Shrinking a pool

Use this procedure to shrink, or decrease the capacity of, a pool.

Note
  • You can shrink up to eight pools at the same time.
  • If you decrease the pool capacity soon after creating the pool or adding a pool-VOL, processing might take a while to complete.
  • You cannot decrease the pool capacity when any of the following operations is in process in the target pool:
    • When the pool is being created or deleted
    • When the pool capacity is being increased or decreased
    • When the pool is being recovered
    • When the shrink pool operation is being stopped
    • When the threshold is being changed
    • When zero pages are being reclaimed
    • When DP-VOLs are being created
    • When DP-VOL capacity is being increased
  • Do not issue a RAID Manager command to decrease the capacity of a pool whose capacity is already in the process of being decreased.

Before you begin

The Storage Administrator (Provisioning) role is required to perform this task.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools, and then select the pool that you want to shrink.

  3. On the Pool volumes tab, select the pool-VOL to be deleted.

    You can delete the pool-VOL when Yes is displayed in the Shrinkable column.

  4. Click Shrink Pool.

  5. In Task Name, type a unique name for the task or accept the default.

    You can enter up to 32 ASCII characters and symbols, with the exception of: \ / : , ; * ? " < > |. The value "date-window name" is entered by default.

  6. In Estimated Result of Shrinking, review the details of Before Shrinking and After Shrinking, including the total pool capacity, the used pool capacity, and the free pool capacity.

  7. If the estimated result of shrinking is acceptable, click Apply.

    If Go to tasks window for status is selected, the Tasks window appears.
Parent Topic
  • Decreasing pool capacity

    When you want to decrease the capacity of, or shrink, a pool, you delete one or more pool volumes (pool-VOLs) from the pool.