HP XP Auto LUN Software - Manual (Page 18)

18 Auto LUN XP for the XP12000/XP10000
Universal Replicator: If the status of a Universal Replicator volume is COPY or PAIR, the volume cannot be
used as a source volume. Note that if you specify a Universal Replicator volume as a source volume, you
cannot specify an external volume as the target volume.
ShadowImage for z/OS® and ShadowImage: Usage of ShadowImage for z/OS® and ShadowImage
volumes as a source volume depends on the status and cascade configuration of the volume as described
below.
• -The following volumes cannot be used as a source volume:
• ShadowImage for z/OS® volumes whose status is SP-Pend or V-Split.
• ShadowImage volumes whose status is COPY(SP) or PSUS(SP).
Table 3 shows which non-cascaded volumes can be used as source volumes.
Table 4 shows which cascaded volumes can be used as source volumes.
If any of the following operations are performed on an Auto LUN XP source volume during migration, the
Auto LUN XP volume migration process stops:
• Continuous Access XP operations that change the volume status to something other than PSUS, PSUE, or
SMPL
• BC operations that change the volume status to COPY(SP) or PSUS(SP)
• Continuous Access XP Journal operations
• Continuous Access XP Journal or Universal Replicator for z/OS® operation that changes the volume
status to COPY.
LUSE source volumes
To specify a LUSE source volume for migration, specify individual LDEVs within the LUSE volume (for
example, LDEVs with high usage). Auto LUN XP migrates only specified LDEVs. If needed, specify all LDEVs
of the LUSE volume to relocate the entire LUSE volume. In this case, ensure that the required reserved target
LDEVs are available.
Target volumes
Target volumes must be reserved prior to migration. Hosts cannot access reserved volumes. The following
volumes cannot be reserved:
• Logical Unit Size Expansion (LUSE) volumes
• Volumes set as command devices
• Volumes assigned to BC or Continuous Access XP pairs
• Volumes reserved for BC operations
• Volumes with Cache LUN data stored in cache
Table 3 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
Table 4 Cascaded volumes that can be used as source volumes
Pair Configuration Use P-VOL as source volume Use S-VOLs as source volumes
L1 pair, ratio of P-VOL to S-VOLs is 1:1 Yes Yes
L1 pair, ratio of P-VOL to S-VOLs is 1:2 Yes Yes
L1 pair, ratio of P-VOL to S-VOLs is 1:3 No Yes
L2 pair, ratio of P-VOL to S-VOLs is 1:1 Yes No
L2 pair, ratio of P-VOL to S-VOLs is 1:2 No No