If your configuration follows some basic rules to avoid ambiguity, Data ONTAP can automatically assign disk ownership and pool membership.
If you decide to change the way Data ONTAP has assigned the disks, you can do so at any time.
Note: You can disable disk autoassignment using the disk.auto_assign option.
For more information, see the na_option(1) man page.
What autoassignment does
When disk autoassignment runs, Data ONTAP looks for any unassigned disks and assigns them to the same system and pool as all other disks on their loop or stack.
When autoassignment is invoked
Disk ownership autoassignment does not happen immediately after disks are introduced into the storage system.