Adding a disk to a disk group
To add a disk to an existing disk group, select Add or initialize one or more disks from the main menu of the vxdiskadm command.
You can also use the vxdiskadd command to add a disk to a disk group. Enter the following:
# vxdiskadd c1t1d0
where c1t1d0 is the device name of a disk that is not currently assigned to a disk group. The command dialog is similar to that described for the vxdiskadm command.
# vxdiskadm c1t1d0