HP XP P9000 Provisioning for Mainframe Systems User Guide

Table Of Contents
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 typePriority
SATA-W/V or SATA-E1
SAS7.2K2
SAS10K3
SAS15K4
SSD5
External volume6
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