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Operating Systems Solaris Mirror the root disk
# 1  
Old 02-02-2010
Mirror the root disk
Hi all

I wish to mirror for the root disk, but last time i do, make the server cannot boot up. Smilie So this time, hope you guys can assist me on it. =)
At the last code, is the step i wish to do. Please help to check and correct me if got any wrong.

Code:
root@leo # format </dev/null
Searching for disks...done


AVAILABLE DISK SELECTIONS:
       0. c1t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
          /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w21000011c6a73c58,0
       1. c1t1d0 <SEAGATE-ST314670FSUN146G-0354 cyl 14087 alt 2 hd 24 sec 848>
          /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w21000011c6a75d1b,0
......
......
Specify disk (enter its number):

I will like to mirror this two disk. Currently the OS is installed in the c1t0d0
Code:
root@leo # vi /etc/vfstab
"/etc/vfstab" 13 lines, 460 characters
#device         device          mount           FS      fsck    mount   mount
#to mount       to fsck         point           type    pass    at boot options
#
#/dev/dsk/c1d0s2 /dev/rdsk/c1d0s2 /usr          ufs     1       yes     -
fd      -       /dev/fd fd      -       no      -
/proc   -       /proc   proc    -       no      -
/dev/dsk/c1t0d0s1       -       -       swap    -       no      -
/dev/dsk/c1t0d0s0       /dev/rdsk/c1t0d0s0      /       ufs     1       no
-
swap    -       /tmp    tmpfs   -       yes     -
/devices        -       /devices        devfs   -       no      -
ctfs            -       /system/contract        ctfs    -       no      -
objfs           -       /system/object  objfs   -       no      -
sharefs         -       /etc/dfs/sharetab       sharefs -       no      -
~

Below is the c1t0d0
Code:
Warning: Current Disk has mounted partitions.
/dev/dsk/c1t0d0s0 is currently mounted on /. Please see umount(1M).
/dev/dsk/c1t0d0s1 is currently used by swap. Please see swap(1M).
partition> p
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm       0 - 11670      113.26GB    (11671/0/0) 237528192
  1       swap    wu   11673 - 14086       23.43GB    (2414/0/0)   49129728
  2     backup    wm       0 - 14086      136.71GB    (14087/0/0) 286698624
  3          -    wu       0 - 14086      136.71GB    (14087/0/0) 286698624
  4          -    wu   11671 - 11672       19.88MB    (2/0/0)         40704
  5 unassigned    wm       0                0         (0/0/0)             0
  6 unassigned    wm       0                0         (0/0/0)             0
  7 unassigned    wm       0                0         (0/0/0)             0

Below is the c1t1d0
Code:
partition> p
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm       2 - 11672      113.26GB    (11671/0/0) 237528192
  1       swap    wu   11673 - 14086       23.43GB    (2414/0/0)   49129728
  2     backup    wu       0 - 14086      136.71GB    (14087/0/0) 286698624
  3          -    wu       2 - 14086      136.69GB    (14085/0/0) 286657920
  4          -    wu       0 -     1       19.88MB    (2/0/0)         40704
  5 unassigned    wm       0                0         (0/0/0)             0
  6 unassigned    wm       0                0         (0/0/0)             0
  7 unassigned    wm       0                0         (0/0/0)             0

Is it my below step correct ? kindly advise me =)
Code:
# prtvtoc /dev/rdsk/c1t0d0s2 | fmthard -s - /dev/rdsk/c1t1d0s2
# metadb -a -f -c2 /dev/dsk/c1t0d0s4 /dev/dsk/c1t1d0s4
Mirror the root slice.
# metainit -f d10 1 1 c1t0d0s0
# metainit -f d20 1 1 c1t1d0s0
# metainit d0 -m d10
# metaroot d0
Mirror the swap slice.
# metainit -f d11 1 1 c1t0d0s1
# metainit -f d21 1 1 c1t1d0s1
# metainit d1 -m d11
Update /etc/vfstab
Reboot the system.
# metaroot d0
# lockfs -fa
# init 6
After reboot
# metattach d0 d20
# metattach d1 d21

# 2  
Old 02-03-2010
Correct. try to give at least 50mb for your metadb and have 3 replicas at least, for good practise.
And also remember to change your dump device :- dumpadm -d /dev/md/dsk/d1 and eeprom to point boot-device to "disk disk1"
# 3  
Old 02-03-2010
Quote:
Originally Posted by incredible
Correct. try to give at least 50mb for your metadb and have 3 replicas at least, for good practise.
And also remember to change your dump device :- dumpadm -d /dev/md/dsk/d1 and eeprom to point boot-device to "disk disk1"

# dumpadm -d /dev/md/dsk/d1
the dump device is the swap device ?

erm... how about the eeprom??? Smilie
# 4  
Old 02-03-2010
yes, dump device is the swap space
#eeprom boot-device?="disk disk1"

Btw, is your 2 disks of the same size? Did you get any errors when you did prtvtoc? Why aren't the disks of the same type? Just noticed that..
# 5  
Old 02-03-2010
You should install a bootblock on the second disk. On a SPARC machine you use:
Code:
/usr/sbin/installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk /dev/rdsk/c1t1d0s0

I think the bootblock is not covered by the SVM sync process.
Last edited by hergp; 02-03-2010 at 03:25 AM.. Reason: correct typo
# 6  
Old 02-03-2010
erm... because previously the two devices is in the veritas group.
may i need to newfs the c1t1d0 first before i create the mirror
# 7  
Old 02-03-2010
You do not need to create a filesystem on the second disk. The resync process will copy the filesystem from the first disk block by block.
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