Disabling the capacity saving functions on DP-VOLs

Use the following procedure to disable the capacity saving functions on DP-VOLs.

When you disable the capacity saving setting, both the used capacity of the pool and the physical used capacity of the pool increase due to the process of expanding the data. Use the following formula to calculate what the used capacity and physical used capacity of the pool will be after the expanding process has finished:

pool-used-capacity-size-after-expanding = 
   used-pool-capacity-size + (used-DP-VOL-capacity × saving-ratio-of-the-pool-[%])

physical-pool-used-capacity-size-after-expanding = 
   used-physical-pool-capacity-size* + (used-DP-VOL-capacity × saving-ratio-of-the-pool-[%])

* If accelerated compression is used, the physical used capacity of the pool must be confirmed.

This information is displayed as follows by Device Manager - Storage Navigator:

• used-pool-capacity-size: Displayed as Capacity - Used on the Pools window.

• used-physical-pool-capacity-size: Displayed as Physical Capacity - Used on the Pools window.

• saving-ratio-of-the-pool-[%]: Displayed as Pool Saving (Post Process Data) - Saving (%) on the Pools window.

• used-DP-VOL-capacity: Displayed as Capacity - Used on the Virtual Volumes tab of each pool window.

The expanding process stops when the size of the used capacity or physical used capacity of a pool reaches the depletion threshold. If this occurs, you must expand the capacity of the pool so that the expanding process can start again.

Before you begin

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

• Prerequisites for disabling deduplication on DP-VOLs:

• The status of the pool is other than Blocked by pool failure.

• Capacity Saving status is other than Deleting Volume or Failed.

• The Disable retry of data updating setting is enabled on the Edit Advanced System Settings window. For instructions, see the Virtual Storage Platform G1000 System Administrator Guide.

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 the desired LDEV ID, and click Edit LDEVs.

3. In the Edit LDEVs window, click Capacity Saving, and select Disabled.

If the LDEV status of the deduplication system data volume in the pool is other than Normal, you cannot change the setting from Deduplication and Compression to Disabled.

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

7. Verify that the Capacity Saving Status has changed from Rehydrating to Disabled, and then verify that Capacity Saving is Disabled. After that, set the Disable retry of data updating to Disable on the Edit Advanced System Settings window. For instructions, see the Virtual Storage Platform G1000 System Administrator Guide.