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How ONTAP add disk to the SyncMirror Aggregate

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Applies to

  • ONTAP 9
  • ONTAP Select
  • SyncMirror

Answer

  • ONTAP  add half of the disk to the original raid group and the other half is going to be added to mirrored raid group.

Example:

::> 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:

First Plex

  RAID Group rg0, 8 disks (block checksum, raid_dp)
                                                      Usable Physical
    Position   Disk                      Type           Size     Size
    ---------- ------------------------- ---------- -------- --------
    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

Second Plex

  RAID Group rg0, 3 disks (block checksum, raid_dp)
                                                      Usable Physical
    Position   Disk                      Type           Size     Size
    ---------- ------------------------- ---------- -------- --------
    data       1.21.11                   SAS         836.9GB  838.4GB
    data       1.21.12                   SAS         836.9GB  838.4GB
    data       1.21.13                   SAS         836.9GB  838.4GB

Aggregate capacity available for volume use would be increased by 2.10TB.

  • When specifying the -disklist manually, make sure to specify the same number of disks in the -mirror-disklist as in the -disklist.
  • The RAID group to which disks are added can be specified using the -rg option.

Additional Information

The number of disks must be even when adding disks to the syncmirror aggregate.

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