Sun Cluster Software Installation Guide for Solaris OS

Example—Mirroring File Systems That Cannot Be Unmounted

The following example shows the creation of mirror d1 on the node phys-schost-1 to mirror /usr, which resides on c0t0d0s1. Mirror d1 consists of submirror d11 on partition c0t0d0s1 and submirror d21 on partition c2t2d0s1. The /etc/vfstab file entry for /usr is updated to use the mirror name d1. Device c2t2d0 is a multihost disk, so the localonly property is enabled.

(Create the mirror)
# metainit -f d11 1 1 c0t0d0s1
d11: Concat/Stripe is setup
# metainit d21 1 1 c2t2d0s1
d21: Concat/Stripe is setup
# metainit d1 -m d11
d1: Mirror is setup
(Edit the /etc/vfstab file)
# vi /etc/vfstab
#device        device        mount    FS     fsck    mount    mount
#to mount      to fsck       point    type   pass    at boot  options
/dev/md/dsk/d1 /dev/md/rdsk/d1 /usr ufs  2       no global
(Move resource groups and device groups from phys-schost-1)
# scswitch -S -h phys-schost-1
(Reboot the node)
# shutdown -g0 -y -i6
(Attach the second submirror)
# metattach d1 d21
d1: Submirror d21 is attached
(View the sync status)
# metastat d1
d1: Mirror
      Submirror 0: d11
         State: Okay
      Submirror 1: d21
         State: Resyncing
      Resync in progress: 15 % done
(Identify the device-ID name of the mirrored disk's raw-disk device group)
# scdidadm -L
1         phys-schost-3:/dev/rdsk/c2t2d0     /dev/did/rdsk/d2
(Display the device-group node list)
# scconf -pvv | grep dsk/d2
Device group name:						dsk/d2
  (dsk/d2) Device group node list:		phys-schost-1, phys-schost-3
(Remove phys-schost-3 from the node list)
# scconf -r -D name=dsk/d2,nodelist=phys-schost-3
(Enable the localonly property)
# scconf -c -D name=dsk/d2,localonly=true