Ensure that the disk set has been created. For instructions, see How to Create a Disk Set.
Become superuser on the node.
List the DID mappings.
# scdidadm -L
Choose drives that are shared by the cluster nodes that will master or potentially master the disk set.
Use the full device-ID path names when you add drives to a disk set.
The first column of output is the DID instance number, the second column is the full physical path name, and the third column is the full device-ID path name (pseudo path). A shared drive has more than one entry for the same DID instance number.
In the following example, the entries for DID instance number 2 indicate a drive that is shared by phys-schost-1 and phys-schost-2, and the full device-ID path name is /dev/did/rdsk/d2.
1 phys-schost-1:/dev/rdsk/c0t0d0 /dev/did/rdsk/d1 2 phys-schost-1:/dev/rdsk/c1t1d0 /dev/did/rdsk/d2 2 phys-schost-2:/dev/rdsk/c1t1d0 /dev/did/rdsk/d2 3 phys-schost-1:/dev/rdsk/c1t2d0 /dev/did/rdsk/d3 3 phys-schost-2:/dev/rdsk/c1t2d0 /dev/did/rdsk/d3 …
Become owner of the disk set.
# metaset -s setname -t
Specifies the disk set name
Takes ownership of the disk set
Add the drives to the disk set.
Use the full device-ID path name.
# metaset -s setname -a drivename
Adds the drive to the disk set
Full device-ID path name of the shared drive
Do not use the lower-level device name (cNtXdY) when you add a drive to a disk set. Because the lower-level device name is a local name and not unique throughout the cluster, using this name might prevent the metaset from being able to switch over.
Verify the status of the disk set and drives.
# metaset -s setname
The metaset command adds the drives /dev/did/rdsk/d1 and /dev/did/rdsk/d2 to the disk set dg-schost-1.
# metaset -s dg-schost-1 -a /dev/did/rdsk/d1 /dev/did/rdsk/d2
To repartition drives for use in metadevices or volumes, go to How to Repartition Drives in a Disk Set.
Otherwise, go to How to Create an md.tab File to define metadevices or volumes by using an md.tab file.