Expanding a pool

To expand a pool (that is, increase the capacity of the pool), you add pool-VOLs to the pool.

Note
  • You cannot expand a pool while the pool is being shrunk.
  • When you add pool volumes to a Dynamic Tiering pool, tier relocation activities that are in process are stopped.
  • When you add pool volumes with available monitoring information to a Dynamic Tiering pool, tier relocation is performed. When you add pool volumes without available monitoring information to a pool, the page usage rate is averaged in the tier.

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.

  3. From the Pools table, select the pool you want to expand. You can expand only one pool at a time.

  4. Click Expand Pool.

  5. In the Expand Pool window, select the pool-VOL.

    1. Click Select Pool VOLs.

    2. In the Select Pool VOLs window, from the Available Pool Volumes table, select the pool-VOLs you want to assign, and then click Add.

      The selected pool-VOLs are registered in the Selected Pool Volumes table.

      Up to 1024 volumes can be added including the volumes already in the pool. You can use the Filter option to choose volumes by parameter.

      CautionFor details about adding of LDEVs carved from accelerated compression-enabled parity groups, see Guidelines for pools when accelerated compression is enabled.
      NoteIf necessary, perform the following steps:
      • From Filter option, select ON to filter the rows.
      • Click Select All Pages to select pool-VOLs in the table. To cancel the selection, click Select All Pages again.
      • Click Options to specify the unit of volumes or the number of rows to be viewed.
      • To set the tier rank of an external volume to a value other than Middle, select a tier rank from External LDEV Tier Rank, then click Add.
      • For a pool, you can add volumes whose Drive Type/RPM settings are the same and whose RAID Levels are different. For example, you can add the following volumes to the same pool:

        Volume whose Drive Type/RPM is SAS/15K and whose RAID Level is 5 (3D+1P)

        Volume whose Drive Type/RPM is SAS/15K and whose RAID Level is 5 (7D+1P)

      • When assigning a pool with DP-VOL enabled with full allocation, LDEVs cannot be added in the parity group with accelerated compression enabled.

    3. Click OK.

      The Select Pool VOLs window closes. The number of the selected pool volumes appears in Total Selected Pool Volumes, and the total capacity of the selected pool-VOL appears in Total Selected Capacity.

  6. Click Finish.

    The Confirm window appears.

  7. In the Task Name text box, 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.

  8. Click Apply.

    If Go to tasks window for status is selected, the Tasks window appears.
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