Hp StorageWorks XP Remote Web Console Software Uživatelský manuál

HP StorageWorksContinuous Access XP Journal user guidePart number: T1723-96002Second edition: December 2005

10Firmware versionsThe recommended firmware versions shown in Table 1 provide the optimal level of support for the features provided with this product

Continuous Access XP Journal user guide 11IMPORTANT: Provides clarifying information or specific instructions.NOTE: Provides additional information.TI

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Continuous Access XP Journal user guide 131 Continuous Access XP JournalThis guide covers the following topics:• ”Overview of copy solutions” on page

14 Continuous Access XP JournalThis chapter describes and provides instructions for using the licensed Command View XP or XP Remote Web Console to per

Continuous Access XP Journal user guide 15reliable data replication systems using journal volumes to reduce the chances of copy operation suspensions.

16 Continuous Access XP Journalcommand is issued on the primary site. The primary disk array transfers data in the journal volume to the secondary sit

Continuous Access XP Journal user guide 17Figure 3 shows Continuous Access XP Journal’s connection configuration for multiple secondary disk arrays. B

18 Continuous Access XP Journaldisk array issues the read journal command to the primary disk array and copies journals. For Command View XP, the seco

Continuous Access XP Journal user guide 19communications path between the primary disk array and secondary disk array fails temporarily, remote copy o

Legal and notice information© Copyright 2005 Hewlett-Packard Development Company, L.P.Confidential computer software. Valid license from HP required f

20 Continuous Access XP JournalIf you add a journal volume when a remote copy operation is in progress (that is, when at least one data volume pair ex

Continuous Access XP Journal user guide 21Figure 4 shows the corresponding numbers of a consistency group and journal group.Figure 4 Corresponding con

22 Continuous Access XP JournalInitiator ports and RCU target portsInitiator and RCU target ports are required at the primary and secondary disk array

Continuous Access XP Journal user guide 23Remote copy operationsFigure 5 illustrates the types of Continuous Access XP Journal remote copy operations:

24 Continuous Access XP JournalNOTE: If you manipulate volumes (not journal groups) to create or resynchronize two or more data volume pairs within th

Continuous Access XP Journal user guide 25NOTE: To reduce the overhead associated with remote copy activities and maximize data transfer, the local di

26 Continuous Access XP JournalThe journal sequence number indicates the primary data volume write sequence that the primary disk array created for ea

Continuous Access XP Journal user guide 27not arrived yet. The management information of journal data S2 is 0. The secondary disk array waits for jour

28 Continuous Access XP Journal• Cache overflow watch: If journal cache remains full for the time period specified by the cache overflow watch paramet

Continuous Access XP Journal user guide 29primary disk array or secondary disk array changes the status of the primary and secondary data volumes to P

Continuous Access XP Journal user guide 3About this guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30 Continuous Access XP JournalPSUS(pair suspended-split)(see Table 5 on page 32 for split types)Data volume pair is not synchronized because you spli

Continuous Access XP Journal user guide 31Continuous Access XP Journal split types (PSUS)Table 5 describes Continuous Access XP Journal split types. Y

32 Continuous Access XP JournalWhen you split a Continuous Access XP Journal pair, the primary and secondary disk arrays ensure synchronization by com

Continuous Access XP Journal user guide 33Continuous Access XP Journal suspend typesTable 7 describes the Continuous Access XP Journal suspend types,

4System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35One-to-o

Continuous Access XP Journal user guide 5Associating primary and remote disk arrays and configuring logical paths (Add DKC) . . . . . . . . . . . . .

6Resuming normal operations at the primary site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136Troubleshooting . .

Continuous Access XP Journal user guide 7multi-target configurations) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8or COPY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7425 Lo

Continuous Access XP Journal user guide 9About this guideThis guide provides information about:• Understanding copy solutions• Understanding Continuou