HP FC60 User Manual

HP SureStore E Disk Array FC60

Advanced User’s Guide

This manual was downloaded from http://www.hp.com/support/fc60/

hpHH

Edition E1200

Printed in U.S.A.

Notice

Hewlett-Packard Company makes no warranty of any kind with regard to this docume nt, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. HewlettPackard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

This document contains proprietary information, which is protected by copyright. No part of this document may be photocopied, reproduced, or translated into another language without the prior written consent of Hewlett-Packard. The information contained in this document is subject to change without notice.

Trademark In formation

Microsoft, Windo ws , Windows NT , and Windows 2000 are register ed trademarks of the Microsoft Corporation.

Safety Notices

Warning

Weight Exceeds 100 lbs. (45 kg.)

Do NOT lift unassisted. Use a lift device or two people.

To protect against personal injury and product damage, do not attempt to lift the product without the assistance of another person or lift device.

Components bearing this symbol may be hot to touch.

Components bearing this symbol are fragile. Handle wit h care.

Components bearing this symbol are susceptible to damage by static electricity. ESD pr ec autions are required.

Service

Any servicing, adjustment, maintenance, or repair must be performed only by authorized servicetrained personnel.

Format Conventions

Denotes

WARNING

Caution A hazard that can cause hardware or software damage

Note Significant concepts or operating instructions

this font

this font Text displayed on the screen

A hazard that can cause personal injury

Text to be typed verbatim: all commands, path names, file names, and directory names

Printing History

1st Edition - September 1999 2nd Edition - October 1999 3rd Edition - February 2000 4th Edition - July 2000 5th Edition - September 2000 6th Edition - October 2000 7th Edition - Decemb er 2000

Manual Revision History

December 2000

Change Page

Added Figure 87 to clarify operation of the write cache flush thresholds. 253 Added note regarding t he impact of LUN binding on performance. 250 Added information on Managing the Universal Transport Mechanism (UTM). 298 Added information on major event logging available with firmware HP08. 307 Added Allocating Space for Disk Array Logs section describing use of

environment variable Added information on Purging Controller Logs. 311 Added information for RAID 0 support on HP-UX. 47 Changed the required m inimu m numb er of disk module s per encl osure fro m

2 to 4 based on power supply requirements for the disk enclosure.

AM60_MAX_LOG_SIZE_MB.

308

About This Book

This guide is intended for use by syst em administrators and others involved in operating and managing the HP SureStore E Disk Array FC60. It is organized into the following chapters and section.

Chapter 1, Product Description

Chapter 2, Topology and Array Planning

Chapter 3, Installation Chapter 4, Managing the Disk Array on

HP-UX Chapter 5, HP-UX Diagnostic Tools

Chapter 6, Troubleshooting

Chapter 7, Removal and Replacement

Chapter 8, Reference / Legal / Regulatory

GLOSSARY Index

Describes the feat ures, controls , and operati on of the disk array.

Guidelines for designing the disk array configura tion that best meets your needs.

Instruction for moving the disk array. Complete instructions for managing your disk array

using the available management software. Information on using STM to gather in formation abou t

disk array s tatus. Instructions for isolating and solving common

problems that may occur during disk array operation. Instructions for removing and replacing all customer-

replaceable components. Regulatory, environmental, and other reference

information.

Related Documents and Information

The following items co ntain information related t o the installation and use of the HP SureStore E Disk Array and its management software.

HP SureStore E Disk Array FC60 Advanced User’s Guide -

•

book you are reading. Topics that a re discu ssed in m ore d etail i n the Ad vanc ed User’ s Gui de are clearly identified throughout this book.

Download: www.hp.com/support/fc60

HP Storage Manager 60 User’s Guide

•

disk array management software for Windows NT and Windows 2000. It is included with the A5628A software kit.

Download: www.hp.com/support/fc60

HP Storage Manager 60 Introd uction Guide

•

software for Windows NT and Windows 2000. It is included in electronic format on the

Storage Manager 60 CD

Download: www.hp.com/support/fc60

Fibre Channel Mass Storage Adapters Service and User Manual

•

Fibre Channel Mass Storage/9000. It describes installation of the Fibre Channel I/O adaptors into K-, D-, T-, and V-class systems.

Download: www.hp.com/essd/efc/A3636A_documentation.html

Using EMS HA Monitors

•

used for hardware monitoring.

Download: http://www.docs.hp.com/hpux/ha/

(B5735-90001) - contains information about the EMS environment

- this guide describes the features and operation of the

- this guide introd uces the disk arr ay managem ent

this is the expanded version of the

(A3636-90002) - describes

EMS Hardware Monitors User’s Guide

•

protect your system fro m undetected failures.

Download: http://www.docs.hp.com/hpux/systems/

Diagnostic/IPR Media User’s Guide

•

enabling the E M S Hardware Event Monitors.

Download: http://www.docs.hp.com/hpux/systems/

Managing MC/ServiceGuard

•

dependencies for hardwa re resources.

Download: http://www.docs.hp.com/hpux/ha/

(B3939-90024) - provides information on creating package

- describes how to use the EMS Hardware Monitors to

(B6191-90015) - provides information on using STM, and

1 Product Description

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Operating System Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Management Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Scalable Storage Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

LED Status Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

EMS Hardware Event Monitoring (HP-UX Only) . . . . . . . . . . . . . . . . . . . . . . . . .22

Disk Enclosure Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Operation Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Disk Enclosure SC10 Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Array Controller Enclosure Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Front Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Controller Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Controller Fan Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Power Supply Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Power Supply Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Battery Backup Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Disk Array High Availability Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

RAID Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Disk Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Data Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Data Striping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

RAID Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

RAID Level Comparisons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Global Hot Spare Disks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Primary and Alternate I/O Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Capacity Management Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

LUNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Contents

Disk Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Disk Array Caching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Dynamic Capacity Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

2 Topology and Array Planning

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Array Design Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Array Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

RAID, LUNs, and Global Hot Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Storage Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Expanding Storage Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Recommended Disk Array Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Configuration Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

One Disk Enclosure Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Two Disk Enclosure Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Three Disk Enclosure Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Four Disk Enclosure Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Five Disk Enclosure Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Six Disk Enclosure Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Total Disk Array Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

For high-availability, one disk per SCSI channel is used as a global hot spare.. . 101

Topologies for HP-UX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Basic Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

Single-System Distance Topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

High Availability Topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

High Availability, Distance, and Capacity Topology . . . . . . . . . . . . . . . . . . . . .120

Campus Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

Performance Topology with Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

Topologies for Windows NT and Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . .131

Non-High Availability Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

High Availability Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

3Installation

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

Host System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145

HP-UX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 45

Windows NT and Windows 2000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

Site Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147

Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147

Electrical Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147

Power Distribution Units (PDU/PDRU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150

Installing PDUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

Recommended UPS Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

Installing the Disk Array FC60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155

Installing the Disk Enclosures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 60

Step 1: Collect Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160

Step 2: Unpack the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160

Step 3: Install Mounting Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162

Step 4: Install the Disk Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162

Step 5: Install Disks and Fillers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 66

Moving a Disk Enclosure from One Disk Array to Another . . . . . . . . . . . . . . .168

Installing the Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170

Step 1: Gather Required Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170

Step 2: Unpack the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170

Step 3: Install Mounting Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173

Step 4: Install the Controller Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173

Configuration Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176

Disk Enclosure (Tray) ID Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176

Disk Enclosure DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176

Fibre Channel Host ID Address Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

Contents

Attaching Power Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183

Attaching SCSI Cables and

Configuring the Disk Enclosure Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187

Full-Bus Cabling and Switch Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .188

Split-Bus Switch and Cabling Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . .191

Connecting the Fibre Channel Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196

Applying Power to the Disk Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

Verifying Disk Array Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206

On Windows NT and Windows 2000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206

On HP-UX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206

Interpreting Hardware Paths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208

Installing the Disk Array FC60 Software (HP-UX Only) . . . . . . . . . . . . . . . . . . . . .213

System Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

Verifying the Operating System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .214

Installing the Disk Array FC60 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .214

Downgrading the Disk Array Firmware for HP-UX 11.11 Hosts. . . . . . . . . . . .215

Configuring the Disk Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216

HP-UX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216

Windows NT and Windows 2000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220

Using the Disk Array FC60 as a Boot Device (HP-UX Only). . . . . . . . . . . . . . . . . .222

Solving Common Installation Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223

Adding Disk Enclosures to Increase Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224

General Rules for Adding Disk Enclosures to the Disk Array . . . . . . . . . . . . .224

Step 1. Plan the Expanded Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225

Step 2. Backup All Disk Array Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .226

Step 3. Prepare the Disk Array for Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . .226

Step 4. Add the New Disk Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227

Step 5. Completing the Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230

Capacity Expansion Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .232

4 Managing the Disk Array on HP-UX

Tools for Managing the Disk Array FC60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238

System Administration Manager (SAM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238

Array Manager 60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238

STM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238

Installing the Array Manager 60 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240

AM60Srvr Daemon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241

Running Array Manager 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241

Managing Disk Array Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 42

Configuring LUNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242

Selecting Disks for a LUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243

Assigning LUN Ownership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247

Selecting a RAID Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247

Global Hot Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248

Setting Stripe Segment Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 49

Evaluating Performance Impact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250

Adding Capacity to the Disk Array. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254

Adding More Disk Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 54

Adding Additional Disk Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256

Replacing Disk Modules with Higher Capacity Modules. . . . . . . . . . . . . . . . . .256

Upgrading Controller Cache to 512 Mbytes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .258

Managing the Disk Array Using SAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 60

Checking Disk Array Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261

Assigning an Alias to the Disk Array. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264

Locating Disk Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265

Binding a LUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267

Unbinding a LUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271

Replacing a LUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271

Adding a Global Hot Spare. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273

Removing a Global Hot Spare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275

Contents

Managing the Disk Array Using Array Manager 60. . . . . . . . . . . . . . . . . . . . . . . . . .276

Command Syntax Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .279

Array Manager 60 man pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .279

Quick Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .279

Selecting a Disk Array and Its Components . . . . . . . . . . . . . . . . . . . . . . . . . . . .280

Preparing to Manage the Disk Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .281

Checking Disk Array Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .282

Managing LUNs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

Managing Global Hot Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295

Managing Disk Array Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .297

Managing the Universal Transport Mechanism (UTM) . . . . . . . . . . . . . . . . . . .298

Managing Cache Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299

Performing Disk Array Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304

Managing Disk Array Logs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .307

Upgrading Disk Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

Managing the Disk Array Using STM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314

Checking Disk Array Status Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314

Binding a LUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314

Unbinding a LUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

Adding a Global Hot Spare. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

Removing a Global Hot Spare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 15

Locating Disk Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316

Status Conditions and Sense Code Information. . . . . . . . . . . . . . . . . . . . . . . . . . . .317

LUN Status Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317

Disk Status Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .319

Component Status Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .321

FRU Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .322

SCSI Sense Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327

5 HP-UX Diagnostic Tools

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346

Support Tools Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347

STM User Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347

STM Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .351

Using the STM Information Tool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352

Interpreting the Information Tool Information Log . . . . . . . . . . . . . . . . . . . . . .354

Interpreting the Information Tool Activity Log. . . . . . . . . . . . . . . . . . . . . . . . . .354

Using the STM Expert Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .355

6 Troubleshooting

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .360

About Field Replaceable Units (FRUs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

HP-UX Troubleshooting Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .362

Windows NT and Windows 2000 Troubleshooting Tools . . . . . . . . . . . . . . . . .362

EMS Hardware Event Monitoring (HP-UX Only) . . . . . . . . . . . . . . . . . . . . . . . .362

Disk Array Installation/Troubleshooting Checklist . . . . . . . . . . . . . . . . . . . . . . . . . 365

Power-Up Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .366

Controller Enclosure Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .367

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .367

Controller Enclosure LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .368

Master Troubleshooting Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .370

SureStore E Disk System SC10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . .376

Disk Enclosure LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .376

Losing LUN 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .376

Interpreting Component Status Values (HP-UX Only). . . . . . . . . . . . . . . . . . . .379

Isolating Causes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .380

Contents

7 Removal and Replacement

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .384

Disk Enclosure Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386

Disk Module or Filler Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386

Disk Enclosure Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .392

Disk Enclosure Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .394

Controller Enclosure Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .396

Front Cover Removal/Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .397

Controller Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .398

Battery Backup Unit (BBU) Removal/Replacement. . . . . . . . . . . . . . . . . . . . . .400

Power Supply Fan Module Removal/Replacement. . . . . . . . . . . . . . . . . . . . . . .403

Power Supply Module Removal/Replacement . . . . . . . . . . . . . . . . . . . . . . . . . .405

SCSI Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .407

8 Reference / Legal / Regulatory

System Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .410

Host Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .410

Supported Operating Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .410

Fibre Channel Host Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .411

Models and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .412

A5277A/AZ Controller Enclosure Models and Options . . . . . . . . . . . . . . . . . . .412

A5294A/AZ Disk Enclosure SC10 Models and Options . . . . . . . . . . . . . . . . . . .414

Disk Array FC60 Upgrade and Add-On Products . . . . . . . . . . . . . . . . . . . . . . . .416

PDU/PDRU Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .417

Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .418

A5277A/AZ Controller Enclosure Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .420

Dimensions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .420

Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .420

AC Power: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .421

Heat Output: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .421

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .422

Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .423

A5294A/AZ Disk Enclosure Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .424

Dimensions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .424

Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .424

AC Power:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .425

DC Power Output:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .425

Heat Output:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 25

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .426

Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .427

Warranty and License Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .428

Hewlett-Packard Hardware Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . .428

Software Product Limited Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .429

Limitation of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .429

Hewlett-Packard Software License Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .431

Regulatory Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .434

Safety Certifications:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .434

EMC Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .434

FCC Statements (USA Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .435

IEC Statement (Worldwide). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .435

CSA Statement (For Canada Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .435

VCCI Statement (Japan). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .436

Harmonics Conformance (Japan). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .436

Class A Warning Statement (Taiwan). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .436

Spécification ATI Classe A (France Seulement). . . . . . . . . . . . . . . . . . . . . . . . .437

Product Noise Declaration (For Germany Only) . . . . . . . . . . . . . . . . . . . . . . . .437

Geräuschemission (For Germany Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .438

Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .439

Contents

1 PRODUCT DESCRIPTION

Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Disk Enclosure Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Array Controller Enclosure Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Disk Array High Availability Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Capacity Management Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Product Description

The HP SureStore E Disk Array FC60 (Disk Array FC60) is a disk storage system that features high data availability, high performance, and storage scalability. To provide high availability, the Disk Array FC60 uses redundant, hot swappable modules, which can be replaced without disrupting disk array operation should they fail.

The Disk Array FC60 consists of two primary compone nts: an FC60 controller enclosure, and from one to six HP SureStore E Disk System SC10 enclosures (referred to throughout this document as simply di sk enclosures). The controller enclosure is respo nsible for providing overall control of the Disk Array FC60 by managing the communication between the host and the disk enclosures. Host communication is done through dual Fibre Channel arbitrated loops (whe n dual controller modules are installed). By using Fibre Ch annel, the Disk Array FC60 achieves a high data rate throughput. High data throughput is maintained to the disks by using u p to six Ultr a2 SCSI c hann els t o the disk en clos ures ( one ch anne l for each disk enclosure).

In addition to increase d performance, the use of multiple disk enclosures provides scalability — simplifying the process of adding storage capacity as needed. Up to six disk enclosures can be added incrementally as storage demands increase. Each disk enclosure holds up to ten disk modules in capacities of 9.1 Gbyte, 8.2 Gbyte, 36.4 Gbyte, or 73.4 Gbyte. A fully loaded syst em comprising six disk enclosures, each populated with ten 73.4Gbyte disk modules, achieves a capacity of over 3 Tbytes.

The Disk Array FC60 enclosures are designed for installation in HP’s original 19-inch cabinets, which include the C2785A (1.1m), C2786A (1.6m), C2787A (2m), A1896A (1.1 m), and A1897A (1.6 m) and the HP Rack System/E Racks which includes the A490xA and A150xA Rack System/E cabinets. The Disk Array FC60 is also supported in the Rittal 9000 Series racks.

18 Product Description

Array Controller FC60

Product Description

Figure 1

SureStore E Disk System SC10

HP SureStore E Disk Arra y FC60 (Controller with Six Disk Enclosures)

Product Description 19

Operating System Support

The Disk Array FC60 is currently supported on the followi ng operating systems:

HP-UX 11.0, 11.11, and 10.20

•

Windows NT 4.0

•

Windows 2000

•

Note

Some disk array featu res ar e specif ic to eac h op eratin g system. Th ese featu res are clearly identifi ed throughout this book.

Management Tools

HP-UX Tools

The following tools are available for managing the disk array on HP-UX. These tools are included with the disk array.

Array Manager 60 command line utilities

•

SAM

•

Support Tools Manager (STM)

•

Windows NT and Windows 2000

The following tools are used to manage the Disk Array FC60 on Windows NT and Windows

2000. This tool is not included with the disk array, but must be ordered separately as product A5628A.

HP Storage Manager 60

•

(A5628A)

Features

The Disk Array FC60 offers the following fe atures

High availability

•

Scalable storage capacity

•

LED status monitoring

•

20 Product Description

RAID levels 0, 1, 0/1, 3, and 5 ( RAID level 3 supported on Windows NT and Windows

•

2000 only) EMS hardware monitoring (HP-UX only)

•

High Availability

High availability is a general term that describes hardware and software systems that are designed to minimize system downtime — planned or unplanned. The Disk Array FC60 qualifies as high-availability hardware , achieving 99.99% availability.

The following features enable high availab ility:

Hot-swappable, high-capacity, high-speed disk modules

•

Dual Fibre Channel arbitrated loops (FC-AL) connection to the host

•

Redundant, hot-swappable, fans and power supplies

•

Support for RAID 1, 0/1, and 5

•

Remote monito ring and diagnosti c s

•

EMS Hardware event monitoring and real-time error reporting (HP-UX only)

•

Product Description

Note

The Disk Array FC60 is designed to operate with either one or two cont roller modules; however, for data integrity and high availability it is highly recommended th at dual controller modules be installed.

Scalable Storage Capacity

The Disk Array FC60 is designed to provide maxi mum scalability, simplifying the process of adding storage capacity as required. Storage capacity can be added in three ways:

– By adding additional disk modules to a disk enclosure – By adding additional disk enclosures to the array – By replacing existing disk modules with higher capacity modules

The controller enclosure supports up t o six disk enclosures. Each disk enclos ure holds up to ten disk modules in capacities of 9.1 Gbyte, 18.2 Gbyte, 36.4 Gbyte, or 73.4 Gbyte. The minimum configuration for the array is one disk enclosure with two 9.1-Gbyte disk modules. The maximum co nfiguration is six disk enclosures w ith ten 73.4-Gbyte disk

Product Description 21

modules. This provi des a storage cap acity range from 36 Gbytes to over 3 Tbytes of usab le storage.

LED Status Monitoring

Both the controller enclosure and disk enclosure monitor the status of their internal components and operations. At least one LED is provided for each swappable module. If an error is detected in any module, the error is displayed on the appropriate module’s LED. This allows failed modules to be quickly ide nt if ied and replaced.

EMS Hardware Event Monitoring (HP-UX Only)

The Disk Array FC60 is fully supported by Hewlett-Packard's EMS Hardware Monitors, which allow you to monitor all aspects of product operation and be alerted imme diately if any failure or other unusua l event occurs. Hardware monitoring is available at no cost to users running HP-UX 11.0 or 10.20.

Hardware monitoring provides a high level of protection against system hardware f ailure. It provides an important tool for implementing a high-availability strategy for your system. By using EMS Hardware Mo nitors, you can virtually eliminate undetected hardware failures that could interrupt syst em operation or cause data loss.

The EMS Hardware Monito r software with the Disk Array FC60 monitor is distributed on the

HP-UX Support Plus CD-ROM

installing and using hardware event monitoring is contained in the EMS Hardware Monitors User's Guide (B6191-90011). A copy of this book can be accessed from the Systems Hardware, Diagnostics, & Monitoring pa ge of Hewlett-Packard's on-line documentation web site at http :/ /www.docs.hp.com/hpux/systems/

release 9912 and later. Complete inf ormation on

The minimum supported version of the Disk Array FC60 hardware monitor (fc60mon) is A.01.04. To verify the version of the monitor installed, type:

what /usr/sbin/stm/uut/bin/tools/monitor/fc60mon

22 Product Description

Disk Enclosure Components

The SureStore E Disk System SC10, or disk enclosure, is a high availability Ultra2 SCSI storage product. It provides an LVD SCSI connection to the controller enclosur e and ten slots on a single-ended backpla ne for high-speed, high-capacity LVD SCSI disks. Six disk enclosures fully populated with 9.1 Gbtye disks provide 0.54 Tbytes of storage in a 2-meter System/E rack. When fully populated with 73.4 Gbyte disks, the array provides over 3 Tbytes of storage. These values represent maximum storage; usable storage space will vary depending on the RAID leve l used.

The disk enclosure consists of modular, redundant components that are e asy to upgrade and maintain. See Figure 2. Disks, fans, power supplies, and Bus Control Cards (BCCs) are replaceable parts that plug into individual slots in the front and back of the disk enclosure. Redundant fans, power supplies, an d disk modules can be removed and replaced without interrupting storage operations. In addition, a single disk within a LUN can be replaced while the system is on.

Product Description

Disk Enclosure Components 23

BCC Modules

Power Supply Modules

Fan Modules

Disk Modules

Chassis (and Backplane)

Figure 2

24 Disk Enclosure Components

Disk Enclosure Components, Exploded View

(Front Door Not Shown)

Operation Features

The disk enclosure is designed to be installed in a standard 19-inch rack and occupies 3.5 EIA units (high). Disk drives mount in t he front of the enclosure. Also located in t he f ront of the enclosure are a p ower switch and status LED s. A lockable fr ont door shields RFI and restricts access to the disk drives and power button (Figure 3 on page 26).

BCCs are installed in the back of the enclosure along with redundant power supp lies and fans.

Status Indicators

LEDs on the front and b ack of the di sk enclo sure enab le you to quickly id entify and repla ce failed components, thereby pre venting or minimizing downtime. "Troubleshooting" on

page 359 provides more detailed information abo ut the operation of these LEDs.

Two system LEDs on the front, top right corner of the disk enclosure (A in Figure 3) indicate the status of the disk enclosure. The left LED indicates when pow er is on or off and the right LED identifies if a fault has occurred. Additional pairs of LEDs above each disk slot (D in Figure 3), indicate disk activity and a fault condition. The l eft LED (green ) indicates disk I/O activity and the right LED goes on if the disk module has experienced a fault. The disk fault LE Ds are al so use d by t he ma nagement tools to identify a specific disk module by flashing its fault LED.

Product Description

On the back of the disk encl osure, the fo llowin g LEDs ( components and Fibre Channel link:

– Power supply status and fault LEDs – Fan status and fault LEDs

Bus Controller Card LEDs:

– BCC Fault LED – Term Power LED (monitors power on the SCSI bus) – Full Bus Mode LED – LVD Mode LED – Bus Free Status LED

For detailed information on LED operation, refer to "Troubleshooting" on page 359

) indicate the statu s of replac eable

Disk Enclosure Components 25

A system LEDs B power button C disk module D disk module LEDs Edoor lock FESD plug G mounting ea r H power supply IBCCs Jfans K component LEDs

Figure 3

Disk Enclosure Front and Back View

Power Switch

The power switch (B in Figure 3) interrupts power from the power supplies to t he disk enclosure component s. Power to the power supplies is cont rolled by the power cords and the AC source.

26 Disk Enclosure Components

Disk Enclosure SC10 Modules

The disk enclosure hot-sw appable modules include th e following:

Disks and fillers

•

Fans

•

Power supplies

•

Disks and Fillers

Hot-swappable disk modules make it easy to add or replace disks. Fillers are required in all unused slots to maintain proper airflow within the enclosure.

Figure 4 illustrates the 3.5-inch disks in a metal carrier. The open carrier design allows ten

half height (1.6 inch) disks to fit the 19-inch width of a standard rack and meet cooling needs.

WARNING Touching exposed circuits on the disk module can damage the disk

drive inside. T o avoid damage, always handle disks carefully and use ESD precautions.

Product Description

The following plastic parts of the disk are safe to touch:

Bezel-handle (A in Figure 4)

•

Cam latch (B)

•

Insertion guide (F)

•

Metal standoffs (D) protect exposed circuits against damage when the disk is laid circuit-side down on a flat surface.

Disk Enclosure Components 27

A bezel handle B cam latch E circuit board C car rier frame F insertion guide D standoffs G capacity label

Figure 4

Disk Module

Disks fit snugly in their slots. The cam latch (B in Figure 4) is used to seat and unseat the connectors on the backplane.

A label (G) on the disk provides the following information:

Disk mechanism height: 1.6 inch (h alf height) or 1 inch (low profile)

•

Rotational speed: 10K RPM and 15K RPM (18 Gbyte only)

•

Capacity: 9.1 Gbyte, 18.2 Gbyte, 36.4 Gbyte, or 73.4 Gbyte

•

A large zero on the capacity label distinguishes a filler from a disk. Fillers are required in all unused slots to maintain proper airflow within the enclosure.

AUTION

Fillers must be installed in unused slots to maintain proper cooling within the disk enclosure.

28 Disk Enclosure Components

BCCs

T wo Backplane Controller Cards, BCCs, control the disks on one or two buses according to the setting of the Full Bus switch. When the Full Bus switch is set to on, BCC A, in the top slot, accesses the disks in all ten slots. When the Full Bus switch is off, BCC A accesses disks in the even-numbered slot s and BCC B accesses disks in the odd-numbered slots.

Product Description

Note

In full bus mode, all ten disks can be accessed through either BCC. Howeve r, internally each BCC still manages five disks. This means that if the BCC that is not connected to the SCSI channel fails, access to its five disks will be lost. Failure of the BCC that is connected to the SCSI channel will render all ten disks inaccessible.

A alignment guides B SCSI Ports E DIP switches CLEDs Flocking screw D rotary switch G cam lever

Figure 5

BCC

Disk Enclosure Components 29

Each BCC provides two LVD SCSI ports (B in Figure 5) for connection to the controller enclosure.

The EEPROM on each BCC store s 2 data, including the manufacturer serial number, World Wide Name, and product number.

The following are additional features of the BCC:

LEDs (C in Figure 5) show the status of the BCC and the bus.

•

A rotary switch (D) used to set the enclosure (tray) ID which is used by internal

•

controller operations, and also by the management tools to identify each enclosure. DIP switches set disk enclosure option s. The only option used by the Disk Array FC60

•

is the full-bus/split-bus mode. Screws (F) prevent the card from being unintentionally disconnected .

•

Cam levers (G) assist in installing a nd removing the BCC from the enclos ure, ensuring

•

a tight connection with the backplane.

BCC functions include dr ive addressing, fault detection, and environmental services.

bytes of configuration information and user-defined

30 Disk Enclosure Components

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