Adding disks to a mirrored aggregate or traditional volume, where the user selects the disks with assistance from Data ONTAP

You can preview what disks Data ONTAP would select if it were to add new disks to the aggregate or traditional volume.

Steps

1. Enter the following command:{ aggr | vol } add { aggrname | volname } -n ndisks[@disksize]

   aggrname is the name of the mirrored aggregate to which you are adding disks.

   volname is the name of the mirrored traditional volume to which you are adding disks (without the /vol/ prefix).

   ndisks is the number of disks to use. Adding new disks will fail if the number of disks is an odd number.

   disk-size specifies the disk capacity, in gigabytes. Half these disks must be in each disk pool.

   Note: If you use the disk-size option, first determine the size of spare disks in the disk pools using the vol status -r command.

   Data ONTAP returns an aggr add or vol add command that specifies the disks it would add to each plex of the mirrored volume.

2. If you want to...	Then...
   Use the disks specified by Data ONTAP.	Enter the aggr add or vol add command specified.
   Substitute other disks for one or more disks specified by Data ONTAP.	Enter the aggr add or vol add command and substitute other disks for one or more of the disks specified.

   Example

   In this example, the following command previews the disks that Data ONTAP would use when adding two new 36-GB disks to the aggrA mirrored aggregate.aggr add aggrA -n 2@36

   Data ONTAP returns the following command:aggr add aggrA -d 6.4 -d 8.6

   Example

   In this example, the following command previews the disks that Data ONTAP would use when adding two new 36-GB disks to the volA mirrored volume.vol add volA -n 2@36

   Data ONTAP returns the following command:vol add volA -d 6.4 -d 8.6