Completed is displayed as the Page Status even when no pages can be reclaimed.Reclaiming zero pages in a DP-VOL
The Storage Administrator (Provisioning) role is required to perform this task.
You can reclaim pages in a DP-VOL to free pool capacity. If a page assigned to a DP-VOL contains only zero binary data, you can reclaim the page by performing the operation to release zero pages. Reclaiming the page decreases the used pool capacity.
Before releasing pages in a DP-VOL, see Releasing pages in a DP-VOL). If the operation to release zero pages is performed on V-VOLs enabled for full allocation, the used pool capacity is not changed before the operation to release zero pages is performed.
To release pages in a DP-VOL:
Perform one of the following to display the Reclaim Zero Pages window.
For Command Suite:
On the Resource tab, expand the Storage Systems tree. Right-click Volumes of the target storage system, then select System GUI. On the LDEVs tab, select Reclaim Zero Pages.
For the Logical Devices window in Storage Navigator:
Expand the Storage Systems tree and select Logical Devices. On the LDEVs tab, select the LDEV to be operated, click More Actions, then click Reclaim Zero Pages.
Expand the Storage Systems tree and select Logical Devices. Click Actions > Logical Device > Reclaim Zero Pages to open the window.
For the Pools window in Storage Navigator:
Expand the Storage Systems tree and select Pools. On the Virtual Volumes tab, select the LDEV to be operated, click More Actions, then Reclaim Zero Pages.
Expand the Storage Systems tree and select Pools. On the Virtual Volumes tab, click Actions > Logical Device > Reclaim Zero Pages to open the window.
You cannot release pages in a DP-VOL when the DP-VOL is not in a normal status or the DP-VOL is reclaiming zero pages.
In Task Name type a unique name for this task or accept the default, then click Apply.
If Go to tasks window for status is checked, the Tasks window opens.
After the operation to reclaim zero pages is complete, refresh the display to update the Page Status. If the Page Status is not immediately updated, wait a while, then refresh the display.
Completed is displayed as the Page Status even when no pages can be reclaimed.
If you have started the reclaiming zero pages operation, and the storage system is powered off, the reclaiming zero pages operation does not automatically continue after the storage system restarts.
In any of the following cases, the reclaiming zero pages will stop, and DP-VOL pages will not be released:
LDEV formatting was performed while reclaiming zero pages.
The pool-VOL that is being accessed by the target DP-VOL was blocked.
The pool associated with the target DP-VOL was blocked while reclaiming zero pages.
Cache memory failure occurred while reclaiming zero pages.
The DP-VOL was deleted when zero pages were reclaimed.
The initial copy operation between the TrueCopy pair or the Universal Replicator pair was performed on the DP-VOL in which zero pages were being reclaimed.