewhere.
v The dc supply source shall be located within the same premises as this
equipment.
v Switching or disconnecting devices shall not be in the earthed circuit
conductor between the dc source and the point of connection of the
earthing electrode conductor.
Statement 30:
CAUTION:
To reduce the risk of electric shock or energy hazards:
v This equipment must be installed by trained service personnel in a
restricted-access location, as defined by the NEC and IEC 60950-1, First
Edition, The Standard for Safety of Information Technology Equipment.
v Connect the equipment to areliably grounded safety extra low voltage
(SELV) source. An SELV source is asecondary circuit that is designed so
that normal and single fault conditions do not cause the voltages to exceed
asafe level (60 Vdirect current).
v The branch circuit overcurrent protection must be rated 20 A.
v Use 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not
exceeding 4.5 meters in length.
v Incorporate areadily available approved and rated disconnect device in the
field wiring.
CAUTION:
This unit has more than one power source. To remove all power from the unit,
all dc MAINS must be disconnected.
Safety xv

Cable Warning:
WARNING: Handling the cord on this product or cords associated with accessories
sold with this product, will expose you to lead, a chemical known to the State of
California to cause cancer, and birth defects or other reproductive harm. Wash
hands after handling.
xvi IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide

About this document
This document provides instructions for installing and customizing the configuration
of your IBM® System Storage DS4000 EXP810 storage expansion enclosure. It also
provides maintenance procedures and troubleshooting information.
Who should read this document
This document is intended for system operators and service technicians who have
extensive knowledge of fibre channel and network technology.
How this document is organized
Chapter 1, “Introduction,” on page 1 describes the IBM System Storage EXP810
storage expansion enclosure. This chapter includes an inventory checklist and an
overview of the storage expansion enclosure features, operating specifications, and
components.
Chapter 2, “Installing the EXP810,” on page 29 contains information on how to
install the EXP810.
Chapter 3, “Cabling the EXP810,” on page 41 contains information on how to cable
the EXP810.
Chapter 4, “Operating the EXP810,” on page 67 contains information on how to
power on and off the storage expansion enclosure, recover from an overheated
power supply and fan unit, troubleshoot the storage expansion enclosure, and
interpret LEDs.
Chapter 5, “Installing and replacing components,” on page 87 contains step-by-step
instructions about how to install or remove customer replaceable units (CRUs), such
as hard disk drives, power supply and fan units, dc power supply and fan units,
bezel, filter and filter retainer, environmental services modules (ESMs), midplane,
and SFP modules.
Chapter 6, “Hardware maintenance,” on page 125 describes problems and
symptoms that are specific to your storage expansion enclosure. It also provides a
parts list for the EXP810.
Appendix A, “Upgrading the DS4000 controller firmware,” on page 135 contains
instructions for how to upgrade the existing EXP810 ESM firmware.
Appendix B, “Records,” on page 147 provides a table that you can use to record
and update important information about your EXP810, including serial number and
device records. Whenever you add options to your EXP810, be sure to update the
information in this table.
Appendix C, “Rack mounting template,” on page 151 provides the rack mounting
templates for installation of the EXP810. If you want to tear out the templates from
the document for use during installation, use these copies of the templates.
Appendix D, “Power cords,” on page 155 lists power cord information for the
EXP810.
© Copyright IBM Corp. 2006, 2009 xvii

Appendix E, “Additional System Storage DS documentation,” on page 159 lists
additional DS4000™ documents.
Appendix F, “Accessibility,” on page 171 details accessibility information.
Appendix G, “Product Recycling and Disposal,” on page 173 details the European
directive about product recycling.
DS4000
verview
and DS5000 Storage Subsystem installation tasks - General
o
Table 1 provides a sequential list of many installation and configuration tasks that
are common to most DS4000 and DS5000 configurations. When you install and
configure your DS4000 or DS5000 storage subsystem, refer to this table to find the
documentation that explains how to complete each task.
See also: The DS4000 or DS5000 Quick Start Guides for your storage subsystem
configuration provides an excellent overview of the installation process.
Table 1. Where to find DS4000 or DS5000 installation and configuration procedures
Installation task Where to find information or procedures
1Plan the installation vIBM System Storage DS Storage Manager Installation and
Host Support Guide
vIBM System Storage DS Storage Manager Command-line
Programming Guide
vIBM System Storage Quick Start Guide for the following
storage subsystems:
– DS5100/DS5300
– DS4800
– DS4200/DS4700
vIBM System Storage DSxxxx Installation, User’s, and
Maintenance Guide for the following storage subsystems:
– DS5100/DS5300
– DS4800
– DS4700
– DS4500
– DS4400
– DS4300
– DS4200
– DS4100
xviii IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide