You can delete only custom pools. Predefined tape pools (Unrecognized tapes, Imported tapes, Free tapes, and the Acronis pool) cannot be deleted.
To delete a pool:
In the Navigation tree, click Tape management. If connected to the management server, select the storage node to which your tape device is attached.
Select the required pool and click Remove.
If the pool is associated with one or several vaults, the system will notify you that it cannot delete the pool. You need to click Close, change the pool in the settings of each of the vaults mentioned in the notification message, and then repeat the pool deletion operation.
Otherwise, select the pool to which the tapes of the pool being deleted will be moved after the deletion.