HP StorageWorks Auto LUN XP user guide for the XP10000/XP12000 (December 2005)

16 Auto LUN XP for the XP10000/XP12000

You cannot make pairs of the volumes.

Specify the logical volumes satisfying the conditions described in Table 3 as the source and target

volumes. The source and target volumes must be specified by LDEV ID.

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 Auto LUN XP cannot be used as source volumes.

• Volumes on which the RAID Manager is performing volume migration operations.

• Volumes that form a Snapshot XP pair cannot be used as source volumes.

• Virtual and pool volumes cannot be used as source volumes.

• Inaccessible volumes, or volumes in an abnormal state cannot be used as source volumes (for example,

pinned track or fenced volumes).

• Continuous Access. If the status of a HP StorageWorks Continuous Access XP volume is PSUS, PSUE, or

SMPL, the volume can be used as a source volume. If not, the volume cannot be used as a source

volume. When a Continuous Access XP pair is deleted from the MCU, the status of both volumes

changes to SMPL, and both volumes can be used as source volumes. When a Continuous Access XP

pair is deleted from the RCU, the status of the P-VOL changes to PSUS, the status of the S-VOL changes

to SMPL, and both volumes can be used as source volumes.

• Business Copy. Using a BC volume as a source volume depends on the status and cascade

configuration of the volume. If the status of a BC volume is not split-pending COPY(SP) or PSUS(SP), the

volume can be used as a source volume. If the status is COPY(SP) or PSUS(SP), the volume cannot be

used as a source volume. This applies to cascaded and non-cascaded volumes.

Table 4 shows which non-cascaded volumes can be used as source volumes.

(OPEN-V without

VMA setting)

Not movable Movable Not movable Not movable Movable Not movable

(OPEN-V with

VMA setting)

Not movable Not movable Movable Not movable Not movable Movable

Table 3 Movability of volumes in pairs consisting of CV and normal values (continued)

Source volume Target volume

Table 4 Non-cascaded volumes that can be used as source volumes

Pair configuration Use P-VOL as source volume Use S-VOLs as source volumes

Ratio of P-VOL to S-VOLs is 1:1 Yes Yes

Ratio of P-VOL to S-VOLs is 1:2 Yes Yes

Ratio of P-VOL to S-VOLs is 1:3 No Yes