IBM EXP400 Type 1733 Hardware Maintenance Manual And Troubleshooting Manual

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IBM EXP400 Storage Expansion Unit
Type 1733

Hardware Maintenance Manual and Troubleshooting
Guide

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IBM EXP400 Storage Expansion Unit
Type 1733

Hardware Maintenance Manual and Troubleshooting
Guide

©

US

Note

Before using this information and the product it supports, be sure to read Appendix C, “Notices,” on
page 79.

Eighth Edition (April 2004)

Copyright International Business Machines Corporation 2002. All rights reserved.

Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract

with IBM Corp.

Be

©

About this manual

This manual contains diagnostic information, a Symptom-to-FRU index, service
information, and configuration information for the IBM
Unit.

Important safety information

sure to read all caution and danger statements in this book before performing

any of the instructions. See “Safety information” on page 37.

Lea todas as instruções de cuidado e perigo antes de executar qualquer operação.

®

EXP400 Storage Expansion

Prenez connaissance de toutes les consignes de type Attention et Danger avant de
procéder aux opérations décrites par les instructions.

Lesen Sie alle Sicherheitshinweise, bevor Sie eine Anweisung ausführen.

Copyright IBM Corp. 2002

iii

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Online support

Accertarsi di leggere tutti gli avvisi di attenzione e di pericolo prima di effettuare
qualsiasi operazione.

Lea atentamente todas las declaraciones de precaución y peligro ante de llevar a
cabo cualquier operación.

You can download the most current diagnostic, H8 flash, and device driver files
from http://www.ibm.com/pc/support on the World Wide Web.

Support telephone numbers

View support telephone numbers at http://www.ibm.com/planetwide/ on the World
Wide Web.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

©

Contents

About this manual . . . . . . . . . . . . . . . . . . . . . . . iii

Important safety information . . . . . . . . . . . . . . . . . . . . iii

Online support . . . . . . . . . . . . . . . . . . . . . . . . .iv

Support telephone numbers . . . . . . . . . . . . . . . . . . . .iv

Chapter 1. General information . . . . . . . . . . . . . . . . . . .1

Related publications . . . . . . . . . . . . . . . . . . . . . . .1

Notices and statements used in this publication . . . . . . . . . . . . .2

Features and operating specifications . . . . . . . . . . . . . . . . .2

Major components of the expansion unit . . . . . . . . . . . . . . . .4

What your expansion unit offers . . . . . . . . . . . . . . . . . . .4

Expansion unit bays . . . . . . . . . . . . . . . . . . . . . . .6

Hot-swap hard disk drive bays . . . . . . . . . . . . . . . . . . .6

Bridge card bay . . . . . . . . . . . . . . . . . . . . . . . .6

Hot-swap ESM and power supply bays . . . . . . . . . . . . . . .7

Expansion unit controls, LEDs, components, connectors . . . . . . . . . .7

Front view . . . . . . . . . . . . . . . . . . . . . . . . . .7

Rear view: ac power supply with fan units . . . . . . . . . . . . . .9

Rear view: ESMs . . . . . . . . . . . . . . . . . . . . . . .10

Power features . . . . . . . . . . . . . . . . . . . . . . . . .11

Turning on the expansion unit . . . . . . . . . . . . . . . . . .11

Turning off the expansion unit . . . . . . . . . . . . . . . . . .11

Turning off the expansion unit in an emergency . . . . . . . . . . . .12

Turning on the expansion unit after an emergency . . . . . . . . . . .12

System-management software support . . . . . . . . . . . . . . . .13

Chapter 2. ESM configuration switches . . . . . . . . . . . . . . .15

Chapter 3. Information for the -48 volt dc power model . . . . . . . . .19

Connecting the power supply to a power-distribution unit . . . . . . . . .20

Disconnecting and removing the dc power supply . . . . . . . . . . . .21

Installing the dc power supply . . . . . . . . . . . . . . . . . . .22

Chapter 4. Installing and replacing components . . . . . . . . . . .23

Installation guidelines . . . . . . . . . . . . . . . . . . . . . .23

System reliability guidelines . . . . . . . . . . . . . . . . . . .23

Handling static-sensitive devices . . . . . . . . . . . . . . . . .23

Working with hot-swap hard disk drives . . . . . . . . . . . . . . . .24

Replacing a hot-swap hard disk drive . . . . . . . . . . . . . . . .25

Replacing a bridge card . . . . . . . . . . . . . . . . . . . . .26

Replacing an ESM . . . . . . . . . . . . . . . . . . . . . . .27

Replacing a hot-swap power supply with fan unit . . . . . . . . . . . .28

Chapter 5. Symptom-to-FRU index . . . . . . . . . . . . . . . . .31

Chapter 6. Parts listing . . . . . . . . . . . . . . . . . . . . .33

Appendix A. Getting help and technical assistance . . . . . . . . . .35

Before you call . . . . . . . . . . . . . . . . . . . . . . . . .35

Using the documentation . . . . . . . . . . . . . . . . . . . . .35

Getting help and information from the World Wide Web . . . . . . . . . .35

Software service and support . . . . . . . . . . . . . . . . . . .36

Hardware service and support . . . . . . . . . . . . . . . . . . .36

Copyright IBM Corp. 2002

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Appendix B. Related service information . . . . . . . . . . . . . .37

Safety information . . . . . . . . . . . . . . . . . . . . . . . .37

General safety . . . . . . . . . . . . . . . . . . . . . . . .37

Electrical safety . . . . . . . . . . . . . . . . . . . . . . . .38

Safety inspection guide . . . . . . . . . . . . . . . . . . . . .39

Handling electrostatic discharge-sensitive devices . . . . . . . . . . .40

Grounding requirements . . . . . . . . . . . . . . . . . . . .41

Safety notices (multi-lingual translations) . . . . . . . . . . . . . .41

Appendix C. Notices . . . . . . . . . . . . . . . . . . . . . .79

Edition notice . . . . . . . . . . . . . . . . . . . . . . . . .79

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . .80

Important notes . . . . . . . . . . . . . . . . . . . . . . . . .80

Product recycling and disposal . . . . . . . . . . . . . . . . . . .81

Electronic emission notices . . . . . . . . . . . . . . . . . . . .81

Federal Communications Commission (FCC) statement . . . . . . . . .81

Industry Canada Class A emission compliance statement . . . . . . . .81

Australia and New Zealand Class A statement . . . . . . . . . . . .82

United Kingdom telecommunications safety requirement . . . . . . . . .82

European Union EMC Directive conformance statement . . . . . . . . .82

Taiwanese Class A warning statement . . . . . . . . . . . . . . .82

Chinese Class A warning statement . . . . . . . . . . . . . . . .82

Japanese Voluntary Control Council for Interference (VCCI) statement . . .83

Power cords . . . . . . . . . . . . . . . . . . . . . . . . . .83

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

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Chapter 1. General information

The IBM EXP400 Storage Expansion Unit, referred to in this manual as expansion
unit, provides high-capacity, small computer system interface (SCSI) disk storage. It
supports up to seven Ultra320 SCSI hard disk drives on each half of the dual bus. It
delivers fast, high-volume data transfer, retrieval, and storage functions across
multiple drives, to multiple hosts. The expansion unit is designed for continuous,
reliable service; the modular, redundant disk drives, power supply with fan units,
and SCSI Bus Expander and Enclosure Services Module (referred to in this book as
ESM) use hot-swap technology for easy replacement without turning off the
expansion unit. For more information, see “What your expansion unit offers” on
page 4.

Expansion unit models 1RU and 1RX come with two 500-watt ac power supply with
fan units, one ESM (the second ESM is optional), a filler panel to cover the empty
ESM bay, and 14 drive filler panels. Expansion unit model 2RX comes with two -48
volt dc power supply with fan units, two ESMs, and 14 drive filler panels. The drive
filler panels are replaced with hard disk drive options.

Related publications

This Hardware Maintenance Manual and Troubleshooting Guide is in Portable
Document Format (PDF) on the IBM Support Web site,
http://www.ibm.com/pc/support/. It contains information to help you solve problems
yourself, and it contains information for service technicians.

Installation Guide

This printed publication contains instructions for setting up your expansion unit
and basic instructions for installing some options.

User’s Guide

This publication provides general information about your expansion unit, including
information about features and how to configure and use your expansion unit.

Safety Information

This publication is in PDF on the IBM Documentation CD. It contains translated
caution and danger statements. Each caution and danger statement that appears

the documentation has a number that you can use to locate the corresponding

statement in your language in the Safety Information book.

Rack Installation Instructions

This printed publication contains instructions for installing your expansion unit in

rack.

Copyright IBM Corp. 2002

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Rack-to-Tower Conversion Kit Installation Instructions

This printed publication comes with the Rack-to-Tower Conversion kit and
contains detailed instructions for converting a rack-model expansion unit to a
tower-model expansion unit.

expansion unit documentation might be updated occasionally to include

Your
information about new features, a translated version of the documentation might be
available in your language, or technical updates might be available to provide
additional information that is not included in your expansion unit documentation.
These updates are available from the IBM Web site. Complete the following steps

check for updated documentation and technical updates:

http://www.ibm.com/pc/support/.

the Learn section, click Online publications.

the “Online publications” page, in the Brand field, select Servers.

the Family field, select Rack/Storage Enclosures.

Click Display documents.

Notices and statements used in this publication

The caution and danger statements that appear in this publication are also in the
multilingual Safety Information publication, which is on the IBM Documentation CD.
Each statement is numbered for reference to the corresponding statement in the

Safety Information publication.

The following notices and statements are used in this publication:

Notes: These notices provide important tips, guidance, or advice.
Important: These notices provide information or advice that might help you avoid

inconvenient or problem situations.

Attention: These notices indicate potential damage to programs, devices, or

data. An attention notice is placed just before the instruction or situation in which
damage could occur.

Caution: These statements indicate situations that can be potentially hazardous

you. A caution statement is placed just before the description of a potentially

hazardous procedure step or situation.

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.

Features and operating specifications

Table 1 on page 3 contains a summary of the features and operating specifications
for your expansion unit. Depending on your expansion unit model, some features
might not be available, or some specifications might not apply.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

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Table 1. Features and operating specifications

General:

Modular components

High-capacity disk drives
SCSI Bus Expander and

Enclosure Services Module

Acoustical noise emissions:

For open bay (no drives installed)
and maximum system configurations
(14 hard disk drives installed).

Sound power (idling):

(ESM)
Power supplies with built-in fan

units

Technology

v

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Sound power (operating):

Supports disk array technology
Supports clustering

Sound pressure (idling):

v

SCSI (Ultra320) host interface,
redundant data storage, power
and cooling system, and ESMs

Hot-swap technology for hard

Sound pressure (operating):

v

disk drives, power supply with
fan units, and ESMs

User interface

v

Built-in power, activity, and fault
indicators, identification labeling

CRUs, rear indicator lights,

switches, and connectors
Easy-to-replace drives, power

supplies with built-in fan units,
and ESMs

Hard

disk drive storage:

AC

Expansion unit model 1RU or 1RX
comes with two hot-swap 500 watt
(115 - 230 V ac) power supply
with fan units.

The two power supplies provide
redundant power to the expansion
unit.

-48

Current capabilities:

Maximum hard disk drives per
expansion unit: 14

Hard disk drives per SCSI bus
segment: 7

SCSI buses per unit: 2
SCSI buses can be configured

one continuous SCSI bus.

ESMs:

Technology and interfaces:

SCSI: Ultra320
SCSI bus interface: Two 68-pin,

Very High Density Connector

the expansion unit draws
approximately 5 amperes.

Size:

Height: 12.8 cm (5.0 in.)
Depth: 54.0 cm (21.8 in.)
Width: 44.7 cm (17.6 in.)
Weight: approximately 24.3 kg

(53.6 lb) for a standard unit. When
fully configured 37.3 kg (82 lb)

Environment:

Air temperature:

Interface (VHDCI) connectors for
SCSI bus cables

5.5 bels (open bay)

5.7 bels (typical)

6.0 bels (open bay)

6.5 bels (typical)

dBA (open bay)
dBA (typical)

dBA (open bay)
dBA (typical)

power supply with built-in fan:

volt dc power supply:

nominal voltage of -48 volt dc,

Expansion unit on: 10° to 40°C
(50.0° to 104°F); altitude: 30.5
(100 ft) below to 3000 m (9840
ft) above sea level;
temperature change: 10°C to
(18°F) per hour
Expansion unit off: 10° to 50°C
(14.0° to 120.0°F); maximum
altitude: 3000 m (9840 ft);
temperature change: 15°C
(27.0°F) per hour

Environment cont.

Humidity:

Expansion unit on: 20% to 80%
Expansion unit off: 10% to 90%
Maximum dew point: 26°C (79°F)
Maximum humidity gradient: 10%
per hour

Heat

output:

Approximate heat output in British
thermal units (Btu) per hour:

Minimum configuration: 82.4 Btu
(282 watts)
Maximum configuration: 91.0 Btu
(311 watts)

Electrical

input:

Sine-wave input (50-60 Hz) required
Input voltage low range:

Minimum: 90 V ac
Maximum: 136 V ac

v

Input voltage high range:

Minimum: 198 V ac
Maximum: 264 V ac

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Input kilovolt-amperes (kVA),
approximately:

Minimum: 0.06 kVA
Maximum: 0.45 kVA

Notes:

Power consumption and heat
output vary depending on the
number and type of optional
features installed and the
power-management optional
features in use.

These levels were measured in
controlled acoustical environments
according to the procedures
specified by the American National
Standards Institute (ANSI) S12.10
and ISO 7779 and are reported in
accordance with ISO 9296. Actual
sound-pressure levels in a given
location might exceed the average
values stated because of room
reflections and other nearby noise
sources. The declared sound-power
levels indicate an upper limit, below
which a large number of computers
will operate.

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Major components of the expansion unit

The orange color on components and labels in the expansion unit indicates
hot-swap or hot-plug components. You can install or remove these components
while the expansion unit is running. For information about installing hot-swap and
hot-plug components, see Chapter 4, “Installing and replacing components,” on
page 23.

The blue color on components and labels indicates touch points, where a
component can be gripped, a latch moved, and so on.

The following illustration shows the locations of major components in your
expansion unit.

Note: The illustrations in this publication might differ slightly from your hardware.

Hot-swap ESMs

Hot-swap power supply with fan units

Hard disk drives

What your expansion unit offers

The expansion unit provides several features for easy operation, including:

Customer replaceable units (CRUs)

The CRUs in your expansion unit are: Ultra320 hard disk drives, ESMs, and
power supply with fan units.

Fault indicators

All CRUs have fault or status light emitting diodes (LEDs) to indicate hardware
failures.

Switch selectable Box ID and user configuration settings

The ESM contains five sets of configuration switches that you can set according

your configuration. For detailed information about these switches and their

settings, see Chapter 2, “ESM configuration switches,” on page 15.

Redundant cooling and power capabilities

v

Expansion unit models 1RU and 1RX use a dual ac input power system. This
means both power switches must be turned on for proper redundant operation.
The redundant cooling of the fans in your expansion unit enables continued
operation if one fan fails. Your expansion unit comes with two 500-watt hot-swap
power supply with fan units, which provide redundant power for many expansion

Filler panel

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

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unit configurations. If the average load on your expansion unit is less than 500
watts and a problem occurs with one of the power supplies, the other power
supply can meet the power requirements.

Expansion unit model 2RX uses a dual dc input power system. For detailed
information about working with the dual dc input power system, see Chapter 3,
“Information for the -48 volt dc power model,” on page 19.

ServeRAID

™

support

Your expansion unit supports servers with ServeRAID adapters to create
redundant array of independent disks (RAID) configurations.

Clustering support

Twin-tailed clustering support is a feature of the expansion unit. Clustering is a
way to share SCSI buses and hard disk drives between two SCSI controllers to
provide redundancy of SCSI controllers and servers. This redundancy is
important if one of the controlling servers fails. If a hardware component fails
after clustering is set up, another server will take ownership of the hard disk
drives.

With twin-tailed clustering, you can connect two IBM ServeRAID controllers to an
expansion unit. In the twin-tailed clustering environment, you can use dual-host
controllers cabled separately to the expansion unit; however, only a single bus of

drives is supported. Each SCSI device on a SCSI bus must have a unique ID.

Service tip: If you use IBM ServeRAID controllers in a cluster configuration, the

termination-power LED on the back of the expansion unit is useful. The
ServeRAID controller provides the signal for termination power. If the termination
power LED is not lit, it indicates that a particular expansion unit is not attached to

controller that is turned on. Make a note of which expansion unit is attached to

which server before the hardware is serviced.
Clustering requires additional hardware and specialized software. For more

information, go to http://www.ibm.com/pc/ww/eserver/xseries/clustering/.

Chapter 1. General information

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Expansion unit bays

The following sections describe the hot-swap components of the expansion unit and
the bridge card bay.

With the hot-swap features of the expansion unit, you can remove and replace a
hard disk drive, power supply with fan unit, and ESM without turning off the
expansion unit. You can maintain the availability of your expansion unit while a
hot-swap component is removed, installed, or replaced.

Hot-swap hard disk drive bays

The following illustration shows the location of the hot-swap hard disk drive bays
that are accessible from the front of your expansion unit. The expansion unit
supports up to 14 IBM Ultra320 SCSI hard disk drives. These drives come
preassembled in a drive tray. You install the hard disk drives in the 14 drive bays on
the front of the expansion unit.

the following illustration, seven of the 14 hard disk drive bays contain hard disk

drives, and seven bays contain filler panels. To maintain proper cooling within your
expansion unit, always keep a filler panel in each drive bay that does not contain a
hard disk drive. For information about installing and replacing drives, see “Working
with hot-swap hard disk drives” on page 24.

Bridge card bay

Hot-swap drive bays

Filler panel

Bridge card bay

Attention: Never hot-swap a hard disk drive when its green activity LED is

flashing. Hot-swap a hard disk drive only when its amber status LED is lit (not
flashing) or when the drive is inactive with the green activity LED off (not flashing).
Use the ServeRAID system-management software to set the hard disk drive state to
“defunct” and then you can hot-swap it.

The following illustration shows the location of the bridge card bay. This bay is
accessible from the front of the expansion unit. You can replace the bridge card, but
you must turn off the expansion unit before doing so. For more information about
replacing a bridge card, see “Replacing a bridge card” on page 26.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

Bridge card bay

of

Hot-swap ESM and power supply bays

The following illustration shows the location of the hot-swap ESM bays (for the
hot-swap ESMs) and the power supply bays (for the hot-swap power supply with
fan units).

Hot-swap ESMs

Hot-swap power supply with fan units

Hot-swap ESM bays

The expansion unit comes with two ESM bays for the hot-swap ESMs.
ESMs provide a SCSI interface to the hard disk drives and monitor the
overall status of the expansion unit. An ESM has five sets of switches for
user configuration. For more information about replacing an ESM, see
“Replacing an ESM” on page 27. For more information about ESM
switches, see Chapter 2, “ESM configuration switches,” on page 15.

Hot-swap power supply with fan unit bays

Expansion unit models 1RU and 1RX come with two 500 watt hot-swap and
redundant power supply with fan units. The power supplies are redundant in
that a single power supply can provide adequate power and cooling for the
entire expansion unit. A single power supply can support up to 14 hard disk
drives; however, both power supplies must be installed, even if one power
supply is not operational. For more information about working with hot-swap
power supplies, see “Replacing a hot-swap power supply with fan unit” on
page 28.

Expansion unit model 2RX comes with two -48 volt dc power supply with
fan units. For information about installing or replacing the -48 volt power
supplies, see Chapter 3, “Information for the -48 volt dc power model,” on
page 19.

Expansion unit controls, LEDs, components, connectors

The primary controls of the expansion unit are located on the front of the unit. The
user controls of the expansion unit are located on the back of the unit. Two
hot-swap power supply with fan units and two ESMs are accessible from the back

the expansion unit. These components contain several user indicators and

connectors.

Front view

The primary controls on the front of the expansion unit are shown in the following
illustration and are described in this section.

Chapter 1. General information

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General-system-

error LED (amber)

Power-on LED (green)

Hard disk
drive

Box identity LED
(blue)

Bridge

card bay

Filler panel

Hard disk

activity

drive
LED (green)

Hard disk

status

drive

LED (amber)

Tr ay

handle

Latch

Power-on LED (green)

This green LED is lit when the power supply is turned on and is supplying
both 5 volt and 12 volt dc power to the expansion unit.

General-system-error LED (amber)

When lit, this amber LED indicates that the unit has a fault, such as in a
power supply, ESM, or hard disk drive.

Box identity (blue)

The box identity LED is used to identify the expansion unit. When this blue
LED is lit, the system-management software on the server connected to the
expansion unit has identified this expansion unit.

Bridge card bay

The bridge card is located in the center of the front panel between bay 7
and bay 8.

Filler panel

Expansion units come with drive filler panels in the unused drive bays.
Before installing new hard disk drives, you must remove the filler panels
and save them for later use. Each of the 14 bays must contain either a filler
panel or a hard disk drive.

Drive bays

Drive bays

There are 14 drive bays that contain either a hard disk drive or a filler
panel.

Latch This multipurpose blue latch releases or locks the hard disk drive in place.
Tray handle

You can use this multipurpose handle to insert or remove a hard disk drive.

Status LED (amber)

Each hard disk drive has a status LED. When lit continuously, this amber
LED indicates a drive failure. When flashing, this amber LED indicates that

drive Identify or Rebuild is in progress.

Activity LED (green)

Each hard disk drive has an activity LED. When flashing, this green LED
indicates drive activity.

Hard disk drive

You can install up to 14 hot-swap hard disk drives in the expansion unit.
Each drive contains an Ultra320 hard disk drive and tray.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

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AC

Rear view: ac power supply with fan units

Two hot-swap power supply with fan units are accessible from the back of the
expansion unit. These components at the back of the expansion unit contain
several user controls, LEDs, and connectors as shown in the following illustration.

Thumbscrews Thumbscrews

Handle Handle

AC power LED (green)

DC power LED (green)

Fault LED (amber)

Power
on/off
switch

supply/Fan CRU

Power

Thumbscrews

Loosen the thumbscrews to remove or install a power supply with fan unit.

power connector

The power cord for the power supply with fan unit connects here.

Power supply with fan unit

The two hot-swap power supply with fan units are located on the back of
the expansion unit.

Attention: The expansion unit comes with two power supply with fan

units installed. When one power supply fails, the power-supply unit must be
replaced to reestablish redundancy. When replacing the failed unit with the
new power supply unit, ensure that this operation is performed in less than

minutes to prevent overheating.

The fan that is visible from the rear of the power supply is an auxiliary fan
that is normally off. This fan turns on only when the main fan within the
power supply fails.

Power on/off switch

Use this switch to turn the power supply on and off.

Power

on/off

switch

supply/Fan CRU

AC power connectorAC power connector

Power

Fault LED (amber)

power LED (green)

power LED (green)

Handles

When lit continuously, this amber fault LED indicates a power supply failure

that a redundant power supply is not turned on. This LED also flashes

when the built-in fan fails.

This green LED is lit when the expansion unit is turned on and is supplying
both 5 volt and 12 volt dc power to the expansion unit.

This green LED is lit when the power supply is receiving ac power.

The two handles are used for installing and removing the power supply with
fan unit.

Chapter 1. General information

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Rear view: ESMs

The ESMs are accessible from the back of the expansion unit. These components
contains user controls, LEDs, switches, and connectors as shown in the following
illustration.

Note: The ESM on the right side is optional on expansion unit models 1RU and

1RX.

Termination-power

LED (green)

ESM

LVD/SE

LED (green)

SCSI Bus

connector 2

Activity LED

(green)

Termination-power

LED (green)

LED (green)

LVD/SE

SCSI Bus

connector 1

Thumbscrew

SCSI reset
LED (green)

Configuration switch (SW1)

Fault LED
(amber)

Box ID switch (SW2)

Fault LED
(amber)

ESM Each ESM contain SCSI controls, LEDs, and connectors.
Fault LED (amber)

When lit, this amber LED indicates an ESM failure.

SCSI reset LED

When lit, this green LED indicates a SCSI bus reset.

Thumbscrews

Each ESM has a thumbscrew on the left side of the module. Use the
thumbscrew and lever to remove and insert the ESM.

Activity LED

(green)

SCSI reset
LED (green)

Switch cover

ESM

Termination-power LED (green)

When lit, this green LED indicates that termination power is present. When

bus connector is connected to a powered-on controller. Each external bus
has a separate termination-power LED.

LVD/SE LED (green)

When lit, this green LED indicates that the external host bus is in low
voltage differential (LVD) mode. When this LED is off, it indicates that the
external host bus is in single-ended (SE) mode. Each external bus has a
separate LVD/SE LED. Only LVD host bus controllers are supported.

SCSI bus connector

The 68-pin Very High Density Connector Interface (VHDCI) connectors are
for connecting your SCSI cables to SCSI bus 1 and SCSI bus 2.

Activity LED (green)

When lit, this green LED indicates there is activity on the external SCSI
bus. Both external buses have a separate activity LED.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

termination-power LED is lit, it indicates that the other end of the SCSI

If

1.

a.

b.

c.

d.

on

3.

4.

Configuration switch SW1

Configuration switch SW1 is a 5-position switch that is mounted on the
ESM and is accessible from the rear of the expansion unit.

Box ID switch SW2

Box ID switch SW2 is a 10-position rotary switch that sets the expansion
unit ID using values 0 through 9. System-management software, such as
IBM Director or ServeRAID Manager, uses this ID when it provides data
and alerts for the expansion unit.

Power features

This section contains instructions for turning the expansion unit on and off under
normal and emergency circumstances.

Turning on the expansion unit

you are turning on the expansion unit after an emergency shutdown or power

outage, see “Turning on the expansion unit after an emergency” on page 12.

Complete the following steps to turn on the power for the initial startup of the
expansion unit.

Verify that:

All cables are properly attached.
Both power cords are plugged into the back of the expansion unit and into

properly grounded electrical outlets.

All hard disk drives are locked securely in place.

The configuration switches are set correctly. See Chapter 2, “ESM
configuration switches,” on page 15.

Check the system documentation for all the hardware devices you intend to turn

2.

and determine the proper power-on sequence.

Note: Be sure to turn on the expansion unit before or at the same time as you

turn on the server.

Turn on each device, based on the power-on sequence that is described in the
documentation that comes with the device.

Turn on both power supplies on the back of the expansion unit.
The expansion unit might take a few seconds to turn on. During this time, you

might see the fault (amber) and the power (green) LEDs on the expansion unit
turn on and off intermittently. When the power-on sequence is complete, only
the power (green) LEDs on the front and back should remain on. If one or more
fault (amber) LEDs remain lit, refer to Chapter 5, “Symptom-to-FRU index,” on
page 31.

Turning off the expansion unit

Attention: Except in an emergency situation, never turn off the power if any fault

LEDs are lit on the expansion unit. Correct the fault before you attempt to turn off
the power, using the proper troubleshooting or servicing procedure. This will ensure
that the expansion unit will turn on correctly later. See Chapter 5, “Symptom-to-FRU
index,” on page 31.

Statement 5:

Chapter 1. General information

11

v

v A

v A

1.

2.

3.

4.

1.

2.

3. If

4.

12

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

The expansion unit is designed to run continuously, 24 hours a day. Turn off the
power only when at least one of the following is true:

Instructions in a hardware or software procedure require you to turn off the
power.

service technician tells you to turn off the power.
power outage or emergency situation occurs. See “Turning off the expansion

unit in an emergency.”

Complete

the following steps to turn off the expansion unit:
Close all active operating system windows and programs.
Power down the server attached to the expansion unit.
Make sure that all amber status and fault LEDs are off. If any status or fault

LEDs are lit (on hard disk drives, power supplies, or ESMs), identify or correct
the problem before you turn off the power. For more information, see Chapter 5,
“Symptom-to-FRU index,” on page 31.

Turn off both power supplies.

Turning off the expansion unit in an emergency

Attention: Emergency situations might include fire, flood, extreme weather

conditions, or other hazardous circumstances. If a power outage or emergency
situation occurs, always turn off all power switches on all computing equipment.
This will help safeguard your equipment from potential damage due to electrical
surges when power is restored. If the expansion unit loses power unexpectedly, it
might be due to a hardware failure in the power system or midplane, see Chapter 5,
“Symptom-to-FRU index,” on page 31.

Complete the following steps to turn off the expansion unit during an emergency
situation:

Close all active operating system windows and programs.
Power down the server attached to the expansion unit.

you have time, stop all activity and check the LEDs (front and back). Make
note of any status or fault LEDs that are lit so that you can correct the problem
when you turn on the power again.

Turn off all expansion unit power supplies; then, unplug the power cables from
the expansion unit.

Turning on the expansion unit after an emergency

Complete the following steps to restart the expansion unit if you turned off the
power supplies during an emergency shutdown, or if a power failure or a power
outage occurred:

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

2.

on

3.

on

4.

5.

6.

7.

v

v

v

v

1.

After the emergency situation is over or power is restored, check the expansion
unit for damage. If there is no visible damage, continue with step 2; otherwise,
have your unit serviced.

After you check for damage, plug in the expansion-unit power cables and turn

the power switches.

Check the system documentation for the hardware devices you intend to turn
on, and determine the proper power-on sequence.

Note: Be sure to turn on the expansion unit before or at the same time you turn

the server.

Turn on each device, based on the power-on sequence that is described in the
documentation that comes with the device.

Turn on both power supplies on the back of the expansion unit.
Only the power (green) LEDs on the front and back should be on. If one or

more of the fault (amber) LEDs are on, see Chapter 5, “Symptom-to-FRU
index,” on page 31 for instructions.

Use your installed software application as appropriate to check the status of the
expansion unit.

System-management software support

The expansion unit provides software alert functions through the system monitor
functions provided in the IBM Director and IBM ServeRAID software.

The following alerts are supported:

Hard disk drive disabled
Power supply failure
Fan failure
Expansion unit exceeds normal operating temperature

must use IBM ServeRAID version 6.10.25 or later for your ServeRAID

You
controller to report status and alerts properly. To download the latest ServeRAID
software, go to http://www.ibm.com/pc/support/.

For up-to-date information about IBM Director software support available for your
expansion unit, go to
http://www.ibm.com/pc/ww/eserver/xseries/systems_management/index.html.

Chapter 1. General information

13

14

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

An

1

2

On 3

On 4

©

Chapter 2. ESM configuration switches

This chapter provides general information about ESM functionality as it relates to
ESM configuration switch settings. The ESM configuration switches control how
power is supplied to the expansion unit and what expansion unit services are
enabled (for example, switching between a rack configuration and a tower
configuration or switching between a single bus and a dual-bus configuration.) In a
dual-bus configuration, each bus uses seven drives. A single-bus configuration uses
all 14 drives.

ESM contains five sets of configuration switches, shown in the following

illustration.

SW5 SW3 SW4

Box-ID switch

(SW2)

SW1

Note: If both ESMs are installed, the ESM on the left must have valid switch

settings. The switch settings on the ESM that is installed in the right bay are
ignored. If only one ESM is installed, it must be in the left bay.

Configuration switches are summarized in Table 2 and described in this section.

Table 2. Factory default configuration switch settings

Factory default

Switch location

Configuration switch
SW1

Position Description

Reserved

Reserved
Reserved
Reserved

switch setting

Off

Off

Copyright IBM Corp. 2002

15

5

On

0

1

2

3

4

1

2

3

4

1

2

3

4

v

v

on

16

Table 2. Factory default configuration switch settings (continued)

Factory default

Switch location

Position Description

switch setting

Remote power control disable
Box ID switch SW2
Configuration switch

Rotary Expansion unit ID

SCSI ID configuration 1

Off

SW3

Configuration switch

SCSI ID configuration 2

SCSI ID configuration 3

Reserved

SCSI-bus split control

Off
Off
Off
Off

SW4

Configuration switch

Rack and tower LED

Reserved

Reserved

Reserved

Off
Off
Off
Off

SW5

Reserved

Reserved

Reserved

Off
Off
Off

Configuration switch SW1 settings

Configuration switch SW1 is a five-position switch that is mounted on the
ESM and is accessible from the rear of the expansion unit. The five switch
positions are set as follows:

Switch positions 1 through 4 - Reserved
Switch position 5 - Remote power control disable
When switch position 5 is set to Off, the ESM will enable the power

supplies when the termination power (TERMPWR) is active in any
external SCSI port. This means that the expansion unit will be powered

and off automatically when the host server is powered on and off or
when TERMPWR is disabled. When switch position 5 is set to On (the
default setting), power on and off is not controlled by the TERMPWR
signal, but by the power on/off switches on the power supplies.

Box ID switch SW2

Box ID switch SW2 is a 10-position rotary switch that sets the expansion
unit ID using values 0 through 9. System-management software, such as
IBM Director or IBM ServeRAID Manager, uses this ID when it provides
data and alerts for the expansion unit.

Configuration switch SW3 — SCSI ID configuration switch

Configuration switch SW3 defines the SCSI bus ID configurations. The user
should prevent a SCSI ID conflict in a specific bus mode. SCSI bus mode is
controlled by configuration switch SW4.

There are two SCSI buses (bus 1 and bus 2) in the expansion unit. Each
bus uses seven SCSI ID numbers. Each hard disk drive within the
expansion unit has a unique SCSI bus and ID assignment, based on its
physical location in the expansion unit and the setting of configuration
switch SW3. This prevents a SCSI ID conflict in a specific bus mode.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

2,

2, 3, 4, 5, 6, 8, 9,

v

v

v

v

SW

1 2 3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

3 4 5 6 8 9 10 11 12 13 14 On On On

8 6 5 4 3 2 1 0

as a

v

v

a

v

The switch positions configure the SCSI ID assignment. Switch positions 1,

and 3 are set to Off for rack enclosures. Rack enclosure SCSI IDs are
identified from left to right. The SCSI addresses are 0, 1, 2, 3, 4, 5, 6, 8, 9,
10, 11, 12, 13, 14.

Switch positions 1, 2, and 3 are set to On for a tower enclosures. The
enclosure unit is rotated counter-clockwise 90 degrees to be converted to a
tower unit. In this case, the SCSI addresses are reversed and they are 0, 1,

10, 11, 12, 13, 14 from top to bottom. All other switch
settings are reserved. Numbered stickers for the front of the drives are
provided so you can label the drives with the SCSI IDs.

Switch position 1 - SCSI ID configuration 1

This switch position (default is Off) is used to configure SCSI ID
assignment with a combination of SCSI ID switch positions 2 and 3.

Switch position 2 - SCSI ID configuration 2

This switch position (default is Off) is used to configure SCSI ID
assignment with a combination of SCSI ID switch positions 1 and 3.

Switch position 3 - SCSI ID configuration 3

This switch position (default is Off) is used to configure SCSI ID
assignment with a combination of SCSI ID switch positions 1 and 2.

Switch position 4 - Reserved

This switch position is reserved and set to Off (the default).

Table 3. SCSI ID configuration matrix

position Bus

Config

L-segment

Slot

Slot

Off Off Off Rack 0 1 2

Tower 14 13 12 11 10 9

Configuration switch SW4

Configuration switch SW4 controls the SCSI bus configuration. When switch
position 1 is set to Off (default is Off), the expansion unit configuration is set

expansion unit configuration is set as a dual SCSI bus (split bus) mode.

Switch position 1 - SCSI-bus split control

This switch position controls the SCSI bus mode. When the switch
position is set to Off (default is Off), the expansion unit is configured as a
single SCSI bus. When this switch position is set to On, the expansion
unit is configured as a dual or split SCSI bus.

Switch position 2 - Rack-to-tower LED mode

Set switch position 2 to Off (default is Off) for rack enclosures and to On
for tower enclosures. These settings control the power and fault LEDs on
the midplane, which are exchanged from one orientation to the other. In

side LED is green.

R-segment

Slot

Slot

Slot

Slot

Slot

Slot

Slot

Slot

Slot

Slot

Slot

single SCSI bus mode. When switch position 1 is set to On, the

tower enclosure, the top LED is green and in a rack enclosure, the left

Slot

Note: If you are installing the expansion unit in a tower enclosure, see

the Rack-to-Tower Conversion Kit Installation Instructions for
configuration switch settings and labeling information.

Switch position 3 - Reserved

This switch position is reserved and set to Off (the default).

Chapter 2. ESM configuration switches

17

18

v

Switch position 4 - Reserved

This switch position is reserved and set to Off (the default).

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

on

dc

DC

dc

DC

©

Chapter 3. Information for the -48 volt dc power model

Attention: Only a trained service technician may connect or disconnect the -48

volt dc power supply from its power source, install or remove the power connection

the rear of the expansion unit, and remove or install the power supply in the

expansion unit.

Important: To be compliant with EN55024:1998, the power cables for this -48 volt

product must not exit the building in which the equipment is installed.

This chapter provides instructions for connecting the power supply to a
power-distribution unit and for replacing the power supply in the expansion unit.
Read this chapter completely before making the power connections.

The following illustration shows the major components of the -48 volt dc power
supply.

Handles

Captive screw

Power on/off
switch

0

9

1

8

2

7

3

6

4

5

DC input
LED

DC power
LED

Chk LED

Input connector

Captive screw

Handle: Use the two handles for installing and removing the power supply.

Captive screws: Use these screws to secure the power supply to the expansion

unit.

Power on/off switch: Press this switch to turn the power supply on and off.

input LED: When this LED is lit, it indicates that the power supply is receiving

power from the external power-distribution unit.

power LED: When this LED is lit, it indicates that the power supply is supplying

power to the expansion unit.

Chk LED: When this LED is lit, it indicates that the power supply has failed or the

power switch is turned off. When this LED is flashing, the fan has failed.

Input connector: Connect the dc cable to this connector.

Copyright IBM Corp. 2002

19

1

7

2

8

3

9

4

10

5

11

6

12

1.

2.

3.

4.

20

The input connector is a 12-position connector at the lower-right side of the power
supply. The following illustration shows the pin-number assignments as viewed from
the wiring side.

Pin 6

Pin 1

Pin 12

Pin 7

The pin assignments are shown in the following table. For cable connection
instructions, see “Connecting the power supply to a power-distribution unit.”

Table 4. Input connector pin assignments

Pin

Assignment

Pin

Frame ground
Not used

-48 V return (0 V)

-48 V return (0 V)

-48 V in

-48 V in

Connecting the power supply to a power-distribution unit

The following instructions are an overview of the procedure for connecting the
power supply to a power-distribution unit. For specific information about connecting
the power cable to a power-distribution unit, see the installation instructions that
come with the power-distribution unit.

Complete the following steps to connect the power supply to a power-distribution
unit:

Review the safety information beginning on page 37.
Connect the dc cable to the input connector on the power supply. Make sure

that the dc cable is fully seated in the connector and locks into place.

Assignment

Frame ground
Not used

-48 V return (0 V)

-48 V return (0 V)

-48 V in

-48 V in

Open the terminal-block cover on the power-distribution unit.
Connect the wires on the dc cable to the power-distribution unit.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide

0

9

1

8

2

7

3

6

4

5

DC cable

a.

b.

c.

6.

to dc

1.

on

2.

on

3.

4.

5.

Attention: You must connect the wires in the order described to ensure

proper operation of the power supply. The wires are color-coded.

Frame ground

Return (0 V)

-48 V

Connect the frame ground (green and yellow) to the main ground terminal
(also known as earth ground) in the terminal block.

Connect the 0 V wire (blue) to the return terminal on the terminal block.

Connect the -48 V wire (brown) to the -48 V terminal on the terminal block.

Close the terminal-block cover.

5.
Turn on the power supply. Check the LEDs for proper operation of the power

supply.

Disconnecting and removing the dc power supply

Statement 19:

CAUTION:
The power-control button on the device does not turn off the electrical current
supplied to the device. The device also might have more than one connection

power. To remove all electrical current from the device, ensure that all

connections to dc power are disconnected at the dc power input terminals.

OFF

Complete the following steps to disconnect the dc power connection and remove
the power supply from the expansion unit:

See the operating-system documentation and “Turning off the expansion unit”

page 11 for the proper procedure to shut down the system.

When the expansion unit is ready for shutdown, press the power on/off switch

the power supply.

Turn off the power from the power-distribution unit. See the documentation that
comes with the power-distribution unit.

Note: If you need to disconnect the cables from the power-distribution unit, see

Remove the dc cable from the input connector on the power supply.
Loosen the captive screws on the power supply and remove the power supply

from the bay of the expansion unit.

the documentation that comes with the power-distribution unit.

Chapter 3. Information for the -48 volt dc power model

21

1.

2.

3.

4.

5.

22

Installing the dc power supply

Attention: Do not use the power supply with an ac input power supply in the

same expansion unit.

Complete the following steps to install the power supply:

Review the safety information beginning on page 37.
Make sure that the power supply is turned off.
Insert the power supply into the open bay until it is fully seated in the expansion

unit.

Handle

Captive screw

0

9

1

8

2

7

3

6

4

5

Captive screw

Tighten the two captive screws by turning them clockwise.
For instructions about how to connect the power supply to a power-distribution

unit, see “Connecting the power supply to a power-distribution unit” on page 20.

IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide