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.

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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

Using Two Compatible XRC Pairs in Conjunction

By using two HP Compatible XRC pairs in conjunction, you can maintain three copies of data between secondary sites for disaster recovery purposes. Figure 3 on page 16 shows the configuration in which two XRC operations are performed: Data is copied from the primary site to the first secondary site using XRC; then, it is copied from the first secondary site to the second one using XRC.

Figure 3 Double Compatible XRCs

Using Compatible XRC in Conjunction with TrueCopy

HP Compatible XRC can be used in conjunction with TrueCopy to maintain three copies of critical data at your primary and/or secondary sites for disaster recovery purposes.

• Configuration in which a volume is functioning as XRC P-VOL and TrueCopy M-VOL Figure 4 on page 16 shows the configuration in which a volume is functioning as both a Compatible

XRC P-VOL and a TrueCopy M-VOL. In this configuration, data is copied from the primary site to the first secondary site using TrueCopy, and it is copied from the primary site to the second secondary site using XRC.

Figure 4 Configuration with Volume Functioning as Compatible XRC P-VOL and TrueCopy M-VOL

• Configuration in which a volume is functioning as XRC S-VOL and TrueCopy M-VOL. Figure 5 on page 17 shows a configuration in which a volume is functioning as both an XRC

S-VOL and a TrueCopy M-VOL. In this configuration, data is copied from the primary site to the first secondary site using XRC, and it is copied from the first secondary site to the second secondary site using TrueCopy.

About Compatible XRC Operations16

Figure 5 Configuration with Volume Functioning as Compatible XRC S-VOL and TrueCopy M-VOL

Using Compatible XRC in Conjunction with ShadowImage

XRC can be used in conjunction with ShadowImage to maintain data in the secondary site and the primary site for disaster recovery and data migration purposes.

• Configuration in which a volume is functioning as XRC P-VOL and ShadowImage S-VOL Figure 6 on page 17 shows the configuration in which a volume is functioning as both an XRC

P-VOL and a ShadowImage S-VOL. In this configuration, data is copied within the primary site using ShadowImage, and it is copied from the primary site to the secondary site using XRC.

Figure 6 Configuration with Volume Functioning as Compatible XRC P-VOL and ShadowImage S-VOL

• Configuration in which a volume is functioning as XRC S-VOL and ShadowImage S-VOL Figure 7 on page 18 shows the configuration in which a volume is functioning as both an XRC

S-VOL (secondary volume) and a ShadowImage S-VOL (source volume). In this configuration, data is copied from the primary site to the secondary site using XRC, and then it is copied within the secondary site using ShadowImage.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 17

Figure 7 Configuration with Volume Functioning as Compatible XRC S-VOL and ShadowImage S-VOL

• Configuration in which one volume is functioning as XRC P-VOL and ShadowImage S-VOL, and

another volume is functioning as XRC S-VOL and ShadowImage S-VOL

Figure 8 on page 18 shows the configuration in which one volume is functioning as both an XRC

P-VOL and a ShadowImage S-VOL (source volume) and another volume is functioning as both an XRC S-VOL (secondary volume) and a ShadowImage S-VOL (source volume). In this configuration, data is copied within the primary site using ShadowImage, and it is copied from the primary site to the secondary site using XRC. Afterward, it is copied within the secondary site using ShadowImage.

Figure 8 Configuration with One Volume Used as Compatible XRC P-VOL Another as S-VOL

Using Compatible XRC in Conjunction with FlashCopy Mirror

XRC can be used in conjunction with FlashCopy Mirroring to maintain data in the secondary site and the primary site for disaster recovery and data migration purposes.

• Configuration in which a volume is functioning as XRC P-VOL and FlashCopy Mirroring S-VOL Figure 9 on page 19 shows the configuration in which a volume is functioning as both an XRC

P-VOL and a FlashCopy Mirroring S-VOL. In this configuration, data is copied within the primary site using FlashCopy Mirroring, and it is copied from the primary site to the secondary site using XRC.

About Compatible XRC Operations18

Figure 9 Configuration with Volume Functioning as Compatible XRC P-VOL and FlashCopy Mirroring S-VOL

• Configuration in which a volume is functioning as XRC S-VOL and FlashCopy Mirroring S-VOL Figure 10 on page 19 shows the configuration in which a volume is functioning as both an XRC

S-VOL (secondary volume) and a FlashCopy Mirroring S-VOL (source volume). In this configuration, data is copied from the primary site to the secondary site using XRC, and it is copied within the secondary site using FlashCopy Mirroring.

Figure 10 Configuration with Volume Functioning as Compatible XRC S-VOL and FlashCopy Mirroring S-VOL

• Configuration in which one volume is functioning as XRC P-VOL and FlashCopy Mirroring S-VOL,

and another volume is functioning as XRC S-VOL and FlashCopy Mirroring S-VOL

Figure 11 on page 20 shows the configuration in which one volume is functioning as both an XRC

P-VOL and a FlashCopy Mirroring S-VOL, and another volume is functioning as both an XRC S-VOL and a FlashCopy Mirroring S-VOL. In this configuration, data is copied within the primary site using FlashCopy Mirroring, and then it is copied within the secondary site using FlashCopy Mirroring.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 19

Figure 11 Configuration with One Volume Used as P-VOL and Another Volume Used as S-VOL

About Compatible XRC Operations20

3 Preparing for Compatible XRC Operations

This chapter outlines all the components that are required for XRC operations.

• System Requirements

• Requirements and Restrictions for Using Compatible XRC

• Installing the Compatible XRC Software

System Requirements

HP Compatible XRC operations at the primary site require hosts and XP24000/XP20000 Disk Array storage systems. Operations at the secondary site require a secondary storage system (or storage systems) that must have the capability of supporting the XRC workload. Additionally, a XP Remote Web Console PC and the XRC program product are required. The XRC system requirements include the following:

• Primary host

If the system in 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.

• Secondary host

The secondary host requires System Data Mover (SDM), which is host software, for remote copy operations.

• Primary storage systems

The HP Compatible XRC program product needs to be installed in the XP24000/XP20000 Disk Array storage system.

Note:

When the DKC emulation type is 3990-6 or 3990-6E, you are able to use XRC even if the

program product is not installed. In such a case, however, XRC supports only the XRC2 feature (for details, see“Supported Functions” on page 22). When the DKC emulation type is 2105 or 2107, the XRC program product needs to be installed.

• Secondary storage systems

The XP24000/XP20000 Disk Array storage system is required.

Note:

The installation of the HP Compatible XRC program product is not required for the secondary

storage system.

• Communication path connection

• If ESCON is used for connection, the maximum possible distance between the primary storage

system and the secondary host is 3 km.

• If the director (Ultranet) is used for connection, the maximum possible distance between the

primary storage system and the secondary host is 20 km.

• If the director (Ultranet) and repeater are used for connection, the maximum possible distance

between the primary storage system and the secondary host is 40 km.

• If the channel extender is used for connection, no restriction is applied to the distance between

the primary storage system and the secondary host.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 21

Note:

The following channel extender is supported. Channel extender: CNT Ultranet Storage

Director (ATM, IP connections). Line type: ATM lines (Up to 135 Mbps), IP lines (500 Mbps).

• XP Remote Web Console PC

• You must have a XP Remote Web Console PC at the primary site. To use the XP24000/XP20000

Disk Array Remote Web Console Java application programs, including XRC, you must have an Internet browser. A license key code is also required for using the HP Compatible XRC program product. For details on how to install and use a XP Remote Web Console PC, please refer to the HP StorageWorks XP24000/XP20000 Remote Web Console User's Guide.

Requirements and Restrictions for Using Compatible XRC

Initial installation of the Universal Replicator hardware is performed by the user and the HP representative. To install the hardware required for Universal Replicator operations:

User: Identify the locations of the URz primary and secondary data volumes (primary data volumes and secondary data volumes), so that the URz hardware can be installed and configured properly. The following sections provide several tables of information to consider when using Compatible XRC.

Supported Functions

Table 3 on page 22 indicates the supported XRC features in IBM XRC functions (XRC2 and XRC3).

Table 3 Features Supported by Compatible XRC

DEV blocking

Unplanned outage

CNT MULTI path

Suspend on Long Busy

Write Pacing

CNT extender (Ultranet Storage Director).

Only Fix of Utility DEV is supported (Float is not supported).

Sidefile threshold tuning feature for each volume

Differential copy feature for unplanned outage achieved by the differential bit management in the storage system

Alternate path retry feature for CNT USD*1 connections

Suspend setting feature which does not report SCP from SDM

Function to set arbitrary Sleep Time from SDM when the amount of write data is controlled

Not supportedFix or Float of Utility DEV setting featureFix utility

Not supported

XRC3XRC2DescriptionFeature

SupportedSupported

SupportedNot supported

Supported

Supported *

Operates when Level 2 Suspend is set to Disabled in the option of Compatible XRC. Level 2

Suspend operation will be processed preferentially, when Level 2 Suspend is set to Enable.

Operates when Block Option is set to Volume Level in the option of Compatible XRC. Write Pacing

will not operate when Block Option is set to Cache Level.

Preparing for Compatible XRC Operations22

Note:

When the DKC emulation type is 2105 or 2107, XRC2 or XRC3 is supported.

When the DKC emulation type is 3990-6 or 3990-6E, only the XRC2 function is supported.

Number of Sessions

Table 4 on page 23 shows the number of sessions in Compatible XRC.

Table 4 Number of HP Compatible XRC Sessions

The number of Concurrent Copy (CC) and XRC sessions per volume depends on the combination of CC and XRC (XRC2 and XRC3). The number of sessions per volume is shown in Table 5 on page 23.

Table 5 Number of Sessions per Volume

Number of SessionsUnit

Number of CUs × 64Per disk storage system

64Per CU

1Per volume

DKU Emulation TypeSession Type

3390-1, 3390-2, 3390-3, 3390-3R, 3390-9, 3390-L, 3390-M

Performance Considerations

Please note the following when performing XRC operations.

• HP recommends that you have one ESCON path for one SC session.

• Take the block sizes into consideration when configuring the SC sessions (do not issue too many

write I/Os with large blocks to one SC session).

The performance of XRC is affected by the performance of SDM. Please tune the SDM in order to achieve the desired performance. For SDM tuning, please refer to RedBook's Implementing ESS Copy Services on S/390 published by IBM, or contact IBM.

Notes and Questions

This section provides several tables of system information useful when performing HP Compatible XRC operations. This section also provides some additional considerations to be observed regarding Compatible XRC.

Number of CC Sessions

Number of HP Compatible XRC

Sessions

—16CC only

115CC and XRC2

115CC and XRC3

• Additional cache requirement

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 23

• XRC operations, as well as TrueCopy Asynchronous for Mainframe operations, utilize additional cache to store the sidefile queue of asynchronous record sets.

• If you are maintaining XRC pairs and TrueCopy Asynchronous pairs, please consider asynchronous remote copy workloads, and then make sure that your XP24000/XP20000 Disk Array storage systems have adequate cache installed and available.

• RESUME operation messages

If the ANTX5123W console message is displayed during the RESUME operation for XRC pairs, the operation might be unsuccessful. In this case, you must perform the XDELPAIR operation to delete the pairs, and then perform the XADDPAIR operation to create the pairs again.

• XADDPAIR operation messages

If the ANTA5107E (RC=9014, REAS=604 or REAS=608) console message is displayed during the XADDPAIR operation, the XRC program product may not be installed. Check whether the XRC program product is installed. If the XRC program product is not installed, please install it.

• FICON host interface path considerations

• If XRC is used with FICON host interface, you must be careful about the path combination with serial channel (ESCON). Table 6 on page 24 lists possible combinations of paths between the primary host and the primary storage system and paths between the primary storage system and the secondary host. Refer to Table 6 on page 24 when you use FICON.

Table 6 Combinations of ESCON and FICON Paths

Paths between Primary

Host and Primary storage

system

FICON (see

Note

)

FICON (see

Note

)

storage system and

Secondary Host

SupportedESCONESCON

FICONESCON

Not recommendedESCON

SupportedFICON

SupportPaths between Primary

• Since FICON achieves faster transfer speed than ESCON, you need to consider the difference in performance between FICON and ESCON paths. If FICON is used for the connection between the primary host and the primary storage system, using ESCON for connecting the primary storage system and the secondary host is not recommended. In this case, use FICON instead.

• USP Operation modes and options settings

• The operation modes of Compatible XRC in conventional models and the corresponding option settings in the XP24000/XP20000 Disk Array storage systems are show in Table 7 on page 25. Conventional operation mode setting of Compatible XRC in the XP24000/XP20000 Disk Array storage systems are disabled. Therefore, execute the setting that alternates the conventional

Preparing for Compatible XRC Operations24

operation mode setting of Compatible XRC in the Change Option dialog box (see

Figure 13 on page 33).

Table 7 HP Compatible XRC in Conventional Models and XP24000/XP20000 Disk Arrays

Operation Modes of HP Compatible XRC in

Conventional Model

Option Settings of XRC in

XP24000/XP20000 Disk Array

storage systems

118989786856145

• Block Option: Cache Level

• Do not Block (Volume Level): Disable

—————OffOff

• Level 1 Sleep: Enable

• Block Option: Cache Level

• Do not Block (Volume Level): Enable

—————OnOff

• Level 1 Sleep: Enable (see

• Block Option: Cache Level

• Do not Block (Volume Level): Disable

—————OffOn

• Level 1 Sleep: Disable

• Block Option: Volume Level

• Do not Block (Volume Level): Enable

—————OnOn

• Level 1 Sleep: Disable

Level 2 Threshold: 50%———OffOff——

Level 2 Threshold: 60%———OnOff——

Note

)

Level 2 Threshold: 40%———OffOn——

Level 2 Threshold: 70%———OnOn——

Sleep Time: 100 ms——Off————

Sleep Time: 10 ms——On————

Level 2 Suspend: Disable—Off—————

Level 2 Suspend: Enable—On—————

—————

Note

: Level 1 Sleep is performed on a volume in which a threshold specified by SDM is

Level 1 SIM: DisableOff—

Level 1 SIM: EnableOn——————

enabled (Block option). Level 1 Sleep is not performed on the volume for which Do not Block (Volume Level) is specified.

• The behavior of the XP24000/XP20000 Disk Array storage systems, that are affected by

option settings in the Change Option dialog box (Figure 13 on page 33), is also affected by

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 25

whether the Do not Block parameter of the XADDPAIR command of SDM is specified. For details, see Table 8 on page 26 and Table 9 on page 27.

Table 8 Behavior of the Storage System - Block Option of Compatible XRC is Set to Volume Level

Behavior of the XP24000/XP20000 Disk Array storage systemsOption Settings in

Compatible XRC

Do not Block (Volume Level)

Level 1 Sleep

Level 1 SIM

SettingsOptions

Enable

Disable (see

Note

Enable (see

Note

Disable

Enable

Disable

If "Do not Block" is Specified by

SDM

The storage system does not control the amount of data to be written to the specified volume.

)

The storage system does not perform Sleep - Wait command retry.

The storage system does not report an SIM to the host when the usage of sidefile exceeds the sleep wait threshold.

If "Do not Block" is Not Specified by

SDM (for example, If "Block" is

Specified)

According to the amount of used sidefile capacity, the storage system performs Sleep - Wait command retry when the threshold specified by SDM is exceeded.

——

According to the amount of used sidefile capacity, the storage system performs Sleep - Wait command retry when the threshold specified by SDM is exceeded.

The storage system reports an SIM to the host when the usage of sidefile exceeds the sleep wait threshold.

The storage system does not report an SIM to the host when the usage of sidefile exceeds the sleep wait threshold.

Level 2 Suspend

Preparing for Compatible XRC Operations26

Enable

Note

(see

Disable

)

Even when the amount of used sidefile capacity exceeds the level-2 threshold, level-2 suspension does not occur and the storage system does not report SCP-SCI to the host.

——

Even when the amount of used sidefile capacity exceeds the level-2 threshold, level-2 suspension does not occur and the storage system does not report SCP-SCI to the host.

Note:

You cannot use this setting when the block option of XRC is set to Volume Level.

Table 9 Behavior of the Storage System - Block Option of Compatible XRC is Set to Cache Level

Behavior of XP24000/XP20000 Disk Array storage systemsOption Settings in

Compatible XRC

Do not Block (Volume Level)

Level 1 Sleep

SettingsOptions

Enable

Disable

Enable

Disable

If Do not Block is Specified by

SDM

The storage system does not control the amount of data to be written to the specified volume.

The storage system controls the amount of data to be written. To control the amount, the storage system uses the threshold specified by the Level 2 Threshold drop-down list.

If Do not Block (Volume Level) is enabled, the storage system does not perform Sleep - Wait command retry.

If Do not Block (Volume Level) is disabled, the storage system performs Sleep - Wait command retry.

The storage system does not perform Sleep - Wait command retry.

If Do not Block is Not Specified by

SDM (for example, If Block is

Specified by SDM)

The storage system controls the amount of data to be written. To control the amount, the storage system uses the threshold specified by the Level 2 Threshold drop-down list.

The storage system performs Sleep Wait command retry.

The storage system does not perform Sleep - Wait command retry.

Level 1 SIM

Enable

Disable

If Do not Block (Volume Level) is enabled, the storage system does not report an SIM to the host when the amount of used sidefile capacity exceeds the Sleep - Wait threshold.

If Do not Block (Volume Level) is disabled but Level 1 Sleep is enabled, the storage system reports a SIM that indicates the amount of used sidefile capacity exceeds the Sleep - Wait threshold to the host.

If Do not Block (Volume Level) is disabled and Level 1 Sleep is disabled, the storage system does not report an SIM to the host when the amount of used sidefile capacity exceeds the Sleep - Wait threshold.

The storage system does not report an SIM to the host when the amount of used sidefile capacity exceeds the sleep wait threshold.

If Level 1 Sleep is enabled, the storage system reports an SIM to the host when the amount of used sidefile capacity exceeds the Sleep - Wait threshold.

If Level 1 Sleep is disabled, the storage system does not report an SIM to the host when the amount of used sidefile capacity exceeds the Sleep - Wait threshold.

The storage system does not report an SIM to the host when the amount of used sidefile capacity exceeds the sleep wait threshold.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 27

Compatible XRC

Behavior of XP24000/XP20000 Disk Array storage systemsOption Settings in

Level 2 Suspend

SettingsOptions

Enable

Disable

If Do not Block is Specified by

SDM

If Do not Block (Volume Level) is enabled, level-2 suspension does not occur when the amount of used sidefile capacity exceeds the level-2 threshold. Also, the storage system does not report SCP-SCI to the host.

If Do not Block (Volume Level) is disabled, level-2 suspension occurs when the amount of used sidefile capacity exceeds the level-2 threshold.

If Do not Block (Volume Level) is disabled, level-2 suspension does not occur when the amount of used sidefile capacity exceeds the level-2 threshold. The storage system reports SCP-SCI to the host.

If Do not Block is Not Specified by

SDM (for example, If Block is

Specified by SDM)

Level-2 suspension occurs when the amount of used sidefile capacity exceeds the level-2 threshold.

When the amount of used sidefile capacity exceeds the level-2 threshold, level-2 suspension does not occur. The storage system reports SCP-SCI to the host.

• HP Compatible XRC and multiple CLPR use

If you want to use XRC and more than one CLPR (cache logical partition), it is recommended that you use storage control (SC) sessions in the same CLPR. XRC options can be set to each CLPR. If an SC session extends over more than one CLPR, the storage system operation depends on the XRC option setting for each CLPR. For example, if more than one session exists in one CLPR and then the amount of used sidefile capacity in the CLPR reaches level 2 (if the Level 2 Suspend option of XRC is enabled) or level 3, the session that occupies the largest capacity in the sidefile in the cache is suspended.

• Using a drive in which its DKU emulation type is 3390-M

When using a drive in which its DKU emulation type is 3390-M as a P-VOL or an S-VOL, patch the System Data Mover (SDM), which is host software of the secondary site, with the following PTF (program temporary fixes):

[PTF] UA18053: SUPPORT XRC VOLUME SIZE UP TO 65520 CYL

Drives in which the DKU emulation type is 3390-M cannot be used as P-VOLs or as S-VOLs in XRC operations if the program temporary fixes (PTF) is not patched to the SDM.

• Performing an offline micro program replacement

The storage control (SC) session of the storage system is terminated automatically when offline replacement of a micro program, which requires PS OFF and PS ON (or PS ON after the battery has discharged (volatile PS ON)), is performed while XRC is operating. The session of the system data mover (SDM) side of the secondary site is suspended by the termination and the RESUME operation may fail. To avoid these issues, perform the following operations:

Preparing for Compatible XRC Operations28

• When performing an offline micro program replacement, delete all XRC pairs by XDELPAIR command before PS OFF, and then create all pairs again by XADDPAIR command after PS ON.

• When performing volatile PS ON, delete all XRC pairs by XDELPAIR command immediately after PS ON, and then create all pairs again by XADDPAIR command.

Caution:

• When pair volumes are suspended by XSUSPEND TSO command

• When pair volumes are suspended by some failure

Before executing the RESUME operation, always check that the sidefile of the Compatible XRC pairs does not exist in the cache. If it does exist, it may cause a timeout error.

Caution:

XRC exists on the cache. Time out error may occur with the following message being displayed.

ANTX5124W I/O REQUEST FOR DEVICE device_number STORAGE CONTROL ssid SESSION session_number HAS TIMED OUT, FUNC= function_code ANTX5150E XRC SESSION(session_id) HAS STALLED, REASON=reason

Execute Delete operation after confirming that sidefiles do not exist on the cache (number of sidefiles=0) by the XQUERY TSO command or SCDATA operation.

In case of timeout error, pair information managed by SDM and DKC may not match (pair status managed by SDM side, which XDELPAIR is executed, is deleted but session may remain on DKC in some cases). Therefore, check whether the session is remaining by the LISTSESS command. If the session is remaining, terminate the session by the TERMSESS command.

After the termination of the session, when the XADDPAIR command is executed, the ANTA5107E message (RC=608) may appear. If this occurs, the XADDPAIR command may fail. Re- execute the XADDPAIR command again if this occurs.

Do not execute the RESUME operation during the following conditions:

Do not try to delete Compatible XRC pairs when a large number of sidefiles of Compatible

Caution:

type is 3990-6 and 3990-6E. Therefore, an error will occur with ANTA5107E message (RC=4130) when the WRITE PACING operation is executed using the XADDPAIR command to a Compatible XRC pair that has 3990-6 or 3990-6E as the DKC emulation type.

SDM pair status will be deleted but the session may remain on DKC in such cases. Therefore, check whether the session is remaining by LISTSESS command. If the session is remaining, terminate the session by TERMSESS command.

In Compatible XRC, WRITE PACING function is not supported when the DKC emulation

Installing the Compatible XRC Software

The HP Compatible XRC program product must be installed on the XP24000/XP20000 Disk Array storage systems in the primary site.

For detailed information about how to install XRC, please refer to the HP StorageWorks XP24000/XP20000 Remote Web Console User's Guide.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 29

Preparing for Compatible XRC Operations30

4 Performing Compatible XRC Operations

This chapter introduces the XRC windows and it explains how to prepare your system and how to perform XRC operations.

• Starting Compatible XRC

• Using the Compatible XRC GUI

• Setting Compatible XRC Options

• Changing Settings in the Preview List

• Deleting Settings from the Preview List

Starting Compatible XRC

When using the XP Remote Web Console computer and logging in to the XP24000/XP20000 Disk Array storage system, the XP Remote Web Console main window appears. Use the XP Remote Web Console main window to open the Compatible XRC window.

To open the Compatible XRC window:

1. Enter the URL of the SVP into the Internet browser to access the SVP.

2. Select the XP24000/XP20000 Disk Array storage system that you want to log in.

3. Enter the user ID and the password and then select OK. The XP Remote Web Console main

window appears.

In the XP Remote Web Console main window, select the Mainframe Connection button ( ), and then select the XRC tab.

Note

: When you display the XP Remote Web Console main window for the first time, the window

is in View mode. To perform HP Compatible XRC operations, you must ensure that the window is in Modify mode. For detailed information about how to change the mode to modify, please refer to the HP StorageWorks XP24000/XP20000 Remote Web Console User's Guide.

Note

: For detailed information about how to install and use XP Remote Web Console PCs and XP Remote Web Console, please refer to the HP StorageWorks XP24000/XP20000 Remote Web Console User's Guide.

To end XRC operations, select the Close button ( ).

Using the Compatible XRC GUI

This section explains the windows that you use when performing XRC operations.

Compatible XRC Window

When you open the Compatible XRC window (see Figure 12 on page 32), the XRC option list is displayed.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 31

Figure 12 Compatible XRC Window

The Compatible XRC window displays the following items:

• XRC option list (at the upper portion in the window)

• CLPR

Displays the CLPR number

• LV2 THD Displays the threshold specified in Level 2 Threshold in the Change Option dialog box (see

Figure 13 on page 33)

• Block Option Displays the setting that is made in Block Option in the Change Option dialog box (see

Figure 13 on page 33)

• Do not Block (Vol LV) Displays the setting that is made in Do not Block (Volume Level) in the Change Option dialog

box (see Figure 13 on page 33)

• LV1 Sleep Displays the setting that is made in Level 1 Sleep in the Change Option dialog box (see

Figure 13 on page 33)

• Sleep Time Displays the time specified in Sleep Time in the Change Option dialog box (see

Figure 13 on page 33)

• LV1 SIM Displays the setting that is made in Level 1 SIM in the Change Option dialog box (see

Figure 13 on page 33)

Performing Compatible XRC Operations32

• LV2 Suspend Displays the setting that is made in Level 2 Suspend in the Change Option dialog box (see

Figure 13 on page 33)

• Preview list

Displays settings made in the Change Option window (see Figure 13 on page 33). The settings displayed in the Preview list are not applied to the storage system. After you click the Apply button in the Compatible XRC window (see Figure 12 on page 32), the settings in the Preview list are applied to the storage system. For detailed information about the Preview list, see “Change Option Dialog” on page 33.

• Apply

Clicking Apply assigns the settings in the Preview list to the storage system. After the settings are applied successfully, the Preview list is cleared.

• Cancel

Cancels all settings in the Preview list

Change Option Dialog

The Change Option dialog box (see Figure 13 on page 33) appears when you select and right-click a setting in the XRC option list in the Compatible XRC window, then select Change Option from the pop-up menu.

Figure 13 Change Option Dialog Box

The Change Option dialog box enables you to make settings on the following options:

• CLPR drop-down list

Use to select the number of the CLPR for which you want to specify options.

• The same setting is applied check box.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 33

If this check box is selected, options are set to all the selected CLPRs. If this check box is cleared, options are only set to the CLPR selected in the drop-down list.

• Level 2 Threshold drop-down list

Use to select the threshold for the sidefile for reporting SCP-SCI. This threshold is called the SCP-SCI reporting threshold or the level-2 threshold.

Note:

SCP is an acronym for State Change Pending. SCI is an acronym for State Change Interrupt.

The level-2 threshold must be within the range of 30 to 70 percent and must be a multiple of 10 percent (for example, 30, 40, 50, 60, or 70 percent). The default is 50 percent.

Caution:

TrueCopy Asynchronous for Mainframe, TrueCopy Asynchronous for Mainframe, or Concurrent Copy. Keep in mind that the level-2 threshold for Compatible XRC and the SCP-SCI reporting threshold for TrueCopy Asynchronous for Mainframe, TrueCopy Asynchronous for Mainframe, or Concurrent Copy affect each other.

Note:

the level-3 threshold, add 10 percent to the level-2 threshold.

• Block Option

Use to set the IBM-compatibility mode for the device blocking function, or to control the amount of write data according to sidefile capacity:

• Volume Level radial button

The level-2 threshold is set to the area in which the SCP-SCI reporting threshold for

To calculate the level-1 threshold, subtract 10 percent from the level-2 threshold. To calculate

The Volume Level radial button sets IBM-compatibility mode for the device blocking function. Write I/Os to volumes are put in a sleep-wait status by executing the command. If you reissue the command, the write I/Os will restart. The amount of write data may exceed the threshold for the number of record sets per volume. The threshold is specified by SDM and the default threshold is 0x500.

Note:

If the Volume Level radial button is selected, Do not Block (Volume Level) is set to Enable.

Also, Level 1 Sleep and Level 2 Suspend are set to Disable.

• Cache Level radial button

Depending on the sidefile capacity, the storage system performs one of the following three levels of control of the amount of write data (see Figure 14 on page 35).

Note:

If the Cache Level radial button is selected, and Cache Level is set, the IBM system data

mover (SDM) function will not work.

• Level 1

This level of control is performed when the sidefile capacity is equal to or larger than the level-1 threshold, and is smaller than the level-2 threshold.

If Level 1 Sleep is set to Enable, write I/Os to volumes are put in a wait status by command retry when the sleep wait threshold (for example, level-1 threshold) is exceeded.

If Level 1 Sleep is set to Disable, write I/Os to volumes will not be put in a wait status.

• Level 2

This level of control is performed when the sidefile capacity is equal to or larger than the level-2 threshold, and is smaller than the level-3 threshold.

If Level 2 Suspend is set to Disable, write I/Os to volumes are put in a wait status by SCP-SCI reporting when the SCP-SCI reporting threshold (for example, level-2 threshold) is exceeded.

If Level 2 Suspend is set to Enable, the storage system will not report SCP-SCI to hosts. Sidefile puncture will occur and the target session will be suspended.

Note:

Sidefile puncture is the sidefile threshold plus 10%.

• Level 3

Performing Compatible XRC Operations34

This level of control is performed when the sidefile capacity is equal to or larger than the level-3 threshold.

Sidefile puncture can occur. The session for the sidefile, containing the maximum capacity in the cache in the CLPR, is suspended.

Figure 14 Controlling the Amount of Write Data

• Do not Block (Volume Level)

Use to specify whether the storage system should control the amount of data to be written to the specified volume:

• Enable radial button

The storage system will not control the amount of data to be written to the specified volume. Therefore, write I/Os from hosts is not put in a wait status.

Note

: Do not Block (Volume Level) is always set to Enable when Block Option is set to Volume

Level.

• Disable radial button

Depending on the sidefile capacity, the storage system will perform one of the following four levels of control of the amount of write data (see Figure 14 on page 35).

• Level 0

This level of control is performed when the sidefile capacity is smaller than the level-1 threshold. If Level 1 Sleep is set to Enable, write I/Os to volumes are put in a wait status according to the

threshold for the number of record sets per volume; the threshold is specified by SDM, and the default threshold is 0x500.

If Level 1 Sleep is set to Disable, write I/Os to volumes will not be put in a wait status.

• Level 1

This level of control is performed when the sidefile capacity is equal to or larger than the level-1 threshold, and is smaller than the level-2 threshold.

Write I/Os to volumes are put in a wait status by command retry when the sleep wait threshold (for example, level-1 threshold) is exceeded.

• Level 2

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 35

This level of control is performed when the sidefile capacity is equal to or larger than the level-2 threshold, and is smaller than the level-3 threshold.

Write I/Os to volumes are put in a wait status by SCP-SCI reporting when the SCP-SCI reporting threshold (for example, level-2 threshold) is exceeded.

• Level 3 This level of control is performed when the sidefile capacity is equal to or larger than the level-3

threshold.

Note:

Sidefile puncture will occur. (The puncture threshold is the sidefile threshold plus 10%.)

Figure 15 Controlling the Amount of Write Data (2)

• Level 1 Sleep

Use to specify whether the storage system should perform Sleep - Wait command retry when the sidefile threshold exceeds the sleep wait threshold (for example, the level-1 threshold).

• Enable radial button

The storage system performs a Sleep - Wait command retry.

• Disable radial button

The storage system will not perform the Sleep - Wait command retry.

Note

: Level 1 Sleep is always set to Disable when Block Option is set to Volume Level.

• Sleep Time

Use to specify the sleep wait time for Sleep - Wait command retry.

• 10ms

The storage system waits 10 milliseconds.

• 100ms

The storage system waits 100 milliseconds.

• Level 1 SIM

Use to specify whether the storage system should report a SIM (service information message) to the host when the sidefile threshold exceeds the sleep wait threshold (for example, the level-1 threshold).

Performing Compatible XRC Operations36

• Enable radial button

A SIM indicating that the sidefile exceeds the sleep wait threshold is reported to the host.

• Disable radial button

A SIM is not reported to the host, even when the sidefile exceeds the sleep wait threshold.

• Level 2 Suspend

Use to specify whether the storage system should report SCP-SCI to the host when the sidefile threshold exceeds the SCP-SCI reporting threshold (for example, the level-2 threshold).

• Enable radial button

The storage system will not report SCP-SCI to the host. Sidefile puncture occurs and the target session is suspended.

• Disable radial button

The storage system reports SCP-SCI to the host. After the host receives SCP from the storage system, the host is unable to issue write I/Os until the host receives SCI.

Note:

Level 2 Suspend is always set to Disable when Block Option is set to Volume Level.

• OK button

Confirms the XRC option settings and closes the Change Option dialog box (see

Figure 13 on page 33). The option settings are displayed in the Preview list of the Compatible

XRCwindow (see Figure 12 on page 32). The option settings are displayed in blue, bold and italics in the XRC option list.

• Cancel button

Cancels the XRC option settings

• Default button

• Changes the XRC option settings to the default status

Setting Compatible XRC Options

To set HP Compatible XRC options:

1. From the XRC option list in the Compatible XRC window (see Figure 12 on page 32), select and

right-click the CLPR on which you want to make option settings. A pop-up menu appears.

Note:

You can select one or more CLPRs.

2. From the pop-up menu, select Change Option.

The Change Option dialog box appears (see Figure 13 on page 33).

3. In the Change Option dialog box (see Figure 13 on page 33), set XRC options.

Note:

If you select The same setting is applied check box, option settings is used for all the

selected CLPRs. If you select the check box, a confirmation dialog box also appears and informs you that the option settings are applied to all the selected CLPRs (see Figure 16 on page 37). To continue the operation, select OK.

Figure 16 Confirm Dialog Box Displayed After Selecting Check Box

4. When you finish setting Compatible XRC options, select OK.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 37

The Change Option dialog box closes (see Figure 13 on page 33). The option settings are displayed in the Preview list of the Compatible XRC window (see Figure 12 on page 32). The option settings are displayed in blue, bold and italics in the XRC option list.

5. Select Apply.

Depending on your settings, a confirmation dialog box may appear and inform you that a pair is suspended (see Figure 17 on page 38).

Figure 17 Confirmation Dialog Box Indicates that a Pair is Suspended

6. To continue the operation, select OK.

A confirmation dialog box appears and asks you whether you want to apply the option settings to the storage system (see Figure 18 on page 38).

Figure 18 Confirmation Dialog Box Asking to Apply Settings to the Storage System

7. To apply the settings, select OK.

The settings are applied to the storage system, and then a dialog box appears and informs you that the operation is finished (see Figure 19 on page 38).

Figure 19 Dialog Box Indicates that the Operation is Finished

8. Select OK.

The settings are reflected in the XRC option list in the Compatible XRC window. The operation for setting XRC options is finished.

Changing Settings in the Preview List

To change a setting in the Preview list in the Compatible XRC window:

1. From the Preview list in the Compatible XRC window (see Figure 12 on page 32), select and

right-click the CLPR on which you want to change option settings. A pop-up menu appears.

2. From the pop-up menu, select Modify.

The Change Option dialog box appears (see Figure 13 on page 33).

3. In the Change Option dialog box (see Figure 13 on page 33), change Compatible XRC options.

4. When you finish setting XRC options, select OK.

The Change Option dialog box closes (see Figure 13 on page 33). The resulting option setting is displayed in the Preview list of the Compatible XRC window (see Figure 12 on page 32).

The operation for changing a setting in the Preview list is finished.

Deleting Settings from the Preview List

To delete a setting from the Preview list in the Compatible XRC window:

Performing Compatible XRC Operations38

1. From the Preview list in the Compatible XRC window (see Figure 12 on page 32), select and

right-click the CLPR on which you want to delete option settings. A pop-up menu appears.

2. From the pop-up menu, select Delete.

A confirmation dialog box appears and informs you that the setting will be deleted from the

Preview list (see Figure 20 on page 39).

Figure 20 Confirm Dialog Box Indicating that a Setting will be Deleted from the Preview List

3. To delete the setting, select OK.

The selected CLPR is deleted from the Preview list. The setting that has been displayed in blue, bold, and italics is displayed in original status (for example, not blue, not bold, and not italics).

The operation for deleting a setting from the Preview list is finished.

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 39

Performing Compatible XRC Operations40

5 Troubleshooting

This chapter provides troubleshooting information for Compatible Replication for IBM XRC and instructions for calling technical support.

• Troubleshooting

• Contacting HP Techincal Support

Troubleshooting

For detailed information about how to remove errors, see the following:

• For errors occurring during XRC operations, please refer to the HP StorageWorks

XP24000/XP20000 Remote Web Console Error Codes.

• For errors pertaining to the XP Remote Web Console, please refer to the HP StorageWorks

XP24000/XP20000 Remote Web Console User's Guide.

Contacting HP Technical Support

If you need to call HP technical support, be sure to provide as much information about the problem as possible; for example:

• Summarize the circumstances surrounding the error or failure.

• Provide the XP24000/XP20000 Disk Array Remote Web Console configuration information saved

in the floppy diskette(s) by the FD Dump Tool.

• Obtain the exact content of any messages displayed on the XP Remote Web Console PC.

• Provide the severity levels and reference codes of the DKC and DKU on the Status window of the

XP Remote Web Console main window.

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

http://www.hp.com/support

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 41

Troubleshooting42

A Acronyms and Abbreviations

Table 10 Acronyms and Abbreviations

AsynchronousAsync

RAID ManagerCCI

control unitCU

Enterprise System Connection (IBM trademark for optical channels)ESCON

host bus adapterHBA

input/outputI/O

International Business Machines CorporationIBM

local-area networkLAN

local control portLCP

light-emitting diodeLED

logical unit (also called device emulation or device type)LUN

megabits per secondMb/s

main control unitMCU

nonvolatile storageNVS

personal computer systemPC

printed circuit boardPCB

pair suspended-errorPSUE

pair suspended-splitPSUS

primary volumeP-VOL

redundant array of independent disksRAID

specific RAID architecturesRAID-1/-5

remote control portRCP

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 43

remote control unitRCU

remote IORIO

service information messageSIM

simplexSMPL

serial number (also abbreviated as s#)S/N

storage subsystem identificationSSID

secondary volumeS-VOL

service processorSVP

synchronoussync

serial number (also abbreviated as S/N)s#

volumeVOL

Acronyms and Abbreviations44

Index

Symbols

Compatible XRC

change option panel, 33 channel extenders, 14 Compatible XRC panel, 31 concurrent copy sessions, 23 installing software, 29 sharing volumes, 15 supported functions, 22 troubleshooting, 41 usage cautions, 23 using double pairs, 16 using TSO commands, 14

Additional cache, required, 24 Async

remote copy feature, 11 remote copy workloads, 24

Asynchronous

copy mode, 12

M-VOL, 15 ATM lines, 22 audience, 7

Commands

DFSMSdss, 12 donot block, 27 performs sleep-wait, 27 reverse copy and quick restore, 15 sleep-wait, 36 TSO, 14 xaddpair, 29 xdelpair, 29

Compatible XRC

overview of operations, 13

Compatible XRC Panel

opening, 31 Concurrent copy, 23 Concurrent copy, 34 Connection configuration, 14 Console message

anta5107e, 24

antx5123w, 24 Contacting

Calling HP technical support, 41 conventions

document, 8 Copy Functions

volume sharing, 15

Block

cache level, 25 option, 27, 32 sizes, 23

Cache logical partition, multiples, 28 Cache Level radial button, 34 Calculating thresholds, 34 Change option panel, 25, 33 Channel extenders, 14 Channel extenders, 21 CLPR number, 32 CNT extender, 22

XP24000/XP20000 for Compatible Extended Remote Copy (XRC) Software User's Guide 45

Data order, written, 14 Delete option settings, 39 Director and repeater, 21 Disaster recovery, 16, 16, 18 DKC emulation type, 21 DKC emulation type, 23 DKU emulation type, 28 DKU emulation type, 28 Do not block

option, 32 Do not block

spec by SDM, 26

vol level, 25 document

conventions, 8

HP XP for Compatible Extended Remote Copy Software Licenses User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

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

About this Guide

Intended Audience

Related Documentation

Document Conventions

Convention for Storage Capacity Values

Graphical Interface Illustrations

HP Technical Support

Subscription Service

HP Websites

Documentation Feedback

1 Overview of Compatible XRC

About Compatible Replication for IBM™ XRC (Compatible XRC)

Reviewing Other Supported Copy Features

TrueCopy

ShadowImage

FlashCopy Mirroring

2 About Compatible XRC Operations

Function Overview

Sessions

TSO Commands

Configuration

Interoperability with Other Products and Functions

Using Two Compatible XRC Pairs in Conjunction

Using Compatible XRC in Conjunction with TrueCopy

Using Compatible XRC in Conjunction with ShadowImage

Using Compatible XRC in Conjunction with FlashCopy Mirror

3 Preparing for Compatible XRC Operations

System Requirements

Requirements and Restrictions for Using Compatible XRC

Supported Functions

Number of Sessions

Performance Considerations

Notes and Questions

Installing the Compatible XRC Software

4 Performing Compatible XRC Operations

Starting Compatible XRC

Using the Compatible XRC GUI

Compatible XRC Window

Change Option Dialog

Setting Compatible XRC Options

Changing Settings in the Preview List

Deleting Settings from the Preview List

5 Troubleshooting

Troubleshooting

Contacting HP Technical Support

A Acronyms and Abbreviations

Index