HP XP P9500 Storage - Manual (Page 126)

NOTE: You cannot perform the following operations on a pool while the pool volume capacity
is in the process of shrinking. Wait until shrinking completes or stop the shrinking process.
•
Expand Pool
•
Shrink Pools
•
Edit Pools
•
Restore Pools
If you delete the pool-VOL with the pool’s system area, the used capacity and the management
area will move to other pool volumes. If you delete the pool-VOL with system area, a different
system area pool-VOL will be assigned automatically according to the priority shown in the following
table. A pool must include one or more pool-VOLs.
Hard disk drive type Priority
SATA-W/V or SATA-E 1
SAS7.2K 2
SAS10K 3
SAS15K 4
SSD 5
External volume 6
If multiple pool-VOLs of the same hard disk drive type exist, the priority of each is determined by
internal index of the storage system.
If pool capacity is decreased soon after creating a pool or adding a pool-VOL, processing may
take a while to complete.
Notes on using Thin Provisioning Z
You cannot delete a pool-VOL under these conditions.
•
If the pool-VOL is deleted, the used capacity of the pool-VOL exceeds the pool threshold.
•
If the pool-VOL is deleted, the subscription rate of the total V-VOL capacity exceeds the
subscription limit.
•
If the pool-VOL with system area is deleted, more than 3.8 GB of free space is necessary in
the pool.
Notes on using Smart Tiers Z
You cannot delete a pool-VOL under these conditions.
•
If the pool-VOL is deleted, the used capacity of the pool-VOL exceeds the pool threshold.
•
If the pool-VOL is deleted, the subscription rate of the total V-VOL capacity exceeds the
subscription limit.
•
If the pool-VOL with system area is deleted, more than 3.8 GB of free space is necessary in
the pool.
When the pool-VOL is deleted, the pages contained in the deleted pool-VOL transfer to another
pool-VOL in the same tier. If the used capacity in the tier exceeds Rate of Free Space Newly Allocated
to, the overflowing pages transfer to another tier.
When pool-VOLs in the pool are empty, the appropriate tier is deleted.
Deleting the pool-VOL stops tier relocation. The process resumes after the pool-VOL is deleted.
126 Configuring thin provisioning