HP XP Array Manager Software - Manual (Page 116)

• For the Tiered Storage Manager to automatically determine migration target volumes, external
migration target volumes require that all of the volumes must be in the same external storage system
and the RAID level and SLPR (storage management logical partition) of all migration target volumes
be the same. If the micro version of XP24000/XP20000 is 60-05-12-00/00 or earlier, you must
not perform I/O operations on the volumes while migration is being executed.
Pool conditions
If the target is a THP pool:
• The status cannot be blocked.
• The number of virtual volumes in the THP pool must be fewer than 8,192.
• When the migration source is a THP volume, the source and target volumes must be in different
THP pools.
• The target THP pool must have more unused capacity than the source volume.
• The usage rate during data migration must not exceed the larger threshold value (threshold 1 or
threshold 2).
• The maximum over-provisioning percent of the THP pool does not exceed the over-provisioning
warning threshold value.
Restrictions
The following volumes cannot be migrated:
• Cross-system copy-pair volumes.
• Volumes configured for XRC. Note that a volume in a suspended status can be a source volume,
but not a target volume.
• Volumes configured for concurrent copying.
• The migration source volume is configured as a Continuous Access Synchronous pair or Hitachi
TrueCopy for Mainframe pair, and the migration target is an external storage system.
• Volumes that are part of a Continuous Access Synchronous pair, Hitachi TrueCopy for Mainframe
pair, Universal Replicator, or Hitachi Universal Replicator pair, and the CLPRs (cache logical
partitions) of the migration target and migration-source volumes are different.
• Quorum disks.
• The P-VOL and S-VOL of a High Availability Manager pair.
Note that when the migration-source volume is a LUSE, a migration target must be selected for each
volume that constitutes the LUSE.
Table 11 Volumes that cannot be used as migration sources or targets
Non-migratable sources/targets
Cache LUN XPorCache Residency Manager for Mainframe is set for the volume
Command Device The volume is used as a command device
XP Snapshot Status The volume is one of the following:
• The volume is the P-VOL of a Snapshot pair, its status is PAIR, and the number of generations is 64
• The volume is the P-VOL of a Snapshot pair and its status is not PAIR
• The volume is the V-VOL of a Snapshot pair
• The volume is the POOL of a Snapshot pair
XP Thin Provisioning [Pool Volume] The volume is a THP pool volume
Operations in Legacy mode 116