Enabling deduplication on an existing pool

Use the following procedure to enable the data deduplication function on an existing pool. When you enable deduplication on a pool, the deduplication system data volume for the pool is created. This task must be performed 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 license for the capacity saving function must be installed.

• There must be enough available cache management devices to create deduplication system data volumes. 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.

• There must be enough available LDEV IDs.

Procedure

1. Open the Pools window.

In Command Suite:

1. On the Resources tab, click Storage Systems, and then expand All Storage Systems and the target storage system.

2. Right-click DP Pools, and then select System GUI.

In Device Manager - Storage Navigator:

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

2. Click Pools.

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

3. Click More Actions, and select Edit Pools.

4. In the Edit Pools window, click the Deduplication check box.

5. 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 (check the box for the row), 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 click OK.

To change the Initial LDEV ID, specify the number of LDKC, CU, LDEV, and Interval, and click OK. To confirm used LDEV IDs, click View LDEV IDs to view the used LDEV IDs in the View LDEV IDs window.

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

8. Click Finish on 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.