Bull DPX/20 Assembly Instructions

014-002518-03
Bull DPX/20
Installing and Maintaining a
150 Disk-Array Storage System
86 A1 12GX 01
ORDER REFERENCE

Bull DPX/20
Installing and Maintaining a
150 Disk-Array Storage System
Hardware
June 1996
Bull Electronics Angers S.A.
CEDOC
Atelier de Reprographie
331 Avenue Patton
49004 ANGERS CEDEX 01
FRANCE
86 A1 12GX 01
ORDER REFERENCE

The following copyright notice protects this book under the Copyright laws of the United States and other
countries which prohibit such actions as, but not limited to, copying, distributing, modifying, and making
derivative works.
Copyright Bull S.A. 1995, 1996
Printed in France
Suggestions and criticisms concerning the form, content, and presentation of
this book are invited. A form is provided at the end of this book for this purpose.
Trademarks and Acknowledgements
We acknowledge the right of proprietors of trademarks mentioned in this book.
ArrayGUIde and GuardWare are trademarks and CLARiiON is a U.S. registered trademark of
Data General Corporation.
AIXRis a registered trademark of International Business Machines Corporation, and is being used under
licence.
UNIX is a registered trademark in the USA and other countries licensed exclusively through X/Open.
This book is derived from the book “Installing and Maintaining a CLARiiONRSeries 100 Disk-Array Storage
System”, Data General Corporation.
The information in this document is subject to change without notice. Groupe Bull will not be liable for errors
contained herein, or for incidental or consequential damages in connection with the use of this material.

Preface iii
Preface
This manual explains how to install the DAS 150 disk-array storage system and how to
replace and/or install customer-replaceable units (CRUs).
It is for technical services personnel who want to install and maintain the storage system. It
assumes familiarity with the computer, called the server, to which the storage system will be
connected.
How this manual is organized
Chapter 1 Introduces the storage system’s components and its connection to the server.
Chapter 2 Describes how to connect a single storage system to the server’s SCSI-2 bus.
Chapter 3 Describes how to connect multiple storage systems to the server(s).
Chapter 4 Describes how to replace or add disk modules and how to replace the other customer-re-
placeable units (CRUs).
Appendix A Lists the technical specifications of the storage system.
Appendix B Lists the available spare parts with their part number.
Related manuals
Within this manual, we refer to the documentation for configuring and managing the
storage system, and for setting up the server for a storage system. See the manual
Configuring and Managing a DAS Disk-Array Storage System (Order Number
86 A2 20 PN).
We also refer to the ArrayGUIde documentation. See the manual Using the ArrayGUIde
Utility to Configure and Manage a DAS Disk-Array Storage System (Order Number
86 A2 13 GX).
Ordering additional copies of this manual
To order additional copies of this manual, use Order Number 86 A1 12 GX.

iv Installing and Maintaining a DAS 150

Preface v
Contents
About the storage system 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage-system components 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI-2 adapter 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage-control processor (SP) 1–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Write-cache memory card 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disk-drive modules 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power converters (VSCs) 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan modules 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connection to the server 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic configuration 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual-initiator configuration 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Factory configuration 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What next 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a single storage system on a SCSI bus 2–1. . . . . . . . . . . . . . . . . . . . . . . .
Attaching the slot matrix diagram 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SP’s SCSI-2 bus connectors 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the SCSI-bus cable for the storage system 2–2. . . . . . . . .
Setting the SCSI ID for the SP 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the asynchronous (console) cable 2–5. . . . . . . . . . . . . . . .
Connecting the ac power cord 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powering up the storage system 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
What next 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing multiple storage systems on a SCSI bus 3–1. . . . . . . . . . . . . . . . . . . . . . .
Attaching the slot matrix diagram 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI-2 bus length 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SP’s SCSI-2 bus connectors 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting SCSI-bus cables for multiple storage systems 3–2. . . . . .
Setting the SCSI ID for the SP 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the asynchronous (console) cable 3–6. . . . . . . . . . . . . . . .
Connecting the ac power cord 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powering up the storage system 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
What next 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Upgrading and repairing a storage system 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handling CRUs 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Avoiding electrostatic discharge (ESD) damage 4–2. . . . . . . . . . . .
Precautions when removing, installing, or storing CRUs 4–3. . . . .
Replacing or adding a disk module 4–4. . . . . . . . . . . . . . . . . . . . . . . . . .

vi Installing and Maintaining a DAS 150
Removing a disk module 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a disk module 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing or installing a disk filler module 4–7. . . . . . . . . . . . . . . . . . . .
Replacing the SP 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the SP 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the SP 4–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing or installing SP memory modules 4–10. . . . . . . . . . . . . . . . . .
Removing SP memory modules 4–11. . . . . . . . . . . . . . . . . . . . . . . . . .
Installing SP memory modules 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing or adding the write-cache memory card 4–13. . . . . . . . . . . . .
Removing the write-cache memory card 4–13. . . . . . . . . . . . . . . . . .
Installing the write-cache memory card 4–14. . . . . . . . . . . . . . . . . . .
Installing or replacing the write-cache memory card battery 4–15. . . .
Installing the battery 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the battery 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing a VSC 4–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing a fan module 4–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical specifications A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spare parts for DAS 150 B–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index X–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
Chapter 1. About the storage system
1About the storage system
This chapter introduces the DAS 150 disk-array storage system. It describes the
hardware components that make up the storage system and the different ways to
connect the storage system to a computer, called a server.
The DAS 150 storage system provides a compact, high-capacity, high-availability
source of disk storage for the server at a low cost. It offers large-capacity, traditional
or high-availability disk storage in as many as seven disk modules that you can
replace under power.
DAS 150 disk-array storage system
Storage-system components
The storage system consists of a SCSI-2 (small computer system interface 2) adapter
in the server and a storage-system chassis that contains compartments for these
modules:
One storage-control processor (SP), which has a slot for the write-cache memory
card and its battery
Three to seven disk-drive modules
Three fan modules
Two voltage semi-regulated converters (VSCs), which are power supplies

1–2 Installing and Maintaining a DAS 150
Only service personnel authorized to open the server cabinet should install or replace
SCSI-2 adapters. The SP, write-cache memory card and its battery, disk modules, fan
modules, and VSCs are customer-replaceable units (CRUs), which you can install or
replace yourself.
The following figure shows the location of the storage system’s CRUs, which also
include the customer-replaceable SCSI bus cables, SCSI terminator plug, power cord,
and the optional asynchronous (console) cable.
Location of the customer-replaceable units in the disk-array storage system
A0
B0
A1
B1
B2
A3
A2
Back viewFront view
7 Disk-drive
modules
Storage-control
processor (SP)
VSC A
VSC B
SCSI bus
cables
ac power cord
Asynchronous
cable (optional)
3 Fan
modules
System
power light
System
service light
Write-cache
memory card
SCSI-2 adapter
The SCSI-2 adapter (or controller) is a printed-circuit board that resides in an I/O slot
in the server cabinet. It connects to the SP in the storage-system cabinet by a SCSI-2
differential bus, and transfers data between the server’s memory and the SCSI-2 bus.
The SCSI-2 adapter is supplied by the server’s vendor.
Storage-control processor (SP)
Replace light
(amber)
Bezel
Printed-circuit
board
Memory
modules
SP SCSI ID
switch
SCSI bus
connectors
Console
connector
Latch
Write-cache
memory card slot
Card eject
button cover