HP XP P9000 Provisioning for Mainframe Systems User Guide

Notes on deleting a tier in a pool
You cannot delete a pool-VOL under these conditions.
• If the pool-VOL is deleted, the used capacity of the pool-VOL exceeds the pool threshold.
• If the pool-VOL is deleted, the subscription rate of the total V-VOL capacity exceeds the
subscription limit.
• If the pool-VOL with system area has less than 3.8 GB of free space. There must be 3.8 GB
of free space in the pool in order to delete the pool-VOL with system area.
Deleting the pool-VOL stops the tier relocation. The process resumes after the pool-VOL is deleted.
Procedure 9 To delete a tier in a pool
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 that contains the pool-VOLs to be deleted.
The pool information appears on the right.
3. Select the Pool volumes tab and select all the pool-VOLs contained in the tier to be deleted.
To select multiple pool-VOLs that are consecutively listed, highlight all of the pool-VOLs to be
selected and press the Shift key. To select separate pool-VOLs, click each pool-VOL while
pressing the Ctrl key.
You cannot delete a pool-VOL unless Shrinkable has been applied.
4. Click Shrink Pool.
5. In the Shrink Pool window, verify the changes.
The details of Before Shrinking and After Shrinking, including the pool capacity, the used
pool capacity and the free pool capacity, appears in Prediction Result of Shrinking.
6. In the Confirm window, confirm the settings, 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.
Deleting a pool
When you delete a pool, its pool-VOLs (LDEVs) are blocked. If the pool-VOLs are blocked, they
must be formatted before they can be reused. If the blocked pool-VOL is an external volume, select
Normal Format when formatting the volume. You can delete a pool only when all of the THP-VOLs
have been deleted.
1. In the Storage Systems tree on the left pane of the top window, select Pool.
2. From the Pools table on the right, select the pool to be deleted.
You can select multiple pools with the Shift key if the LDEV IDs are listed consecutively. If the
pools are not in consecutive order, click the LDEV ID of each pool that you want to delete
while pressing the Ctrl key.
3. Click More Actions, and then select Delete Pools.
The Delete Pools window opens.
You cannot delete a pool whose usage is not 0%, or a pool for which THP V-VOLs are assigned.
4. Click Finish.
The Confirm window opens.
To continue with the shredding operation and delete volume data, click Next. For details about
the shredding operation, see the HP XP P9000 Volume Shredder for Open and Mainframe
Systems User Guide.
If the pool is blocked, you might not be able to perform shredding operations.
128 Configuring thin provisioning