HP XP P9500 Storage - Manual (Page 80)

CAUTION: If you delete a pool, its pool-VOLs (LDEVs) will be blocked. Blocked volumes should
be formatted before use.
CAUTION: If the V-VOL data is migrated through the host, the unallocated area of the volume is
also copied. At this time, the used capacity of the pool increases after the data migration, because
the unallocated area before the data migration becomes the allocated area by the write processing
during the migration. Therefore, if data migration with many V-VOLs is performed at the same
time, the pool may become full.
To migrate the V-VOL data:
1.
Copy all data of V-VOLs from the source to the target.
2. Perform the reclaiming zero pages operation.
Perform this procedure for each V-VOL. However, when you perform the data migration with each
file, perform the reclaiming zero pages operation if necessary.
To restore the backup data:
1.
Restore the V-VOL data.
2. Perform the reclaiming zero pages operation.
Perform this procedure for each V-VOL.
Smart Tiers
About tiered storage
In a tiered storage environment, storage tiers can be configured to accommodate different categories
of data. A tier is a group of storage media (pool volumes) in a THP pool. Tiers are determined by
a single storage media type. A storage tier can be one type of data drive, including SSD, SAS,
SATA, or external volumes. Media of high-speed response performance make up the upper tiers.
Media of low-speed response or cost become the lower tiers. Up to a maximum of three tiers can
coexist in each Smart Tiers pool.
80 Configuring thin provisioning