ONTAP add half of the disk to the original raid group and the other half is going to be added to mirrored raid group. ::> storage aggregate add-disks -aggregate aggr1 -diskcount 6 -raidgroup rg0 Disks...ONTAP add half of the disk to the original raid group and the other half is going to be added to mirrored raid group. ::> storage aggregate add-disks -aggregate aggr1 -diskcount 6 -raidgroup rg0 Disks would be added to aggregate "aggr1" on node "node-1" in the following manner: data 1.11.8 SAS 836.9GB 838.4GB data 1.11.9 SAS 836.9GB 838.4GB data 1.11.10 SAS 836.9GB 838.4GB data 1.21.11 SAS 836.9GB 838.4GB The number of disks must be even when adding disks to the syncmirror aggregate.