Zero page reclamation in Hitachi VSP

We can reclaim zero pages in a DP-VOL to free pool capacity. If a page assigned to a DP-VOL contains only zero binary data, we can reclaim the page.

To reclaim zero pages in a DP-VOL

1. In Storage Navigator main window, select Pool in the Storage Systems tree
   The pool name appears below Pool.
2. Select the pool associated with the DP-VOL(dp volume) that has pages you want to release.
3. Select the Virtual Volumes
4. From the table, select the DP-VOL(dp volume) that has pages you want to release.
5. Click More Actions, and then select Reclaim Zero Pages.
   The Reclaim Zero Pages window opens (You cannot release pages in a DP-VOL when the DP-VOL is not in a normal status or the DP-VOL is in the process of reclaiming zero pages.)
6. In Task Name give a unique name for this task or accept the default, and then click Apply.