IBM 7133 D40, 7133 T40 Operator's Manual
7133 Models D40 and T40
Serial Disk Systems
Operator Guide
SA33-3278-02
7133 Models D40 and T40
Serial Disk Systems
Operator Guide
SA33-3278-02
Third Edition (May 1999)
This major revision supersedes SA33-3278-01. Because technical changes have occurred, revision bars are shown.
The publication should be read in its entirety.
The following paragraph does not apply to any country where such provisions are inconsistent with local law:
THIS PUBLICATION IS PRINTED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions;
therefore, this statement may not apply to you.
This publication could contain technical inaccuracies or typographical errors. Changes are periodically made to the
information herein; these changes will be incorporated in new editions of the publication.
It is possible that this publication may contain reference to, or information about, products (machines and programs),
programming, or services that are not announced in your country. Such references or information must not be
construed to mean that such products, programming, or services will be offered in your country. Any reference to a
licensed program in this publication is not intended to state or imply that you can use only the licensed program
indicated. You can use any functionally equivalent program instead.
© Copyright International Business Machines Corporation, 1998, 1999. All rights reserved.
Note to U.S. Government Users – Documentation related to restricted rights – Use, duplication, or disclosure is subject
to restrictions set forth in the GSA ADP Schedule Contract.
Contents
Communications Statements ...................v
Federal Communications Commission (FCC) Statement ..........v
Japanese Voluntary Control Council for Interference (VCCI) Statement......v
Korean Government Ministry of Communication (MOC) Statement .......v
New Zealand Compliance Statement .................v
International Electrotechnical Commission (IEC) Statement .........vi
Avis de conformitéàla réglementation d’Industrie Canada .........vi
Industry Canada Compliance Statement................vi
United Kingdom Telecommunications Requirements ............vi
European Union (EU) Statement ..................vi
Radio Protection for Germany ...................vi
Taiwan Class A Compliance Statement ................vii
Safety Notices ........................ix
Definitions of Safety Notices....................ix
Installing, Relocating, or Servicing..................ix
Acoustic Noise Declaration ....................ix
About This Book .......................xi
Who Should Use This Book ....................xi
What This Book Contains ....................xi
If You Need More Information ...................xi
Web Support Pages ......................xii
Numbering Convention .....................xii
Chapter 1. Using the Subsystems .................1
Rack-Mounted Unit Configurations..................1
Deskside Unit Configurations ...................2
Controls and Lights.......................3
Subsystem Controls .....................4
Disk Drive Module Lights ....................7
Fan Assembly Lights .....................10
Power-Supply Assembly Lights and Switch .............12
Identifying 7133 Units .....................14
Identifying Disk Drive Modules...................14
Security ..........................15
Disk Drive Module Locks ...................15
Deskside Unit Cover Locks...................17
Ordering Cover-Lock Keys ...................17
Chapter 2. Adding Disk Drive Modules ...............21
Before Adding a Disk Drive Module .................22
To Add a Disk Drive Module ...................24
Chapter 3. Moving a 7133 Model D40 or T40 Safely...........33
Chapter 4. Dealing with Problems .................35
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Starting to Deal with Problems ..................35
Additional problem indications ..................35
Changing Disk Drive Modules ...................36
Before Changing a Disk Drive Module ...............37
To Change a Disk Drive Module .................38
Changing Fan Assemblies ....................49
Before Changing a Fan Assembly ................49
To Change a Fan Assembly ..................50
Changing Power-Supply Assemblies.................56
Before Changing a Power-Supply Assembly .............56
To Change a Power-Supply Assembly ...............57
Reporting Problems ......................69
Appendix A. Operating with RISC Systems .............71
Related Publications ......................71
Web Support Pages ......................71
Starting SSA Service Aids ....................71
Identifying 7133 Models D40 and T40 Units and Disk Drive Modules ......71
Location Code Format for 7133 systems ..............72
Pdisks, Hdisks, and Disk Drive Module Identification ..........72
Identifying a subsystem or Disk Drive Module and Using Service Mode ....73
Problem Determination .....................77
Checking the SSA Error Log ...................77
Service Aids.........................77
Physical Link Configuration...................78
Enclosure Configuration ....................79
Enclosure Environment ....................80
Enclosure Settings .....................81
Command Line Tools......................82
ssaencl Command .....................82
Appendix B. Operating with PC Servers...............85
Related Publications ......................85
Web Support Pages ......................85
Service Aids.........................85
Identifying 7133 Models D40 and T40 Units and Disk Drive Modules ......86
Location Code Format for 7133 systems ..............86
Identifying a subsystem or Disk Drive Module Using Service Mode .....87
Problem Determination .....................87
Checking the SSA Error Log ...................87
Command Line Tools......................88
Index ...........................89
iv 7133 Models D40 and T40 Operator Guide
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Communications Statements
The following statements apply to this product. The statements for other products
intended for use with this product appear in their accompanying manuals.
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference, in which case the user will be required to correct the
interference at his own expense.
Properly shielded and grounded cables and connectors must be used in order to meet
FCC emission limits. Neither the provider nor the manufacturer is responsible for any
radio or television interference caused by using other than recommended cables and
connectors or by unauthorized changes or modifications to this equipment.
Unauthorized changes or modifications could void the user’s authority to operate the
equipment.
This device complies with Part 15 of FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
Japanese Voluntary Control Council for Interference (VCCI) Statement
This product is a Class A Information Technology Equipment and conforms to the
standards set by the Voluntary Control Council for Interference by Information
Technology Equipment (VCCI). In a domestic environment, this product might cause
radio interference, in which event the user might be required to take adequate
measures.
Korean Government Ministry of Communication (MOC) Statement
Please note that this device has been approved for business purposes with regard to
electromagnetic interference. If you find that this device is not suitable for your use, you
can exchange it for one that is approved for non-business purposes.
New Zealand Compliance Statement
This is a Class A product. In a domestic environment this product might cause radio
interference, in which event the user might be required to take adequate measures
v
International Electrotechnical Commission (IEC) Statement
This product has been designed and built to comply with (IEC) Standard 950.
Avis de conformité à la réglementation d’Industrie Canada
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
Industry Canada Compliance Statement
This Class A digital apparatus complies with IECS-003.
United Kingdom Telecommunications Requirements
This apparatus is manufactured to the International Safety Standard EN60950 and as
such is approved in the U.K. under approval number NS/G/1234/J/100003 for indirect
connection to public telecommunications systems in the United Kingdom.
European Union (EU) Statement
This product is in conformity with the protection requirements of EU council directive
89/336/EEC on the approximation of the laws of the Member States relating to
electromagnetic compatibility. Neither the provider nor the manufacturer can accept
responsibility for any failure to satisfy the protection requirements resulting from a
non-recommended modification of the product, including the fitting of option cards not
supplied by the manufacturer.
Radio Protection for Germany
Zulassungsbescheinigung laut Gesetz über die elektromagnetische Verträglichkeit
von Geräten (EMVG) vom 30, August 1995.
Dieses Gerät ist berechtigt in Übereinstimmung mit dem deutschen EMVG das
EG–Konformitätszeichen zu führen.
Der Aussteller der Konformitätserklärung ist die IBM Deutschland.
Informationen in Hinsicht EMVG Paragraph 3 Abs. (2):
Das Gerät erfüllt die Schutzanforderungen nach EN 50082-1 und EN 55022 Klasse A.
EN55022 Klasse A Geräte bedürfen folgender Hinweise:
Nach dem EMVG: “Geräte dürfen an Orten, für die sie nicht ausreichend entstört sind,
nur mit besonderer Genehmigung des Bundesministeriums für Post und
Telekommunikation oder des Bundesamtes für Post und Telekommunikation betrieben
werden. Die Genehmigung wird erteilt, wenn keine elektromagnetischen Störungen zu
erwarten sind.” (Auszug aus dem EMVG, Para.3, Abs.4). Dieses
vi 7133 Models D40 and T40 Operator Guide
Genehmigungsverfahren ist nach Paragraph 9 EMVG in Verbindung mit der
entsprechenden Kostenverordnung (Amtsblatt 14/93) kostenpflichtig.
Nach der EN 55022: “Dies ist eine Einrichtung der Klasse A. Diese Einrichtung kann im
Wohnbereich Funkstörungen verursachen; in diesem Fall kann vom Betreiber verlangt
werden, angemessene Massnahmen durchzuführen und dafür aufzukommen.”
Anmerkung: Um die Einhaltung des EMVG sicherzustellen, sind die Geräte wie in den
Handbüchern angegeben zu installieren und zu betreiben.
Taiwan Class A Compliance Statement
Communications Statements vii
viii 7133 Models D40 and T40 Operator Guide
Safety Notices
For a translation of DANGER and CAUTION safety notices, see the 7133 Translated
Safety Information manual, SA33-3274.
Definitions of Safety Notices
A danger notice indicates the presence of a hazard that has the potential of causing
death or serious injury.
A Danger notice appears on page 63
A caution notice indicates the presence of a hazard that has the potential of causing
moderate or minor personal injury.
Caution notices appear on pages 51,58, and 61.
An attention notice indicates an action that could cause damage to a program, device,
system, or data.
Installing, Relocating, or Servicing
Contact qualified service personnel.
Acoustic Noise Declaration
The equivalent continuous A-weighted sound pressure level at the bystander’s position
measured for a 7133 Model D40 does not exceed 45 dB(A). This level has been
measured for a 7133 Model D40 in the following situation:
v The 7133 Model D40 had 16 disk drive modules installed.
v The 7133 was installed in a 7202 Rack with the bottom of the 7133 system at EIA
position 17.
v The rest of the rack was fully populated with units to which power was not
connected.
The equivalent continuous A-weighted sound pressure level at the bystander’s position
measured for a 7133 Model T40 does not exceed 51 dB(A). This level has been
measured for a 7133 Model T40 with 16 disk drive modules installed.
These levels were measured using a procedure in accordance with ISO standard
DIS7779, Measurement of Airborne Noise Emitted by Computer and Business
Equipment. The equipment was installed and operated as described in Appendix C.8 of
that standard.
ix
x 7133 Models D40 and T40 Operator Guide
About This Book
This preface introduces the book.
The latest copies of this book can be found on the SSA World Wide Web page. You are
advised to check on that page for any updates to this book. The URL for that page is:
http://www.hursley.ibm.com/ssa/
Who Should Use This Book
This book is for people operating a system that has one or more 7133 Model D40 or
T40 Serial Disk Systems connected to it. These systems are Serial Storage Architecture
(SSA) disk subsystems.
What This Book Contains
This book describes the 7133 Models D40 and T40 Serial Disk Systems and shows the
positions of the controls. It explains the function of each of the lights.
This book describes how to add certain features, such as additional disk drive modules,
to a 7133 unit.
This book describes how to replace certain failed components, such as disk drive
modules, and what to report if you need to call your service representative for
assistance.
If you need the same type of information for a 7133 Model 010, 020, 500, or 600
subsystem, refer the 7133 Serial Disk System: Operator Guide, GA33-3259.
If You Need More Information
Other books that you may need are:
v 7133 Model D40 Serial Disk System: Installation Guide, GA33-3279
v 7133 Model T40 Serial Disk System: Installation Guide, GA33-3280
v 7133 Translated Safety Information, SA33-3274
v The Operator Guide for your system
v The User’s Guide for your using-system SSA attachment (for example, your SSA
adapter)
v The Site and Hardware Planning Information for your system
v The Problem Solving Guide and Reference for your system.
xi
Web Support Pages
When performing SSA device or subsystem planning, installation, upgrades, or
preventive maintenance, please refer to the following web support pages. These pages
should also be reviewed in preparation for system hardware or operating system
upgrades if SSA devices are included in the configuration. These web pages provide
access to the latest SSA publications and support code for the using system, SSA
adapters and SSA subsystems.
http://www.hursley.ibm.com/ssa/ - Contains links to SSA publications and other SSA
web pages, including the ones below.
http://www.hursley.ibm.com/ssa/rs6k/ - Contains lists of the latest SSA support code
and provides download capability for the RS/6000 and AIX environments.
http://www.hursley.ibm.com/ssa/pcserver/ - Contains lists of the latest SSA support
code and provides code download capability for PC Server environments.
Numbering Convention
In this book:
KB means 1 000 bytes.
MB means 1 000 000 bytes.
GB means 1 000 000 000 bytes.
xii 7133 Models D40 and T40 Operator Guide
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Chapter 1. Using the Subsystems
This section describes the 7133 Models D40 and T40 Serial Disk Systems, their
controls, and how to use them. These systems are Serial Storage Architecture (SSA)
disk subsystems.
For similar information about the 7133 Models 010, 020, 500, and 600 SSA Disk
Subsystems, refer to the 7133 SSA Disk Subsystem: Operator Guide, GA33-3259.
Rack-Mounted Unit Configurations
7133 Model D40 is a rack-mounted SSA disk storage unit that can be attached to any
computer that provides support for SSA. Up to 16 SSA disk drive modules, in groups of
up to four, can be installed in a Model D40 unit.
Each group of disk drives in a 7133 unit is connected in a loop that must also contain
an SSA adapter. An SSA loop can also contain other groups of disk drives and
additional SSA adapters. The rules for connecting SSA loops and details of simple
configurations are described in the 7133 Model D40: Installation Guide.
With a 7133 Model D40, an Advanced SSA Optical Extender (Pair) feature can be
installed. This allows the 7133 unit to be connected by fibre optic cables to host
systems or other SSA units up to 10 km (32800 feet) away.
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A fully configured 7133 Model D40 looks like this:
Disk drives
The whole of the front cover hinges downward to give access to the disk drive modules
installed at the front of 7133 units.
If your operating system implements the function, it can configure a 7133 Model D40, in
addition to the disk drives within it, as a device.
Deskside Unit Configurations
7133 Model T40 is a deskside SSA disk storage unit that can be attached to any
computer that provides support for SSA. Up to 16 SSA disk drive modules, in groups of
up to four, can be installed in a Model T40 unit.
Each group of disk drives in a 7133 unit is connected in a loop that must also contain
an SSA adapter. An SSA loop can also contain other groups of disk drives and
additional SSA adapters. The rules for connecting SSA loops and details of simple
configurations are described in the 7133 Model T40: Installation Guide.
With a 7133 Model T40, an Advanced SSA Optical Extender (Pair) feature can be
installed. This allows the 7133 unit to be connected by fibre optic cables to host
systems or other System units up to 10 km (32800 feet) away.
2 7133 Models D40 and T40 Operator Guide
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A fully configured 7133 Model T40 looks like this:
The front and back covers hinge to the left to give access to the disk drive modules
installed behind them. Locks are provided on the covers to prevent unauthorized access
to the disk drive modules and system connections.
If your operating system implements the function, it can configure a 7133 Model T40, in
addition to the disk drives within it, as a device.
Controls and Lights
This section describes the Power switch and lights on a 7133 Model D40 or T40 unit.
If you leave the 7133 Power switch set to on, power within a 7133 unit is turned on and
off automatically:
v For a Model D40, when you turn power on and off to the rack containing the unit
v For any 7133 model, if it has the Remote Power On Control feature installed, when
you turn power on and off to your system unit.
During normal operations, you do not need to check the lights on 7133 units.
Chapter 1. Using the Subsystems 3
Subsystem Controls
You can see the 7133 Subsystem lights at the front of each 7133 unit. The subsystem
Power switch and other controls are behind a flap on the front cover. To reach these,
push the latch button and hinge the flap to the left.
Latch button
Model D40 Model T40
4 7133 Models D40 and T40 Operator Guide
With the flap open, you can see all the controls:
Disk drive status lights
ID push buttons
ID display Power/Standby SwitchPower light
Check light
Disk drive
status lights
ID push buttons
ID display
Power switchPower light
Check light
Model D40
ModelT40
Serial Number
Serial Number
Power switch
In the 7133 Model D40, the Power switch, labeled Power/Standby, controls
electrical power from the power-supply units within the 7133 unit to the disk
drives and other components. To connect this internal electrical power, press
the Power switch. To remove this power, press the switch again. (When you
have pressed this switch to remove the internal power and the Power light is
flashing, mainline electrical power can still be present within the 7133
rack-mounted unit. To remove electrical power completely from the unit,
disconnect the mainline electrical supply.)
In the 7133 Model T40, the Power switch controls the main electrical power
into the 7133 unit. To connect main electrical power, press the Power switch.
To remove this power, press the switch again.
Chapter 1. Using the Subsystems 5
Attention: Pressing these switches when the Power light is on can cause a
system fault unless you first make the disk drives within the 7133 unit
unavailable to the operating system. To do this:
1. Use the system-management task menus of the operating system to make
the disk drives unavailable to the system.
2. If the 7133 unit is connected to more than one adapter, make the disk
drives unavailable to the system or systems for each of the paths to the
system.
Power light
The Power light, which is green, comes on permanently when the
power-supply units within the 7133 subsystem are supplying power to the rest
of the subsystem. When the subsystem is in standby mode, this light will be
flashing. In standby mode, the power-supply units do not supply power to the
drives. This mode is set by the power/standby switch on the Model D40 or
remotely on either model if the remote power option is installed.
Check light
The Check light, which is amber, comes on if a failure occurs within the 7133
unit. The unit might be able to continue operating satisfactorily even when the
failure of a single part has been detected. The light can be set flashing by an
SSA service aid to identify the failing 7133.
ID display
The ID display is a four-character display that can be set by the three ID push
buttons.
This display normally shows the ID of the 7133 unit. If a failure occurs within
the 7133 unit, an error ID for the failure is shown, alternating with the ID of the
7133 unit; “Identifying 7133 Units” on page 14 describes these how to set the
7133 IDs, the 7133 Models D40 and T40 Serial Disk Systems: Service Guide,
GY33–0192–02, describes the error IDs.
ID push buttons
You can use these push buttons to set the ID of the 7133 unit that is shown in
the ID display. Use a ball-point pen or similar instrument to press these push
buttons.
v The left button steps through the four character positions, one position at a
time, to select the character position that you want to set.
v The center button steps through the available characters, one character at a
time, to select a character.
v The right button stores the selected ID.
If no push button is pressed within 10 seconds, the display resets to its last
valid setting.
6 7133 Models D40 and T40 Operator Guide
Disk Drive Status lights
These 16 green lights show the status of the disk drives that are installed in
the 7133 unit. The upper row of lights relate to the disk drives that are installed
at the front of the unit, 1 through 8, from left to right. The lower row represents
the disk drives that are installed at the back of the unit, 9 through 16, from
right to left.
Each status light shows the following conditions:
Permanently on
Both SSA links to the disk drive are active, and the disk drive is ready
to accept commands from the using system.
Off Both SSA links to the disk drive are inactive because of one of the
following conditions:
v The disk drive modules, dummy disk drive modules, or SSA
adapters that should be connected to each side of this module are
missing or not connected.
v The disk drive modules or dummy disk drive modules that are
connected to each side of this module are inactive.
v An SSA adapter in the same SSA loop as this module is inactive.
v A power-on self-test (POST) is running on this disk drive.
Slow flash (two seconds on, two seconds off)
Only one of the SSA links to this disk drive module is active.
Fast flash (five times per second)
This disk drive module is active with a command in progress.
Disk Drive Module Lights
To see the lights on disk drive modules installed in the front part of a 7133 Model D40
or T40 unit:
v For a Model D40, open the front cover by pivoting it downward
v For a Model T40, open the front cover by:
1. If necessary, unlocking the cover using the key provided
2. Gripping the front cover on the right and pivoting it to the left.
Chapter 1. Using the Subsystems 7
To see the lights on disk drive modules installed at the back of a 7133 Model D40 or
T40:
v For a Model D40, open the back door of the rack containing the 7133.
v For a Model T40, open the back cover of the 7133 by:
1. If necessary, unlocking the cover using the key provided
2. Gripping the back cover on the right and pivoting it to the left.
Lock
8 7133 Models D40 and T40 Operator Guide
Each disk drive module has two lights.
Check Light
Ready Light
Ready light
The Ready light, which is green, shows the following conditions:
Permanently on
Both SSA links to the disk drive are active, and the disk drive is ready
to accept commands from the using system.
Off Both SSA links to the disk drive are inactive because of one of the
following conditions:
v The disk drive modules, dummy disk drive modules, or SSA
adapters that should be connected to each side of this module are
missing or not connected.
v The disk drive modules or dummy disk drive modules that are
connected to each side of this module are inactive.
v An SSA adapter in the same SSA loop as this module is inactive.
v A power-on self-test (POST) is running on this disk drive.
The Ready lights on the disk drive modules within a 7133 are
repeated on the front cover of the 7133, as the Disk Drive Status
lights.
Slow flash (two seconds on, two seconds off)
Only one of the SSA links to this disk drive module is active.
Fast flash (five times per second)
This disk drive module is active with a command in progress.
Chapter 1. Using the Subsystems 9
The status light for this disk drive, at the front cover of the 7133 unit, shows
the same conditions as this light.
Check light
The Check light, which is amber, shows the following conditions:
Off Normal operating condition
Permanently On
One of the following conditions exists:
v An unrecoverable error that prevents the normal operation of the
SSA links to the disk drive has been detected.
v Neither SSA link to the disk drive is active.
v The power-on self-tests (POSTs) are running or have failed. The
light comes on as soon as the disk drive is switched on, and goes
off when the POSTs are completed successfully. If the light remains
on for longer than one minute after the disk drive is switched on,
the POSTs have failed.
v The disk drive is in service mode, and can be removed from the
7133 unit.
Flashing
The Check light has been set by an SSA service aid to identify the
position of this disk drive module.
Fan Assembly Lights
Three fan assemblies are installed in the front of 7133 Models D40 and T40 units. To
see their lights:
v For a Model D40, open the cover of the 7133 by pivoting it downward.
v For a Model T40, open the front cover of the 7133 by:
1. If necessary, unlocking the cover using the key provided.
2. Gripping the front cover on the right and pivoting it to the left.
10 7133 Models D40 and T40 Operator Guide
assemblies
Fan
assemblies
Fan
The fan assemblies have the following lights:
Check light
Power light
Power light
The Power light, which is green, comes on when the power supply is
connected to the fan assembly.
Check light
The Check light, which is amber, comes on and remains on if the fan assembly
fails.
Chapter 1. Using the Subsystems 11
Power-Supply Assembly Lights and Switch
Two power-supply assemblies are installed in the back of 7133 Models D40 and T40
units. To see the power-supply assemblies:
v For a Model D40, open the back door of the rack containing the 7133.
v For a Model T40, open the back cover of the 7133 by:
1. If necessary, unlocking the cover using the key provided
2. Gripping the back cover on the right and pivoting it to the left.
Supply AssembliesSupply Assemblies
The power-supply assemblies have the following lights and switch:
PWR/FAULT RESET
CHK/PWR-GOOD
PWR light
PWR light
The Power light, which is green, comes on when the mainline power supply is
connected to the power-supply assembly.
CHK/PWR-Good light
This light can show one of two colors:
v Green, when electrical power is connected from the power-supply assembly
to the disk drives and other components in the 7133 unit.
12 7133 Models D40 and T40 Operator Guide
v Amber, when the power-supply unit fails.
PWR/FAULT RESET switch
The PWR/FAULT RESET switch connects electrical power from the
power-supply assembly to the disk drives and other components in the 7133
unit.
Chapter 1. Using the Subsystems 13
Identifying 7133 Units
During normal operations, the four-character ID display at the front of the 7133 Model
D40 or T40 unit shows the ID of the unit. (“Subsystem Controls” on page 4 shows the
position of the ID display.) You can set these IDs by using the three ID push buttons.
The four-character alphanumeric display may show the location and ID of the 7133. For
example, on a rack-mounted Model D40, you can use two digits to show the ID of the
rack, and two digits to show the ID of the 7133, while on a Model T40, you can use all
four digits to show the ID of the 7133. You can set the ID display to represent whatever
you require. The resulting ID must, however, be unique.
Identifying Disk Drive Modules
You can use an SSA service aid to make the Check light on a particular disk drive
module flash. The status light for that disk drive, at the front of the 7133 unit, also
flashes. The appendix for your system, later in this manual, describes how to do this.
You can identify a disk drive module by the serial number that appears on a label on
the front of the module:
Serial Number
14 7133 Models D40 and T40 Operator Guide
Security
To protect your disk drives from unauthorized access, locks are provided on the covers
of deskside units and are available as accessories to secure individual disk drive
modules.
Disk Drive Module Locks
Disk drive module locks prevent the unauthorized removal of disk drive modules from
either rack-mounted units or deskside units. You need one lock for each disk drive
module that you want to secure.
Note: The disk drive module locks for use in 7133 Models D40 and T40 units are
different from the locks for use in 7133 Models 010, 02, 500, and 600 units.
To lock a disk drive module into a 7133 Model D40 or T40 unit:
1. Put the end of the lock into the hole at the bottom of the front of the disk drive
module.
Chapter 1. Using the Subsystems 15
2. Push the lock up to the front of the disk drive module.
3. Put the key into the lock and turn the key clockwise half a turn.
16 7133 Models D40 and T40 Operator Guide
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