Hewlett Packard Enterprise HPE XP7, User Manual, Page: 159 / 311

For more information about formatting LDEVs, see the HPE XP7 Provisioning for Open Systems User
Guide .
• The pool usage rate has reached the warning threshold (see Editing the data pool warning
threshold ).
• The I/O loads on the storage system are high.
• One of the following is blocked:
◦ The selected pool.
◦ The cache memory.
◦ The pool-VOLs in the selected pool.
◦ The external pool-VOLs in the selected pool.
• The access attribute on the pool-VOL in the selected pool has been corrected.
• You are not operating the format function for available pool capacity.
The following are circumstances under which the formatted pool capacity might decrease:
• New pages are being allocated.
• Correction copy is being executed.
Decreasing pool capacity
For more information about decreasing pool capacity, formatting LDEVs, and the Shrink Pool window,
see the HPE XP7 Provisioning for Open Systems User Guide .
If processing ends abnormally, check the Tasks window.
Prerequisites
• The used capacity of the pool-VOL must be below the pool threshold.
• If you are deleting pool-VOLs with system area, there must be more than 4.2 GB of available capacity.
• You must not be currently performing any of the following tasks:
◦ Creating a pool.
◦ Deleting a pool.
◦ Increasing a pool.
◦ Deleting a pool-VOL to decrease the pool capacity.
◦ Recovering a pool.
◦ Stopping the process of decreasing pool capacity.
◦ Editing a data pool warning threshold.
◦ Simultaneously running RAID Manager commands to decrease the pool capacity.
• You must not be maintaining the cache memory.
• The cache memory must be up and running.
Decreasing pool capacity 159