You need to understand how Data ONTAP assigns disks to plexes to configure your disk shelves and host adapters.
When assigning a disk to a pool, Data ONTAP determines the shelf for the disk and ensures that the disks in pool0 are from different shelves from the disks in pool1. Therefore, before enabling SyncMirror, you should ensure that the disks are installed in at least two shelves and the shelves are connected to the system with separate cables and adapters. Disk pools must be physically separate to ensure high availability of the mirrored aggregate.
Disks from pool0 are used to create plex0, while disks from pool1 are used to create plex1.
For more information about V-Series system slot assignments, see the Hardware Universe.