1. Two disks will be use for this example. The first disk will be the primary disk and the second will be the mirror.
Disk 1: c1t1d0 Disk 2: c1t0d0
2. Copy the layout of the Disk 1 into Disk 2.
# prtvtoc /dev/rdsk/c1t1d0s2 | fmthard -s - /dev/rdsk/c1t0d0s2
• Partition for the Disk 1:
Part Tag Flag Cylinders Size Blocks 0 root wm 0 - 2060 10.00GB (2061/0/0) 20972736 1 swap wu 2061 - 2885 4.00GB (825/0/0) 8395200 2 backup wu 0 - 14086 68.35GB (14087/0/0) 143349312 3 unassigned wm 2886 - 2889 19.88MB (4/0/0) 40704 4 var wm 2890 - 4126 6.00GB (1237/0/0) 12587712 5 opt wm 4127 - 6393 11.00GB (2267/0/0) 23068992 6 data wm 6394 - 11752 26.00GB (5359/0/0) 54533184 7 data1 wm 11753 - 14086 11.33GB (2334/0/0) 23750784
• Partition for the Disk 2:
Part Tag Flag Cylinders Size Blocks 0 root wm 0 - 2060 10.00GB (2061/0/0) 20972736 1 swap wu 2061 - 2885 4.00GB (825/0/0) 8395200 2 backup wu 0 - 14086 68.35GB (14087/0/0) 143349312 3 unassigned wm 2886 - 2889 19.88MB (4/0/0) 40704 4 var wm 2890 - 4126 6.00GB (1237/0/0) 12587712 5 opt wm 4127 - 6393 11.00GB (2267/0/0) 23068992 6 data wm 6394 - 11752 26.00GB (5359/0/0) 54533184 7 data1 wm 11753 - 14086 11.33GB (2334/0/0) 23750784
3. Create state replicas using the metadb command.
# metadb -a -f -c 3 /dev/dsk/c1t1d0s3 # metadb -a -c 3 /dev/dsk/c1t0d0s3
4. Initializing mirrors & submirrors.
# metainit -f d10 1 1 /dev/dsk/c1t1d0s0 # metainit -f d20 1 1 /dev/dsk/c1t0d0s0 # metainit d0 -m d10 # metaroot d0
Additional note:
Please run the metaroot command before reboot.
# metainit -f d11 1 1 /dev/dsk/c1t1d0s1 # metainit -f d21 1 1 /dev/dsk/c1t0d0s1 # metainit d1 -m d11
# metainit -f d14 1 1 /dev/dsk/c1t1d0s4 # metainit -f d24 1 1 /dev/dsk/c1t0d0s4 # metainit d4 -m d14
# metainit -f d15 1 1 /dev/dsk/c1t1d0s5 # metainit -f d25 1 1 /dev/dsk/c1t0d0s5 # metainit d5 -m d15
# metainit -f d16 1 1 /dev/dsk/c1t1d0s6 # metainit -f d26 1 1 /dev/dsk/c1t0d0s6 # metainit d6 -m d16
# metainit -f d17 1 1 /dev/dsk/c1t1d0s7 # metainit -f d27 1 1 /dev/dsk/c1t0d0s7 # metainit d7 -m d17
5. Updating /etc/vfstab.
# device device mount FS fsck mount mount # to mount to fsck point type pass at boot options # fd - /dev/fd fd - no - /proc - /proc proc - no - /dev/dsk/c1t1d0s1 - - swap - no - /dev/dsk/c1t1d0s0 /dev/rdsk/c1t1d0s0 / ufs 1 no - /dev/dsk/c1t1d0s5 /dev/rdsk/c1t1d0s5 /opt ufs 2 yes - /dev/dsk/c1t1d0s4 /dev/rdsk/c1t1d0s4 /var ufs 1 no - /dev/dsk/c1t1d0s7 /dev/rdsk/c1t1d0s7 /data1 ufs 2 yes - /dev/dsk/c1t1d0s6 /dev/rdsk/c1t1d0s6 /data ufs 2 yes - swap - /tmp tmpfs - yes -
to
# device device mount FS fsck mount mount # to mount to fsck point type pass at boot options # fd - /dev/fd fd - no - /proc - /proc proc - no - /dev/md/dsk/d1 - - swap - no - /dev/md/dsk/d0 /dev/md/rdsk/d0 / ufs 1 no - /dev/md/dsk/d5 /dev/md/rdsk/d5 /opt ufs 2 yes - /dev/md/dsk/d4 /dev/md/rdsk/d4 /var ufs 1 no - /dev/md/dsk/d7 /dev/md/rdsk/d7 /data1 ufs 2 yes - /dev/md/dsk/d6 /dev/md/rdsk/d6 /data ufs 2 yes - swap - /tmp tmpfs - yes -
6. Reboot.
7. Attaching the Mirrors.
# metattach d0 d20 # metattach d1 d21 # metattach d4 d24 # metattach d5 d25 # metattach d6 d26 # metattach d7 d27
8. Verify mirror:
# metastat -p d7 -m d17 d27 1 d17 1 1 c1t1d0s7 d27 1 1 c1t0d0s7 d6 -m d16 d26 1 d16 1 1 c1t1d0s6 d26 1 1 c1t0d0s6 d5 -m d15 d25 1 d15 1 1 c1t1d0s5 d25 1 1 c1t0d0s5 d4 -m d14 d24 1 d14 1 1 c1t1d0s4 d24 1 1 c1t0d0s4 d1 -m d11 d21 1 d11 1 1 c1t1d0s1 d21 1 1 c1t0d0s1 d0 -m d10 d20 1 d10 1 1 c1t1d0s0 d20 1 1 c1t0d0s0
9. Set boot path in OBP.
ok nvalias <diskname> /sbus@3,0/SUNW,fas@3,60000/sd@1,0:a ok boot <diskname>
Additional note:
In /etc/system file, add the following line:
set md:mirrored_root_flag=1
By default the system will not boot without one more than half the total metadb replicas. This will allow you to boot with only one metadb, if one of you disk drives fails.
