Creating the Emergency Recovery boot media and tapes

1. Bring the machine down to init state 1 and log in as root

2. Run vxconfigd(1M) to start up the ODM configuration daemon
   

3. Use vxplex(1M) to disconnect the mirrored root plexes, for example:
   
   vxplex dis home-02
   vxplex dis home2-02
   vxplex dis rootvol-02
   vxplex dis standvol-02
   vxplex dis swapvol-02
   vxplex dis tmp-02
   vxplex dis var-02

4. Set up the kernel to ignore the ODM configuration:

   • Make a backup copy of /etc/conf/pack.d/vol/space.c using the following command:
     
     cp /etc/conf/pack.d/vol/space.c /etc/conf/pack.d/vol/space.c.old

     then edit /etc/conf/pack.d/vol/space.c, and change the two lines:

     #define VOL_ROOTDEV_IS_VOLUME
     #define VOL_SWAPDEV_IS_VOLUME
     

     to:

     #undef VOL_ROOTDEV_IS_VOLUME
     #undef VOL_SWAPDEV_IS_VOLUME
     

   • Make a backup copy of /etc/conf/init.d/kernel using the following command:
     
     cp /etc/conf/init.d/kernel /etc/conf/init.d_kernel.old

     then edit /etc/conf/init.d/kernel to move the ``swp1'' entry located just after the ``vol2'' entry to just below the ``vol1'' entry, and change the line from:

     swp1::sysinit:/sbin/swap -a /dev/vx/dsk/swapvol > /dev/sysmsg 2>&1
     

     to:

     swp1::sysinit:/sbin/swap -a /dev/swap > /dev/sysmsg 2>&1
     

     Change the initdefault entry from ``3'' to ``1'' to avoid having to quickly press the spacebar in Step 6.

   • Make a backup copy of /etc/inittab using the following command:
     
     cp /etc/inittab /etc/inittab.old

     then edit /etc/inittab in the same manner as you edited /etc/conf/init.d/kernel.

   • Make a backup copy of /etc/vfstab using the following command:
     
     cp /etc/vfstab /etc/vfstab.old

     then edit /etc/vfstab, and make the following type of substitutions on the non-commented lines:
     
     Replace ``/dev/vx/[r]dsk/home'' with ``/dev/[r]dsk/c0b0t0d0s4''
     
     Replace ``/dev/vx/[r]dsk/var'' with ``/dev/[r]dsk/c0b0t0d0sb''
     
     Replace ``/dev/vx/[r]dsk/home2'' with ``/dev/[r]dsk/c0b0t0d0sc''
     
     Replace ``/dev/vx/[r]dsk/tmp'' with ``/dev/[r]dsk/c0b0t0d0sd''

     You should also comment out any other ODM-defined slices.

   • Make a backup copy of /etc/swaptab using the following command:
     
     cp /etc/swaptab /etc/swaptab.old

     then edit /etc/swaptab, replacing ``/dev/vx/dsk/swapvol'' with ``/dev/swap''

   • Run the following command:
     
     touch /etc/vx/reconfig.d/state.d/install-db

   • Run the following command to obtain the major/minor numbers of the root slice:
     
     ls -l /dev/dsk/c0b0t0d0s1

   • Replace the major/minor numbers for /.io/bootdisk/[r]root:
     
     rm /.io/bootdisk/*root
     mknod root b MAJOR MINOR
     mknod rroot c MAJOR MINOR

     where MAJOR and MINOR are the major and minor numbers displayed by the ls in the previous step.

5. Rebuild the kernel:
   
   /etc/conf/bin/idbuild -B

6. Reboot using the init 6 command.

   If you changed the initdefault entry in Step 4, then you do not need to interrupt the reboot. If you did not change the initdefault entry, when you see the UnixWare logo appear, immediately press <Space> to enter the Bootstrap Command Processor. Enter the command initstate=1, followed by boot. This will cause the machine to boot into single-user mode.

7. If you edited the initdefault entry in Step 4, change the initdefault entry back to ``3''.

8. Run the emergency_disk(1M) and emergency_rec(1M) commands.