Reasons to check pool capacity

The following are cases in which the free space of the pool is not formatted. In these cases, the free space of the pool may not increase:

• Pools other than the selected pool are being formatted.

• The pool usage level reaches up to the warning threshold or the depletion threshold.

• The selected pool is blocked.

• I/O loads to the storage system are high.

• The cache memory is blocked.

• Pool-VOLs in the selected pool are blocked.

• Pool-VOLs which are external volumes in the selected pool are blocked.

• Correction access executes to the pool-VOL in the selected pool.

 The following are cases in which the formatted pool capacity may decrease:

• New pages are being allocated.

• LDEV format is being performed on the pool-VOL.

• Correction copy is being executed.