A minimum of 3 copies of replica is required on a system.
Here are few commands to manage state database replicas ...
To create the initial state db replicas:
# metadb -a -f c1t0d0s3
To create additional state database replicas on disks:
# metadb -a c1t1d0s3 c1t2d0s3 c1t3d0s3
To create 2 state database replicas on the same disk:
# metadb -a -c2 c1t3d0s3
To list all the state database replicas :
#metadb
To list the status:
#metadb -i
To delete a state database replica:
#metadb -d c1t0d0s3
Volumes:
To create a stripe volume :
# metainit d0 1 2 c0t1d0s3 c0t2d0s3 -i 32k
To create a concat volume :
# metainit d1 2 1 c0t1d0s3 1 c0t2d0s3
To remove a stripe or concat volume :
# metaclear d0
To create a mirror using 2 concat volumes (d1 and d2) :
# metainit d10 -m d1
# metattach d10 d2
To detach a submirror from a mirror volume :
# metadetach d10 d2
To place a submirror offline :
# metaoffline d10 d2
To place a submirror online :
# metaonline d10 d2
To show the details of a volume :
# metastat d10
To create a RAID5 volume :
# metainit d11 -r c1t2d0s4 c2t2d0s4 c1t2d0s4
Now lets look at how to create and manage filesystem on the volumes
To create filesystem on the volume :
# newfs -i 8192 /dev/md/rdsk/d10
To mount the filesystem :
# mkdir /data
# mount -F ufs /dev/md/dsk/d10 /data
Also add the below line to /etc/vfstab so that the filesystem mounts on every reboot.
/dev/md/dsk/d10 /dev/md/rdsk/d10 /data ufs 2 yes -
