You can add a plex to an existing unmirrored aggregate or traditional volume using one of the following methods.
- Let Data ONTAP select the disks used to mirror the volume.
- Select the disks used to mirror the aggregate or traditional volume yourself.
- Preview the disks Data ONTAP would use, then either use those disks or replace one or more of the disks with disks you choose.
Note: If the unmirrored volume that you want to mirror uses disks of different capacities, Data ONTAP can select disks that match the smallest capacity from a different disk pool. If there are not enough disks of that capacity in the disk pool, Data ONTAP selects a higher capacity disk and downsizes it.
