HP XP P9000 Provisioning for Mainframe Systems User Guide

Procedure 10 To release pages in a THP V-VOL
1. In the Remote Web Console main window, in the Storage Systems tree, select Logical Devices.
The following is another way to select LDEVs.
1. In the Remote Web Console main window, in the Storage Systems tree, select Pool.
The pool name appears below Pool.
2. Select the pool associated with the THP V-VOL that has pages you want to release.
3. Select the Virtual Volumes tab.
2. From the table, select the THP V-VOL that has pages you want to release.
To select multiple THP V-VOLs that are consecutively listed, highlight all of the THP V-VOLs to
be selected and press the Shift key. To select separate THP V-VOLs, click each THP V-VOL
while pressing the Ctrl key.
3. Click More Actions, and then select Reclaim Zero Pages.
The Reclaim Zero Pages window opens.
You cannot release pages in a THP V-VOL when the THP V-VOL is not in a normal status or
the THP V-VOL is in the process of reclaiming zero pages.
4. In Task Name type a unique name for this task or accept the default, and 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, click Refresh in Remote Web Console to
update the Page Status. If the Page Status is not immediately updated, wait a while, and then click
Refresh again. Completed status is displayed 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 will not automatically continue after the storage system restarts.
In any of the following cases, the reclaiming zero pages will stop, and THP-VOL pages will not be
released:
• LDEV formatting was performed while reclaiming zero pages.
• The pool-VOL that is being accessed by the target THP-VOL was blocked.
• The pool associated with the target THP-VOL was blocked while reclaiming zero pages.
• Cache memory failure occurred while reclaiming zero pages.
• The THP-VOL was deleted when zero pages were reclaimed.
• The initial copy operation between the Continuous Access Synchronous Z pair or the Continuous
Access Journal Z pair was performed on the THP-VOL in which zero pages were being
reclaimed.
Stopping the release of pages in a THP V-VOL
1. In the Remote Web Console main window, in the Storage Systems tree, select Logical Devices.
The following is another way to select LDEVs.
1. In the Remote Web Console main window, in the Storage Systems tree, select Pool.
The pool name appears below Pool.
2. Select the pool associated with the THP V-VOL that has pages you want to release.
3. Select the Virtual Volumes tab.
2. From the table, select the THP V-VOL that you want to stop from releasing pages.
To select multiple THP V-VOLs that are consecutively listed, highlight all of the THP V-VOLs to
be selected and press the Shift key. To select separate THP V-VOLs, click each THP V-VOL
while pressing the Ctrl key.
132 Configuring thin provisioning