•
Decreasing the pool capacity.
•
Restoring the pool.
•
Stopping decreasing the pool capacity.
•
Changing the threshold.
•
Initializing the pool capacity.
•
Changing the external LDEV tier rank
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 including the control
information exceeds the subscription limit. For details about the formula used to calculate the
required pages for one THP V-VOL including the control information, see
•
If the pool-VOL with system area has less than 4.2 GB of free space. There must be 4.2 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.
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.
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, then click
Apply
.
If
Go to tasks window for status
is checked, the
Tasks
window opens.
Deleting a pool
The Storage Administrator (Provisioning) role is required to perform this task.
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 V-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.
3.
Click
More Actions
, 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.
Managing pools and THP V-VOLs
151