Enabling deduplication on an existing pool

When you enable deduplication on a pool, the deduplication system data volume (DSD volume) for the pool is created. You must enable deduplication on a pool before you can enable deduplication on DP-VOLs assigned to the pool.

Before you begin

  • The Storage Administrator (Provisioning) role is required to perform this task.
  • The dedupe and compression license must be installed.
  • A sufficient number of cache management devices must be available to create the deduplication system data volume. Each deduplication system data volume uses 14 cache management devices.
  • The status of the pool must be Normal.
  • Data Direct Mapping must be disabled.
  • Multi-tier pool must be disabled.
  • A sufficient number of LDEV IDs must be available.

Procedure

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

  2. Click Pools.

  3. In the Pools table, select the pool for which you want to change the deduplication setting.

  4. Click More Actions, and select Edit Pools.

  5. In the Edit Pools window, click Deduplication and then select Enable.

  6. If you want to edit the assigned deduplication system data volume, click Edit Deduplication System Data Volume.

    The Edit Deduplication System Data Volume window opens.

  7. If you want to change the deduplication system data volume options, click Change Deduplication System Data Volume Options. In the Change Deduplication System Data Volume Options window:

    1. If you want to change the LDEV name or LDEV ID of a deduplication system data volume, select the volume, and then click Change Deduplication System Data Volume Options.

      To change the LDEV name, specify the prefix characters and the initial number for the selected LDEV, and then click OK. To change the Initial LDEV ID, specify the number of LDKC, CU, LDEV, and Interval, and then click OK. To confirm the used LDEV IDs, click View LDEV IDs.

    2. When you are done changing the deduplication system data volume options, click OK in the Change Deduplication System Data Volume Options window.

  8. Click Finish in the Edit Pools window.

    The Confirm window opens.

  9. 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.

  10. Click Apply.

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