Tip

Failover scheme, installboot and disk to disk copy

Here is a poor man's failover scheme.

Copy primary boot disk to second disk. If primary boot disk fails, reboot to the secondary's disk instead of rebuilding the OS.

- umount secondary disk's partition
- newfs the filesystems
- remount the partition
- perform disk to disk copy
- copy prepared /etc/vfstab2 to secondary disk's /etc/vfstab
- issue installboot command


#!/bin/sh
# ==========================================================================
#---< slash2  /dev/dsk/c0t1d0s0 >--------
# ==========================================================================

# mkdir /.SLASH2  /.USR2 /.VAR2
echo Backing up `hostname`  root partition  from  disk 0 to disk 1 : `date`

/usr/sbin/umount /.SLASH2
/usr/sbin/newfs /dev/dsk/c0t1d0s0  <--------
# ==========================================================================
echo

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Backing up `hostname` /dev/dsk/c0t0d0s5 from disk 0 to disk 1 : `date` /usr/sbin/umount /.USR2 /usr/sbin/newfs /dev/dsk/c0t1d0s5 <-------- # ========================================================================== echo Backing up `hostname` /dev/dsk/c0t0d0s6 from disk 0 to disk 1 : `date` /usr/sbin/umount /.VAR2 /usr/sbin/newfs /dev/dsk/c0t1d0s6 <

...and so on and so on for remaining partitions

This was first published in January 2003

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