IBM Sys tem Storage DS3950 Storag e Subsyste m
Installation, User’s, and Maintenance Guide
GA32-0953-03
IBM Sys tem Storage DS3950 Storag e Subsyste m
Installation, User’s, and Maintenance Guide
GA32-0953-03
Note:
Before using this information and the product it supports, be sure to read the general information in “Safety” on page xi
and “Notices” on page 201.
This edition applies to the IBM System Storage DS3950 Storage Subsystem with controller firmware version 7.60,
and to all subsequent releases and modifications until otherwise indicated in new editions.
This edition replaces GA32-0953-02.
© Copyright IBM Corporation 2009, 2012.
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 .......xvii
How this document is organized.......xvii
DS3950, DS4000, and DS5000-family storage
subsystem installation tasks - General overview . xviii
Getting information, help, and service .....xxii
Before you call ............xxii
Using the documentation ........xxiii
Finding DS3950, DS4000, and DS5000-family
readme files ............xxiii
Web sites .............xxiii
Software service and support .......xxiv
Hardware service and support ......xxv
Fire suppression systems ........xxv
Taiwan Contact Information .......xxv
Chapter 1. Introduction ........1
Overview ...............1
Base DS3950 features ..........2
Operating system support .........2
FC-SAS defined ............3
Fibre Channel defined ..........3
iSCSI defined .............3
SAS defined .............3
SATA defined .............3
T10 PI defined.............3
Inventory checklist ............4
Product updates and support notifications ....5
Best practices guidelines ..........5
Storage subsystem components ........6
Enhanced Disk Drive Modules (E-DDMs)....7
Controllers ..............8
Connectors, switch, and enclosure ID ....9
Setting up IP addresses for DS3950 storage
controllers .............11
AC power supply and fan units ......13
Battery units .............14
SFP modules .............16
Software and hardware compatibility and upgrades 17
Software and firmware support code upgrades 18
Determining firmware levels .......18
Specifications ..............19
Area requirements ...........19
Dimensions ............19
Weight ..............20
Shipping dimensions .........20
Environmental requirements and specifications 21
Temperature and humidity .......21
Altitude .............22
Airflow and heat dissipation ......22
Shock and vibration requirements .....23
Acoustic noise ...........23
Electrical requirements .........23
Power and site wiring requirements ....24
Heat output, airflow, and cooling ......24
Chapter 2. Installing the storage
subsystem .............27
Installation overview ...........27
Handling static-sensitive devices .......29
Preparing for installation ..........29
Tools and hardware required .......31
Preparing the site ...........31
Preparing the rack cabinet ........32
Installing the support rails .........33
Installing the DS3950 ...........36
Removing the CRUs ..........36
Removing a controller .........37
Removing an ac power supply and fan unit 38
Removing an E-DDM .........39
Installing the DS3950 into a rack on the support
rails ................40
Replacing the components ........42
Replacing a controller .........42
Replacing an ac power supply and fan unit . 43
Replacing an E-DDM .........44
Chapter 3. Cabling the storage
subsystem .............45
Enclosure ID settings ...........45
Fibre Channel loop and ID settings ......46
Working with SFPs and fiber-optic cables ....46
Handling fiber-optic cables ........47
Installing SFP modules .........48
Removing SFP modules .........50
Using LC-LC Fibre Channel cables .....51
Connecting an LC-LC cable to an SFP module 52
Removing an LC-LC Fibre Channel cable . . 54
Connecting storage expansion enclosures to the
DS3950 ................55
Redundant drive channel pair .......55
Overview of steps to connect storage expansion
enclosures to a storage subsystem ......56
DS3950 storage subsystem drive cabling
topologies ..............57
One DS3950 and one storage expansion
enclosure .............59
One DS3950 and two storage expansion
enclosures .............60
One DS3950 and three storage expansion
enclosures .............62
One DS3950 and four storage expansion
enclosures .............63
© Copyright IBM Corp. 2009, 2012 iii
One DS3950 and up to six storage expansion
enclosures .............64
One DS3950 and two or more storage
expansion enclosures in a mixed configuration 66
DS3950 storage subsystem and supported storage
expansion enclosure drive cabling schemes . . . 67
DS3950 storage subsystem drive cabling rules 67
One DS3950 and one EXP395 storage
expansion enclosure .........70
One DS3950 and two EXP395 storage
expansion enclosures .........71
One DS3950 and three or more EXP395
storage expansion enclosures ......72
Storage expansion enclosure settings .....78
Fibre Channel loop and ID settings ....78
Storage expansion enclosure ID settings . . . 78
Connecting secondary interface cables .....78
Configuring the storage subsystem ......79
Storage subsystem management methods . . . 80
Host-agent (in-band) management method . . 80
Direct (out-of-band) management method . . 81
Connecting hosts to the DS3950 using Fibre
Channel host ports ...........82
Fibre Channel and iSCSI connections .....84
Fibre Channel host loop configurations ....85
Redundant Fibre Channel host loops ....85
iSCSI configurations ..........88
DS3950 host iSCSI configurations .....88
Installing the storage subsystem configuration. . . 92
Cabling the ac power supply ........92
Chapter 5. Replacing components . . 121
Handling static-sensitive devices .......121
Service Action Allowed Status LED ......121
Replacing a controller ..........122
Installing hard disk drives .........127
Working with hot-swap E-DDMs .......128
Installing hot-swap E-DDMs .......130
Replacing hot-swap E-DDMs .......132
Replacing multiple E-DDMs .......133
Replacing all E-DDMs at the same time . . 134
Replacing the E-DDMs one at a time . . . 136
Verifying the link rate setting ........138
Replacing an ac power supply and fan unit . . . 141
Replacing a battery unit ..........146
Replacing an SFP module .........148
Replacing a midplane ..........151
Chapter 6. Hardware maintenance . . 155
General checkout ............155
Solving problems ............155
Parts listing ..............164
Determining basic information of drive FRUs . . 165
Appendix A. Records ........167
Identification numbers ..........167
Storage subsystem and controller information
record ................168
Sample information record ........169
Installed device records ..........170
Chapter 4. Operating the storage
subsystem .............93
Performing the DS3950 Health Check process . . . 93
Web pages..............94
Hardware responsibilities.........94
Powering on the storage subsystem ......95
Turning on the storage subsystem ......95
Installing the DS Storage Manager client.....97
Monitoring status through software ......98
Finding controller, storage expansion enclosure,
and drive information ..........99
Firmware updates ...........100
Troubleshooting the storage subsystem . . . 101
Checking the LEDs ...........102
AC power supply and fan unit LEDs ....102
Front LEDs .............103
Battery unit LEDs ...........104
Controller LEDs ...........105
Seven-segment numeric display LEDs ....107
Powering off the storage subsystem ......109
Turning off the storage subsystem .....109
Performing an emergency shutdown ....112
Restoring power after an unexpected shutdown 112
Recovering from an overheated power supply and
fan unit ...............114
Cache memory and cache battery.......116
Cache memory ............116
Subsystem cache battery.........117
Appendix B. Rack mounting templates 171
Appendix C. Specifications for
non-IBM rack installation ......175
General safety requirements for IBM products
installed in a non-IBM rack or cabinet .....175
Rack specifications ...........177
Appendix D. Power cords ......183
Appendix E. Additional DS3950
documentation ...........187
DS Storage Manager Version 10 library .....187
DS3950 storage subsystem library ......188
DS4800 storage subsystem library ......189
DS4700 storage subsystem library ......190
DS4500 storage subsystem library ......191
DS4400 storage subsystem library ......192
DS4300 storage subsystem library ......193
DS4200 Express storage subsystem library....194
DS4100 Storage subsystem library ......195
DS3950, DS4000, and DS5000 storage expansion
enclosure documents ...........196
DS5000 and DS4000-related documents .....197
Appendix F. Accessibility ......199
Notices ..............201
iv
IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Trademarks ..............202
Important notes ............203
Particulate contamination .........203
Documentation format ..........204
Electronic emission notices .........204
Federal Communications Commission (FCC)
Class A Statement ...........204
Industry Canada Class A Emission Compliance
Statement .............205
Avis de conformité à la réglementation
d'Industrie Canada ..........205
Australia and New Zealand Class A Statement 205
European Union EMC Directive Conformance
Statement .............205
Germany Electromagnetic Compatibility
Directive ..............205
Japan Voluntary Control Council for Interference
(VCCI) Class A Statement ........207
Japan Electronics and Information Technology
Industries Association (JEITA) Statement . . . 207
Korea Communications Commission (KCC)
Class A Statement ...........207
Russia Electromagnetic Interference (EMI) Class
A Statement .............207
People's Republic of China Class A Electronic
Emission Statement ..........208
Taiwan Class A Electronic Emission Statement 208
Taiwan Contact Information .......208
Glossary .............209
Index ...............219
Contents v
vi IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Figures
1. DS3950 hot-swap drive bays .......7
2. Back view of Model 94H; controllers with four
total Fibre Channel host channels .....10
3. Back view of Model 98H; controllers with two
Fibre Channel host channels and two iSCSI
host channels ............11
4. Power supply and fan unit components for the
DS3950 ..............14
5. Power supply and fan unit and airflow 14
6. Backup battery unit ..........15
7. SFP module and fiber-optic cable .....17
8. DS3950 dimensions ..........20
9. DS3950 airflow ...........22
10. Example of cold aisle/hot aisle rack
configuration ............25
11. Example of DS3950 serial number, machine
type, and model number location .....28
12. Front rack mounting template ......33
13. Rear rack mounting template ......34
14. Installing the support rails .......35
15. Removing and replacing a controller ....38
16. Removing a power supply and fan unit 39
17. Removing an E-DDM CRU .......39
18. Installing the DS3950 .........41
19. Securing the DS3950 to the rack cabinet 41
20. Removing and replacing a controller ....42
21. Replacing a power supply and fan unit 43
22. Replacing an E-DDM .........44
23. Storage subsystem seven-segment enclosure
IDs...............46
24. Bending and looping specifications for
fiber-optic cables ...........48
25. SFP module and protective cap ......50
26. Installing an SFP module into the host port 50
27. Unlocking the SFP module latch - plastic
variety ..............51
28. Unlocking the SFP module latch - wire variety 51
29. LC-LC Fibre Channel cable .......52
30. Removing fiber-optic cable protective caps 53
31. Inserting an LC-LC Fibre Channel cable into
an SFP module ...........53
32. LC-LC Fibre Channel cable lever and latches 54
33. Removing the LC-LC Fibre Channel cable 54
34. Example of a redundant drive channel pair 56
35. DS3950 storage subsystem ports and
controllers .............58
36. Cabling for one DS3950 and one storage
expansion enclosure..........59
37. Cabling for one DS3950 and two storage
expansion enclosures .........60
38. Incorrect cabling of one DS3950 and two
storage expansion enclosures.......61
39. Cabling for one DS3950 and three storage
expansion enclosures .........62
40. Cabling for one DS3950 and four storage
expansion enclosures .........63
41. Cabling for one DS3950 and up to six storage
expansion enclosures .........64
42. Cabling for one DS3950 and up to six storage
expansion enclosures .........66
43. Cabling for one DS3950 and two or more
storage expansion enclosures in a mixed
environment ............67
44. DS3950 drive ports connected to EXP810 ESM
ports labeled 1B ...........69
45. Cabling for one DS3950 and one EXP395
storage expansion enclosure .......70
46. One DS3950 and two EXP395 storage
expansion enclosures behind a pair of DS3950
drive ports .............71
47. One DS3950 and three EXP395 storage
expansion enclosures behind a pair of DS3950
drive ports .............72
48. One DS3950 and four EXP395 storage
expansion enclosures behind a pair of DS3950
drive ports .............74
49. One DS3950 and a maximum of six EXP395
storage expansion enclosures behind a pair of
DS3950 drive ports ..........76
50. Ethernet and serial port locations on DS3950 79
51. Host-agent (in-band) managed storage
subsystems.............81
52. Direct (out-of-band) managed storage
subsystems.............82
53. Location of host cables on RAID controllers on
the DS3950 .............83
54. Cabling diagram for two redundant host
connections ............84
55. Examples of redundant host direct attached
Fibre Channel SAN configurations .....86
56. Example of a single SAN fabric configuration 86
57. Example of a dual SAN fabric configuration 87
58. Example of two storage subsystems in a dual
SAN environment ..........87
59. Example of a two-cluster configuration 88
60. Example of a single-host, multiple-port
configuration ............89
61. Example of a multiple-host, multiple-port
configuration ............89
62. Example of iSCSI and Fibre Channel hosts,
multiple-port configuration .......90
63. Example of an incorrect configuration:
Single-host, iSCSI and Fibre Channel ....91
64. Example of a multiple-host, multiple-port,
multiple-switch configuration ......92
65. Power supply and fan unit LEDs .....102
66. Front LEDs and controls ........103
67. Battery unit LEDs ..........104
68. Model 94H: LEDs, controls, and connectors of
controllers with two standard Fibre Channel
host expansion channels ........105
© Copyright IBM Corp. 2009, 2012 vii
69. Model 98H: LEDs, controls, and connectors of
controllers with two standard Fibre Channel
host expansion channels and two optional
iSCSI host expansion channels ......106
70. Numeric display LEDs ........108
71. Cache Active LEDs..........117
72. Battery unit LEDs ..........119
73. Unlocking the SFP module latch - plastic
variety ..............124
74. Unlocking the SFP module latch - wire
variety ..............124
75. Removing a controller from the DS3950 125
76. Installing a controller .........126
77. Inserting a hard disk drive into a drive slot 127
78. Inserting a hard disk drive into the connector 128
79. Hot-swap E-DDM LEDs ........131
80. E-DDM CRU handle .........131
81. Link rate LEDs ...........140
82. Link rate switch...........140
83. Replacing a power supply and fan unit 145
84. Removing and replacing a battery unit from
the controller chassis .........147
85. Replacing an SFP module .......150
86. Front cage frame screw locations .....152
87. Screws holding the top and bottom sides of
the chassis to the cage frame ......153
88. DS3950 storage subsystem parts list ....164
89. An IBM hologram label example .....166
90. Front rack mounting template ......172
91. Rear rack mounting template ......173
92. Top View of non-IBM Rack Specifications
Dimensions ............178
93. Rack specifications dimensions, top front
view ..............179
94. Rack specifications dimensions, bottom front
view ..............179
viii IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Tables
1. Where to find DS3950, DS4000, and
DS5000-family installation and configuration
procedures ............xviii
2. Default IP addresses and subnet masks . . . 9
3. DS3950 weights ...........20
4. DS3950 component weights .......20
5. DS3950 shipping carton dimensions ....20
6. Temperature and humidity requirements for
storage subsystem when in storage or in
transit ..............21
7. Temperature and humidity requirements for
storage subsystem in a typical Information
Technology (IT) or office environment....21
8. Temperature and humidity requirements for
storage subsystem in a NEBS/ETSI compliant
environment ............21
9. DS3950 altitude ranges .........22
10. DS3950 power and heat dissipation ....23
11. Random vibration power spectral density 23
12. DS3950 sound levels .........23
13. DS3950 ac power requirements ......24
14. Power supply and fan unit LEDs .....102
15. Front LEDs and controls ........103
16. Battery unit LEDs ..........104
17. Rear controller LEDs, controls, and
connectors ............106
18. Host and drive channel LED definitions 107
19. Numeric display diagnostic codes.....108
20. Drive LED activity ..........129
21. Data transfer rates for drive modules 139
22. Symptom-to-FRU index ........156
23. Parts listing (DS3950 storage subsystem) 164
24. Storage subsystem and controller information
record ..............168
25. Sample information record .......169
26. Hard disk drive record ........170
27. IBM power cords ..........183
28. DS Storage Manager Version 10 titles by user
tasks ..............187
29. DS3950 storage subsystem document titles by
user tasks .............188
30. DS4800 storage subsystem document titles by
user tasks .............189
31. DS4700 storage subsystem document titles by
user tasks .............190
32. DS4500 storage subsystem document titles by
user tasks .............191
33. DS4400 storage subsystem document titles by
user tasks .............192
34. DS4300 storage subsystem document titles by
user tasks .............193
35. DS4200 Express storage subsystem document
titles by user tasks ..........194
36. DS4100 storage subsystem document titles by
user tasks .............195
37. DS3950, DS4000, and DS5000 storage
expansion enclosure document titles by user
tasks ..............196
38. DS5000 and DS4000-related document titles
by user tasks............197
39. DS Storage Manager alternate keyboard
operations ............199
40. Limits for particulates and gases .....204
© Copyright IBM Corp. 2009, 2012 ix
x IBM System Storage DS3950 Storage Subsystem: 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
®
DS3950 Storage Subsystem. 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.
© Copyright IBM Corp. 2009, 2012 xi
Statement 1:
DANGER
Electrical current from power, telephone, and communication cables is
hazardous.
To avoid a shock 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 a properly 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.
xii IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Statement 2:
CAUTION:
When replacing the lithium battery, use only an equivalent type battery
recommended by the manufacturer. If your system has a module 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:
v Throw or immerse into water
v Heat to more than 100° C (212° F)
v Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber-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.
a
Class 1 Laser statement
Safety xiii
Class 1 Laser Product
Laser Klasse 1
Laser Klass 1
Luokan 1 Laserlaite
Apparell Laser de Calsse 1À
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.
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
xiv IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Statement 8:
CAUTION:
Never remove the cover on a power 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 a problem with one of these parts, contact a service
technician.
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 a reliably grounded safety extra low voltage (SELV)
source. An SELV source is a secondary circuit that is designed so that normal
and single fault conditions do not cause the voltages to exceed a safe level (60
V direct 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 a readily 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 DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
About this document
This document provides instructions for installing and customizing the
configuration of your IBM System Storage DS3950 storage subsystem. 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 DS3950
storage subsystem. This chapter includes an inventory checklist and an overview
of the storage subsystem features, operating specifications, and components.
Chapter 2, “Installing the storage subsystem,” on page 27 contains information
about how to install the DS3950 storage subsystem in a standard rack cabinet and
setting the interface options.
Chapter 3, “Cabling the storage subsystem,” on page 45 contains Fibre Channel
and power cabling information for the DS3950 storage subsystem.
Chapter 4, “Operating the storage subsystem,” on page 93 contains information
about how to turn the power to the DS3950 storage subsystem on and off, recover
from an overheated power supply and fan unit, troubleshoot, and interpret LEDs.
Chapter 5, “Replacing components,” on page 121 contains step-by-step instructions
about how to install or remove customer replaceable units (CRUs), such as
Enhanced Disk Drive Modules (E-DDMs), power supply and fan units, RAID
controllers, battery units, midplane, and Small Form-factor Pluggable transceiver
(SFP) modules.
Chapter 6, “Hardware maintenance,” on page 155 describes problems and
symptoms that are specific to the DS3950 storage subsystem. It also provides a
parts list for the DS3950 storage subsystem.
Appendix A, “Records,” on page 167 provides a table that you can use to record
and update important information about your DS3950 storage subsystem,
including serial number and device records.
Appendix B, “Rack mounting templates,” on page 171 provides the rack mounting
templates for installation of the DS3950 storage subsystem. 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 183 lists power cord information for the
DS3950 storage subsystem.
Appendix E, “Additional DS3950 documentation,” on page 187 lists additional
DS3950 documents.
© Copyright IBM Corp. 2009, 2012 xvii
Appendix F, “Accessibility,” on page 199 details accessibility information.
DS3950, DS4000, and DS5000-family storage subsystem installation
tasks - General overview
For educational information about the DS3950 and other IBM System Storage
products, go to http://ibmdsseriestraining.com/.
Table 1 provides a sequential list of many installation and configuration tasks that
are common to most DS3950, DS4000, and DS5000-family configurations. When
you install and configure your storage subsystem, refer to this table to find the
documentation that explains how to complete each task.
Table 1. Where to find DS3950, DS4000, and DS5000-family installation and configuration
procedures
Installation task Where to find information or procedures
1 Plan the installation
1|
1|
1|
v IBM System Storage DS Storage Manager Version 10 Installation
and Host Support Guide (for storage subsystems with
controller firmware version earlier than 7.8x.xx.xx)
v IBM System Storage DS Storage Manager Version 10.8
Installation and Host Support Guide (for storage subsystems
with controller firmware version 7.8x.xx.xx or later)
v DS4100 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v DS4300 Storage Subsystem Installation, User's, and Maintenance
Guide
v DS4400 Fibre Channel Storage Server Installation and Support
Guide
v DS4500 Storage Subsystem Installation, User's, and Maintenance
Guide
v DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4800
v DS4800 Storage Subsystem Installation, User’s, and Maintenance
Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4700 and DS4200, Sections 2, 3, and 4 also for installing the
EXP810 and EXP420
v IBM System Storage DS5000 Quick Start Guide
v DS5000 Installation, User's, and Maintenance Guide
v IBM System Storage DS5020 Quick Start Guide
v DS5020 Installation, User's, and Maintenance Guide
v IBM System Storage DS3950 Quick Start Guide
v DS3950 Installation, User's, and Maintenance Guide
xviii IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Table 1. Where to find DS3950, DS4000, and DS5000-family installation and configuration
procedures (continued)
Installation task Where to find information or procedures
2 Mount the DS3950
storage subsystem in
the rack
v DS4800 Storage Subsystem Installation, User’s, and Maintenance
Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4800
v DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4700 and DS4200, Sections 2, 3, and 4 also for installing the
EXP810 and EXP420
v DS4400 and DS4500 Rack Mounting Instructions
v DS4300 Rack Mounting Instructions
v DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v DS4100 Storage Subsystem Installation, User’s and Maintenance
Guide
v DS5000 Installation, User's, and Maintenance Guide
v DS3950 Installation, User's, and Maintenance Guide
v DS5020 Installation, User's, and Maintenance Guide
3 Mount the storage
expansion unit in the
rack
v DS4000 EXP100 Storage Expansion Unit Installation, User’s and
Maintenance Guide
v DS4000 EXP420 Storage Expansion Enclosures Installation,
User’s, and Maintenance Guide
v DS4000 EXP700 and EXP710 Storage Expansion Enclosures
Installation, User’s, and Maintenance Guide
v DS4000 EXP810 Storage Expansion Enclosures Installation,
User’s, and Maintenance Guide
v EXP500 Installation and User’s Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4700 and DS4200, Sections 2, 3, and 4 also for installing the
EXP810 and EXP420
v DS5000 Installation, User's, and Maintenance Guide
v DS3950 Installation, User's, and Maintenance Guide
v DS3950 EXP395 Expansion Enclosure Installation, User's, and
Maintenance Guide
About this document xix
Table 1. Where to find DS3950, DS4000, and DS5000-family installation and configuration
procedures (continued)
Installation task Where to find information or procedures
4 Route the storage
expansion unit Fibre
Channel cables
5 Route the host server
Fibre Channel cables
6 Power on the
subsystem
7 Configure network
settings
1|
1|
1|
v DS4100 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v DS4300 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4400 Fibre Channel Cabling Instructions
v DS4500 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4700 and DS4200, Sections 2, 3, and 4 also for installing the
EXP810 and EXP420
v DS4800 Storage Subsystem Installation, User’s, and Maintenance
Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4800
v DS5000 Installation, User's, and Maintenance Guide
v DS5020 Installation, User's, and Maintenance Guide
v DS3950 Installation, User's, and Maintenance Guide
v IBM System Storage DS Storage Manager Version 10 Installation
and Host Support Guide (for storage subsystems with
controller firmware version earlier than 7.8x.xx.xx)
v IBM System Storage DS Storage Manager Version 10.8
Installation and Host Support Guide (for storage subsystems
with controller firmware version 7.8x.xx.xx or later)
v DS4100 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v DS4300 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4400 Fibre Channel Storage Server Installation and Support
Guide
v DS4500 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4700 and DS4200, Sections 2, 3, and 4 also for installing the
EXP810 and EXP420
v DS4800 Storage Subsystem Installation, User’s, and Maintenance
Guide
v IBM System Storage Quick Start Guide, Quick Reference for the
DS4800
v DS5000 Installation, User's, and Maintenance Guide
v DS5020 Installation, User's, and Maintenance Guide
v DS3950 Installation, User's, and Maintenance Guide
xx IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Table 1. Where to find DS3950, DS4000, and DS5000-family installation and configuration
procedures (continued)
Installation task Where to find information or procedures
8 Zone the fabric
switch
(SAN-attached only)
1|
1|
1|
9 Install DS Storage
Manager software on
the management
1|
1|
1|
station
10 Install host software
(failover drivers) on
host server
11 Start DS Storage
Manager
12 Set the DS Storage
Manager clock
13 Set the DS Storage
Manager host default
type
14 Verify subsystem
health
v IBM System Storage DS Storage Manager Version 10 Installation
and Host Support Guide (for storage subsystems with
controller firmware version earlier than 7.8x.xx.xx)
v IBM System Storage DS Storage Manager Version 10.8
Installation and Host Support Guide (for storage subsystems
with controller firmware version 7.8x.xx.xx or later)
v DS4000 Storage Manager Copy Services Guide (describes switch
zoning for the Remote Mirror Option)
v See also the documentation provided by the switch
manufacturer.
v IBM System Storage DS Storage Manager Version 10 Installation
and Host Support Guide (for storage subsystems with
controller firmware version earlier than 7.8x.xx.xx)
v IBM System Storage DS Storage Manager Version 10.8
Installation and Host Support Guide (for storage subsystems
with controller firmware version 7.8x.xx.xx or later)
v DS Storage Manager online help (for post-installation tasks)
v DS4100 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v DS4300 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4400 Fibre Channel Storage Server Installation and Support
Guide
v DS4500 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v DS4800 Storage Subsystem Installation, User’s, and Maintenance
Guide
v DS5020 Installation, User's, and Maintenance Guide
v IBM System Storage DS3950 Installation, User's, and
Maintenance Guide
About this document xxi
Table 1. Where to find DS3950, DS4000, and DS5000-family installation and configuration
procedures (continued)
Installation task Where to find information or procedures
15 Enable DS Storage
Manager premium
feature keys
16 Configure arrays and
logical drives
17 Configure host
1|
1|
1|
partitions
18 Verify host access to
DS3950 storage
19 Add storage capacity
or configure
migration of drives
Copy Services premium features
DS4000 Storage Manager Copy Services Guide
FC/SATA Intermix premium feature
v DS4000 Fibre Channel and Serial ATA Intermix
Premium Feature Installation Overview
v FDE Best Practices Guide
Storage Partitioning (and general premium features
information)
IBM System Storage DS Storage Manager Version 10
Installation and Host Support Guide
v IBM System Storage DS Storage Manager Version 10 Installation
and Host Support Guide (for storage subsystems with
controller firmware version earlier than 7.8x.xx.xx)
v IBM System Storage DS Storage Manager Version 10.8
Installation and Host Support Guide (for storage subsystems
with controller firmware version 7.8x.xx.xx or later)
v DS Storage Manager online help
IBM System Storage Migration Guide
Getting information, help, and service
If you need help, service, or technical assistance or just want more information
about IBM products, you will find a wide variety of sources available from IBM to
assist you. This section contains information about where to go for additional
information about IBM and IBM products, what to do if you experience a problem
with your system, and whom to call for service, if it is necessary.
Before you call
Before you call, take these steps to try to solve the problem yourself:
v Check all cables to make sure that they are connected.
v Check the power switches to make sure that the system is turned on.
v Use the troubleshooting information in your system documentation, and use the
diagnostic tools that come with your system.
v Check for technical information, hints, tips, and new device drivers at the IBM
support Web site pages that are listed in this section.
v Use an IBM discussion forum on the IBM Web site to ask questions.
You can solve many problems without outside assistance by following the
troubleshooting procedures that IBM provides in the DS Storage Manager online
help or in the documents that are provided with your system and software. The
information that comes with your system also describes the diagnostic tests that
you can perform. Most subsystems, operating systems, and programs come with
information that contains troubleshooting procedures and explanations of error
messages and error codes. If you suspect a software problem, see the information
for the operating system or program.
xxii IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Using the documentation
Information about your IBM system and preinstalled software, if any, is available
in the documents that come with your system. This includes printed books, online
documents, readme files, and help files. See the troubleshooting information in
your system documentation for instructions for using the diagnostic programs. The
troubleshooting information or the diagnostic programs might tell you that you
need additional or updated device drivers or other software.
Finding DS3950, DS4000, and DS5000-family readme files
1. Go to the following Web site:
www.ibm.com/systems/support/storage/disk/
2. Click the link for your storage subsystem (for example, DS3950).
3. When the subsystem support page opens, click the Download tab.
4. Under the Download tab, click Storage Manager, firmware, HBA, tools,
support & pubs (including readmes).
5. Click the applicable tab for the type of readme file that you are looking for:
v Firmware
v Storage Mgr
v HBA
v Tools
A table displays as you click each tab.
6. In the table, click the applicable link in the Current version and readmes
column.
7. Click the link for the readme file.
Web sites
The most current information about DS3950, DS4000, and DS5000-family storage
subsystems and DS Storage Manager, including documentation and the most recent
software, firmware, and NVSRAM downloads, can be found at the following Web
sites.
DS3950, DS4000, and DS5000-family Midrange Disk Systems
IBM System Storage products
Support for IBM System Storage disk storage systems
System Storage DS3950, DS4000, and DS5000-family interoperability matrix
Find the latest information about IBM System Storage disk storage systems,
including all of the DS3950, DS4000, and DS5000-family storage subsystem:
http://www.ibm.com/systems/support/storage/disk
Find information about all IBM System Storage products:
http://www.ibm.com/systems/storage
Find links to support pages for all IBM System Storage disk storage
systems, DS3950, DS4000, and DS5000-family storage subsystems and
expansion units:
http://www.ibm.com/systems/support/storage/disk/
Find the latest information about operating system and HBA support,
clustering support, storage area network (SAN) fabric support, and DS
Storage Manager feature support:
http://www.ibm.com/systems/support/storage/config/ssic/index.jsp
About this document xxiii
Storage Area Network (SAN) support
Find information about using SAN switches, including links to user guides
and other documents:
http://www.ibm.com/systems/support/storage/san
DS3950, DS4000, and DS5000-family technical support
Find downloads, hints and tips, documentation, parts information, HBA
and Fibre Channel support:
http://www.ibm.com/systems/support/storage/disk/
Select your storage subsystem (for example, DS3950).
Premium feature activation
Activate a DS3950, DS4000, and DS5000-family premium feature by using
the online tool:
http://www-912.ibm.com/PremiumFeatures/jsp/keyInput.jsp
IBM publications center
Find IBM publications:
http://www.ibm.com/shop/publications/order/
®
Support for System p
servers
Find the latest information supporting System p AIX®and Linux servers:
http://www.ibm.com/systems/support/supportsite.wss/
brandmain?brandind=5000025
®
Support for System x
servers
Find the latest information supporting System x Intel- and AMD-based
servers:
http://www.ibm.com/systems/support/supportsite.wss/
brandmain?brandind=5000008
Fix delivery center for AIX and Linux on POWER
Find the latest AIX and Linux on POWER information and downloads:
http://www-912.ibm.com/eserver/support/fixes/fcgui.jsp
In the Product family drop-down menu, select UNIX servers. Then select
your product and fix type from the subsequent drop-down menus.
System p and AIX information center
Find everything you need to know about using AIX with System p and
POWER servers:
http://publib.boulder.ibm.com/infocenter/pseries/index.jsp?
Software service and support
Through the IBM Support Line, for a fee you can get telephone assistance with
usage, configuration, and software problems. For information about which
products are supported by Support Line in your country or region, go to the
following Web site:
http://www.ibm.com/services/sl/products
For more information about the IBM Support Line and other IBM services, go to
the following Web sites:
v http://www.ibm.com/services/
®
xxiv IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
v http://www.ibm.com/planetwide/
Hardware service and support
You can receive hardware service through IBM Integrated Technology Services or
through your IBM reseller, if your reseller is authorized by IBM to provide
warranty service. Go to the following Web site for support telephone numbers:
http://www.ibm.com/planetwide/
In the U.S. and Canada, hardware service and support is available 24 hours a day,
7 days a week. In the U.K., these services are available Monday through Friday,
from 9 a.m. to 6 p.m.
Fire suppression systems
A fire suppression system is the responsibility of the customer. The customer's own
insurance underwriter, local fire marshal, or a local building inspector, or both,
should be consulted in selecting a fire suppression system that provides the correct
level of coverage and protection. IBM designs and manufactures equipment to
internal and external standards that require certain environments for reliable
operation. Because IBM does not test any equipment for compatibility with fire
suppression systems, IBM does not make compatibility claims of any kind nor
does IBM provide recommendations on fire suppression systems.
Taiwan Contact Information
IBM Taiwan Product Service Contact Info:
IBM Taiwan Corporation
3F, No 7, Song Ren Rd., Taipei Taiwan
Tel: 0800-016-888
f2c00790
About this document xxv
xxvi IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Chapter 1. Introduction
This chapter describes the operating specifications, features, and components for
the IBM System Storage DS3950 Storage Subsystem (hereafter referred to as DS3950
or storage subsystem).
This chapter also includes an inventory checklist and important information about
best practices guidelines and product updates for your DS3950.
Overview
The IBM System Storage DS3950 storage subsystem (Machine Types 1814-94H and
1814-98H) is designed to provide solutions to meet the needs of
midrange/departmental storage requirements, delivering high performance,
advanced function, high availability, modular and scalable storage capacity, with
SAN-attached 8 Gbps Fibre Channel (FC) and 1 Gbps iSCSI connectivity, and
support for RAID levels 0, 1, 3, 5, and 6 up to over 67 terabytes (TB) when using
600 GB Fibre Channel or FC-SAS hard drives and up to 224 TB when using 2 TB
Serial Advanced Technology Attachment (SATA) Enhanced Disk Drive Modules
(E-DDMs).
A 3U rack-mountable enclosure houses the DS3950 redundant, dual-active RAID
controllers with either two Fibre Channel ports or two Fibre Channel and two
iSCSI ports per controller. The DS3950 can be configured for the attachment of host
servers and EXP395 and EXP810 storage expansion enclosures and up to 16 4 Gbps
Fibre Channel, FC-SAS, or SATA E-DDMs.
In this document, the term FC-SAS refers to a SAS drive with a FC-SAS interposer.
The DS3950 supports the attachment of up to six EXP395 and EXP810 storage
expansion enclosures, resulting in the capability to connect up to 112 E-DDMs and
enabling storage configurations of over 67 TB using 600 GB Fibre Channel
E-DDMs, or 224 TB using 2 TB SATA E-DDMs.
The base DS3950 storage subsystem supports up to 32 drives, which includes 16
drives in the DS3950 chassis and 16 more drives in an attached storage expansion
enclosure. To attach more than 32 drives, you much purchase the applicable feature
option.
To attach additional drives to the DS3950, you can use EXP395 or EXP810 storage
expansion enclosures. You can connect EXP395 storage expansion enclosures to the
DS3950 without purchasing feature options. To attach an EXP810 storage expansion
enclosure or enclosures to the DS3950, you must purchase the Attach EXP810 to
DS3950 Activation feature option. Contact your IBM marketing representative or
IBM reseller for more information.
To connect 33 - 64 drives in one DS3950 and three EXP395 storage expansion
enclosures, you must purchase the DS3950 Drive Attach 33 - 64 feature option. If
you need to connect 65 - 112 drives in a DS3950 configuration, you must purchase
the DS3950 Drive Attach 65- 112 feature option in addition to the DS3950 Drive
Attach 33 - 64 feature option. These two feature options enable you to attach the
© Copyright IBM Corp. 2009, 2012 1
additional drives in one DS3950 and up to six EXP395 storage expansion
enclosures. Contact your IBM marketing representative or IBM reseller for more
information.
Advanced DS3950 storage management, copy service options, and optional
advanced disaster recovery functions are available for the DS3950, including
FlashCopy
The DS3950 supports up to four hosts in a redundant direct-attached Fibre Channel
configuration. When using Fibre Channel or Ethernet switches, you can
redundantly connect up to 512 hosts to the DS3950 FC and iSCSI host ports. You
can order up to 128 storage partitions for the DS3950.
DS3950 storage subsystems are equipped with ac power supply and fan units that
support both NEBS/ETSI operating environments and standard IT and office
environments.
The DS Storage Manager client is also available for the DS3950. This storage
management software is designed to help centralize storage management, help
simplify partitioning of the DS3950 storage subsystem, and strategically allocate
storage capacity to maximize storage space.
®
, VolumeCopy, and Enhanced Remote Mirroring.
Base DS3950 features
The base DS3950 storage subsystem is a 3U rack-mount enclosure. The two
available models, 94H and 98H, have the following features.
Note: Depending on the configuration options that were purchased with your
DS3950, your hardware features might differ slightly from those in this list.
v Dual RAID controllers, one of the model configurations in the following list:
– Model 94H has controllers with four 8 Gbps FC host ports (two per
controller) that have 2 GB cache memory (1 GB per controller)
– Model 98H has controllers with four 8 Gbps FC host ports (two per
controller) and four 1 GB iSCSI host ports (two ports per controller) that have
4 GB cache memory (2 GB per controller)
v Four 8 Gbps FC Small Form-factor Pluggable transceivers (SFPs)
Note: The SFPs are preinstalled in the storage subsystem.
v Dual AC power and fan units
2|
2|
v Two PDU power cords
v Rack-mounting kit
v IBM Documentation CD
v Access to educational information about the DS3950 at http://
ibmdsseriestraining.com/.
Contact your IBM sales representative or reseller for more information about the
various DS3950 and options.
Operating system support
For supported operating systems, see the latest DS Storage Manager host software
readme file and the IBM DS3950, DS4000, and DS5000 series products
interoperability matrix at the following Web site for additional host operating
system support:
2 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
http://www.ibm.com/systems/support/storage/config/ssic/index.jsp
See “Finding DS3950, DS4000, and DS5000-family readme files” on page xxiii to
learn how to access the DS3950, DS4000, and DS5000-family readme files on the
Web.
FC-SAS defined
In this document, the term FC-SAS refers to a SAS drive with a FC-SAS interposer
that translates the SAS drive interface to a FC protocol interface. Contrast with “SAS
defined”.
Fibre Channel defined
Fibre Channel technology is outlined in the SCSI-3 Fibre Channel Protocol
(SCSI-FCP) standard. Fibre Channel is a high-speed data transport technology that
is used for mass storage and networking.
Using a Fibre Channel arbitrated loop (FC-AL), more than 100 Fibre Channel
devices can be supported, compared to 15 small computer system interface (SCSI)
devices. The Fibre Channel connection speed from the storage subsystem to storage
expansion enclosures is 4 Gbps, and enables data transfer rates up to 400 Mbps
half-duplex and 800 Mbps full-duplex on optical interfaces.
iSCSI defined
The Internet Small Computer System Interface (iSCSI) is an IP-based standard for
linking data storage devices over a network and transferring data by carrying SCSI
commands over IP networks.
SAS defined
The Serial-attached SCSI (SAS) is a data-transfer technology that moves data to and
from computer storage devices such as hard drives and tape drives. SAS uses a
point-to-point serial protocol instead of the traditional parallel SCSI bus
technology. In this document, the term FC-SAS refers to a SAS drive with a
FC-SAS interposer that translates the SAS drive interface to a FC protocol interface.
See “FC-SAS defined”.
SATA defined
The Serial Advanced Technology Attachment (SATA) interface offers increased data
rate performance over Parallel Advanced Technology Attachment (ATA), while
maintaining the benefits of ATA. SATA is designed to overcome the performance
barriers that have been forecasted for current parallel technologies while
maintaining the cost-efficiency of Parallel ATA. SATA specifications allow for
thinner, more flexible cables, and lower pin counts. It also enables easier, more
flexible cable routing management and the use of smaller connectors than is
possible with the existing Parallel ATA technology.
The Serial ATA Working Group introduced the first SATA specification, Serial ATA
1.0, in 2001 (http://www.serialata.org).
T10 PI defined
The T10 Protection Information (T10 PI) is an extension of the SCSI protocol that
protects user data during transfer between a sender and a receiver. Hard disk
drives with T10 PI support are formatted with 520-byte sectors instead of the
typical 512-byte sectors. The extra 8 bytes are used to store data integrity
Chapter 1. Introduction 3
information. The T10 PI model is an industry standard, and is defined by the T10
Committee. For more details about T10 PI and SCSI, including technical
specifications, see the T10 Committee website (http://www.t10.org).
Inventory checklist
After you unpack the DS3950, verify that you have the following items.
Note: Depending on your DS3950 order, your shipping box might contain
v Hardware
– Enhanced disk drive modules (E-DDMs) or blank trays (16) (Your storage
– RAID controllers (2)
– AC power supply and fan units (2)
– Fibre Channel signal cables (2)
– iSCSI signal cables (2) (model 98H only)
– Battery units (2)
– Power cables (2 rack jumper line cords) with an IEC C13 plug on end and an
– Diagnostic wrap plug/coupler (1)
– Serial cable adapter (1)
– Rack-mounting hardware kit (1), including:
– 8 Gbps Fibre Channel SFPs (4)
additional materials not listed in the following checklist. Review the
inventory checklist included in the DS3950 shipping box for any additional
parts, and use that checklist in combination with the following information.
subsystem might come with up to 16 E-DDMs.)
IEC C14 plug on the other end for connecting the DS3950 to the rack PDU
outlets
- Rails (2) (right and left assembly)
- M5 black hex-head slotted screws (12)
- M4 screws (4)
- Washers (8)
Note: The SFPs come preinstalled in the storage subsystem.
Attention: The DS3950 does not ship with region-specific ac power cords. You
must obtain the IBM-approved power cords for your region. See Appendix D,
“Power cords,” on page 183 for the IBM-approved power cords for your region.
v Software and documentation
– Host software attachment kit
A Windows host software kit is included with your storage subsystem. If you
require a different host software kit (AIX, Linux, Netware, SUN Solaris,
HP-UX, Linux on POWER, or VMware), you must purchase the applicable
feature option. Contact your IBM marketing representative or IBM reseller for
more information.
The host software kit grants you permission to attach host servers using the
applicable operating system to the DS3950. The kit includes a DS Storage
Manager Support DVD that has the applicable IBM DS Storage Manager host
software. The DVD also includes firmware, online help, and publications in
Adobe Acrobat Portable Document Format (PDF). For a list of available IBM
DS3950, DS4000, and DS5000-family publications, see Appendix E,
“Additional DS3950 documentation,” on page 187.
4 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
If you order more than one host software kit, the additional kits might also be
shipped in the DS3950 shipping box.
– Activation kit, including a storage partition kit with two storage partitions
– IBM System Storage DS3950 Storage Subsystem Installation, User's, and
Maintenance Guide
– IBM System Storage Quick Start Guide for the DS3950
– IBM Safety Information
– IBM License Agreement
– Statement of Limited Warranty
– Box ID labels (used to label the enclosure IDs on the front of the DS3950)
Note: If you ordered additional premium features or entitlements, the premium
features activation or entitlement kits might also be shipped inside the
box.
If an item is missing or damaged, contact your IBM reseller or your IBM marketing
representative.
A rack mounting template and instructions for installing the support rails and the
storage subsystem are provided in “Installing the support rails” on page 33.
To connect your DS3950 to other devices, use the following options:
v IBM SFP module (preinstalled)
v IBM LC-LC Fibre Channel cable
Note: You must order these options separately.
Product updates and support notifications
Be sure to download the latest versions of the DS Storage Manager host software,
DS3950 storage subsystem controller firmware, storage expansion enclosure ESM
firmware, and drive firmware at the time of the initial installation and when
product updates become available.
Important: Keep your system up to date with the latest firmware and other
product updates by subscribing to receive support notifications.
For more information about support notifications or the My Support feature,
including instructions on how to register, see the following IBM Support Web page:
http://www.ibm.com/systems/support/storage/subscribe/moreinfo.html
You can also check the Stay Informed section of the IBM Disk Support Web site:
http://www.ibm.com/servers/storage/support/disk/index.html
Best practices guidelines
To achieve optimal system operation, always follow these best practices guidelines:
v Make sure that your system is in an optimal state before you shut it down.
Never turn the power off if any Needs Attention LED is lit; be sure to resolve
any error conditions before you shut down the system.
v Back up the data on your storage drives periodically.
Chapter 1. Introduction 5
v To maintain power redundancy, plug the DS3950 right and left power supply
and fan units into two independent external power circuits through ac power
distribution units inside a rack cabinet or directly into external receptacles.
Similarly, make sure that the right and left power supplies of the storage
expansion enclosures attached to the DS3950 are plugged into the same two
independent external power circuits as the DS3950. This ensures that the DS3950
and all its attached storage expansion enclosures will have power in the event
that only one power circuit is available. In addition, having all the right or all
the left power cables plug into the same power circuit enables the devices in the
configuration to power on simultaneously during an unattended restoration of
power.
Note: Do not overload the circuits that power your storage subsystem and
storage expansion enclosures. Use additional pairs of ac power
distribution units (PDUs) if necessary. See “Electrical requirements” on
page 23 for information about storage subsystem power requirements.
Contact your IBM service representative for additional information if
needed.
v Before any planned system shutdown or after any system additions, removals,
or modifications (including firmware updates, logical drive creations, storage
partitioning definitions, hardware changes, and so on), complete the following
tasks:
1. Save the storage subsystem profile
2. Save the storage subsystem configuration
3. Save the Collect All Support Data (CASD)
Make sure that you save the files in a location other than in the logical drives
that were created for the storage subsystem.
For more information about how to complete these tasks, check the DS Storage
Manager online help or the Storage Manager guide for your operating system.
v During any maintenance or attended power-up procedure, carefully follow the
power-up sequence listed in “Powering on the storage subsystem” on page 95.
Check that each component of the subsystem is powered-on in the proper order
during this entire power-up procedure so the controller will be able to optimally
access all of your storage subsystems.
v The storage subsystem supports simultaneous power-up to the system
components, but always follow the power-up sequence listed in “Powering on
the storage subsystem” on page 95 during any attended power-up procedure.
v A storage system in an optimal state recovers automatically from an unexpected
shutdown and unattended simultaneous restoration of power to system
components. After power is restored, call IBM support if any of the following
conditions occur:
– The storage subsystem logical drives and subsystems are not displayed in the
DS Storage Manager graphical user interface (GUI).
– The storage subsystem logical drives and subsystems do not come online.
– The storage subsystem logical drives and subsystems seem to be degraded.
Storage subsystem components
The storage subsystem has the following removable components. These
components, called customer replaceable units (CRUs), are accessible from the front
or back of the storage subsystem.
v Up to sixteen 4 Gbps Fibre Channel or SATA Enhanced Disk Drive Modules
(E-DDMs)
6 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
v Two RAID controllers
v Two ac power supply and fan units
v Two battery units
v SFP modules
The hot-swap features enable you to remove and replace 4 Gbps Fibre Channel or
SATA E-DDMs, power supply and fan units, and controllers without turning off
the storage subsystem. You can maintain the availability of your system while a
hot-swap device is removed, installed, or replaced.
Enhanced Disk Drive Modules (E-DDMs)
The hot-swap drive bays that are accessible from the front of your storage
subsystem are shown in Figure 1.
Figure 1. DS3950 hot-swap drive bays
The DS3950 supports both Fibre Channel (FC), FC-SAS, and SATA E-DDMs
intermixed in the storage subsystem drive chassis. The DS3950 supports up to
sixteen 4 Gbps FC, 6 Gbps SAS, or 3 Gbps SATA E-DDMs.
SATA E-DDMs have an ATA translator card that converts the Fibre Channel
protocol interface of the DS3950 drive channel or loop into the hard drive SATA
protocol interface. It also provides dual paths to the SATA drive for drive CRU
path redundancy. Each drive, ATA translator card (also referred to as interposer
card), and carrier assembly are called SATA E-DDM CRUs. The Fibre Channel
E-DDMs consist of the Fibre Channel and the carrier assembly (drive tray).
The FC-SAS E-DDMs have a FC-SAS interposer card that translates the SAS drive
interface to a 4 Gbps FC protocol interface of the DS3950 drive channel. Each SAS
drive, FC-SAS interposer card (with a 2.5" to 3.5" form factor conversion), and
carrier assembly are called FC-SAS E-DDM CRUs. There are no serviceable parts in
an E-DDM FRU. If it fails, it must be replaced in its entirety. When replacing an
E-DDM FRU, be sure to order and install the correct E-DDM FRU.
Install E-DDM CRUs in the 16 drive bays on the front of the storage subsystem
from the leftmost slot (slot 1) to the rightmost slot (slot 16). When an E-DDM is
installed, the drive and tray slot designation is set automatically. The hardware
addresses are based on the enclosure ID, which is set by the controller software,
and on the E-DDM physical location in the storage subsystem.
The DS3950 storage subsystem drive channel operates at a 4 Gbps Fibre Channel
interface speed. Make sure that the DS3950 enclosure speed switch is set correctly
for 4 Gbps Fibre Channel E-DDM CRUs. The DS3950 storage subsystem SATA
E-DDM CRUs have an ATA translator card that converts E-DDM 3 Gbps SATA
drive interface protocol to a 4 Gbps Fibre Channel interface protocol. Similarly, the
Chapter 1. Introduction 7
FC-SAS E-DDM FRUs have a FC-SAS interposer card that convert the 6 Gbps the
SAS protocol to a 4 Gbps FC interface protocol. Operate these FC-SAS and SATA
E-DDMs at 4 Gbps Fibre Channel operating speed.
Note: Even though the DS3950 hasa2or4Gbps Fibre Channel Link Rate switch
that can be used to set the drive channel speed at 2 Gbps, the link rate
speed must be set to 4 Gbps. The DS3950 supports only 4 Gbps FC speed in
the drive channel. See “Verifying the link rate setting” on page 138 for more
information.
Important: Do not change the speed of a drive loop while the storage subsystem is
powered on. Such a speed change will cause unpredictable results.
Also, the drive expansion enclosures must be power cycled for the new
speed setting to be correctly recognized.
If you need to change the speed of a drive loop, complete the following steps:
1. Prepare applications for storage system shutdown.
2. Shut down the storage system.
3. Shut down the storage expansion enclosures.
4. Change the storage expansion enclosure speed settings.
5. Power on the storage expansion enclosures.
6. Power on the storage subsystem.
7. Restore storage subsystem host application operations.
The Link Rate switch on the DS3950 storage subsystem and the storage expansion
enclosures connected to it must have the same setting.
The DS3950 drive tray is not interchangeable with the drive tray of other DS4000
storage subsystems such as DS4100 or DS4300 storage subsystems. The DS3950
E-DDM option CRUs are not interchangeable with those of the DS4200 Express
and EXP420. When replacing an E-DDM CRU, be sure to order and install the
correct E-DDM CRU. Using non-supported E-DDM options or FRUs will result in
the E-DDM being locked out by the DS3950 controller firmware and might also
damage the drive connector in the enclosure midplane.
Attention:
1. After you remove an E-DDM CRU, wait 70 seconds before replacing or
reseating the E-DDM CRU to allow it to properly spin down. Failure to do so
might cause undesired events.
2. Never hot-swap an E-DDM CRU when its associated green Activity LED is
flashing. Hot-swap an E-DDM CRU only when its associated amber Fault LED
lights is not flashing or when the E-DDM is inactive and its associated green
Activity LED lights is not flashing.
Note: If the E-DDM you want to remove is not in a failed or bypass state, always
use the Storage Manager client program either to place it in a failed state or
to place the array that is associated with the E-DDM (or E-DDMs) in an
offline state before you remove it from the enclosure.
Controllers
The DS3950 has two hot-swappable and redundant RAID controllers. The
controllers are located at the back of the storage subsystem. The left controller is
labeled controller A, and the right controller is labeled controller B. One controller
will continue to operate if the other controller fails.
8 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
The controllers contain the storage subsystem control logic, interface ports, and
LEDs. Depending on the DS3950 model you purchased, your controllers are one of
the following two types:
v Model 94H has controllers with four 8 Gbps FC host ports (two per controller)
that have 2 GB cache memory (1 GB per controller)
v Model 98H has controllers with four 8 Gbps FC host ports (two per controller)
and four 1 GB iSCSI host ports (two ports per controller) that have 4 GB cache
memory (2 GB per controller)
Each controller for the DS3950 has Fibre Channel or iSCSI drive ports for
connecting to the storage expansion enclosures and two Ethernet ports for DS3950
subsystem management. See Figure 2 on page 10 or Figure 3 on page 11.
The iSCSI ports support both IPv4 and IPv6 TCP/IP addresses, CHAP, and iSNS.
Use either Cat5E or Cat6 Ethernet cable types for iSCSI port connections. A Cat6
Ethernet cable provides optimal performance.
Although both controllers (A and B) are identical, they are seated in the DS3950
chassis in opposite orientations. If the controller cannot fully be inserted in the
controller bay, flip it 180 degrees and reinsert it. Do not force fit because it might
cause damage to the controller unit.
Connectors, switch, and enclosure ID
The controllers support fiber-optic interfaces for both the host channel and drive
channel ports. The controllers also contain two Ethernet ports for storage
subsystem management purposes and a serial port that IBM Support uses to
perform problem recovery and troubleshooting procedures.
The default IP addresses and subnet masks are shown in Table 2.
Table 2. Default IP addresses and subnet masks
Port IP address Subnet mask
Controller A management
port 1
Controller A management
port 2
Controller B management
port 1
Controller B management
port 2
Controller A iSCSI port 1 192.168.130.101 255.255.255.0
Controller A iSCSI port 2 192.168.131.101 255.255.255.0
Controller B iSCSI port 1 192.168.130.102 255.255.255.0
Controller B iSCSI port 2 192.168.131.102 255.255.255.0
192.168.128.101 255.255.255.0
192.168.129.101 255.255.255.0
192.168.128.102 255.255.255.0
192.168.129.102 255.255.255.0
See “Setting up IP addresses for DS3950 storage controllers” on page 11 for more
information.
The enclosure ID, comprised of two seven-segment numbers, is located on the back
of each controller next to the controller indicator lights. The two digits that
comprise the enclosure ID are referred to as x10 and x1 digits. The enclosure ID
provides a unique identifier for each enclosure in the storage subsystem. The
Chapter 1. Introduction 9
storage management software automatically sets the enclosure ID number. You can
only change the enclosure ID setting through the DS Storage Manager software.
There are no switches on the DS3950 chassis to manually set the enclosure ID. Both
controller enclosure ID numbers will be identical under normal operating
conditions. The default setting of the enclosure ID is a value of 85.
Storage expansion enclosures in a DS3950 storage subsystem must also have
unique enclosure IDs. In addition to having unique enclosure IDs for each storage
expansion enclosure (including the DS3950 storage subsystems with drives
installed) in the DS3950 storage subsystem configuration, make sure that the single
digit (x1) of the enclosure ID for every storage expansion enclosure in a redundant
drive channel/loop pair is unique.
If you do not set the single-digit value of the enclosure IDs to be unique among
storage expansion enclosures in a redundant drive channel/loop pair, it will be
difficult to troubleshoot the source of errors in the drive channels. For example,
with four enclosures attached to a DS3950 in a redundant drive loop pair, the
correct enclosure ID settings are x1, x2, x3, and x4 (where x can be any digits that
can be set). Examples of incorrect settings would be 11, 21, 31, 41; or 12, 22, 32 62.
These examples are incorrect because the x1 digits are the same in all enclosure IDs
(either 1 or 2).
If the enclosure IDs in your subsystem configuration are not currently set to have
unique single-digit (x1) values for the enclosures in the same redundant drive
channel/loop pair, make the changes to the enclosure IDs in the next maintenance
schedule. The EXP395 and EXP810 storage expansion enclosures do not require
you to reset the power to the configuration to activate new enclosure ID settings.
Figure 2 and Figure 3 on page 11 show the two different DS3950 models that are
available. For more information about DS3950 controller options and other
components, see the “Parts listing” on page 164.
Ethernet
Serial
ports
port
Controller A
Figure 2. Back view of Model 94H; controllers with four total Fibre Channel host channels
Dual-ported
drive channel
Enclosure ID
Fibre Channel
host channels
Fibre Channel
host channels
Enclosure ID
Dual-ported
drive channel
Ethernet
ports
Controller B
Serial
port
10 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
iSCSI
host
channels
iSCSI
host
channels
Fibre Channel
host channels
Controller
canister
Dual-ported
drive
channel
Enclosure ID
Ethernet
ports
Controller B
Serial
port
Controller A
Enclosure ID
Serial
port
Ethernet
ports
Power-fan
canister
Dual-ported
drive channel
Fibre Channel
host channels
Figure 3. Back view of Model 98H; controllers with two Fibre Channel host channels and two
iSCSI host channels
Setting up IP addresses for DS3950 storage controllers
After you install DS Storage Manager (as described in the DS Storage Manager
Installation and Support Guide for your host operating system), complete one of the
following procedures to set up IP addresses:
v “Steps for setting up the DHCP/BOOTP server and network”
v “Steps for assigning static TCP/IP addresses to the DS3950 controllers” on page
12
Steps for setting up the DHCP/BOOTP server and network: To complete this
procedure, you must have the following components:
v A DHCP or BOOTP server
v A network management station (NMS) for Simple Network Management
Protocol (SNMP) traps
v A host that is connected to a storage subsystem through a Fibre Channel I/O
path
v A management station that is connected by an Ethernet cable to the storage
subsystem controllers
Note: You can avoid DHCP/BOOTP server and network tasks either by using the
default controller IP addresses, or by assigning static IP addresses to the
controller, as described in the next section.
Complete the following steps to set up the DHCP/BOOTP server and network:
1. Get the MAC address from each controller blade.
2. Complete whichever of the following steps is applicable for your server:
v On a DHCP server, create a DHCP record for each of the MAC addresses. Set
the lease duration to the longest time possible.
v On a BOOTP server, edit the bootptab file to add in the entries that associate
the MAC address tab with the TCP/IP address.
3. Connect the DS3950 storage subsystem Ethernet ports to the network.
4. Turn on the DS3950 storage subsystem.
Chapter 1. Introduction 11
The DHCP server automatically assigns new IP addresses to the controller Ethernet
port.
Steps for assigning static TCP/IP addresses to the DS3950 controllers: To
complete this procedure, you must have the following components:
v A host that is connected to a storage subsystem through a Fibre Channel I/O
path
v A management station that is connected by an Ethernet cable to the storage
subsystem controllers
For a host that is connected to a storage subsystem through a Fibre Channel I/O path:
Complete the following steps to assign static TCP/IP addresses to the DS3950
storage subsystem controllers by way of the host that has Fibre Channel
connectivity to the DS3950 Fibre Channel host port.
Note: You cannot perform in-band management with a host that has iSCSI
connections to the DS3950 until it is configured. Use an out-of-band
management connection instead.
1. Install the DS Storage Manager client software in the host, and make sure that
the SMagent software is installed and running.
2. Start the DS Storage Manager client software. The Enterprise Management
window opens.
3. Add the DS3950 subsystem to the Enterprise Management domain using the IP
address of the host that has Fibre Channel connectivity to the DS3950.
4. In the Enterprise Management window, click the name of the default storage
subsystem. The Subsystem Management window opens.
5. In the Subsystem Management window, right-click the Controller icon and
select Change > Network Configuration in the drop-down menu. The Change
Network Configuration window opens.
6. In the Change Network Configuration window, click the Controller A and
Controller B tabs and type the new TCP/IP addresses in their applicable fields.
Click OK.
7. Close the Subsystem Management window, wait at least five minutes, then
delete the default DS3950 storage subsystem entry in the Enterprise
Management window.
8. If applicable, change the IP address of the Ethernet port in the management
station to a value that is on the same TCP/IP subnet as the controller Ethernet
port IP addresses that you just assigned. Exit DS Storage Manager, then restart.
9. Make Ethernet cabling to the controller management ports. Add a new storage
subsystem entry in the Enterprise Management window, using the new
assigned IP addresses.
For a management station that is connected by an Ethernet cable to the storage subsystem
controllers: Complete the following steps to assign static TCP/IP addresses to the
DS3950 storage subsystem controllers, using default TCP/IP addresses that are
assigned to the DS3950 storage subsystem controllers during manufacturing:
1. Make a direct management connection to the DS3950 storage subsystem, using
the default TCP/IP addresses:
v Controller A: 192.168.128.101
v Controller B: 192.168.128.102
v Subnet Mask: 255.255.255.0
12 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Note: For a storage subsystem that has two Ethernet ports per controller, such
as the DS3950, use the Ethernet port that is labeled #1.
The default IP addresses of the second Ethernet port are:
v Controller A: 192.168.129.101
v Controller B: 192.168.129.102
v Subnet mask: 255.255.255.0
2. Start the DS Storage Manager client software. The Enterprise Management
window opens.
3. Add the DS3950 subsystem to the Enterprise Management domain using the
default IP addresses.
4. In the Enterprise Management window, click the name of the default storage
subsystem. The Subsystem Management window opens.
5. In the Subsystem Management window, right-click the controller icon and
select Change > Network Configuration in the pull-down menu. The Change
Network Configuration window opens.
6. In the Change Network Configuration window, click the Controller A and
Controller B tabs and type the new TCP/IP addresses in their applicable fields.
Click OK.
7. Close the Subsystem Management window, wait at least five minutes, then
delete the default DS3950 storage subsystem entry in the Enterprise
Management window.
8. If applicable, change the IP address of the Ethernet port in the management
station to a value that is on the same TCP/IP subnet as the controller Ethernet
port IP addresses that you just assigned. Exit DS Storage Manager, then restart.
9. Add a new storage subsystem entry in the Enterprise Management window,
using the new assigned IP addresses.
Note: To manage storage subsystems through a firewall, configure the firewall to
open port 2463 to TCP data.
AC power supply and fan units
The DS3950 storage subsystem has two removable ac power supply and fan units.
Each power supply and fan unit contains one power supply and two fans. The
four fans pull air through the drive from front to back across the drives.
The fans provide redundant cooling, which means that if one of the fans in either
fan housing fails, the remaining fans continue to provide sufficient cooling to
operate the storage subsystem. The power supplies provide power to the internal
components by converting incoming ac voltage to dc voltage. If one power supply
is turned off or malfunctions, the other power supply maintains electrical power to
the storage subsystem. To preserve the optimal airflow, do not remove a failed
power supply and fan unit CRU from the DS3950 chassis until you are ready to
replace it with a new CRU.
Figure 4 on page 14 shows power supply and fan unit components for the DS3950.
Notes:
1. Your DS3950 hardware might differ slightly from the following illustration.
2. Although both power supply and fan units (left and right) are identical, they
are seated in the DS3950 chassis in opposite orientations. If the power supply
and fan unit cannot fully be inserted in the power supply and fan unit bay, flip
it 180 degree and reinsert it.
Chapter 1. Introduction 13
Power supply
and fan unit B
Power
switch
Power
connector
Power
connector
Power
switch
Power supply
and fan unit A
Figure 4. Power supply and fan unit components for the DS3950
Figure 5 shows a power supply and fan unit and the airflow through the storage
subsystem.
Latch
Lever
Figure 5. Power supply and fan unit and airflow
Battery units
Statement 2:
14 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
CAUTION:
When replacing the lithium battery, use only an equivalent type battery
recommended by the manufacturer. If your system has a module 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:
v Throw or immerse into water
v Heat to more than 100° C (212° F)
v Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.
Each controller also contains a rechargeable battery unit that is used in the event of
a power failure.
Figure 6 shows how the battery unit slides into the battery backup slot in
controller A.
Latch
Pull handle
Controller A
backup battery unit
Controller B
backup battery unit
Figure 6. Backup battery unit
The backup battery unit provides power to back up the cache memory of each
controller onto flash drives in the event of a power failure. Each battery unit
contains a sealed, rechargeable SMART lithium ion battery. The battery unit
contains enough charge to back up the cached data in each controller to a flash
drive in the event of a power failure.
When the unit is powered on the first time or whenever the battery is replaced, the
battery chargers will charge the battery to the programmed level. Then, the
Chapter 1. Introduction 15
controller will start a battery learning cycle to determine whether the battery
current capacity is sufficient. Data caching starts after the battery is charged to the
programmed level. During the battery learn cycle, cache will be active if the
battery is in good condition. If the battery fails the learn cycle, it is marked as
failed. The battery learning cycle lasts up to three hours. After the first battery
learn cycle, the controller will perform a learn cycle every 8 weeks to re-calibrate
the battery-charging level.
The battery unit is hot-swappable. You can remove the battery unit for servicing
and then reinsert it while the DS3950 continues to perform I/O operations.
However, write I/O caching is disabled when the battery is in a failed state or
removed from the controller chassis. Replace the failed battery as soon as possible
to minimize the time that the write IO caching is disabled.
Information about the condition of the battery unit is conveyed by indicator LEDs
on the front of battery unit. (“Battery unit LEDs” on page 104 identifies the
indicator LEDs on the battery unit and explains the conditions that each LED
indicates.)
SFP modules
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber-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 1 Laser statement
Class 1 Laser Product
Laser Klasse 1
Laser Klass 1
Luokan 1 Laserlaite
Apparell Laser de Calsse 1À
16 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
IEC 825-11993 CENELEC EN 60 825
The storage subsystem supports a fiber-optic interface for host and storage
expansion enclosure connections. You must install a Small Form-factor Pluggable
(SFP) module in each interface connector on the controller where a fiber-optic cable
is to be installed. Do not install an SFP in any port that will not have a fiber-optic
cable attached. Remove any SFP from any port that does not have fiber-optic
cables attached.
The DS3950 storage subsystem host ports support 2, 4, and 8 Gbps Fibre Channel
speeds. The DS3950 storage subsystem drive ports support only 4 Gbps Fibre
Channel speeds.
Attention: The maximum operating speed of the Fibre Channel port is
determined by two factors: the speed of the SFP module that is installed and the
speed of the Fibre Channel connection. For example, a 4 Gbps SFP that is plugged
into a 8 Gbps-capable port will limit the speed of that port to a maximum of 4
Gbps. Conversely, an 8 Gbps SFP that is plugged into a 4 Gbps-capable port will
limit the speed of the port to a maximum of 4 Gbps. Carefully check the SFP IBM
part number, option number, and FRU part number to identify its speed. There are
no physical features that distinguish an 8 Gbps SFP from a 4 Gbps SFP.
Figure 7 shows an example of SFP module with fiber-optic cable.
Note: The SFP module and the fiber-optic cable shown are for illustrative purposes
only. The actual SFP module and the fiber-optic cable shape might look
different from the figure shown.
Fiber-optic
cable
Figure 7. SFP module and fiber-optic cable
Software and hardware compatibility and upgrades
The latest DS3950 controller firmware and NVSRAM, the storage expansion
enclosure drive enclosure ESM firmware, and Fibre Channel and SATA drive CRUs
firmware must be installed to achieve optimal functionality, manageability, and
reliability.
Unless stated otherwise, you can find the latest DS3950 publications, firmware, and
host software at the IBM System Storage Support Web site:
SFP
Module
Chapter 1. Introduction 17
http://www.ibm.com/systems/support/storage/disk
Software and firmware support code upgrades
To enable support for the DS3950, you must make sure that your system software
and firmware are the correct versions. The DS3950 initially shipped with controller
firmware version 7.60.xx.xx. However, to support FC-SAS E-DDMs, the minimum
version of controller firmware required is version 7.77.xx.xx. To find the latest DS
Storage Manager software, storage subsystem controller firmware, ESM, and
NVSRAM firmware, check the firmware readme files. See “Finding DS3950,
DS4000, and DS5000-family readme files” on page xxiii to learn how to access the
readme files on the Web.
1|
1|
1|
1|
1|
1|
1|
1|
1|
Depending on the controller firmware version for your subsystem, refer to the
following guides for instructions that describe how to install the DS3950 controller
firmware and Storage Manager host software:
v IBM System Storage DS Storage Manager Version 10 Installation and Host Support
Guide (for storage subsystems with controller firmware version earlier than
7.8x.xx.xx)
v IBM System Storage DS Storage Manager Version 10.8 Installation and Host Support
Guide (for storage subsystems with controller firmware version 7.8x.xx.xx or
later)
Note: For the latest information about supported servers and operating systems,
refer to the interoperability matrix at this Web site:
http://www.ibm.com/systems/support/storage/config/ssic/index.jsp.
Determining firmware levels
There are two different methods to determine the DS3950 storage subsystem and
firmware versions. Each method uses the DS Storage Manager client that manages
the DS3950 storage subsystem.
Method One:
1. In the Subsystem Management window, click the Summary tab.
2. In the Monitor section, click View Storage Subsystem Profile. The Storage
Subsystem Profile window opens. Scroll through the data to locate the
following information:
Note: The Storage Subsystem Profile window shows information for the entire
subsystem. Therefore, you might have to scroll through a large amount of
information to locate the firmware version numbers.
DS3950 Storage Server
v NVSRAM version
v Appware version
v Bootware version
Drives
v Firmware version
v ATA translator card firmware version (SATA E-DDMs only)
18 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Note: The ATA translator card firmware and drive firmware are
typically packaged together as a single drive firmware upgrade
file.
v FC to SAS interposer card firmware version (FC-SAS E-DDMs only)
Note: The FC to SAS interposer card firmware and drive firmware are
typically packaged together as a single drive firmware upgrade
file.
ESM
v ESM card firmware version
Method Two:
Complete the applicable procedure to obtain the specified firmware version.
To obtain the controller firmware version:
Right-click the Controller icon in the Physical View pane of the Subsystem
Management window and select Properties. The Controller Enclosure
properties window opens and displays the properties for that controller.
You must perform this step for each individual controller.
To obtain the drive firmware (and ATA translator card firmware) version:
Right-click the Drive icon in the Physical View pane of the Subsystem
Management window and select Properties. The Drive Properties window
opens and displays the properties for that drive.
You must perform this step for each individual drive.
Specifications
Area requirements
To obtain the ESM and drive enclosure component firmware versions:
1. In the Physical View pane of the Subsystem Management window, click
the Drive Enclosure Component icon, which is the icon furthest to the
right. The Drive Enclosure Component Information window opens.
2. Click the ESM icon in the left pane. The ESM information displays in
the right pane of the Drive Enclosure Component Information window.
3. Locate the firmware version of each ESM in the drive enclosure.
This section provides site specifications for the DS3950 storage subsystem. Before
installing, you must either verify that your planned installation site meets these
requirements, or prepare the site so that it does meet these requirements.
Preparations might involve meeting area requirements, environmental
requirements, and electrical requirements for DS3950 storage subsystem
installation, service, and operation.
The floor space at the installation site must provide enough strength to support the
weight of the storage subsystem and associated equipment; sufficient space to
install, operate, and service the storage subsystem; and sufficient ventilation to
provide a free flow of air to the unit.
Dimensions
Figure 8 on page 20 shows the dimensions of the DS3950, which conforms to the
19-inch rack standard.
Chapter 1. Introduction 19
44.70 cm (17.60 in.)
12.95 cm (5.1 i n.)
48.26 cm (19.00 in.)
57.15 cm (22.5 in.)
Figure 8. DS3950 dimensions
Weight
The total weight of the storage subsystem depends on the number of components
installed. Table 3 lists the maximum, empty, and shipping weights for the storage
subsystem in different configurations. Table 4 lists the weight of each component.
Table 3. DS3950 weights
Weight
Unit
Maximum
1
DS3950 40 kg (88 lb) 16.4 kg (36.1 lb) 52.2 kg (115.0 lb)
1
Chassis with all CRUs and 16 drives.
2
Chassis without CRUs and drives but with front cage frame and midplane.
Table 4. DS3950 component weights
Unit Weight
Drive 0.75 kg (1.65 lb)
Power supply and fan unit 3.60 kg (7.95 lb)
Controller (including cache battery backup
unit)
Battery unit 0.9 kg (2 lb)
2
Empty
2.8 kg (6.1 lb)
Shipping
Shipping dimensions
Table 5 lists shipping carton dimensions. The height shown includes the height of
the pallet.
Table 5. DS3950 shipping carton dimensions
Height Width Depth
45.7 cm (18.0 in.) 62.6 cm (24.5 in.) 80.7 cm (31.75 in.)
20 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Environmental requirements and specifications
This section describes the environmental requirements and specifications for the
DS3950 storage subsystem, including temperature and humidity, altitude, airflow
and heat dissipation, shock and vibration requirements, and acoustic noise levels.
Temperature and humidity
Table 6 lists the acceptable temperature and humidity ranges for the DS3950
Storage Subsystem when in storage or in transit. Table 7 lists temperature and
humidity ranges for the storage subsystem in typical Information Technology (IT)
or office environments. Table 8 lists temperature and humidity ranges for the
storage subsystem in a NEBS/ETSI compliant environment.
Note: Substantial deviations from the suggested operating range, in either
direction, if sustained for extended periods of time, will expose the unit to
greater risk of failure from external causes.
Important: The recommended operating environment air temperature is 22° C (72°
F) or lower.
Table 6. Temperature and humidity requirements for storage subsystem when in storage or in
transit
Condition Parameter Requirement
Temperature Storage range -10° - 65° C (14° - 149° F)
Maximum rate of change 15° C (27° F) per hour
Transit range -40° C to 65° C (-40° F to 149°
F)
Maximum rate of change 20° C (36° F) per hour
Relative humidity (no
condensation)
Storage range 8% to 90%
Transit range 5% to 95%
Maximum dew point 26° C (79° F)
Maximum gradient 10% per hour
Table 7. Temperature and humidity requirements for storage subsystem in a typical
Information Technology (IT) or office environment
Condition Parameter Requirement
Temperature Operating range 10° - 35° C (50° - 95° F)
Maximum rate of change 10° C (18° F) per hour
Relative humidity (no
condensation)
Table 8. Temperature and humidity requirements for storage subsystem in a NEBS/ETSI
compliant environment
Condition Parameter Requirement
Temperature
Relative humidity
condensation)
1
1
(no
Operating range 8% to 80%
Operating range 5° - 40° C (41° - 104° F)
Short-term
Maximum rate of change 30° C (54° F) per hour
Operating range 5% to 85%
Short-term
2
2
-5° - 50° C (23° - 122° F)
5% to 90% (not to exceed
0.024 kg water/kg of dry air)
Chapter 1. Introduction 21
Table 8. Temperature and humidity requirements for storage subsystem in a NEBS/ETSI
compliant environment (continued)
Condition Parameter Requirement
Notes:
1. In a NEBS/ETSI compliant environment, conditions are measured at a location 1.5 m (59
in.) above the floor and 400 mm (15.8 in.) in front of the equipment.
2. Short-term refers to a period of not more than 96 consecutive hours and a total of not
more than 15 days in one year. (This refers to a total of 360 hours in any given year, but
no more than 15 occurrences during that one-year period.)
Altitude
Table 9 lists the acceptable altitudes for operating, storing, and shipping the
DS3950.
Table 9. DS3950 altitude ranges
Environment Altitude
Operating 30.5 m (100 ft.) below sea level to 3000 m
(9842 ft.) above sea level
Storage 30.5 m (100 ft.) below sea level to 3000 m
(9842 ft.) above sea level
Transit 30.5 m (100 ft.) below sea level to 12,000 m
(40,000 ft.) above sea level
Airflow and heat dissipation
Figure 9 shows the intended airflow for the DS3950. Allow at least 30 inches in
front of the storage subsystem and at least 24 inches behind the storage subsystem
for service clearance, proper ventilation, and heat dissipation.
Figure 9. DS3950 airflow
Table 10 on page 23 lists the KVA, watts, and Btu calculations. These values
assume the power supplies have a 73 percent efficiency and a power factor of 0.99.
These tabulated power and heat dissipation values are typical for the storage
subsystem. Maximum configuration units are typically operated at higher data
rates, have larger random access memory (RAM) capacities, or have different host
interface boards.
22 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Table 10. DS3950 power and heat dissipation
Parameter KVA Watts (ac) Btu per hour
DS3950 0.496 447 1529
Shock and vibration requirements
Operational shock and operational vibration requirements are shown in this
section.
Operational Shock: The DS3950 will be able to withstand the following shock.
Subjecting the equipment to a single shock pulse with the following characteristics
will simulate this level of shock:
v Velocity change = 20 inches per second
v Wave form = Triangular, 10g @3.75 ms
Operational Vibration (Random): While in its normal operating position, the
DS3950 will continue operating when subjected to a random vibration test using
the criteria shown in Table 11. This test uses the indicated spectral power density
for 30 minutes in each of the three axes.
Table 11. Random vibration power spectral density
Hz 5 17 45 48 62 65 150 200 500
2
/Hz 2.0x10-7-72.2x10
g
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
Acoustic noise
Table 12 lists the maximum sound levels emitted by the storage subsystem.
Table 12. DS3950 sound levels
Measurement Level
Sound power (normal operation) 6.4 bels
Sound pressure (normal operation) 68 dBA
These levels are measured in controlled acoustical environments according to ISO
7779 and are reported in accordance with ISO 9296. The declared sound power
levels indicate an upper limit, below which a large portion of machines operate.
Sound pressure levels in your location might exceed the average 1-meter values
stated because of room reflections and other nearby noise.
Electrical requirements
This section provides information regarding site power and wiring, storage
subsystem power requirements, and power cord routing instructions.
Consider the following information when preparing the installation site:
v Protective ground – Site wiring must include a protective ground connection to
the ac power source.
Note: Protective ground is also known as safety ground or chassis ground.
v Circuit overloading – Power circuits and associated circuit breakers must
provide sufficient power and overload protection. To prevent possible damage to
the unit, isolate its power source from large switching loads (such as air
conditioning motors, elevator motors, and factory loads).
Chapter 1. Introduction 23
v Power failures – If a total power failure occurs, the unit automatically performs
a power-up recovery sequence without operator intervention after power is
restored.
Table 13. DS3950 ac power requirements
Low Range High Range
Nominal Voltage 90 to 136 VAC 198 to 264 VAC
Frequency (Hertz) 50 to 60 Hz 50 to 60 Hz
Idle Current 3.53 A
Maximum Operating Current 3.71 A
Maximum Surge Current 5.04 A
a.
Typical voltage: 120 V ac, 60 Hz, assumes 72% power-supply efficiency and 0.99 power
factor
b.
Typical voltage: 240 V ac, 60 Hz, assumes 72% power-supply efficiency and 0.99 power
factor
a
a
a
2.08 A
2.04 A
2.67 A
b
b
b
Power and site wiring requirements
The storage subsystem uses wide-ranging redundant power supplies that
automatically accommodate voltages to the ac power source. The ac power
supplies operate within the ranges specified in Table 13. The ac power supplies
meet standard voltage requirements for both domestic (inside USA) and
international (outside USA) operation. They use standard industrial wiring with
line-to-neutral or line-to-line power connections.
The agency ratings for the DS3950 storage subsystem are 6 amps at 100 VAC and
2.5 amps at 240 VAC. These are the overall maximum operating currents for the
DS3950 storage subsystem with ac power supply and fan unit CRUs.
AC power recovery: After a total ac power failure, after normal power is restored,
the storage subsystem performs power-up recovery procedures automatically
without operator intervention.
Power cords and receptacles: The storage subsystem ships with two jumper cords
used to connect to the rack PDU. You must purchase the power cords that are
appropriate for use in a typical outlet in the destination country. See Appendix D,
“Power cords,” on page 183 for more information.
Heat output, airflow, and cooling
See “Airflow and heat dissipation” on page 22 for heat output, airflow, and cooling
specifications.
Note: In general, disk subsystem reliability tends to decrease as the ambient
temperature of the environment in which it is being used increases. The
ambient temperature in the immediate area of the disk enclosure unit must
be kept near 22° C (72° F), or lower, to provide better reliability.
When racks that contain many storage subsystems are to be installed together, the
following requirements must be met to for the storage subsystems to be cooled
adequately:
v Air enters at the front of the rack and leaves at the back. To prevent the air that
is leaving the rack from entering the intake of another piece of equipment, you
24 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
must position the racks in alternate rows, back-to-back and front-to-front. This
arrangement is known as “cold aisle/hot aisle” and is shown in Figure 10.
v Where racks are in rows, each rack must touch the rack that is next to it to
reduce the amount of hot air that can flow around from the back of the rack into
the intakes of the storage expansion enclosures that are in that rack. Use Suite
Attach Kits to completely seal any gaps that remain between the racks. For
details about Suite Attach Kits, contact your marketing representative.
v Where racks are in rows front-to-front or back-to-back, a gap of at least 1220 mm
(48 in.) must separate the rows across the cold aisle.
v For proper airflow in each rack, the rack filler plates must be installed in unused
positions. Also, all the gaps in the front of the racks must be sealed, including
the gaps between the storage subsystems.
back
T42 racks
front
1220 mm cold
aisle width
Air
Cold aisle
front
T42 racks
back
conditioner
Hot aisle
back
T42 racks
front
Airflow
Figure 10. Example of cold aisle/hot aisle rack configuration
Perforated tiles
or gratings
2440 mm between
center lines of hot
and cold aisle
Chapter 1. Introduction 25
26 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Chapter 2. Installing the storage subsystem
This chapter provides the information that you need to install the storage
subsystem into a rack cabinet.
Before you begin the installation, review the safety information in “Safety” on page
xi.
“Installation overview” provides an overview of the entire storage subsystem
installation process. Read this overview before you begin the installation.
Installation overview
Statement 4:
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Attention: A fully configured DS3950 weighs up to 40 kg (88 lb). At least two
other people should help you lift the DS3950 from the shipping box. If desired,
open the sides of the shipping box and remove the CRUs from the DS3950 before
you lift it from the shipping box in order to lighten the storage subsystem. See
“Removing the CRUs” on page 36.
The following steps summarize the DS3950 installation process. Each step below is
detailed in this chapter or next two chapters, Chapter 3, “Cabling the storage
subsystem,” on page 45 and Chapter 4, “Operating the storage subsystem,” on
page 93.
1. Review the preparation guidelines. See “Preparing for installation” on page
29.
2. Prepare the installation site. See “Preparing the site” on page 31.
3. Prepare the rack cabinet. See “Preparing the rack cabinet” on page 32.
4. Fold down and open the sides of the shipping box. Without removing the
DS3950 from box, you can remove the DS3950 rack mounting rails and
hardware from the box. The DS3950 rack mounting rails and hardware are
placed on the bottom of the shipping box (under the DS3950 storage
subsystem). Install the support rails in the rack cabinet. See “Installing the
support rails” on page 33.
© Copyright IBM Corp. 2009, 2012 27
5. Before removing the DS3950 from the shipping box, remove the components
from the DS3950 chassis to lighten the unit. See “Removing the CRUs” on
page 36.
6. Record the serial number, machine type and model number, and RAID
controller MAC addresses for your DS3950 storage subsystem in Appendix A,
“Records,” on page 167.
The serial number, machine type, and model number are located on the left
edge of the front unit as shown in Figure 11.
Ser i al n um b er
Machine type
Model number
Figure 11. Example of DS3950 serial number, machine type, and model number location
The MAC addresses are located near the Ethernet ports on each RAID
controller.
7. Install and secure the DS3950 chassis in the rack cabinet. See “Installing the
DS3950 into a rack on the support rails” on page 40.
8. If needed, replace the components in the installed DS3950 chassis. See
“Replacing the components” on page 42.
9. Install the storage expansion enclosure or enclosures you will cable to the
DS3950 in the rack cabinet. Follow the instructions in the Installation, User’s,
and Maintenance Guide for your storage expansion enclosure to set up and
mount the storage expansion enclosures.
10. Use SFP modules and Fibre Channel cables to cable the DS3950 to the EXP395
or EXP810 storage expansion enclosure. See “Connecting storage expansion
enclosures to the DS3950” on page 55.
11. Perform one of the following cabling tasks to enable management of the
DS3950 configuration:
v If you are using out-of-band management, cable the DS3950 Ethernet ports
to either the management workstation or the host.
v If you are using in-band management, cable the DS3950 host channels to the
Fibre Channel host bus adapters (HBAs) in either the hosts or the Fibre
Channel switch that connects to the host HBAs. See “Connecting hosts to
the DS3950 using Fibre Channel host ports” on page 82.
12. Connect the power cables for the DS3950. See “Cabling the ac power supply”
on page 92.
Attention:
Before you turn on the power to the DS3950 storage subsystem, it must be
populated with at least two E-DDMs.
If at least two E-DDMs are not installed in the DS3950, an insufficient load to
the enclosure power supplies might cause them to intermittently appear as
failed, falsely indicating the power supplies are bad. All of the E-DDMs in the
DS3950 storage subsystem and the connected storage expansion enclosure or
enclosures must contain no prior configuration data.
28 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
13. Turn on the power to the attached storage expansion enclosure and the
DS3950 storage subsystem using the procedure described in “Powering on the
storage subsystem” on page 95.
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
14. Install the DS Storage Manager host software on the management workstation
(for out-of-band management) or on the host (for in-band management).
Depending on the controller firmware version for your subsystem, refer to the
following guides for instructions that describe how to install the DS3950
controller firmware and Storage Manager host software:
v IBM System Storage DS Storage Manager Version 10 Installation and Host
Support Guide (for storage subsystems with controller firmware version
earlier than 7.8x.xx.xx)
v IBM System Storage DS Storage Manager Version 10.8 Installation and Host
Support Guide (for storage subsystems with controller firmware version
7.8x.xx.xx or later)
15. Use the DS Storage Manager host software to verify the configuration.
16. Review and perform the procedures described in “Performing the DS3950
Health Check process” on page 93.
Handling static-sensitive devices
Attention: Static electricity can damage electronic devices and your system. To
avoid damage, keep static-sensitive devices in their static-protective packages until
you are ready to install them.
To reduce the possibility of electrostatic discharge (ESD), observe the following
precautions:
v Limit your movement. Movement can cause static electricity to build up around
you.
v Handle the device carefully, holding it by its edges or its frame.
v Do not touch solder joints, pins, or exposed printed circuitry.
v Do not leave the device where others can handle and possibly damage the
device.
v While the device is still in its static-protective package, touch it to an unpainted
metal part of the system unit for at least two seconds. This drains static
electricity from the package and from your body.
v Remove the device from its package and install it directly into your system unit
without setting it down. If it is necessary to set the device down, place it in its
static-protective package. Do not place the device on your system unit cover or
on a metal table.
v Take additional care when handling devices during cold weather because
heating reduces indoor humidity and increases static electricity.
Preparing for installation
Before installing the DS3950 storage subsystem, create a detailed plan of how this
unit will be used in your storage configuration. The plan might include
determining RAID levels, failover requirements, operating systems to be used, and
total storage capacity requirements.
The following illustration shows the items that you need to install the DS3950
storage subsystem in the rack cabinet. If any items are missing or damaged,
contact your place of purchase.
Chapter 2. Installing the storage subsystem 29
Note: The illustration might differ slightly from your DS3950 hardware. The
host-interface cables, Ethernet cables, Fibre Channel signal cables, and iSCSI
signal cables are not shown in the following illustration.
Support rails
AC power supply
and fan unit
M5 x 8 mm
screws (12)
M4 x 8 mm
screws (4)
Small Form-factor
Pluggable transceivers (pre-installed)
Storage
subsystem
Backup
battery unit
Controller
Firmware and DS
Storage Manager DVDs
AC power cord (2)
Complete the following steps to prepare the DS3950 storage subsystem for
installation into a rack cabinet:
1. Prepare the site to meet all area, environmental, power, and site requirements.
For more information, see “Specifications” on page 19.
Statement 4:
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
2. Move the shipping box that contains the DS3950 to the site.
3. Remove the mounting rails, mounting hardware, and line jumper cords from
the DS3950 shipping box. Do not remove the DS3950 from the shipping box at
this time.
30 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Attention: The mounting rails, mounting hardware, and line jumper cords
might be packed beneath the DS3950 in the shipping box. To remove these
items from the shipping box without first removing the DS3950, open the two
long sides of the shipping box. Then open and fold flat the two short sides of
the shipping box. This enables you to access the mounting rails, mounting
hardware, and line jumper cords without first removing the DS3950 from the
shipping box.
After you open the DS3950 shipping container and remove the mounting rails,
mounting hardware, and line jumper cords, check the remaining contents (see
“Inventory checklist” on page 4) without removing the DS3950 from the
shipping box. If any items are missing, contact your IBM reseller or
representatives before proceeding.
4. Verify that you have the applicable host software kit for your operating system.
Your DS3950 comes with a Microsoft Windows host software attachment kit. If
you require a different host operating system (AIX, Linux, Netware, SUN
Solaris, HP-UX, Linux on POWER, or VMware), you must purchase the
applicable feature option. The host software kit grants you permission to attach
host servers using the applicable operating system to the DS3950.
The kit includes a DS Storage Manager DVD that has the applicable IBM DS
Storage Manager host software. If you order one or more additional host
software kits, the kits might also be shipped in the DS3950 shipping box.
The DVD also includes the DS3950 storage subsystem controller firmware. For
the latest controller firmware, check the IBM support Web site for IBM System
Storage products:
http://www.ibm.com/systems/support/storage/disk
5. Read the applicable readme files that are included in the Storage Manager host
software or DS3950 controller firmware packages for any updated information
about hardware, software, or firmware products. See “Finding DS3950, DS4000,
and DS5000-family readme files” on page xxiii to learn how to access the
DS3950 and readme files on the Web.
6. Continue with “Preparing the site.”
Tools and hardware required
Gather the tools and equipment you will need for installation. These might
include:
v Region-specific power cords required for the DS3950
v 5/16 (8 mm) hex nut driver
v No. 2 Phillips screwdriver
v Antistatic protection (such as a grounding wrist strap)
v Fibre Channel (FC) and Ethernet interface cables and cable straps
v Rack power jumper cords that are shipped with the DS3950
v SFP modules
v Rack-mounting hardware that ships with the DS3950
Preparing the site
This section lists the floor space requirements and weight information for the
storage subsystem. For information about interface cables and connections, see
Chapter 3, “Cabling the storage subsystem,” on page 45.
Chapter 2. Installing the storage subsystem 31
Floor space: The floor area at the installation site must provide the following
conditions:
v Sufficient space to install the storage subsystem
v Enough stability to support the weight of the fully configured storage subsystem
and associated systems. See “Weight” on page 20 for weight specifications.
Make sure that all requirements, such as floor space, air conditioning, and electrical
service, have been met. Other site preparation activities include the following tasks:
v To make sure that there is enough room to move around the cabinet and install
modules, clear space at the installation area.
v Install uninterruptible power supply (UPS) devices.
v If applicable, install host servers with Fibre Channel host bus adapters (HBAs),
Fibre Channel switches, or other devices.
v Route interface cables from the Fibre Channel HBA ports in the hosts or Fibre
Channel switches to the installation area.
v Route main power cords to the installation area.
Continue with “Preparing the rack cabinet.”
Preparing the rack cabinet
Important: Before you install the storage subsystem in a rack cabinet, keep in mind
the following considerations:
v Review the documentation that comes with your rack enclosure for safety and
cabling considerations.
v Install the storage subsystem in an environment with a temperature of 22° C (72°
F). See “Environmental requirements and specifications” on page 21 for details.
v For proper airflow, do not block the air vents; allow for at least 15 cm (6 in.) of
air space.
v For optimal rack stability, load the rack starting at the bottom.
v If you install multiple components in the rack, do not overload the power
outlets.
v Always connect the storage subsystem to a properly grounded outlet.
v Always connect the IBM-certified rack power distribution units (PDUs) to at
least two independent power circuits or sources.
Complete the following steps to prepare the rack cabinet before you install the
storage subsystem:
1. Move, unpack, and level the rack at the installation site (if needed).
2. Remove the external rack panels.
3. If necessary, stop all I/O activity to the devices in the rack.
4. If necessary, turn off all drive enclosure and rack power. Disconnect existing
power, network, and other external cables.
5. Install any additional interface cables and power cables.
After you have completed these steps, continue with “Installing the support rails”
on page 33.
32 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Installing the support rails
Important: Duplicate copies of the rack mounting templates are provided in
Appendix B, “Rack mounting templates,” on page 171. If you want to
tear out the templates from this document, use the copies in
Appendix B, “Rack mounting templates,” on page 171.
Use the following templates (Figure 12 and Figure 13 on page 34) to identify the
proper locations for inserting M5 screws when mounting the support rails and
DS3950 storage subsystem to a rack cabinet. The locations for the M5 screws are
highlighted in the templates.
Hold the applicable template up to each side of the rack cabinet at the 3U section
where you will install the DS3950. U boundaries are shown as horizontal dashed
lines in the rack mounting templates. The highlighted squares on each side of the
template mark the positions where you will thread the M5 screws that secure the
rails and the DS3950 to the front and rear of the cabinet.
Note: The mounting holes that are shown in the following templates are square.
The holes in your rack might be round, square, or threaded.
3 U
2 U
1 U
Install second
Bezel
(front left)
FRONT
Install second
Bezel
(front right)
Rack Mounting
Template
Install first Install first
Install first
Rail assembly
(front left)
Install first
Rail assembly
(front right)
3 U
2 U
1 U
0 U
Figure 12. Front rack mounting template
Install second
Install second
0 U
Chapter 2. Installing the storage subsystem 33
3U
3U
REAR
Rack Mounting
Template
2U
Rail mounting guide
1U
Rail assembly
(rear left)
0U
Figure 13. Rear rack mounting template
Rail assembly
(rear right)
®
Printed in the U.S.A
2U
1U
0U
Before installing the DS3950 in a rack cabinet, you must install the rails and
rack-mounting hardware that come with your storage subsystem. The DS3950
requires an Electronic Industries Association (EIA) 310-D Type A 19-inch rack
cabinet. The distance between EIA rails, from the front to the rear of the rack, is
60.96 cm (24 in.) minimum and 81.28 cm (32 in.) maximum. This rack conforms to
the EIA standard. Where you place the support rails in the rack depends on where
you intend to position the storage subsystem.
Complete the following steps to install the support rails.
Note: Refer to Figure 14 on page 35 while performing these steps.
34 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Support rail
adjustment screws
Left
M5
screws
Figure 14. Installing the support rails
support
rail
Right
support
rail
1. Make sure that the rack cabinet has already been installed.
2. Make sure that a stabilizer has been correctly attached to the bottom front of
the rack to prevent the rack from tipping forward while the DS3950 is being
installed.
Refer to the installation and service guide, or equivalent, for the rack as
required.
3. Locate the two support rails, eight of the twelve M5 screws, and eight
washers that are supplied with the DS3950.
Note: The M5 screws and washers might already be attached to the support
rails. If so, remove them from the support rails.
4. The rack-mounted unit is three EIA units high. Decide accordingly where you
are going to install the support rails.
Important: Duplicate copies of the rack mounting templates are provided in
Appendix B, “Rack mounting templates,” on page 171. If you want
to tear out the templates from this document, use the copies in
Appendix B, “Rack mounting templates,” on page 171. Use the
preceding templates (Figure 12 on page 33 and Figure 13 on page
34) to identify the proper locations for inserting M5 screws when
mounting the support rails and DS3950 storage subsystem to a
rack cabinet. The locations for the M5 screws are highlighted in
the templates.
Note the following considerations before you choose where to install the rails:
v If you are installing the DS3950 into an empty rack, install it into the lowest
available position so that the rack does not become unstable.
v If you are installing more than one DS3950 in the rack, start at the lowest
available position, and work upward.
v If applicable, allow for possible later installation of other units.
v If necessary, remove the rack power distribution unit before you install the
support rails.
v For procedures and more information, refer to the installation and service
guide, or equivalent, for the rack.
Chapter 2. Installing the storage subsystem 35
v The lip on the rail lines up with the bottom of the storage subsystem (the
0U boundary in Figure 13 on page 34).
5. Using a No. 2 Phillips screwdriver, loosen the two screws on the left support
rail that hold the two parts of the rail together. The support rails are marked
as left or right.
6. Hold the back of the rail against the inside of the rack-mounting flange. Make
sure that the rail mounting guide pins are in the correct holes.
7. Using the 5/16 (8 mm) hex nut driver, securely tighten the two M5 screws.
Note: Make sure that you use a washer when installing an M5 screw through
a square hole on the rack-mounting flange.
8. Extend the rail to the front of the rack until it makes contact with the front
rack-mounting flange.
9. Securely tighten the M5 screws.
Note: Be sure to install the screw labeled install first in Figure 12 on page 33.
10. Securely tighten the two screws on the left support rail that hold the two parts
of the rail together.
11. Repeat step 5 through step 10 for the right support rail.
Note: Because the mounting holes on the rack are not always the same size as
the mounting screws, the lip of each of the support rails might not line
up evenly. Make minor adjustments as needed to make sure that the lip
of the left and right support rails are lined up evenly on the racks.
Failure to do so will cause the storage subsystem to fit unevenly in the
rack.
12. Continue with “Removing the CRUs.”
Installing the DS3950
This section provides instructions on installing the DS3950. The installation process
includes:
v “Removing the CRUs”
v “Installing the DS3950 into a rack on the support rails” on page 40
v “Replacing the components” on page 42
Removing the CRUs
This section describes how to remove the CRUs to minimize the weight of the
DS3950 before you install it in the rack. However, if you have three or more people
available to lift and install the DS3950 in a rack, you might not find it necessary to
remove the CRUs before you install the DS3950. If this is the case, you can skip the
CRU removal instructions provided in this section. Instead, continue with
“Installing the DS3950 into a rack on the support rails” on page 40, and then skip
the CRU replacement instructions provided in “Replacing the components” on
page 42.
Attention: Remove CRUs from the DS3950 chassis to lessen the weight to make it
easier to transfer the DS3950 storage subsystem from the shipping box to the rack.
Use the following procedures to remove the CRUs from the DS3950 before
installation. Use these instructions after you have completed all applicable site,
rack, and preparations (as listed in “Preparing for installation” on page 29) and
installed the support rails (as listed in “Installing the support rails” on page 33).
36 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Alternately, you can use these instructions to lighten the DS3950 before removing it
from the shipping box. The shipping box opens to provide access to the storage
subsystem CRUs.
The DS3950 comes with a rack-mounting hardware kit for installing it in a rack. It
is easier to lift the DS3950 and install it in a rack cabinet if you remove all the
CRUs first. You will need an antistatic wrist strap and a cart or level surface (to
hold the CRUs). Observe the precautions listed in “Handling static-sensitive
devices” on page 29.
In the following procedure, you will remove the following CRUs from the storage
subsystem before you install it in the rack:
v Controllers
v AC power supply and fan units
v Hot-swap E-DDMs
You do not need to remove the blank trays.
Statement 4:
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Attention: The storage subsystem comes with a bezel that is attached to the front
of the unit. The bezel protects the light pipes that are located above the drive trays.
Leave the protective bezel in place until you are instructed to remove it.
Removing a controller
Complete the following steps to remove a controller:
1. Squeeze the controller latch and pull the lever open 90° (so that the lever is
horizontal) to release the controller from the latch. The controller latch is a coral
colored tab on the lever.
Note: The lever rotates upward or downward 90°, depending on whether the
controller you are removing is the right or left controller CRU.
2. Slowly pull the lever away from the chassis to remove the controller from the
bay, as shown in Figure 15 on page 38.
Chapter 2. Installing the storage subsystem 37
Lever
Figure 15. Removing and replacing a controller
3. Place the controller on a level surface.
4. Repeat step 1 through step 3 for the second controller.
Removing an ac power supply and fan unit
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:
Disconnect the power cord before removing the power supply and fan unit.
Complete the following steps to remove a power supply and fan unit:
1. Squeeze the latch and pull the lever open 90° (so that the lever is horizontal) to
release the power supply and fan unit from the latch. The latch is a coral
colored tab on the lever.
2. Slowly pull the lever away from the chassis to remove the power supply and
fan unit, as shown in Figure 16 on page 39.
Note: The lever rotates upward or downward 90°, depending on whether the
38 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
power supply and fan unit you are removing is in the left or right power
supply and fan unit bay.
Lever
Latch
Figure 16. Removing a power supply and fan unit
3. Place the power supply and fan unit on a level surface.
4. Repeat step 1 through step 3 for the second power supply and fan unit.
Removing an E-DDM
Complete the following steps to remove a hot-swap E-DDM:
Note: The E-DDM comes installed in a drive tray. Do not attempt to detach the
E-DDM from the tray.
1. Use Table 26 on page 170 to record the location and identify your E-DDMs. You
must record this information to be able to replace the E-DDMs in their original
order before they were removed.
2. Release the latch on the E-DDM CRU by pressing on the inside of the bottom
of the tray handle.
3. Lift the closed latch to its open position. (The latch is at a 90° angle to the front
of the E-DDM when open.)
4. Pull the E-DDM out of the bay, as shown in Figure 17.
Latch
Figure 17. Removing an E-DDM CRU
Chapter 2. Installing the storage subsystem 39
5. Place the E-DDM CRU horizontally on a level surface.
Attention: Do not stack E-DDM CRUs on top of one another. Protect the
E-DDM CRUs from vibrations or sudden shocks.
6. Repeat step 1 through step 4 on page 39 for additional E-DDM CRUs.
Installing the DS3950 into a rack on the support rails
Complete the following steps to install the DS3950 in the rack cabinet.
CAUTION:
Do not install modules or other equipment in the top half of a rack mount
cabinet while the bottom half is empty. Doing so can cause the cabinet to
become top-heavy and tip over. Always install hardware in the lowest available
position in the cabinet.
Statement 4:
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
1. Put the DS3950 on antistatic protection, and keep it on while you perform all of
the remaining procedures in this chapter.
2. Using a No. 2 Phillips screwdriver, remove the four M4 screws from the rails
(two screws in each rail). If you do not remove these screws, the storage
subsystem will not fit securely.
Note: If the screws are shipped in the hardware pack instead of already
installed in the rails, skip this step and go to step 3.
3. Place the storage subsystem in the rack.
Note: If you have removed the CRUs from the DS3950, you can lift the unit
into the cabinet with the help of one other person. If you have not
removed the CRUs before the installation, have at least two other people
available to help you lift the DS3950 into the rack.
a. Move the storage subsystem to the front of the rack mount cabinet.
b. With help from another person, place the back of the storage subsystem on
the support rails, and then slide the unit into the rack as shown in Figure 18
on page 41.
40 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Front of Rack
Figure 18. Installing the DS3950
4. Secure the storage subsystem. Figure 19 shows how to secure the storage
subsystem to the rack.
a. Align the front mounting holes on each side of the storage subsystem with
the mounting holes on the front of the support rails.
b. Using the M4 screws that you removed in step 2 on page 40, secure the
sides in the back of the DS3950 to the rack rails.
c. Secure the front of the DS3950 using the four M5 screws as shown in
Figure 19.
M4 screws
M5 screws
Figure 19. Securing the DS3950 to the rack cabinet
Chapter 2. Installing the storage subsystem 41
5. Continue with one of the following actions:
Guide pin
Notch
v If you did remove the DS3950 CRUs before installation (as described in
“Removing the CRUs” on page 36), continue with “Replacing the
components.”
v If you did not remove the DS3950 CRUs before installation, continue with
Chapter 3, “Cabling the storage subsystem,” on page 45.
Replacing the components
If you removed components from the DS3950 storage subsystem before you
installed it into a rack cabinet, use the following procedures to replace the
components in the DS3950 after it is installed successfully in a rack cabinet.
Replacing a controller
Complete the following steps to replace the controller that you removed before the
installation.
Attention: After you remove an controller, wait 70 seconds before reseating or
replacing the controller. Failure to do so might cause undesired events. The left
and right controllers are seated in the DS3950 chassis in opposite orientations. If
you cannot fully insert the controller into the controller bay, flip it 180° and
reinsert it.
1. Slide one controller into the empty slot in the storage subsystem. Be sure that
the lever is pulled straight out as you slide the controller in, as shown in
Figure 20.
Lever
Figure 20. Removing and replacing a controller
2. As you slide the controller into the empty slot, make sure the guide pins on the
side of the controller fit into the notches. After the guide pins fit into the
notches and the controller fits snugly into the bay, push the lever downward or
upward 90°, depending on whether the controller is inserted in the A or B
controller bay to fully latch it into place. Do not force fit. The controller is
designed to prevent it from being inserted into the chassis incorrectly.
Attention: Make sure that the levers lock into place in the storage subsystem
chassis.
42 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
3. Repeat step 1 on page 42 and step 2 on page 42 to replace the second
controller.
Replacing an ac power supply and fan unit
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:
Disconnect the power cord before replacing the power supply and fan unit.
Complete the following steps to replace the power supply and fan units that you
removed before the installation:
1. Slide one power supply and fan unit into the storage subsystem. Be sure to
replace the power supply and fan units so that the lever on each power supply
and fan unit opens toward the interior of the storage subsystem, as shown in
Figure 21. Do not force fit. The power supply and fan unit is designed to
prevent it from being inserted into the chassis incorrectly.
Attention: Be sure that the lever is pulled straight out as you slide the power
supply and fan unit into the storage subsystem, as shown in Figure 21. The left
and right power supply and fan units are seated in the DS3950 chassis in
opposite orientations. If you cannot fully insert the power supply and fan unit
into the power supply and fan unit bay, flip it 180° and reinsert it.
Lever
Figure 21. Replacing a power supply and fan unit
Latch
Chapter 2. Installing the storage subsystem 43
2. As you slide the power supply and fan unit into the empty slot, make sure the
guide pins on the side of the power supply and fan unit fit into the notches
along the sides of the power supply and fan unit bay. After the guide pins fit
into the notches and power supply and fan unit fits snugly into the slot, push
the lever upward or downward 90° depending on whether the power supply
fan is inserted in the left or right bay to fully latch it into place. Push the front
of the power supply and fan unit in gently to make sure that it is fully seated.
3. Repeat step 1 on page 43 and step 2 to replace the second power supply and
fan unit.
Replacing an E-DDM
Complete the following steps to replace the hot-swap E-DDMs that you removed
before the installation.
Attention: After you remove an E-DDM CRU, wait 70 seconds before replacing
or reseating the E-DDM CRU to allow the E-DDM to properly spin down. Failure
to do so might cause undesired events.
Note: Use Table 26 on page 170 to verify the proper replacement locations of your
E-DDMs.
1. Lift up on the handle and gently push the E-DDM CRU into the empty bay
until the hinge of the tray handle latches beneath the storage subsystem bezel,
as shown in Figure 22.
Latch
Figure 22. Replacing an E-DDM
2. Push the tray handle down until the latch clicks into place.
3. Repeat step 1 and step 2 to replace additional E-DDMs.
44 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Chapter 3. Cabling the storage subsystem
After the storage subsystem is installed in its permanent location, you must cable it
to hosts, drives, and other external devices, depending on your hardware
configuration.
This chapter addresses the following cabling and configuration topics:
v “Enclosure ID settings”
v “Fibre Channel loop and ID settings” on page 46
v “Working with SFPs and fiber-optic cables” on page 46
v “Connecting storage expansion enclosures to the DS3950” on page 55
v “Connecting hosts to the DS3950 using Fibre Channel host ports” on page 82
v “Connecting secondary interface cables” on page 78
v “Configuring the storage subsystem” on page 79
v “Installing the storage subsystem configuration” on page 92
v “Cabling the ac power supply” on page 92
Enclosure ID settings
The enclosure ID, comprised of two seven-segment numbers, is located on the back
of each controller next to the indicator lights. It provides a unique identifier for
each enclosure in the DS3950 storage subsystem configuration.
The controller automatically sets the enclosure ID number. You can change the
setting through the storage management software if necessary. Both controller
enclosure ID numbers are identical under normal operating conditions. Each
storage expansion enclosure (including the DS3950 storage subsystem) in the
DS3950 storage subsystem configuration must have a unique storage enclosure ID.
In addition, the single digits (x1) of the enclosure IDs of all storage expansion
enclosures and the DS3950 storage subsystem in the redundant drive channel/loop
pair must be unique.
Although the allowable ranges for enclosure ID settings are 0-99, do not set the
enclosure ID to 00 or any number less than 80. The DS3950 enclosure ID is usually
set to a value of 85 before it is shipped.
Figure 23 on page 46 shows the enclosure ID areas.
Note: Your DS3950 hardware might differ slightly from the following illustration.
© Copyright IBM Corp. 2009, 2012 45
Enclosure ID
Enclosure ID
Figure 23. Storage subsystem seven-segment enclosure IDs
Fibre Channel loop and ID settings
When you install a hard disk drive in the storage subsystem, the drive tray plugs
into a printed circuit board called the midplane. The midplane sets the Fibre
Channel loop ID automatically, based on the enclosure ID switch setting and the
physical location (bay) of the hard disk drive.
Working with SFPs and fiber-optic cables
Each RAID controller has up to four single-ported host channel connections
(depending on the configuration you ordered) and two dual-ported drive channel
connections. A Small Form-factor Pluggable transceiver (SFP) connects each host
channel port and drive channel port to hosts and storage expansion enclosures.
Notes:
1. IBM SFP options have been tested and approved for the IBM DS storage
products. For optimal performance and compatibility, always use IBM SFP
options when installing the IBM DS products.
2. The SFPs are preinstalled in the DS3950.
The SFP is inserted into the port, and then a fiber-optic cable is inserted into the
SFP. The other end of the fiber-optic cable connects to an external device. SFPs are
laser products.
46 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber-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.
Handling fiber-optic cables
Note: IBM Fibre Channel (FC) cable options have been tested and approved for
the IBM DS storage products. For optimal performance and compatibility,
always use IBM FC cable options when installing the IBM DS products.
Attention: To avoid damage to your fiber-optic cables, follow these guidelines:
v For devices on slide rails, leave enough slack in the cables so they do not bend
to a diameter of less than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.),
when extended or become pinched when retracted.
v Do not overtighten the cable straps or bend the cables to a diameter of less than
76 mm (3 in.), or a radius less than 38 mm (1.5 in.).
v When storing excess or unused fiber-optic cables, do not bend the cables to a
diameter of less than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.) or wrap
them around themselves. See Figure 24 on page 48.
v Make sure you have a minimum loop diameter of 76 mm (3 in.) and a minimum
bend radius of 38 mm (1.5 in.) for fiber-optic cables. Loops or bends smaller
than these minimums might cause damage to your fiber-optic cables. Use loop
diameters and bend radii that are greater than these minimums.
v Do not route the cable along a folding cable-management arm.
v Route the cable away from places where it can be damaged by other devices in
the rack cabinet.
v Do not put excess weight on the cable at the connection point. Be sure that the
cable is well supported.
v Do not use plastic cable ties in place of the provided cable straps.
v The supported maximum lengths of OM2 category Fibre Channel cable are:
Chapter 3. Cabling the storage subsystem 47
– 4 Gbps: 150 m (492 ft.) of 50/125 um fiber, 300 m (984 ft.) of 62.5/125 um
fiber
– 8 Gbps: 50 m (164 ft.) of 50/125 um fiber, 150 m (492 ft.) of 62.5/125 um fiber
1.5 inch
(38 mm)
radius
3.0 inch
(76 mm)
diamet er
Figure 24. Bending and looping specifications for fiber-optic cables
Installing SFP modules
The DS3950 requires SFP modules. SFP modules convert electrical signals to optical
signals that are required for Fibre Channel transmission to and from RAID
controllers.
Note: The SFPs are preinstalled in the DS3950.
If the SFPs are not preinstalled in your DS3950 hardware, or if you need to replace
them, use the information in this section to install the SFPs into the ports. After
you install the SFP modules, you can use fiber-optic cables to connect the DS3950
to other Fibre Channel devices.
Before installing SFP modules and fiber-optic cables, read the following
information:
v Do not mix long-wave SFPs and short-wave SFPs on a single storage subsystem.
Use only short-wave SFPs. You can use the DS Storage Manager client to view
the Storage Subsystem Profile to verify that you are not mixing long-wave and
short-wave SFPs.
Attention: Do not use long-wave SFPs or GBICs in any of the Fibre Channel
ports in the DS3950 controllers. (Long-wave SFPs and GBICs are not supported
for use in the DS3950 or any of the attached storage expansion enclosures.)
v The SFP module housing has an integral guide key that is designed to prevent
you from inserting the SFP module improperly.
v Use minimal pressure when inserting an SFP module into an SFP port. Forcing
the SFP module into a port could cause damage to the SFP module or to the
port.
48 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
v You can insert or remove the SFP module while the port is powered on.
v Do not install an SFP in any port that will not have a fiber-optic cable attached.
Remove any SFP from any port that does not have fiber-optic cables attached.
v The operational or redundant loop performance is not affected when you install
or remove an SFP module.
v You must insert the SFP module into a port before you connect the fiber-optic
cable.
v You must remove the fiber-optic cable from the SFP module before you remove
the SFP module from the port. Refer to “Removing SFP modules” on page 50 for
more information.
v The maximum operating speed of the Fibre Channel port is determined by two
factors: the speed of the SFP module that is installed and the speed of the Fibre
Channel connection. For example, a 4 Gbps SFP that is plugged into an 8
Gbps-capable port will limit the speed of that port to a maximum of 4 Gbps.
Conversely, an 8 Gbps SFP that is plugged into a 4 Gbps-capable port will limit
the speed of the port to a maximum of 4 Gbps.
Attention: Carefully check the SFP IBM part number, option number, and FRU
part number to identify its speed. There are no physical features that distinguish
a 4 Gbps SFP from an 8 Gbps SFP.
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber-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.
Attention: When you handle static-sensitive devices, take precautions to avoid
damage from static electricity. For details about handling static-sensitive devices,
see “Handling static-sensitive devices” on page 29.
To install an SFP module, complete the following steps:
1. Remove the SFP module from its static-protective package.
Chapter 3. Cabling the storage subsystem 49
2. Remove the protective cap from the SFP module, as shown in Figure 25. Save
the protective cap for future use.
Plastic tab
Protective cap
SFP module
Figure 25. SFP module and protective cap
3. Remove the protective cap from the SFP port. Save the protective cap for future
use.
4. Insert the SFP module into the host port until it clicks into place. See Figure 26.
Plastic tab
Protective cap
Figure 26. Installing an SFP module into the host port
5. Connect an LC-LC Fibre Channel cable. For information about the LC-LC cable,
see “Using LC-LC Fibre Channel cables” on page 51.
Removing SFP modules
Complete the following steps to remove the SFP module from the host port:
Attention: To avoid damage to the cable or to the SFP module, make sure that
you unplug the LC-LC Fibre Channel cable before you remove the SFP module.
1. Remove the LC-LC Fibre Channel cable from the SFP module. For more
information, see “Removing an LC-LC Fibre Channel cable” on page 54.
2. Unlock the SFP module latch:
v For SFP modules that contain plastic tabs, unlock the SFP module latch by
pulling the plastic tab outward 10°, as shown in Figure 27 on page 51.
SFP module
50 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Plastic tab
Protective cap
o
10
SFP module
Figure 27. Unlocking the SFP module latch - plastic variety
v For SFP modules that contain wire tabs, unlock the SFP module latch by
pulling the wire latch outward 90°, as shown in Figure 28.
Wire
tab
Protective
cap
o
90
SFP
module
Figure 28. Unlocking the SFP module latch - wire variety
3. With the SFP latch in the unlocked position, extract the SFP module.
v For SFP modules that contain plastic tabs, slide the SFP module out of the
port.
v For SFP modules that contain wire tabs, grasp the wire latch and pull the
SFP module out of the mini-hub port.
4. Replace the protective cap on the SFP module.
5. Place the SFP module into a static-protective package.
6. Replace the protective cap on the host port.
Using LC-LC Fibre Channel cables
The LC-LC Fibre Channel cable is a fiber-optic cable that you use to connect
DS3950 Fibre Channel ports into one of the following devices:
v An SFP module installed in a Fibre Channel switch port
v An SFP module of the host bus adapter port
v An SFP module installed in an IBM EXP395 or EXP810 storage expansion
enclosure
See Figure 29 on page 52 for an illustration of the LC-LC Fibre Channel cable.
For more information about cabling these devices, see the documentation that
comes with the LC-LC Fibre Channel cable.
Chapter 3. Cabling the storage subsystem 51
Figure 29. LC-LC Fibre Channel cable
Connecting an LC-LC cable to an SFP module
Complete the following steps to connect an LC-LC Fibre Channel cable to an SFP
module:
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber-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.
1. Read the information in “Handling fiber-optic cables” on page 47.
2. If necessary, remove the protective cap from the SFP module, as shown in
Figure 25 on page 50. Save the protective cap for future use.
3. Remove the two protective caps from one end of the LC-LC cable, as shown in
Figure 30 on page 53. Save the protective caps for future use.
52 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Fibre-optic
cable
Protective cap
Figure 30. Removing fiber-optic cable protective caps
4. Carefully insert this end of the LC-LC cable into an SFP module that is
installed in the DS3950. The cable connector is keyed so it will be inserted into
the SFP module correctly. Holding the connector, push in the cable until it
clicks into place, as shown in Figure 31.
Figure 31. Inserting an LC-LC Fibre Channel cable into an SFP module
5. Remove the two protective caps from the other end of the LC-LC cable. Save
the protective caps for future use.
6. Connect this end of the LC-LC cable to one of the following devices:
v An SFP module that is installed in a separate storage expansion enclosure
v An SFP module that is installed in a Fibre Channel switch port
v A Fibre Channel host bus adapter port
Chapter 3. Cabling the storage subsystem 53
Removing an LC-LC Fibre Channel cable
Complete the following steps to remove an LC-LC Fibre Channel cable:
Attention: To avoid damaging the LC-LC cable or SFP module, make sure that
you observe the following precautions:
v Press and hold the lever to release the latches before you remove the cable from
the SFP module.
v Make sure that the levers are in the released position when you remove the
cable.
v Do not grasp the SFP module plastic tab when you remove the cable.
1. On the end of the LC-LC cable that connects into the SFP module or host bus
adapter, press down and hold the lever to release the latches, as shown in
Figure 32.
Lever
Latches
Figure 32. LC-LC Fibre Channel cable lever and latches
2. While pressing down the cable lever, carefully pull on the connector to remove
the cable from the SFP module, as shown in Figure 33.
Figure 33. Removing the LC-LC Fibre Channel cable
3. Replace the protective caps on the cable ends.
4. Replace the protective cap on the SFP module.
54 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Connecting storage expansion enclosures to the DS3950
Attention: Before you turn on the power to the DS3950 storage subsystem, it
must be populated with at least two E-DDMs. If at least two E-DDMs are not
installed in the DS3950, an insufficient load to the enclosure power supplies might
cause them to intermittently appear as failed, falsely indicating the power supplies
are bad. All of the E-DDMs in the DS3950 storage subsystem and the connected
storage expansion enclosure or enclosures must contain no prior configuration
data.
In the initial installation of the DS3950, you can add only new storage expansion
enclosures to the DS3950 storage subsystem. This means there must be no existing
configuration information about the storage expansion enclosures that you want to
install.
The DS3950 supports the attachment of up to six EXP395 and EXP810 storage
expansion enclosures, resulting in the capability to connect up to 112 E-DDMs and
enabling storage configurations of over 67 TB using 600 GB Fibre Channel or
FC-SAS E-DDMs or 224 TB using 3 TB SATA E-DDMs.
The base DS3950 storage subsystem supports up to 32 drives, which includes 16
drives in the DS3950 chassis and 16 more drives in an attached storage expansion
enclosure. To attach more than 32 drives, you much purchase the applicable feature
option.
To attach additional drives to the DS3950, you can use EXP395 or EXP810 storage
expansion enclosures. You can connect EXP395 storage expansion enclosures to the
DS3950 without purchasing feature options. To attach an EXP810 storage expansion
enclosure or enclosures to the DS3950, you must purchase the Attach EXP810 to
DS3950 Activation feature option. Contact your IBM marketing representative or
IBM reseller for more information.
To connect 33 - 64 drives in one DS3950 and three EXP395 storage expansion
enclosures, you must purchase the DS3950 Drive Attach 33 - 64 feature option. If
you need to connect 65 - 112 drives in a DS3950 configuration, you must purchase
the DS3950 Drive Attach 65- 112 feature option in addition to the DS3950 Drive
Attach 33 - 64 feature option. These two feature options enable you to attach the
additional drives in one DS3950 and six EXP395/EXP810 storage expansion
enclosures. Contact your IBM marketing representative or IBM reseller for more
information.
If the storage expansion enclosures that you want to install currently contain
logical drives or configured hot spares, and you want them to be a part of the
DS3950 storage subsystem configuration, refer to the IBM System Storage DS4000
Hard Drive and Storage Expansion Enclosure Installation and Migration Guide.
Improper drive migration might cause loss of configuration and other storage
subsystem problems. Contact your IBM technical support representative for
additional information.
Redundant drive channel pair
Each controller on the DS3950 has drive channel ports. The storage expansion
enclosures that are connected to these ports form a drive channel (also referred to
as drive loop). The maximum number of hard drives that can be installed in one
drive channel is 112. One drive channel from each controller combines to form a
redundant drive channel pair.
Chapter 3. Cabling the storage subsystem 55
Figure 34 shows an example of a redundant drive channel pair. If any component
of the drive channel fails, the RAID controllers can still access the storage
expansion enclosures in the redundant drive channel pair.
Note: In the following drive cabling figures, the DS3950 graphics are simplified to
show only the drive ports of each controller.
Redundant
Drive Channel
pair
Drive
Channel 1, port 2
Drive
Left ESM
Left ESM
Left ESM
Storage
subsystem
Left ESM
Right ESM
Right ESM
Right ESM
Drive
Channel 2, port 1
Drive
Channel 2, port 2Channel 1, port 1
Right ESM
Figure 34. Example of a redundant drive channel pair
Overview of steps to connect storage expansion enclosures
to a storage subsystem
To connect storage expansion enclosures to the storage subsystem, perform the
following steps:
Note: The following procedures are for "cold-case" procedures (in which the
DS3950 is powered down when storage expansion enclosures are connected,
56 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Left ESM
Left ESM
Right ESM
Right ESM
as in the case of initial installation). For "hot-case" procedures (in which the
DS3950 is powered on when storage expansion enclosures are connected),
refer to the IBM System Storage DS4000 Hard Drive and Storage Expansion
Enclosure Installation and Migration Guide.
1. Follow the instructions in the Installation, User's, and Maintenance Guide for
your storage expansion enclosure to set up and mount the storage expansion
enclosures.
2. Select a cabling topology appropriate for the number of storage expansion
enclosures you will connect to the DS3950. If you are connecting external
storage expansion enclosures to the DS3950, make sure that the storage
expansion enclosures are populated with at least two drives before you turn on
the power. In addition, you must have at least two drives in the DS3950 storage
subsystem before you power it on.
“DS3950 storage subsystem drive cabling topologies” describes the schemes for
cabling different numbers of storage expansion enclosures to the DS3950 and to
each other (if you are connecting more than one storage expansion enclosure).
3. After you select the cabling topology for your configuration, follow the cabling
diagram for your chosen topology and perform the steps identified in “DS3950
storage subsystem and supported storage expansion enclosure drive cabling
schemes” on page 67.
4. If required, set unique enclosure IDs for all storage expansion enclosures that
are cabled to the DS3950. See “Storage expansion enclosure ID settings” on
page 78, and then refer to your storage expansion enclosure installation manual
for details on setting the enclosure ID.
The DS3950 storage subsystem locates the drives in the storage expansion
enclosures after you turn on the power to the configuration. Always connect power
to the storage expansion enclosures first and then connect power to the DS3950.
After you have powered on the configuration, use the DS Storage Manager client
to check the status of the new drives, correct any errors found, and configure the
new drives.
Notes:
1. EXP810 and EXP395 storage expansion enclosures can be intermixed behind a
DS3950 drive channel.
2. To cable EXP810 storage expansion enclosures with a DS3950, you must
purchase the Attach EXP810 to DS3950 Activation feature option.
DS3950 storage subsystem drive cabling topologies
This section provides preferred cabling topologies for cabling storage expansion
enclosures to the DS3950 storage subsystem. The cabling topologies include the
following:
v “One DS3950 and one storage expansion enclosure” on page 59
v “One DS3950 and two storage expansion enclosures” on page 60
v “One DS3950 and three storage expansion enclosures” on page 62
v “One DS3950 and four storage expansion enclosures” on page 63
v “One DS3950 and up to six storage expansion enclosures” on page 64
v “One DS3950 and two or more storage expansion enclosures in a mixed
configuration” on page 66
Each example provides redundant paths to the drives. If one of these examples is
suitable for your hardware and application, complete the cabling connections as
Chapter 3. Cabling the storage subsystem 57
described by the graphics. If you have hardware other than what is shown in these
examples to include in your topology, use these examples as a starting point for
creating your specific topology.
Important: The DS3950 supports the connection of a maximum of six storage
expansion enclosures per redundant drive channel pair. The DS3950
supports one redundant drive channel pair.
If you are using fiber-optic cables, install SFP modules into the ports that will
receive the cables before installing the cables.
Figure 35 and shows the locations of controllers A and B, the single-ported Fibre
Channel host channels, Ethernet ports, and dual-ported Fibre Channel drive
channels at the back of the DS3950 storage subsystem.
Note: Your DS3950 hardware might differ slightly from the following illustration.
Drive Channel 2 Port 2 on Controller B
Host
port 2
Controller B
Drive Channel 2 Port 1 on Controller B
Controller A
Drive Channel 1 Port 2 on Controller A
Drive Channel 1 Port 1 on Controller A
Host
port 2
Host
port 1
Host
port 1
Figure 35. DS3950 storage subsystem ports and controllers
Notes:
1. EXP810 and EXP395 storage expansion enclosures can be intermixed behind a
DS3950 drive channel.
2. To cable EXP810 storage expansion enclosures with a DS3950, you must
purchase the Attach EXP810 to DS3950 Activation feature option.
58 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
One DS3950 and one storage expansion enclosure
If you are cabling one DS3950 storage subsystem to one storage expansion
enclosure, Figure 36 shows the correct cabling topology.
Note: Figure 36 illustrates the drive channel connections between the DS3950 and
the storage expansion enclosures. Do not use Figure 36 as the cabling
diagram. Follow the instructions in “DS3950 storage subsystem and
supported storage expansion enclosure drive cabling schemes” on page 67
for specific cabling instructions.
Port 2, drive channel 1
Storage
subsystem
Port 1, drive channel 1
1A
1B
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
Figure 36. Cabling for one DS3950 and one storage expansion enclosure
Chapter 3. Cabling the storage subsystem 59
One DS3950 and two storage expansion enclosures
If you are cabling one DS3950 storage subsystem and two storage expansion
enclosures, connect one storage expansion enclosure per controller drive port as
shown in Figure 37. Figure 38 on page 61 shows that you can also connect two
expansion enclosures together behind a single controller drive port. Although this
is technically correct, use the topology as shown in Figure 37.
As Figure 37 shows, when you connect additional storage expansion enclosures,
you can connect them by using the additional port of the drive channel.
Port 2, drive channel 1
Storage
subsystem
Port 1, drive channel 1
1A
1B
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
1A
1B
1A
1B
Figure 37. Cabling for one DS3950 and two storage expansion enclosures
When you connect additional storage expansion enclosures, you can connect them
by continuing the connection from the existing redundant drive channel pair.
60 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Important: Do not cable the DS3950 storage subsystem and two storage expansion
enclosures as shown in Figure 38. A storage array with the incorrect
storage topology might appear to be functional, but incorrect cabling
can potentially have unpredictable results.
Port 2, drive channel 1
Storage
Port 1, drive channel 1
subsystem
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
1A
1B
1A
1B
1A
1B
Figure 38. Incorrect cabling of one DS3950 and two storage expansion enclosures
Chapter 3. Cabling the storage subsystem 61
One DS3950 and three storage expansion enclosures
If you are cabling one DS3950 storage subsystem and three storage expansion
enclosures, Figure 39 shows the correct cabling topology.
Port 2, drive channel 1
Storage
subsystem
Port 1, drive channel 1
1A
1B
1A
1B
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
1A
1B
1A
1B
1A
1B
Figure 39. Cabling for one DS3950 and three storage expansion enclosures
62 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
One DS3950 and four storage expansion enclosures
If you are cabling one DS3950 storage subsystem and four storage expansion
enclosures, Figure 40 shows the correct cabling topology.
Storage
subsystem
Port 2, drive channel 1
Port 1, drive channel 1
1A
1B
1A
1A
1B
1A
Port 1, drive channel 2
Port 2, drive channel 2
1B
1B
1A
1B
1A
1B
1A
1B
1A
1B
Figure 40. Cabling for one DS3950 and four storage expansion enclosures
Chapter 3. Cabling the storage subsystem 63
One DS3950 and up to six storage expansion enclosures
If you are cabling one DS3950 storage subsystem and up to six storage expansion
enclosures, Figure 41 shows the correct cabling topology.
Port 2, drive channel 1
Storage
subsystem
Port 1, drive channel 1
1A
1B
1A
1B
1A
1B
1A
1B
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
Figure 41. Cabling for one DS3950 and up to six storage expansion enclosures
64 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
Figure 42 on page 66 shows a cabling topology that is incorrect because all six
storage expansion enclosures are connected to a single drive port of the
dual-ported drive channel in each controller.
Chapter 3. Cabling the storage subsystem 65
Important: Do not cable the storage subsystem and storage expansion enclosures
as shown in Figure 42. A storage array with the incorrect storage
topology might appear to be functional, but incorrect cabling can
potentially have unpredictable results.
Storage
subsystem
Port 2, drive channel 1
Port 1, drive channel 1
1A
1B
1A
1A
1B
1A
1A
1B
1A
Port 1, drive channel 2
Port 2, drive channel 2
1B
1B
1B
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
Figure 42. Cabling for one DS3950 and up to six storage expansion enclosures
One DS3950 and two or more storage expansion enclosures in a
mixed configuration
A mixed configuration is a configuration in which you have more than one type of
storage expansion enclosure. Figure 43 on page 67 shows the cabling topology if
you have three EXP395s and three EXP810s attached to the DS3950. (The EXP395s
66 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
are denoted in the graphic as 1 while the EXP810s are denoted as 2.)
EXP395
EXP395
EXP395
Storage
subsystem
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
Port 2, drive channel 1
Port 1, drive channel 1
EXP810
EXP810
EXP810
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
1A
1B
Figure 43. Cabling for one DS3950 and two or more storage expansion enclosures in a
mixed environment
DS3950 storage subsystem and supported storage expansion
enclosure drive cabling schemes
The DS3950 supports only EXP395 and EXP810 storage expansion enclosures. To
attach one or more EXP810 storage expansion enclosures to the DS3950 storage
subsystem, you must purchase the Attach EXP810 to DS3950 Activation feature
option. Contact your IBM marketing representative for more information about
purchasing feature options.
The cabling schemes for the EXP395 and EXP810 storage expansion enclosures are
the same. This section describes the instructions only for the EXP395; use the same
diagrams and procedures to cable the DS3950 to one or more EXP810 storage
expansion enclosures.
The following sections show cabling schemes for supported storage expansion
enclosures and the DS3950 storage subsystem:
v “One DS3950 and one EXP395 storage expansion enclosure” on page 70
v “One DS3950 and two EXP395 storage expansion enclosures” on page 71
v “One DS3950 and three or more EXP395 storage expansion enclosures” on page
72
DS3950 storage subsystem drive cabling rules
Refer to these general rules when you complete the cabling steps in the cabling
schemes described in this section.
Chapter 3. Cabling the storage subsystem 67
1. Do not connect a combination of more than six EXP395 or EXP810 storage
expansion enclosures to the two ports of a dual-ported drive channel. Failure
to observe this limitation might result in loss of data availability. In the
DS3950 storage subsystem environment, no more than six EXP395 or EXP810
storage expansion enclosures can be connected to the two ports of a
dual-ported drive channel because of the internal drive slots in the DS3950
storage subsystem.
2. Do not connect more than four EXP395 or EXP810 storage expansion
enclosures to each port of a dual-ported drive channel.
3. Add storage expansion enclosures to the storage subsystem drive ports in a
round-robin fashion. For example, if you have four drive expansion enclosures
to be cabled to the storage subsystem, instead of cabling all four drive
expansion enclosures to one drive port of a drive channel, distribute the
enclosures to all drive ports, which results in one enclosure per drive port of a
drive channel.
4. Do not connect more than the maximum number of enclosures per drive
channel, which is eight for EXP395s and EXP810s.
5. The DS3950 storage subsystem supports the connection of a maximum of six
storage expansion enclosures per redundant drive channel loop and supports
one redundant drive channel loop pair. Failure to observe this limitation
might result in loss of data availability.
6. The DS3950 currently supports a maximum of 112 drives in six 16-drive
storage expansion enclosures per drive channel in each controller. One drive
channel from each of controllers A and B must be connected to the same set of
storage expansion enclosures to provide drive channel redundancy. Do not
connect a combination of more than six storage expansion enclosures to the
two ports of a single drive channel.
7. When connecting six storage expansion enclosures to a DS3950, use all ports
in both drive channels. See Figure 41 on page 64 for the cabling topology.
8. Connect a maximum of four EXP395s or EXP810s per DS3950 controller drive
port.
9. When mixing different types of storage expansion enclosures in the same
drive channel pair, the link rate Setting must be the same for each storage
expansion enclosure. IBM does not support different enclosure speed settings
in the same drive channel.
10. The controller drive ports of the DS3950 storage subsystem controllers must
always be connected to ports labeled 1B in both the right and left ESMs of the
EXP810s in the redundant drive channel/loop pair that is connected to the
DS3950 storage subsystem. Figure 44 on page 69 shows the location of the
ports.
11. To attach EXP810 storage expansion enclosures to the DS3950, you must
purchase the Attach EXP810 to DS3950 Activation feature option. Contact your
IBM marketing representative for more information.
12. To attach 33 - 64 additional drives to the DS3950, you must purchase the
DS3950 Drive Attach 33 - 64 feature option. To attach 65 - 112 additional
drives to the DS3950. you must purchase the DS3950 Drive Attach 65- 112
feature option in addition to the DS3950 Drive Attach 33 - 64 feature option.
Contact your IBM marketing representative for more information.
68 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
ESM
port 1B
ESM
port 1A
ESM A
ESM A
Drive channel
EXP810
ESM
port 1B
EXP810
port
ESM
port 1A
ESM
port 1A
ESM
port 1A
ESM
port 1A
ESM
port 1B
ESM B
Other storage
expansion
enclosures
ESM B
Last EXP810
storage expansion
enclosure
First EXP810
storage expansion
enclosure
Storage
subsystem
Drive channel
port
Figure 44. DS3950 drive ports connected to EXP810 ESM ports labeled 1B
13. The DS3950 supports the intermix of SATA and Fibre Channel E-DDMs within
the same drive enclosure.
Chapter 3. Cabling the storage subsystem 69
One DS3950 and one EXP395 storage expansion enclosure
Figure 45 shows the cabling scheme for one DS3950 storage subsystem and one
EXP395 storage expansion enclosure.
Port 2, drive channel 1
Storage
subsystem
EXP395
Figure 45. Cabling for one DS3950 and one EXP395 storage expansion enclosure
Port 1, drive channel 1
1A
1B
1A
1B
Port 1, drive channel 2
Port 2, drive channel 2
Perform the following steps to create the cabling scheme shown in Figure 45:
1. Connect either port 2 or port 1 of the dual-ported drive channel 1 in controller
A on the DS3950 to port 1B on the left ESM of the EXP395.
2. Connect either port 1 or port 2 of the dual-ported drive channel 2 in controller
B on the DS3950 to port 1B on the right ESM of the EXP395.
70 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
One DS3950 and two EXP395 storage expansion enclosures
Figure 46 shows the cabling scheme for one DS3950 storage subsystem and two
EXP395 storage expansion enclosures behind both ports of a dual-ported drive
channel.
Port 2, drive channel 1
Storage
subsystem
EXP395 one
Port 1, drive channel 1
1A
1B
1A
1B
Port 1, drive channel 2
Port 2, drive channel 2
EXP395 two
1A
1B
1A
1B
Figure 46. One DS3950 and two EXP395 storage expansion enclosures behind a pair of
DS3950 drive ports
Perform the following steps to create the cabling scheme shown in Figure 46:
1. Connect port 2 of drive channel 1 on the DS3950 to port 1B on the left ESM in
the EXP395 one.
2. Connect port 1B on the right ESM in EXP395 one to port 1 of drive channel 2
on the DS3950.
3. Connect port 1 of drive channel 1 on the DS3950 to port 1B on the left ESM in
EXP395 two.
4. Connect port 1B on the right ESM in EXP395 two to port 2 of drive channel 2
on the DS3950.
Chapter 3. Cabling the storage subsystem 71
One DS3950 and three or more EXP395 storage expansion
enclosures
To connect three or more storage expansion enclosures to a DS3950 storage
subsystem, alternately connect a storage expansion enclosure to one of the drive
ports of the dual-ported drive channel then connect to the other port until all of
the storage expansion enclosures are attached. Figure 47 shows the cabling scheme
for one DS3950 storage subsystem and three EXP395 storage expansion enclosures
behind both ports of a dual-ported drive channel.
Port 2, drive channel 1
Storage
subsystem
EXP395 one
Port 1, drive channel 1
1A
1B
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
EXP two395
1A
1B
1A
1B
EXP three395
1A
1B
1A
1B
Figure 47. One DS3950 and three EXP395 storage expansion enclosures behind a pair of
DS3950 drive ports
Perform the following steps to create the cabling scheme shown in Figure 47:
1. Connect port 1A on the left ESM in EXP395 one to port 1B on the left ESM in
EXP395 two.
2. Connect port 1A on the right ESM in EXP395 two to port 1B on the right ESM
in EXP395 one.
3. Connect port 1B on the left ESM in EXP395 one to port 2 of drive channel 1 on
the DS3950.
72 IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide
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