Apple Xserve RAID: Using RAID 1.2 Admin and Disk Utility - Manual (Page 19)

Chapter 2 Working With RAID Arrays 19
Deleting a RAID Array
You delete a RAID array in the Delete Array window.
To delete an array:
1 In the RAID Admin window, click Delete Array.
2 If necessary, enter the management password and click OK.
3 In the Delete Array window, click the button for the array you want to delete.
The drives for that array turn red in the picture of the system.
4 Click the confirmation checkbox to confirm that you want to remove the array.
5 Click Delete Array (or click Cancel if you don’t want to delete the array).
Warning: Be sure to back up all data before you delete an array. If you delete an array
without first backing up all the data stored on the array, you will lose that data with
no possibility of recovery.