How to add the spare disk on netapp filer

Here is the steps to add the disk as spare disk on netapp

1. SSH into the controller
2. turn off the auto assign option by running the command options disk.auto_assign off
3. Put the new hard drive on one of the empty slots on disk shelf
4. run the command disk show -n  , this will show the newly added disk as not owned by any controller
5. run this command disk assign oa.00.8  to assign the controller where 0a is the controller identification ,00 is the disk shelf number and 8 is the disk number
6. Turn on the auto assign option by running the command options disk.auto_assign on
7. run disk show , you will be seeing the new disk as spare
8. for some reason you want to remove that hard drive you can unassign the disk by running the command disk assign 0a.00.8 -s unowned -f