Enabling capacity saving functions on DP-VOLs

Use the following procedure to enable the capacity saving function on DP-VOLs.

 Do not use capacity saving and NAS deduplication on the same volumes, because the additional processing decreases the I/O performance substantially. For information about the NAS deduplication function, see the File Services Administration Guide.

Before you begin

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

• Prerequisites for enabling deduplication on DP-VOLs:

• The license for the capacity saving functions is installed.

• The status of the pools is other than Blocked.

• The deduplication function must be enabled on the pool.

• There are enough available cache management devices.

• The LDEV status is Normal.

• The emulation type is OPEN-V.

• Capacity Saving Status is other than Deleting Volume, Failed, or Rehydrating.

• Data Direct Mapping is disabled.

• Full Allocation is disabled.

• The DP-VOLs are not used as Universal Replicator journal volumes.

Procedure

1. Open the Logical Devices 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 Volumes, and then select System GUI.

In Device Manager - Storage Navigator:

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

2. Click Logical Devices.

2. In the LDEVs pane, select an LDEV ID, and click Edit LDEVs.

3. In the Edit LDEVs window, click Capacity Saving, and then select either Compression or Deduplication and Compression.

 If you enable Deduplication and Compression on a DP-VOL, you will not be able to change the setting from Deduplication and Compression to Compression later.

• If Deduplication is Not Available in the pool, Deduplication and Compression cannot be selected.

• If the LDEV status of a deduplication system data volume in the pool is other than Normal, Deduplication and Compression cannot be selected.

4. Click Finish. The Confirm window appears.

5. 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.

6. Click Apply.

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