Deleting storage pools
You might want to delete a storage pool when the cache of the storage pool is not optimal or when it is no longer used by any aggregate or Flash Pool aggregate. You can delete a storage pool by using the Delete Storage Pool dialog box in System Manager.
The storage pool must not be used by any aggregate.
Click Storage > Aggregates & Disks > Storage Pools.
In the Storage Pools window, select the storage pool that you want to delete, and then click Delete.
In the Delete Storage Pool dialog box, click Delete.