Compaq 219700-001 - ProLiant - 1500 User manual

Brand: Compaq

Model: 219700-001 - ProLiant - 1500

Type: User manual

ONLINE STORAGE

CONTROLLER RECOVERY

OPTION

USER GUIDE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Writer: Ginny Green Project: OSCRO Title & Notice Pages Comments: 295586-001

File Name:OSTINO1.DOC Last Saved On:9/1/97 2:14 PM

Online Storage Controller

Recovery Option

User Guide

First Edition (September 1997)

Part Number

295586-001

Compaq Computer Corporation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Writer: Ginny Green Project: OSCRO Title & Notice Pages Comments: 295586-001

File Name:OSTINO1.DOC Last Saved On:9/1/97 2:14 PM

Notice

The information in this publication is subject to change without notice.

COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR

EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR

CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR

USE OF THIS MATERIAL. THIS INFORMATION IS PROVIDED “AS IS” AND COMPAQ

COMPUTER CORPORATION DISCLAIMS ANY WARRANTIES, EXPRESS, IMPLIED OR

STATUTORY AND EXPRESSLY DISCLAIMS THE IMPLIED WARRANTIES OF

MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE, GOOD TITLE AND AGAINST

INFRINGEMENT.

This publication contains information protected by copyright. No part of this publication may be

photocopied or reproduced in any form without prior written consent from Compaq Computer

Corporation.



1997 Compaq Computer Corporation.

The software described in this guide is furnished under a license agreement or nondisclosure agreement.

The software may be used or copied only in accordance with the terms of the agreement.

This publication does not constitute an endorsement of the product or products that were tested. The

configuration or configurations tested or described may or may not be the only available solution. This

test is not a determination of product quality or correctness, nor does it ensure compliance with any

federal, state, or local requirements. Compaq does not warrant products other than its own strictly as

stated in Compaq product warranties.

Compaq, SMART-2, ProLiant, and NetFlex are registered with the United States Patent and Trademark

Office.

Netelligent and ProSignia are trademarks and/or service marks of Compaq Computer Corporation.

Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation.

Product names mentioned herein may be trademarks and/or registered trademarks of their respective

companies.

Online Storage Controller Recovery Option User Guide

First Edition (September 1997)

Part Number 295586-001

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iii

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

OSCRO Table of Contents

Comments:

295586-001

File Name:

OSTOC2.DOC

Last Saved On:

9/23/97 2:56 PM

Contents

How To Use This Guide

How this Guide is Arranged.......................................................................................... vii

Symbols In Text............................................................................................................ viii

Symbols in Equipment ....................................................................................................ix

Getting Help ....................................................................................................................xi

Telephone Numbers .................................................................................................xi

Compaq Web Site.................................................................................................. xiii

Chapter 1

Elements of the Online Storage Controller Recovery Option Solution

Hardware Requirements............................................................................................... 1-1

Software Requirements ................................................................................................ 1-2

Kit Contents.................................................................................................................. 1-3

Chapter 2

Functionality and Configuration Options

Redundancy at the Mass Storage Controller Level...................................................... 2-1

Merging two SMART-2 Controllers into a Controlled Pair ........................................ 2-2

Configuration Options.................................................................................................. 2-4

Single-Channel Configuration .............................................................................. 2-6

Dual-Channel Configuration................................................................................. 2-8

Multiple Controller Pairs....................................................................................... 2-9

Internal vs. External Boot Device....................................................................... 2-10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Writer:

Ginny Green

Project:

OSCRO Table of Contents

Comments:

295586-001

File Name:

OSTOC2.DOC

Last Saved On:

9/23/97 2:56 PM

Chapter 3

Planning and Installing the Online Storage Controller Recovery Option

Hardware Planning....................................................................................................... 3-1

Controllers for OSCRO Implementation .............................................................. 3-1

Dual-Channel Configuration Considerations........................................................ 3-2

Knockout Panels.................................................................................................... 3-2

OSCRO Planning Implications..................................................................................... 3-3

Potential Impact on Unattended Reboot ............................................................... 3-4

Boot Device Configuration Planning.................................................................... 3-4

Array Acceleration Disabled................................................................................. 3-5

Recovery Server Option Incompatibility.............................................................. 3-5

Setting Up for OSCRO Installation.............................................................................. 3-5

Installing the Recovery Server Switch in the ProLiant Storage System/F or /U.. 3-6

Upgrading the SMART-2 Array Controller Firmware ......................................... 3-9

Updating the SMART-2 Array Controller Device Drivers................................. 3-10

Loading the Compaq SSD for Windows NT ...................................................... 3-10

Installation.................................................................................................................. 3-13

Installing the Controllers..................................................................................... 3-14

Labeling the Cables............................................................................................. 3-15

Connecting the Cables......................................................................................... 3-16

Merging Two Controllers into a Controller Pair................................................. 3-20

Testing and Verifying the Installation........................................................................ 3-22

Chapter 4

Compaq Online Storage Controller Recovery Utility

Major Functions............................................................................................................ 4-1

Right-Click Functionality............................................................................................. 4-2

Mass Storage Controller Icons ..................................................................................... 4-3

Viewing Device Properties........................................................................................... 4-6

Setting Machine Options............................................................................................ 4-10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

OSCRO Table of Contents

Comments:

295586-001

File Name:

OSTOC2.DOC

Last Saved On:

9/23/97 2:56 PM

Chapter 5

Troubleshooting

Controllers Must Be Matched ......................................................................................5-1

Planning for OSCRO when RSO is in Use .................................................................. 5-1

Incorrect Cabling.......................................................................................................... 5-1

Cross Connection .................................................................................................. 5-2

Unilateral Connection ........................................................................................... 5-4

Mismatched Controller Pairs................................................................................. 5-6

Clearing a Cable Check Error....................................................................................... 5-7

Verify Does Not Switch Back...................................................................................... 5-7

Wrong Device Driver ................................................................................................... 5-7

Controller Not Seen on the Online Storage Controller Recovery Utility .................... 5-7

Boot Device Considerations......................................................................................... 5-8

Chapter 6

Recovering from Mass Storage Controller Failure

Recovering from Mass Storage Controller Failure Using PCI Hot Plug

Technology................................................................................................................... 6-1

Recovering from Mass Storage Controller Failure Without PCI Hot Plug

Technology................................................................................................................... 6-3

Boot Device Considerations......................................................................................... 6-3

Chapter 7

Dissolving a Controller Pair.........................................................................

7-1

Appendix A

Electrostatic Discharge

Preventing Electrostatic Damage ............................................................................... A-1

Grounding Methods.................................................................................................... A-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Writer:

Ginny Green

Project:

OSCRO Table of Contents

Comments:

295586-001

File Name:

OSTOC2.DOC

Last Saved On:

9/23/97 2:56 PM

Appendix B

Regulatory Compliance Notices

Class A Equipment......................................................................................................B-1

Modifications........................................................................................................B-1

Cables...................................................................................................................B-1

Canadian Notice (Avis Canadien)...............................................................................B-1

Class A Equipment...............................................................................................B-1

European Union Notice................................................................................................B-2

Japanese Notice ...........................................................................................................B-3

Australian Notice.........................................................................................................B-3

Appendix C

Building Diskettes from the SmartStart and Support Software CD

Building Diskettes for the SMART-2 Array Controller Firmware Upgrade..............C-1

Building Diskettes for the Compaq System Configuration Utility

version 2.36 rev. A ......................................................................................................C-4

Index

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vii

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

How To Use This Guide

Comments:

295586-001

File Name:

OSABTHG3.DOC

Last Saved On:

9/23/97 11:09 AM

How To Use This Guide

This guide provides procedures for configuring, installing, maintaining, and

supporting the Online Storage Controller Recovery Option (OSCRO). It is

designed to be a reference for implementing and troubleshooting OSCRO

configurations. The other high-availability options in the Recovery Server

Option/F kit, Standby Recovery Server and On-Line Recovery Server, are covered

in the Recovery Server Option User Guide (part number 213818-004), which is

also in the kit.

How this Guide is Arranged

The manual is divided into the following chapters:

■ Chapter 1 - Elements of the Online Storage Controller Recovery

Option Solution

This section covers the hardware and software requirements of the

Online Storage Controller Recovery Option and provides a breakdown

of the contents of the kit.

■ Chapter 2 - Functionality and Configuration Options

This section describes the basic functionality and benefits of OSCRO

and details configuration options.

■ Chapter 3 - Planning and Installing the Online Storage Controller

Recovery Option

This section provides step-by-step instructions for planning and

installing OSCRO.

■ Chapter 4 - Compaq Online Storage Recovery Utility

This section describes the use of the Compaq Online Storage Controller

Recovery Utility.

■ Chapter 5 - Troubleshooting

This section describes error conditions and incorrect configurations of

OSCRO.

■ Chapter 6 - Recovery from Mass Storage Controller Failure

This section details recovery procedures to be used when a mass storage

controller fails under OSCRO.

■ Chapter 7 - Dissolving a Controller Pair

This section explains how and when to dissolve a controller pair.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii How To Use This Guide

Writer:

Ginny Green

Project:

How To Use This Guide

Comments:

295586-001

File Name:

OSABTHG3.DOC

Last Saved On:

9/23/97 11:09 AM

■ Appendixes include important information related to electrostatic

discharge, regulatory compliance notices, and how to build diskettes

from the SmartStart and Support Software CD.

Symbols In Text

WARNING: Text set off in this manner indicates that failure to follow

directions in the warning can result in bodily harm or loss of life.

CAUTION: Text set off in this manner indicates that failure to follow

directions can result in damage to equipment or loss of information.

IMPORTANT: Text set off in this manner presents clarifying information or specific

instructions.

NOTE: Text set off in this manner presents commentary, sidelights, or interesting

points of information.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

How To Use This Guide

Comments:

295586-001

File Name:

OSABTHG3.DOC

Last Saved On:

9/23/97 11:09 AM

Text Conventions

Convention Use

Keys

Keys appear in boldface. A plus sign (+)

between two keys indicates that they

should be pressed simultaneously.

USER INPUT User input appears in a different typeface

and in uppercase

FILENAMES

File names appear in uppercase italics

Menu Options, Command Names,

Dialog Box Names

These appear in initial capital letters

COMMANDS, DIRECTORY NAMES,

and DRIVE NAMES

These always appear in uppercase

Type When you are instructed

to type

information, type the information

without

pressing the

Enter

key

Enter When you are instructed

to enter

information, type the information and

then press the

Enter

key



Symbols in Equipment

WARNING: Any surface or area of the equipment marked with

these symbols indicates the presence of a hot surface or hot

component. If this surface is contacted, the potential for injury

exists. To reduce the risk of injury from a hot component, allow the

surface to cool before touching.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

x How To Use This Guide

Writer:

Ginny Green

Project:

How To Use This Guide

Comments:

295586-001

File Name:

OSABTHG3.DOC

Last Saved On:

9/23/97 11:09 AM

WARNING: Any surface or area of the equipment marked with

these symbols indicates the presence of electrical shock hazards.

Enclosed area contains no operator-serviceable parts. To reduce

the risk of injury from electrical shock hazards, do not open this

enclosure.

WARNING: Any RJ-45 receptacle marked with these symbols

indicates a Network Interface Connection. To reduce the risk of

electrical shock, fire, or damage to the equipment, do not plug

telephones or telecommunications connectors into this receptacle.

WARNING: Some products are equipped with a three-wire, electrical

grounding-type plug that has a third pin for grounding. This plug only fits

into a grounded electrical outlet. This is a safety feature. Do not defeat the

safety purpose of the grounding-type plug by trying to insert it into a non-

grounded outlet. If you cannot insert the plug into the outlet, contact your

electrician to replace the obsolete outlet.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

How To Use This Guide

Comments:

295586-001

File Name:

OSABTHG3.DOC

Last Saved On:

9/23/97 11:09 AM

Getting Help

If you have a problem and have exhausted the information in this guide, you

can get further information and other help in the following locations.

Telephone Numbers

Contact your nearest Compaq Authorized Reseller or Service Provider for more

information.

■ For the name of your nearest Compaq Authorized Reseller:

❏ In the United States, call 1-800-345-1518

❏ In Canada, call 1-800-263-5868

■ For Compaq technical support:

❏ In the United States and Canada, call 1-800-386-2172

❏ Elsewhere, call one of the numbers listed below

Compaq Worldwide Technical Support Telephone Numbers

Location Voice FAX

PD 65-7503030 65-7504909

rgentina 54-1 313 3100 54-1 313 3100 Ext 21

ustralia 61-2-9911-1955 61-2-9911-1900

ustria 0222-87816-16 0222-87816-82

Bahrain 973-210-214

Belgium (02) 716-96-96 (02) 725-22-13

Brazil 55 11 5505-3600 55 11 5505-3922 Ext 4336

Canada 1-800-386-2172

Caribbean 1-800-345-1518

Central America 713-378-2206

Continued

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xii How To Use This Guide

Writer:

Ginny Green

Project:

How To Use This Guide

Comments:

295586-001

File Name:

OSABTHG3.DOC

Last Saved On:

9/23/97 11:09 AM

Compaq Worldwide Technical Support Telephone Numbers

Continued

Location Voice FAX

Chile 562-274-3007

China 86-10-834-6721 86-10-834-6713

Colombia 571-345-0266 571-312-0157

Czech Republic 42-2-232-8772 42-2-232-8773

Denmark 45-90-4545 45-90-4595

Ecuador 593-2504540

Europe/Middle East/Africa (49) 089-9933-2891

Finland 9800-206-720

(358-800-1-206720)

90-6155-9899

(358-0-61559899

France (33 1) 41-33-4455 (33 1) 41-33-4263

Germany 0180-5-212111 089-9933-3399

Hong Kong 852-90116633 852-28671734

Hungary 36-1-201-8776 36-1-201-9696

India (91-80) 559-6023

Italy 392-57-90300 392-575-00686

Japan 0120-101589 81 3-5402-5959

Korea 82-2-523-3575 82-2-3471-0321

Malaysia (603) 718-1636

Mexico (525) 229-7910 (525) 229-7988

Netherlands 06-91681616 06-8991116

New Zealand 649-307-3969

Norway 22-072-020 22-072-021

Poland 48-2-630-3535 48-2-630-3553

Portugal 351-1-4120132 351-1-4120654

Singapore 65-7503030 65-7504909

South Africa 27-11-728-6999 27-11-728-3335

Spain 341-640-1302 341-640-0124

Sweden (46) 8 703 5240 (46) 8 703 5222

Switzerland 411 838 410/2222 01-837-0969

Taiwan (886) 2-3761170 (886) 2-7322660

Thailand 62-2-679-6222 62-2-679-6220

United Kingdom 44-81-332-3888 44-81-332-3409

United States 1-800-386-2172 1-800-345-1518

Venezuela (582) 953.69.44 (582) 952.86.70

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xiii

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

How To Use This Guide

Comments:

295586-001

File Name:

OSABTHG3.DOC

Last Saved On:

9/23/97 11:09 AM

Compaq Web Site

The Compaq Web site has information on this product as well as the latest

drivers and Flash ROM images. You can access the Compaq Web site by

logging on to the Internet at http://www.compaq.com.

OSCRO Suggestions and Comments

For suggestions and comments about OSCRO, please send e-mail to:

[email protected]

using OSCRO in the Subject line.

We regret we are unable to respond individually to e-mail suggestions.

Please do not send support questions to this address.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

Elements of the Online Storage Recovery Option Solution

Comments:

295586-001

File Name:

OSCHP1-4.DOC

Last Saved On:

9/23/97 12:36 PM

Chapter 1

Elements of the Online Storage

Controller Recovery Option

Solution

The Online Storage Controller Recovery Option (OSCRO), which is a part of

the Recovery Server Option kit, includes hardware and software elements, and

requires careful configuration and setup. You must understand what can and

cannot be done with existing hardware and the other options in the Recovery

Server Option /U kit.

There are three high-availability option solutions in the Recovery Server

Option /U kit. They are:

■

Standby Recovery Server

■

On-Line Recovery Server

■

Online Storage Controller Recovery Option

If you want to install either the Standby Recovery Server or the On-Line

Recovery Server option, please direct your attention to the

Recovery Server

Option User Guide

(part number 213818-004).

Hardware Requirements

The following hardware components are required for OSCRO:

■

Compaq ProLiant or ProSignia server

■

For some server models, a knockout panel

■

Two Compaq SMART-2 Array Controllers of the same type

■

Compaq ProLiant Storage System(s)/F or /U

■

Fast-Wide SCSI cables (either 6 or 12 feet in length) to connect

SMART-2 controllers to the ProLiant Storage System(s)/F or /U

■

Recovery Server Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

Elements of the Online Storage Recovery Option Solution

Writer:

Ginny Green

Project:

Elements of the Online Storage Recovery Option Solution

Comments:

295586-001

File Name:

OSCHP1-4.DOC

Last Saved On:

9/23/97 12:36 PM

NOTE: OSCRO is supported for the single bus versions of the ProLiant Storage

System/F and /U units, in both the tower and rack-mount configurations. Older

ProLiant Storage Systems and duplex versions of the ProLiant Storage System are

not supported by OSCRO. The ProLiant Storage System/F and /U units that are and

are not supported are pictured in Figure 1-1.

US Part Number 146700

189600

197100

Intl. Part Number 146750

189640

197150

US Part Number 272800

272900

304100-B21

304110-B21

Intl. Part Number 272804

272904

304104-B31

304114-B31

Not

Supported

Figure 1-1.

Compaq ProLiant Storage Systems

Software Requirements

OSCRO is supported only under Windows NT 4.0.

All software required to implement OSCRO is on the Compaq SmartStart and

Support Software CD included in the kit. This CD includes the Compaq Support

Software for Microsoft Windows NT (SSD) (version 2.02 or later) and updated

firmware and device drivers for the Compaq SMART-2 Array Controllers. For

instructions on how to build diskettes from the CD, see Appendix C “Building

Diskettes from the SmartStart and Support Software CD.”

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

Elements of the Online Storage Recovery Option Solution

Comments:

295586-001

File Name:

OSCHP1-4.DOC

Last Saved On:

9/23/97 12:36 PM

The Compaq SSD for Windows NT includes the following elements required to

implement OSCRO:

■

Compaq Online Storage Controller Recovery Utility

■

Updated Compaq SMART-2 Array Controller device driver

(CPQARRAY.SYS)

■

Compaq System Management driver

(SYSMGMT.SYS)

■

Compaq Remote Monitoring service

(CPQRCMC.EXE)

OSCRO also requires installation of the Remote Procedure Call (RPC)

Service, which is part of the Windows NT operating system. If OSCRO is

also to be used to manage remote servers, you need to install a routable

protocol that supports RPC (such as TCP/IP).

The ROMPaq for the SMART-2 firmware upgrade (version 1.94 or later) is

included on the SmartStart and Support Software CD in the Recovery Server

Option /U kit. It can also be found on the Compaq Web site.

Kit Contents

The Recovery Server Option /U kit (part number 304117-B21) includes

hardware and software required for implementation of OSCRO and some

additional parts (that would be used if you were installing either the Standby

Recovery Server or On-Line Recovery Server option).

Check Figure 1-2 to verify that you have all of the necessary items for OSCRO

implementation. The items in the kit that relate to OSCRO are:

■

One Recovery Server Switch (part number 007678-001)

■

One Knockout Panel Assembly (part number 189620-001)

■

One External Fast-Wide SCSI Cable (part number 189646-003)

■

Compaq SmartStart and Support Software CD (part number 196268-

001), which includes all of the software and drivers required for the

Online Storage Controller Recovery Option

■

The

Online Storage Controller Recovery Option User Guide

(this document)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4

Elements of the Online Storage Recovery Option Solution

Writer:

Ginny Green

Project:

Elements of the Online Storage Recovery Option Solution

Comments:

295586-001

File Name:

OSCHP1-4.DOC

Last Saved On:

9/23/97 12:36 PM

The contents of the Recovery Server Option /U kit are illustrated in

Figure 1-2. When implementing OSCRO, not all of the parts in the kit will

be needed. Those that are not needed for OSCRO are shaded in the figure.

To implement OSCRO, you may also need one or more additional internal

SCSI ribbon cables (part number 199595-002). These are the original cables

that came with your SMART-2 Array Controllers. If you do not have the

correct cables and you are planning a dual-channel configuration (see

Chapter 2), you also need one or more Spares kits (part number 198639-

001). Spares kits include the required ribbon cable, screws, and screwlocks

required for OSCRO implementation.

Verify that you have all the necessary items before beginning the installation.

RSO User Guide

189646

189620

Important

Card

007678

OSCRO User Guide

213807

196268

Figure 1-2.

Kit Contents (Part Number 304117-B21)

After verifying that you have all the required elements for the OSCRO

implementation you are planning, proceed to Chapter 2 to learn more about

OSCRO.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1

Online Storage Controller Recovery Option User Guide

Writer:

Ginny Green

Project:

Functionality and Configuration Options

Comments:

295586-001

File Name:

OSCHP2-5.DOC

Last Saved On:

9/23/97 12:45 PM

Chapter 2

Functionality and Configuration

Options

There are three high-availability option solutions in the Recovery Server

Option /U kit:

■ Standby Recovery Server

■ On-Line Recovery Server

■ Online Storage Controller Recovery Option (OSCRO)

The first two option solutions minimize server downtime by automatically

transferring operations from a failed server to a backup server.

OSCRO, on the other hand, provides a way to reduce or eliminate downtime

associated with mass storage controller failure. In this chapter, we examine how

OSCRO provides this benefit.

Redundancy at the Mass Storage

Controller Level

In the past, the effort to improve the reliability of I/O subsystems focused on

redundant arrays of independent disks (RAID). RAID protects data if a disk

drive fails but offers no protection against mass storage controller failure.

Windows NT provides the option to implement a fully redundant I/O subsystem

in a configuration called Disk Duplexing. Disk Duplexing implemented at the

software level provides protection against failure of the disk as well as the mass

storage controller. Disk Duplexing requires complete redundancy of all I/O

subsystem components, however, which makes it very costly to implement and

limits the extensibility of the system.

With the introduction of OSCRO and its two-way switching capability,

Compaq offers fault tolerance for mass storage controllers implemented at the

hardware level, providing increased reliability without the need for complete

I/O subsystem redundancy.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2

Functionality and Configuration Options

Writer:

Ginny Green

Project:

Functionality and Configuration Options

Comments:

295586-001

File Name:

OSCHP2-5.DOC

Last Saved On:

9/23/97 12:45 PM

Merging two SMART-2 Controllers

into a Controlled Pair

OSCRO allows you to merge two matched SMART-2 controllers into a

controller pair. In such a pair, one controller is active and the other remains

in standby mode. Should a problem occur with the active controller, the

SMART-2 device driver switches traffic to the standby controller without

loss of data or interruption of service (see Figure 2-1).

Figure 2-1.

Online Storage Controller Recovery Option Overview

Device

Driver

Device

Driver

Active

Standby

Failed

A controller pair

is established.

If the active controller fails, the standby

controller is promoted to active.

Page is loading ...

Compaq 219700-001 - ProLiant - 1500 User manual

Compaq 219700-001 - ProLiant - 1500 User manual

Compaq 219700-001 - ProLiant - 1500 User manual

Related papers

Other documents