HP XP for Compatible Extended Remote Copy Software Licenses User Manual

HP StorageWorks

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide

Part number: T5238–96001 First edition: January 2008

Legal and notice information

Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Microsoft, Windows, and Windows XP are U.S. registered trademarks of Microsoft Corporation.

Java is a US trademark of Sun Microsystems, Inc.

Oracle is a registered US trademark of Oracle Corporation, Redwood City, California.

UNIX is a registered trademark of The Open Group.

Hitachi and Universal Replicator are registered trademarks of Hitachi, Ltd.

ShadowImage and TrueCopy are registered trademarks of Hitachi, Ltd. and Hitachi Data Systems Corporation.

Export Requirements

You may not export or re-export this document or any copy or adaptation in violation of export laws or regulations.

Without limiting the foregoing, this document may not be exported, re-exported, transferred or downloaded to or within (or to a national resident of) countries under U.S. economic embargo, including Cuba, Iran, North Korea, Sudan, and Syria. This list is subject to change.

This document may not be exported, re-exported, transferred, or downloaded to persons or entities listed on the U.S.Department of Commerce Denied Persons List, Entity List of proliferation concern or on any U.S. Treasury Department Designated Nationals exclusion list, or to parties directly or indirectly involved in the development or production of nuclear, chemical, biological weapons, or in missile technology programs as specified in the U.S. Export Administration Regulations (15 CFR 744).

Revision History

DescriptionDateEdition

This edition applies to microcode version 60-02-25-00/00 or later.January 2008First

Contents

About this Guide .................................................................................. 7

Intended Audience ...................................................................................................................... 7

Related Documentation ................................................................................................................ 7

Document Conventions ................................................................................................................ 8

Convention for Storage Capacity Values ........................................................................................ 8

Graphical Interface Illustrations ..................................................................................................... 8

HP Technical Support .................................................................................................................. 8

Subscription Service .................................................................................................................... 9

HP Websites .............................................................................................................................. 9

Documentation Feedback ............................................................................................................. 9

1 Overview of Compatible XRC ............................................................ 11

About Compatible Replication for IBM™ XRC (Compatible XRC) ..................................................... 11

Reviewing Other Supported Copy Features ................................................................................... 11

TrueCopy .......................................................................................................................... 12

ShadowImage ................................................................................................................... 12

FlashCopy Mirroring ........................................................................................................... 12

2 About Compatible XRC Operations .................................................... 13

Function Overview .................................................................................................................... 13

Sessions ............................................................................................................................ 13

TSO Commands ................................................................................................................. 14

Configuration ........................................................................................................................... 14

Interoperability with Other Products and Functions ......................................................................... 15

Using Two Compatible XRC Pairs in Conjunction .................................................................... 16

Using Compatible XRC in Conjunction with TrueCopy ............................................................. 16

Using Compatible XRC in Conjunction with ShadowImage ...................................................... 17

Using Compatible XRC in Conjunction with FlashCopy Mirror ................................................. 18

3 Preparing for Compatible XRC Operations .......................................... 21

System Requirements ................................................................................................................. 21

Requirements and Restrictions for Using Compatible XRC ............................................................... 22

Supported Functions ........................................................................................................... 22

Number of Sessions .................................................................................................................. 23

Performance Considerations ................................................................................................ 23

Notes and Questions .......................................................................................................... 23

Installing the Compatible XRC Software ....................................................................................... 29

4 Performing Compatible XRC Operations .............................................. 31

Starting Compatible XRC .......................................................................................................... 31

Using the Compatible XRC GUI .................................................................................................. 31

Compatible XRC Window ................................................................................................... 31

Change Option Dialog ....................................................................................................... 33

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 3

Setting Compatible XRC Options ................................................................................................ 37

Changing Settings in the Preview List ...........................................................................................38

Deleting Settings from the Preview List .......................................................................................... 38

5 Troubleshooting ............................................................................... 41

Troubleshooting ........................................................................................................................ 41

Contacting HP Technical Support ................................................................................................ 41

A Acronyms and Abbreviations ............................................................. 43

Index ................................................................................................. 45

Figures

Overview of HP Compatible XRC Operations ............................................................. 131

Channel Extender Connection Configuration for Compatible XRC .................................. 152

Double Compatible XRCs ......................................................................................... 163

Configuration with Volume Functioning as Compatible XRC P-VOL and TrueCopy

M-VOL ................................................................................................................... 16

Configuration with Volume Functioning as Compatible XRC S-VOL and TrueCopy

M-VOL ................................................................................................................... 17

Configuration with Volume Functioning as Compatible XRC P-VOL and ShadowImage

S-VOL .................................................................................................................... 17

Configuration with Volume Functioning as Compatible XRC S-VOL and ShadowImage

S-VOL .................................................................................................................... 18

Configuration with One Volume Used as Compatible XRC P-VOL Another as S-VOL ......... 188

Configuration with Volume Functioning as Compatible XRC P-VOL and FlashCopy Mirroring

S-VOL .................................................................................................................... 19

Configuration with Volume Functioning as Compatible XRC S-VOL and FlashCopy Mirroring

S-VOL .................................................................................................................... 19

Configuration with One Volume Used as P-VOL and Another Volume Used as S-VOL ........ 2011

Compatible XRC Window ........................................................................................ 3212

Change Option Dialog Box ...................................................................................... 3313

Controlling the Amount of Write Data ........................................................................ 3514

Controlling the Amount of Write Data (2) ................................................................... 3615

Confirm Dialog Box Displayed After Selecting Check Box ............................................. 3716

Confirmation Dialog Box Indicates that a Pair is Suspended ......................................... 3817

Confirmation Dialog Box Asking to Apply Settings to the Storage System ....................... 3818

Dialog Box Indicates that the Operation is Finished ..................................................... 3819

Confirm Dialog Box Indicating that a Setting will be Deleted from the Preview List ........... 3920

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 5

Tables

Document Conventions .............................................................................................. 81

Volume Sharing between XRC and Other Copy Functions ............................................. 152

Features Supported by Compatible XRC ..................................................................... 223

Number of HP Compatible XRC Sessions ................................................................... 234

Number of Sessions per Volume ............................................................................... 235

Combinations of ESCON and FICON Paths ............................................................... 246

HP Compatible XRC in Conventional Models and XP24000/XP20000 Disk Arrays ......... 257

Behavior of the Storage System - Block Option of Compatible XRC is Set to Volume

Level ..................................................................................................................... 26

Behavior of the Storage System - Block Option of Compatible XRC is Set to Cache

Level ..................................................................................................................... 27

Acronyms and Abbreviations .................................................................................... 4310

About this Guide

This document describes and provides instructions for using the Compatible Replication for IBM XRC features of the HP XP24000/XP20000 Disk Arrays.

Unless otherwise specified, the term storage system in this guide refers to an HP XP24000 Disk Array or an XP20000 Disk Array.

Intended Audience

This document is intended for system administrators, HP representatives, and authorized service providers who are involved in installing, configuring, and operating the HP XP24000/XP20000 Disk Array.

This document assumes the following:

• The user has a background in data processing and understands RAID storage systems and their

basic functions.

• The user is familiar with XP24000/XP20000 storage systems and has read the HP StorageWorks

XP24000 Disk Array Owner's Guide or the HP StorageWorks XP20000 Disk Array Owner's Guide.

• The user is familiar with the XP Remote Web Console software for the XP disk array and has read

the HP StorageWorks XP24000/XP20000 Remote Web Console User's Guide.

Document Conventions

Table 1 Document Conventions

ElementConvention

Cross-reference links and e-mail addressesBlue text: Table 1

Blue, underlined text:

ttp://www.hp.com

Bold text

Website addresses

• Text emphasis

• UI elements

Convention for Storage Capacity Values

HP XP storage systems use the following values to calculate physical storage capacity values (hard disk drives):

• 1 KB = 1,000 bytes

•

1 MB = 1,0002 bytes

•

1 GB = 1,0003 bytes

•

1 TB = 1,0004 bytes

HP XP storage systems use the following values to calculate logical storage capacity values (logical devices):

• 1 KB = 1,024 bytes

•

1 MB = 1,0242 bytes

•

1 GB = 1,0243 bytes

•

1 TB = 1,0244 bytes

• 1 block = 512 bytes

Graphical Interface Illustrations

The GUI illustrations in this guide were created using a Windows computer with the Internet Explorer browser. Actual windows may differ depending on the operating system and browser used. GUI contents also vary with licensed program products, storage system models, and firmware versions.

HP Technical Support

For worldwide technical support information, see the HP support website:

http://www.hp.com/support

Before contacting HP, collect the following information:

• Product model names and numbers

About this Guide8

• Technical support registration number (if applicable)

• Product serial numbers

• Error messages

• Operating system type and revision level

• Detailed questions

Subscription Service

HP recommends that you register your product at the Subscriber’s Choice for Business website:

http://www.hp.com/go/e-updates

After registering, you will receive e-mail notification of product enhancements, new driver versions, firmware updates, and other product resources.

HP Websites

For additional information, see the following HP websites:

•http://www.hp.com

•http://www.hp.com/go/storage

•http://www.hp.com/service_locator

•http://www.hp.com/support/manuals

Documentation Feedback

HP welcomes your feedback.

To make comments and suggestions about product documentation, send a message to

storagedocsFeedback@hp.com. All submissions become the property of HP.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 9

About this Guide10

1 Overview of Compatible XRC

This chapter summarizes the IBM Compatible XRC process and reviews the copy features that can be used in combination with Compatible XRC in mainframe systems.

• About Compatible Replication for IBM XRC (Compatible XRC)

• Reviewing Other Supported Copy Features

About Compatible Replication for IBM™ XRC (Compatible XRC)

Compatible Replication for IBM™ XRC (henceforth referred to as Compatible XRC) in the XP24000 Disk Array and HP XP20000 Disk Array storage system is an asynchronous remote copy feature used for data backup in the event of a disaster.

Compatible XRC is used in mainframe systems and is functionally compatible with IBM Extended Remote Copy (XRC), an IBM host software feature. Compatible XRC is provided as a program product and is compatible with System Data Mover (SDM) in DFSMS (Data Facility Storage Management Subsystem), which is common to the XRC environment. Compatible XRC operations are performed in the same manner as XRC operations. XRC TSO commands are issued from the host system to the XP24000/XP20000 Disk Array storage system.

Compatible XRC temporarily stores the data written by the host at the primary site as a sidefile to the cache. Upon request of the host at the secondary site, Compatible XRC asynchronously transfers the sidefile for data backup to a secondary site.

Since compatible XRC is an asynchronous remote copy feature, response time to the primary site does not depend on the distance between the primary and secondary sites. Therefore, a long distance connection can be used between these sites. By using a common time stamp provided by the Sysplex timer, you can guarantee that data written at the secondary site is in the same order as at the primary site.

In Compatible XRC operations, a group of volumes is processed as one session. The order of writes at the secondary site is guaranteed for each session. You can register 4,096 sessions in one storage system and Compatible XRC enables you to have a large-scale remote copy system involving multiple hosts.

The Compatible XRC program product must be installed in the storage system at the primary site. For the installation procedure, please refer to the HP StorageWorks XP24000/XP20000 Remote Web Console User's Guide.

Reviewing Other Supported Copy Features

XP24000/XP20000 Disk Arrays support the following copy features that can be used in combination with HP Compatible XRC in mainframe systems:

• Hitachi TrueCopy™ for Mainframe

• Hitachi ShadowImage™ for Mainframe

• XP for Flashcopy™ Mirroring

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 11

TrueCopy

TrueCopy enables you to create copies of volumes in two different storage systems at remote locations. You can manage the data in mainframe systems by using the TrueCopy remote console software or by using TSO and/or IDSK commands.

TrueCopy has synchronous TrueCopy Asynchronous copy modes.

• TrueCopy synchronous can be used for volume-based real-time data backup. TrueCopy synchronous

can be used in conjunction with Compatible XRC to support disaster recovery systems in three data center (3DC) configuration. See “Using Compatible XRC in Conjunction with TrueCopy” on page 16 for further information on combining Compatible XRC with TrueCopy synchronous operations.

• TrueCopy Asynchronous enables you to back up data asynchronously using the host write operation,

so that the response time to the host is not increased.

This user’s guide does not cover TrueCopy operations. For information and instructions on performing TrueCopy operations, please refer to Hitachi TrueCopy™ for Mainframe User's Guide: HP XP24000/XP20000 Disk Array, or contact your HP account team.

ShadowImage

ShadowImage enables you to set up and maintain multiple copies of volumes within the same XP24000/XP20000 Disk Array storage system. You can manage data in mainframe systems by using the ShadowImage software or by using TSO and/or IBM's Device Support Facility (IDSF) commands.

The RAID-protected ShadowImage duplicate volumes are created within the same XP24000/XP20000 Disk Array storage system at hardware speeds. ShadowImagecan be used in conjunction with Compatible XRC to maintain multiple copies of critical data at your primary and/or secondary sites. See “Using Compatible XRC in Conjunction with ShadowImage for Mainframe” on page 17 for further information on combining Compatible XRC and ShadowImage operations.

This user’s guide does not cover ShadowImage operations. For information and instructions on performing ShadowImage, please refer to Hitachi ShadowImage™ for Mainframe User's Guide: HP XP24000/XP20000 Disk Array, or contact your HP account team.

FlashCopy Mirroring

Compatible Mirroring for IBM FlashCopy (henceforth referred to as FlashCopy Mirroring) enables you to set up and maintain multiple copies of volumes within the same XP24000/XP20000 Disk Array storage system. The FlashCopy Mirroring operations can be performed in the XP24000/XP20000 Disk Array storage systems by using the TSO and/or IBM’s Data Facility Storage Management Subsystem Data Set Services (DFSMSdss) commands from the host.

If you use FlashCopy Mirroring in conjunction with Compatible XRC, you are able to maintain multiple copies of critical data at your primary and/or secondary sites. For details of combination of HP Compatible XRC and FlashCopy Mirroring operations, see “Using Compatible XRC in Conjunction with FlashCopy Mirror” on page 18.

This user’s guide does not cover FlashCopy Mirroring operations. For information and instructions on performing FlashCopy Mirroring operations, please refer to the Hitachi ShadowImage™ for Mainframe

User's Guide: HP XP24000/XP20000 Disk Array, HP StorageWorks XP24000/XP20000 for FlashCopy Mirroring Software User's Guide, or contact your HP account team.

Overview of Compatible XRC12

2 About Compatible XRC Operations

This chapter contains details and examples of the data replication process.

• Function Overview

• Configuration

• Interoperability with Other Products and Functions

Function Overview

In HP Compatible XRC operations, the data written from the primary host at the primary site is written to the primary volume by means of the cache memory at the primary storage system. At the same time, the data is temporarily stored in cache memory as a sidefile. At the secondary site, System Data Mover (SDM)—which is host software—asynchronously reads the sidefile data over communication lines from the primary storage system at the primary site. SDM then writes the data to the secondary volume in the secondary storage system in the same order as it was written at the primary site.

SDM manages pair definitions of the primary and secondary storage systems or pair definitions of the primary and secondary volumes. An overview of XRC operations is shown in Figure 1 on page 13.

Sessions

Figure 1 Overview of HP Compatible XRC Operations

In HP Compatible XRC operations, a group of primary volumes is processed as one session. Data is written to the secondary volumes in each session in the same order as it was written at the primary site. In the event of a failure, all volume pairs in the same session are suspended. The write operation

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 13

is not performed due to the failure. However, the write order (sequence) is maintained so that the write process can be re-initiated after recovery.

A session is further divided into internal sessions called storage control sessions (SC sessions) per each volume. SDM reads the data written to the storage system at the primary site in order of time stamp in each SC session. SDM checks the time stamp of each SC session, and determines in what order the data is written to the secondary volumes. Data is written to the secondary volumes in units of session in the same order as it was written at the primary site, not in units of SC session.

SDM manages definitions of sessions and SC sessions. They are defined for session IDs and volumes by TSO command in the storage system.

TSO Commands

The following settings concerning XRC operations are defined by the TSO commands issued to the storage system from the host system.

• Creation and deletion of pair volumes

• Creation of utility volumes

• Display of pair status

• Display of session status

• Display of utility volume status

• Integration and withdrawal from the session

• Recovery at the secondary site

• Resuming suspended pairs

• Start and end of the session

• Suspending of pairs

Note:

For details of the TSO commands in Compatible XRC, see DFSMS Advanced Copy Services

(Document number: SC35-0428-02) published by IBM.

Configuration

HP Compatible XRC operations require hosts and XP24000/XP20000 Disk Array storage systems at the primary site; should operation at the secondary site be required, a secondary storage system (or storage system) must have the capability of supporting the XRC workload. If the system at the primary site consists of several hosts, a SYSPLEX timer is required in the primary host to provide a common time reference for the I/O time-stamping function. The secondary host requires SDM, which is host software, for remote copy operations. The XRC program product needs to be installed in the primary storage system. The primary site requires a XP Remote Web Console PC for setting XRC program product options.

Figure 2 on page 15 shows the connection configuration of channel extenders for Compatible XRC.

Notice that LCP/RCP configurations can be either ESCON or FICON.

About Compatible XRC Operations14

Figure 2 Channel Extender Connection Configuration for Compatible XRC

Interoperability with Other Products and Functions

HP Compatible XRC supports concurrent operations with other copy functions. Table 2 on page 15 indicates whether XRC can share volumes with other copy functions.

Table 2 Volume Sharing between XRC and Other Copy Functions

XRC

P-VOL

XRC

S-VOL

TrueCopy

M-VOL

True

Copy

ShadowImage

M-VOL

ShadowImage

R-VOL

XRC

P-VOL

XRC

S-VOL

Note 1:

Yes

—

Yes

(see

Note

(see

Note

)

An S-VOL of XRC cannot be used as an XRC P-VOL within the same XRC session, but it can

(see

Yes

Note

)

(see

Yes

Note 3

)

be used as an XRC P-VOL in another XRC session.

Note 2:

Note 3:

It cannot be used as a TrueCopy Asynchronous M-VOL at the same time.

When the XRC P-VOL and the ShadowImage M-VOL are the same volume, you cannot use

the Reverse Copy and Quick Restore commands of ShadowImage.

R-VOL

FlashCopy

Mirror

M-VOL

FlashCopy

MirrorR-VOL

NoYesNo

NoYesNoYesNoYes—

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 15

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