Creating a Cache Logical Partition

•Adding or changing CLPR definitions can require several hours or more.

•If you are using XP Continuous Access Journal, data and journal volumes can belong to the different CLPRs, but the journal volumes in the same journal group must belong to the same CLPR. For more information on XP Continuous Access Journal, see the HP StorageWorks XP24000/XP20000 Continuous Access Journal Software User's Guide and the Hitachi Universal Replicator™ for Mainframe User's Guide: HP XP24000/XP20000 Disk Array .

The following operations are not recommended with cache logical partitions:

•Creating LUSE volumes across multiple CLPRs.

NOTE:

If you forcibly perform this operation, the CLPR volumes included in the LUSE volumes cannot be used for HP StorageWorks XP Continuous Access Software or the for Mainframe pair volumes.

•XP Business Copy Quick Restore operations that affect multiple CLPRs

•HP StorageWorks XP Auto LUN Software manual migration operations that affect multiple CLPRs

•Continuous Access Asynchronous or Asynchronous for Mainframe operations across CLPR boundaries. If these are allocated to the same consistency group, you cannot create a Continuous Access Asynchronous pair, and you cannot migrate a Continuous Access Asynchronous parity group to another CLPR.

•A parity group that contains LDEVs assigned to Cache Residency cache extents cannot be migrated to another CLPR

NOTE:

To create a CLPR, the remaining cache size which is calculated by subtracting Cache Residency size from the cache size of CLPR 0 needs 8 GB or more.

To create a cache logical partition:

1.Access the Partition Definition window, and select an SLPR in the Partition Definition tree on the left side of the window to display the Storage Logical Partition window.

2.Right-click an SLPR from the Partition Definition tree, on the upper left portion of the window, to display the Create CLPR pop-up menu. Select Create CLPR. This will add a cache logical partition to the Partition Definition tree.

3.Select the newly created CLPR to display the Cache Logical Partition window. In the Detail for CLPR section, on the lower left portion of the window, do the following:

•In the CLPR Name field, enter the name of the cache logical partition, in up to 16 alphanu- meric characters.

•In the Cache Size field, enter the cache capacity. You may select from 4 to 508 GB, in 2 GB increments. The default value is 4 GB. The size of the cache will be allocated from CLPR 0, but you must leave at least 8 GB remaining in CLPR 0.

•In the Cache Residency Area field, enter the desired capacity for the Cache Residency area. You may enter the value within the range of 0 to 16384. The default value is 0.

4.Click Apply to apply the settings.

5.The change in cache capacity is reflected in this cache logical partition and in CLPR 0.

32 XP Disk/Cache Partition Operations