HP XP7 User Manual

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.
Data drive typePriority
SAS7.2K1
SAS10K2
SAS15K3
SSD4
External volume5
If multiple pool-VOLs of the same data 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
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 including the control
information exceeds the subscription limit. For details about the formula used to calculate the
required pages for one THP V-VOL including the control information, see “Pool subscription
limit” (page 139).
• If the pool-VOL with system area is deleted, more than 4.2 GB of free space is necessary in
the pool.
Notes on using Smart Tiers
• 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 including the
control information exceeds the subscription limit. For details about the formula used to
calculate the required pages for one THP V-VOL including the control information, see
“Pool subscription limit” (page 139).
◦ If the pool-VOL with system area is deleted, more than 4.2 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.
Managing pools and THP V-VOLs 149

HP XP7 Specifications

General

Brand	HP
Model	XP7
Category	Storage
Language	English