Enabling accelerated compression

Use this procedure to enable accelerated compression on a parity group. If you change the accelerated compression from disable to enable for the parity group used by the pool, each of 120 GB on a basis of a accelerated compression-parity group are decreased in the pool. The process of decreasing a pool capacity may take an extended period of time.

Before you begin

  • You must have the Storage Administrator role.
  • The RAID level and drive configuration of the target parity group must be accessible for use for pool volumes.
  • The target parity group must be an internal parity group.
  • The status of LDEVs in the target parity group must be Normal or Blocked.
  • All LDEVs in the parity group must already be added to the same pool.
  • The capacity of the defined internal volumes must be 8 GB or more. (The capacity is equal to or greater than the minimum capacity of a pool volume.)
  • If the defined internal volumes are used as pool volumes, those pool volumes belong to the same Dynamic Provisioning pool or Thin Image pool.
  • The defined internal volumes must have no LUN path definitions.
  • The defined internal volumes must not be used by Volume Migration.
  • The defined internal volumes must not be reserved by the Data Retention Utility.
  • The defined internal volumes must not have the Protect, Read Only, or S-VOL Disable attribute of Data Retention Utility.
  • There must not be any DP-VOL page reserved areas.

Procedure

  1. In the Device Manager - Storage Navigator Explorer pane, select Storage Systems, and then expand the tree for the storage system.

  2. Display the parity group for which you want to enable accelerated compression.

    • To display all parity groups in the storage system, click Parity Groups.
    • To display only internal parity groups, expand Parity Groups, and then click Internal.

  3. Select the desired parity group, and then click More Actions Edit Parity Groups.

  4. In Accelerated Compression, check Enable.

    Caution

    When you enable accelerated compression, confirm if the data reduction efficiency can be achieved. For details, see Guidelines for pools when accelerated compression is enabled.

  5. Click Finish.

  6. In the Confirm window, confirm the settings. In Task Name, type a unique name for this task or accept the default, and then click Apply. If Go to tasks window for status is checked, the Tasks window opens.

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