This procedure is designed to preserve the root mirror disk before applying patches or upgrading. It provides an efficient path for recovery if the upgrade or patch installation is unsuccessful

1. Check that the boot disk has a valid mirror

The volumes associated with the root disk should have a single subdisk for each of the root disk and root mirror plexes.
Note: The root disk-B0 subdisk is a special case and can be ignored for purposes of this article.

Disks:
rootdisk is c1t0d0s2
rootmirror is c1t1d0s2

 

# vxprint -htqg rootdg
 

 

Disk group: rootdg

dg rootdg       default      default  29000    1089252062.20.avsmsnss11
dm rootdisk       c1t0d0s2     auto     5777     71127179 -
dm rootmirror     c1t1d0s2     auto     5777     71121402 -

sd rootdiskPriv   -            rootdisk   10487070 5777     PRIVATE   c1t0d0   ENA

v  rootvol      -            ENABLED  ACTIVE   10487070 ROUND     -        root
pl rootvol-01   rootvol      ENABLED  ACTIVE   10487070 CONCAT    -        RW
sd rootdisk-B0  rootvol-01   rootdisk   10487069 1        0         c1t0d0   ENA
sd rootdisk-02  rootvol-01   rootdisk   0        10487069 1         c1t0d0   ENA
pl rootvol-02   rootvol      ENABLED  ACTIVE   10487070 CONCAT    -        RW
sd rootmirror-01  rootvol-02 rootmirror 0        10487070 0         c1t1d0   ENA

v  swapvol      -            ENABLED  ACTIVE   16773534 ROUND     -        swap
pl swapvol-01   swapvol      ENABLED  ACTIVE   16773534 CONCAT    -        RW
sd rootdisk-01  swapvol-01   rootdisk   10492847 16773534 0         c1t0d0   ENA
pl swapvol-02   swapvol      ENABLED  ACTIVE   16773534 CONCAT    -        RW
sd rootmirror-02 swapvol-02  rootmirror 10487070 16773534 0         c1t1d0   ENA

v  usr          -            ENABLED  ACTIVE   8389656  ROUND     -        gen
pl usr-01       usr          ENABLED  ACTIVE   8389656  CONCAT    -        RW
sd rootdisk-04  usr-01       rootdisk   27445499 8389656  0         c1t0d0   ENA
pl usr-02       usr          ENABLED  ACTIVE   8389656  CONCAT    -        RW
sd rootmirror-03 usr-02      rootmirror 27260604 8389656  0         c1t1d0   ENA

v  var          -            ENABLED  ACTIVE   1733400  ROUND     -        gen
pl var-01       var          ENABLED  ACTIVE   1733400  CONCAT    -        RW
sd rootdisk-03  var-01       rootdisk   69390890 1733400  0         c1t0d0   ENA
pl var-02       var          ENABLED  ACTIVE   1733400  CONCAT    -        RW
sd rootmirror-04 var-02      rootmirror 35650260 1733400  0         c1t1d0   ENA
 

 

2. Install the Solaris boot block on the mirror disk:
 

 

# /usr/lib/vxvm/bin/vxbootsetup -g rootdg rootmirror
 

 

Note: If you have separate volumes for opt, export, home on the root disk, it is required to define the partitions for those volumes using vxmksdpart if you are using version 4.1 or below:
 

 

# /usr/lib/vxvm/bin/vxmksdpart
 

Usage: vxmksdpart [-f] [-g diskgroup] subdisk sliceno [tag flags]
 

 

e.g. In following example, the opt volume subdisk is on rootmirror-05, and slice 7 is free on the mirror disk:
 

 

# vxmksdpart -g rootdg rootmirror-05 7 0x00 0x00
 

 

3. Disassociate the mirror plex:

 

# vxplex -g rootdg dis rootvol-02
 

# vxplex -g rootdg dis swapvol-02
 

# vxplex -g rootdg dis usr-02
 

# vxplex -g rootdg dis var-02
 

# vxplex -g rootdg dis opt-02 -------------------- if any
 

# vxplex -g rootdg dis home-02 -------------------- if any
 

 

4. Edit the following files to make the root mirror disk bootable without VERITAS Volume Manager (tm):

 

# mount /dev/dsk/c1t1d0s0 /mnt
 

# cd /mnt/etc
 

# cp -p system system.orig
 

# cp -p vfstab vfstab.orig
 

# cp -p vfstab.prevm vfstab
 

Change the c#t#d# number in above file to ensure the correct partitions will be referenced in the vfstab file:

 

# touch /mnt/etc/vx/reconfig.d/state.d/install-db
 

Edit /mnt/etc/system and comment out following lines using the "*" character:

Before changes:
 

rootdev ..
 

set vxio ..
 

After changes:
 

* rootdev ..
 

* set vxio ..
 

5. Unmount the root mirror's / partition
 

# umount /mnt
 

6. Apply patches or upgrade system per Installation Guide

7. Determine if the upgrade was successful

If the upgrade or patching was successful, attach back mirror plex to root disk:

 

# vxplex -g rootdg att rootvol rootvol-02
 

# vxplex -g rootdg att swapvol swapvol-02
 

# vxplex -g rootdg att var var-02
 

# vxplex -g rootdg att usr usr-02
 

or

If the upgrade or patching was not successful and want to go back to mirror disk, then follow this procedure:

1. Boot from mirror disk

- Bring down the system to the OK prompt
- Change the default boot device to c1t1d0 rootmirror disk
- Boot system

Remove the partition having tag 14 and 15 from mirror disk using format completely. Do not just change tag type, zero out these partitions and labels before exiting from format.

2. Determine which version of VERITAS Volume Manager is installed:

The procedure if you are running VERITAS Volume Manager 3.5 and below:

# vxinstall => custom installation => choose to encapsulate current bootdisk (eg. c1t1d0) => leave other disk alone .
It will ask whether you want to preserve Volume Manager information on another disk, answer yes to this question

a. Reboot is required after running vxinstall:

 

# vxdisk -f init c1t0d0 layout=sliced
 

# vxdg -g rootdg adddisk rootdisk=c1t0d0
 

 

b. Mirror root mirror disk with original rootdisk:

 

# /etc/vx/bin/vxrootmir rootdisk
 

# /etc/vx/bin/vxmirror rootmirror rootdisk
 

 

The procedure if you are running VERITAS Volume Manager 4.0 and above:

a. Manually start up vxconfigd to allow for the encapsulation of the root mirror:

 

# vxiod set 10
 

# vxdconfigd -m disable
 

# vxdctl init
 

# vxdisk -f init c1t0d0 format=sliced
 

# vxdctl enable
 

# rm /etc/vx/reconfig.d/state.d/install-db
 

# vxdiskadm => option 2 Encapsulate one or more disks => choose c1t1d0 (old rootmirror) => put under rootdg
 

# shutdown -i6 -g0 -y
 

b. Mirror root mirror disk with original root disk:

 

# /etc/vx/bin/vxrootmir -g rootdg rootdisk
 

# /etc/vx/bin/vxmirror -g rootdg rootmirror rootdisk
 

 

Final vxprint will look as follows:

 

# vxprint -htqg rootdg
 

 

Disk group: rootdg

dg rootdg       default      default  29000    1089252062.20.avsmsnss11
dm rootdisk       c1t0d0s2     auto     5777     71127179 -
dm rootmirror     c1t1d0s2     auto     5777     71121402 -

sd rootdiskPriv   -            rootdisk   10487070 5777     PRIVATE   c1t0d0   ENA

v  rootvol      -            ENABLED  ACTIVE   10487070 ROUND     -        root
pl rootvol-01   rootvol      ENABLED  ACTIVE   10487070 CONCAT    -        RW
sd rootdisk-B0  rootvol-01   rootdisk   10487069 1        0         c1t0d0   ENA
sd rootdisk-02  rootvol-01   rootdisk   0        10487069 1         c1t0d0   ENA
pl rootvol-02   rootvol      ENABLED  ACTIVE   10487070 CONCAT    -        RW
sd rootmirror-01  rootvol-02 rootmirror 0        10487070 0         c1t1d0   ENA

v  swapvol      -            ENABLED  ACTIVE   16773534 ROUND     -        swap
pl swapvol-01   swapvol      ENABLED  ACTIVE   16773534 CONCAT    -        RW
sd rootdisk-01  swapvol-01   rootdisk   10492847 16773534 0         c1t0d0   ENA
pl swapvol-02   swapvol      ENABLED  ACTIVE   16773534 CONCAT    -        RW
sd rootmirror-02 swapvol-02  rootmirror 10487070 16773534 0         c1t1d0   ENA

v  usr          -            ENABLED  ACTIVE   8389656  ROUND     -        gen
pl usr-01       usr          ENABLED  ACTIVE   8389656  CONCAT    -        RW
sd rootdisk-04  usr-01       rootdisk   27445499 8389656  0         c1t0d0   ENA
pl usr-02       usr          ENABLED  ACTIVE   8389656  CONCAT    -        RW
sd rootmirror-03 usr-02      rootmirror 27260604 8389656  0         c1t1d0   ENA

v  var          -            ENABLED  ACTIVE   1733400  ROUND     -        gen
pl var-01       var          ENABLED  ACTIVE   1733400  CONCAT    -        RW
sd rootdisk-03  var-01       rootdisk   69390890 1733400  0         c1t0d0   ENA
pl var-02       var          ENABLED  ACTIVE   1733400  CONCAT    -        RW
sd rootmirror-04 var-02      rootmirror 35650260 1733400  0         c1t1d0   ENA