Enabling and Disabling Thin Provisioning

You can enable or disable thin provisioning on an existing volume.

Disabling thin provisioning on a volume will fully allocate the volume size from free pool space (the reported size and the volume reserve will be the same). Enabling thin provisioning on a volume decreases the amount of space allocated to the volume (the reported size will be greater than the volume reserve).

Because snapshot reserve, local replication reserve, and replica reserve space are all based on a percentage of the volume reserve, enabling and disabling thin provisioning will also affect these values.

Note: Be careful when enabling or disabling thin provisioning on a volume. Enable this feature only for volumes that you have monitored and determined to be underused; that is, the amount of in-use space stays significantly less than the reported size. Consider disabling thin provisioning for volumes that are nearing their maximum in-use space value.

See Understanding Thin Provisioning for details on thin provisioning.

When enabling thin provisioning on a volume, be aware of these issues:

When disabling thin provisioning on a volume, be aware of these issues:

To enable or disable thin provisioning on a volume, click:

Volumes > volume_name > Modify volume settings > Space tab

The Modify Volume Settings - Space dialog box appears (Figure 20: Modify Volume Settings - Space ).

Select or deselect the checkbox next to Thin provisioned volume to enable or disable thin provisioning on the volume.

Optionally, if enabling thin provisioning, make any desired adjustments to the minimum volume reserve, in-use space warning value, or maximum in-use space value by moving the relevant sliders. You cannot set the maximum value below the warning value.

When you are finished, click OK.