Manual migration, Requirements and restrictions, Logical volumes – HP XP Auto LUN Software User Manual

Page 15: Source volumes

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Auto LUN XP user guide for the XP1024/XP128

15

4.

Analyze monitor data to confirm tuning results.

Manual migration

Use manual migration to select and migrate logical volumes under direct, manual control. The manual

migration function displays estimated results of proposed migration operations, which you can use to

determine expected performance improvements prior to the actual migration.
While auto migration operations are based on disk usage and hierarchy of parity groups, you can use

manual migration operations to address back-end processor usage (DKPs and DRRs) and volume and

parity group usage. If monitoring shows high or unbalanced processor usage, use manual migration

operations to tune the processor performance of the XP1024/XP128.

Requirements and restrictions

Logical volumes

Source and target volumes must be in the same XP1024/XP128 and have the same emulation type and

capacity.

NOTE:

For users in the StorageAdmins group, the function you can use are limited. For more information

about these limitations, see the HP StorageWorks Command View XP User Guide for XP Disk Arrays or the

HP StorageWorks XP Remote Web Console User Guide for XP1024/XP128.

Whether you can or cannot perform volume migration with a pair consisting of customized volumes (CVs)

and normal volumes depends on the volumes’ emulation type. For details, see

Table 3

.

You cannot make pairs of the volumes.

Source volumes

The following describes whether volumes can be used as source volumes:

Volumes set as command devices (reserved for use by hosts) cannot be used as source volumes.

Volumes in an abnormal or inaccessible condition (for example, fenced) cannot be used as source

volumes.

Volumes with Cache LUN data stored in cache cannot be used as source volumes.

iSCSI volumes (volumes to which paths are defined from iSCSI ports) cannot be used as source

volumes.

Volumes that HP StorageWorks Continuous Access XP Journal or Universal Replicator for z/OS uses as

a data or journal volume cannot be used as source volumes.

Volumes reserved by a migration program other than Volume Migration cannot be used as source

volumes.

Table 3

Movability of volumes in pairs consisting of CV and normal values

Source volume

Target volume

Normal volume

(not OPEN-V)

Normal volume

(OPEN-V)

CV

(not OPEN-V)

CV

(OPEN-V)

Normal volume

(not OPEN-V)

Movable

Not movable

Normal volume

(OPEN-V)

Movable

Movable

CV

(not OPEN_V)

Not movable

Movable

CV

(OPEN-V)

Movable

Movable

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