Deleting extent pools from a storage configuration

Complete this task to remove one or more extent pools from a storage configuration.

When you are using the DS CLI to delete extent pools as part of a storage configuration deletion, the following sequential deletions must have already occurred:

The volumes associated with the extent pool must be removed.
(CKD volume configuration only) The logical control units (LCUs) that are associated with the extent pool must be removed.
The ranks that are assigned to the extent pool must be unassigned or removed.
The arrays that are assigned to the extent pool must be removed.

To delete an extent pool or a number of extent pools, you must first generate a list of extent pool IDs by storage type (fixed block or CKD) by issuing the lsextpool command. After you determine which extent pools can be deleted, you can issue the rmextpool command that designates the extent pools that you want to delete.

Perform the following steps to delete one or more extent pools from a fixed block volume configuration.

Issue the lsextpool command to display a list of extent pools. Ensure that you designate the storage type within your command parameters. Enter the lsextpool command at the dscli command prompt with the following parameters and variables:
```
dscli>lsextpool -dev storage_image_ID -l -stgtype [fb | ckd]
```
Analyze the list and determine which extent pools can be deleted.
Issue the rmextpool command to delete the designated extent pools. Enter the rmextpool command at the dscli command prompt with the following parameters and variables:
```
dscli>rmextpool -dev storage_image_ID  extentpool_ID
```
Note: If you are deleting several extent pools, you can add the -quiet parameter to your command. This parameter turns off the confirmation message that is generated for each deletion transaction.
Issue the lsextpool command after the deletion processing has completed to verify that the extent pools have been deleted.