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serial ATA. The standard for a high-speed alternative
to small computer system interface (SCSI) hard drives.
The SATA-1 standard is equivalent in performance to a
10 000 RPM SCSI drive.
serial storage architecture (SSA). An interface
specification from IBM in which devices are arranged in
a ring topology. SSA, which is compatible with small
computer system interface (SCSI) devices, allows
full-duplex packet multiplexed serial data transfers at
rates of 20 Mbps in each direction.
server. A functional hardware and software unit that
delivers shared resources to workstation client units on
a computer network.
server/device events. Events that occur on the server
or a designated device that meet criteria that the user
sets.
SFP. See small form-factor pluggable.
Simple Network Management Protocol (SNMP). In
the Internet suite of protocols, a network management
protocol that is used to monitor routers and attached
networks. SNMP is an application layer protocol.
Information on devices managed is defined and stored
in the application’s Management Information Base
(MIB).
SL_port. See segmented loop port.
SMagent. The DS Storage Manager optional
Java-based host-agent software, which can be used on
Microsoft Windows, Novell NetWare, AIX, HP-UX,
Solaris, and Linux on POWER host systems to manage
storage subsystems through the host fibre-channel
connection.
SMclient. The DS Storage Manager client software,
which is a Java-based graphical user interface (GUI)
that is used to configure, manage, and troubleshoot
storage servers and storage expansion enclosures in a
DS5020 storage subsystem. SMclient can be used on a
host system or on a storage management station.
SMruntime. A Java compiler for the SMclient.
SMutil. The DS Storage Manager utility software that
is used on Microsoft Windows, AIX, HP-UX, Solaris, and
Linux on POWER host systems to register and map
new logical drives to the operating system. In Microsoft
Windows, it also contains a utility to flush the cached
data of the operating system for a particular drive before
creating a FlashCopy.
small computer system interface (SCSI). A standard
hardware interface that enables a variety of peripheral
devices to communicate with one another.
small form-factor pluggable (SFP). An optical
transceiver that is used to convert signals between
optical fiber cables and switches. An SFP is smaller
than a gigabit interface converter (GBIC). See also
gigabit interface converter.
SNMP. See Simple Network Management Protocol and
SNMPv1.
SNMP trap event. (1) (2) An event notification sent by
the SNMP agent that identifies conditions, such as
thresholds, that exceed a predetermined value. See
also Simple Network Management Protocol.
SNMPv1. The original standard for SNMP is now
referred to as SNMPv1, as opposed to SNMPv2, a
revision of SNMP. See also Simple Network
Management Protocol.
SRAM. See static random access memory.
SSA. See serial storage architecture.
static random access memory (SRAM). Random
access memory based on the logic circuit know as
flip-flop. It is called static because it retains a value as
long as power is supplied, unlike dynamic random
access memory (DRAM), which must be regularly
refreshed. It is however, still volatile, meaning that it can
lose its contents when the power is turned off.
storage area network (SAN). A dedicated storage
network tailored to a specific environment, combining
servers, storage products, networking products,
software, and services. See also fabric.
Storage Array Identifier (SAI or SA Identifier). The
Storage Array Identifier is the identification value used
by the DS Storage Manager host software (SMClient) to
uniquely identify each managed storage server. The DS
Storage Manager SMClient program maintains Storage
Array Identifier records of previously-discovered storage
servers in the host resident file, which allows it to retain
discovery information in a persistent fashion.
storage expansion enclosure (EXP). A feature that
can be connected to a system unit to provide additional
storage and processing capacity.
storage management station. A system that is used
to manage the storage subsystem. A storage
management station does not need to be attached to
the storage subsystem through the fibre-channel
input/output (I/O) path.
storage partition. Storage subsystem logical drives
that are visible to a host computer or are shared among
host computers that are part of a host group.
storage partition topology. In the DS Storage
Manager client, the Topology view of the Mappings
window displays the default host group, the defined host
group, the host computer, and host-port nodes. The
host port, host computer, and host group topological
210 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide
- First Edition (July 2009) 4
- Contents 5
- Contents v 7
- Contents vii 9
- © Copyright IBM Corp. 2009 ix 11
- © Copyright IBM Corp. 2009 xi 13
- Safety xv 17
- Safety xvii 19
- Cable Warning: 20
- About this document 21
- General overview 22
- About this document xxi 23
- About this document xxiii 25
- Before you call 26
- Using the documentation 26
- Web sites 27
- Software service and support 28
- Hardware service and support 28
- Fire suppression systems 29
- Chapter 1. Introduction 31
- Base DS5020 features 32
- Operating system support 33
- Fibre Channel defined 33
- SATA defined 33
- Inventory checklist 33
- Best practices guidelines 35
- Storage subsystem components 36
- Chapter 1. Introduction 7 37
- Controllers 38
- Chapter 1. Introduction 9 39
- Controller B 40
- Chapter 1. Introduction 11 41
- AC power supply and fan units 43
- Battery units 44
- Figure 7. Backup battery unit 45
- SFP modules 46
- Chapter 1. Introduction 17 47
- Determining firmware levels 48
- 44.70 cm (17.60 in.) 49
- 12.95 cm (5.1 in.) 49
- 57.15 cm (22.5 in.) 49
- 48.26 cm (19.00 in.) 49
- Shipping dimensions 50
- Temperature and humidity 50
- Altitude 51
- Airflow and heat dissipation 51
- Acoustic noise 52
- Electrical requirements 53
- Chapter 1. Introduction 25 55
- Installation overview 57
- Ser i al n u m b er 58
- Machine type 58
- Model number 58
- Preparing for installation 59
- Tools and hardware required 61
- Preparing the site 61
- Preparing the rack cabinet 62
- Installing the support rails 62
- Installing the DS5020 66
- Removing the CRUs 66
- Removing a controller 67
- Removing an E-DDM 69
- Front of Rack 71
- M5 screws 71
- M4 screws 71
- Replacing an E-DDM 74
- Enclosure ID settings 75
- Enclosure ID 76
- Handling fiber-optic cables 77
- Installing SFP modules 78
- Removing SFP modules 80
- Protective cap 83
- Fibre-optic 83
- Redundant drive channel pair 85
- Redundant 86
- Drive Channel 86
- Port 2, drive channel 1 100
- Port 1, drive channel 1 100
- Port 1, drive channel 2 100
- Port 2, drive channel 2 100
- Host portsController A 113
- Host ports Controller B 113
- Host 1, Host Adapter 1 and 2 114
- Host 2, Host Adapter 1 and 2 114
- Cabling the ac power supply 121
- © Copyright IBM Corp. 2009 93 123
- Web pages 124
- Hardware responsibilities 124
- Firmware updates 129
- Checking the LEDs 131
- Front LEDs 132
- Battery unit LEDs 133
- Controller LEDs 134
- Seven-segment 138
- Diagnostic 138
- Cache memory 146
- Subsystem cache battery 147
- Figure 74. Battery unit LEDs 149
- Replacing a controller 152
- Class 1 Laser Product 153
- Laser Klasse 1 153
- Laser Klass 1 153
- Luokan 1 Laserlaite 153
- Apparell Laser de Calsse 1À 153
- Pro t ect i ve cap 154
- SFP m o d u l e 154
- Plastic tab 154
- Guide pin 155
- Working with hot-swap E-DDMs 156
- Installing hot-swap E-DDMs 158
- Tr ay h a n d l e 159
- Tr ay l a t c h 159
- Replacing hot-swap E-DDMs 160
- Replacing multiple E-DDMs 161
- Two on = 4 Gbps 167
- One on = 2 Gbps 167
- Link Rat e sw it ch 168
- (2 Gbps or 4 Gbps) 168
- Replacing a battery unit 174
- Replacing an SFP module 176
- Replacing a midplane 179
- Front cage frame screws 180
- Sc r e w 181
- Sc r e w s 181
- General checkout 183
- Solving problems 183
- Parts listing 190
- Appendix A. Records 193
- Sample information record 195
- Installed device records 196
- Rack Mounting 199
- Template 199
- Rack specifications 203
- EIA Hole Spacing 205
- Appendix D. Power cords 209
- Appendix D. Power cords 181 211
- Appendix F. Accessibility 225
- Trademarks 227
- Important notes 228
- Particulate contamination 229
- Documentation format 229
- Notices 201 231
- Glossary 233
- Glossary 205 235
- Glossary 207 237
- Glossary 209 239
- Glossary 211 241
- Index 215 245
- Index 217 247
- Part Number: 49Y0289 250
- Printed in USA 250
- (1P) P/N: 49Y0289 250
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