Hp XP P9500 Storage User Manual download pdf (Page 30)

Figure 4 Remote path between LDKC00 of P9500 and XP24000/XP20000 Disk Array

• When connecting P9500 with XP12000 Disk Array or XP24000/XP20000 Disk Array, contact

your HP representative for information regarding supported microcode versions.

• When connecting P9500 with XP12000 Disk Array, set up the P9500 using a CU:LDEV

number between 00:00 to 3F:FF, but do not use 40:00 or higher.

• When connecting P9500 with XP24000/XP20000 Disk Array, set up the P9500 volume

using a CU:LDEV number between 00:00 to EF:FF. The volume must be on LDKC00.

• Up to 32,768 volumes can be used for volume pairs.

• P9500 and XP24000/XP20000 Disk Array can be set up in 3-data-center (3DC) cascade or

multi-target configurations. These configurations are used when combining Continuous Access

Synchronous and Continuous Access Journal systems. See “Configurations with Continuous

Access Synchronous” (page 141) to review these configurations. There are no restrictions for

combining primary and secondary sites between P9500 and XP24000/XP20000 Disk Array.

Guidelines for preparing systems for Cnt Ac-J

Use the following guidelines to ensure that your P9500 systems are ready for Cnt Ac-J:

• Identify the locations where your Cnt Ac-J primary and secondary data volumes will be located,

then install and configure the P9500 systems.

• Make sure that primary and secondary systems are configured for Remote Web Console

operations. See the HP XP P9000 Remote Web Console User Guide for information.

• Make sure that primary and secondary systems are properly configured for Cnt Ac-J operations,

for example, cache memory considerations. See the entry for Cache and Nonvolatile Storage

in the requirements table, “System requirements” (page 15). Also consider the amount of

Cache Residency data to be stored in cache when determining the required amount of cache.

• Make sure that primary and secondary systems have the system option modes specified that

may be required for your Cnt Ac-J configuration. See “System option modes ” (page 31),

below, for more information.

• Make sure that primary systems are configured to report sense information to the host.

Secondary systems should also be attached to a host server to enable reporting of sense

information in the event of a problem with an S-VOL or secondary system. If the remote system

is not attached to a host, it should be attached to a primary site host server so that monitoring

can be performed.

• If power sequence control cables are used, set the power select switch for the cluster to LOCAL

to prevent the primary system from being powered off by the host. Make sure the secondary

system is not powered off during Cnt Ac-J operations.

30 Planning volumes, P9500 systems

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Hp XP P9500 Storage User Manual Page 30