SUMMARY

From: Darryl V. Pace (dpace@tacticsus.com)
Date: Wed Mar 11 1998 - 12:49:24 CST


First, "thank you!", to everyone that replied to my query. Those that
replied were:
Eugene Kramer
Darren Dunham
Zivco Margetic
Steven Sakata
Matthew Ashcraft, and
Gert Marais

The original question was:
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> Managers,
> I've installed Veritas on a Solaris 2.5.1 system. With the
software,
> I've mirrored the root disk. I am wondering what the procedure is
> for starting the machine back up after a root disk failure. Can the
> machine somehow automatically fail over to the mirror, or will it
> require some sort of manual intervention? If the machine will require

> someone rebooting it, what is the procedure? Is it as simple as a
> plain reboot, or is there more involved? Please detail. I will
> summarize.
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 The answer below summarizes what's necessary to recover from a
root disk crash when the root disk has previously been mirrored via
Veritas.
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-----------------------------------------------

1. Determine the full path of the boot device and mirror device and copy
it
somewhere (or write down on the paper).

   # ls -l /dev/dsk/root_disk (mirror_disk)

   You will get the full path to the devices. It looks like this:

   /sbus@2,0/SUNW,soc@d,10000/SUNW,pln@a0000000,837d04/ssd@0,0:a

2. shutdown the machine

3. In ok prompt set aliases:

   ok nvalias <rootdisk> <path to the root device - long string>
   ok nvalias <mirrordisk> <path to the mirror device>
   ok nvstore /* store the info in NVRAM */
   ok setenv auto-boot? false /* after reset not to boot the machine
*/
   ok reset
   ok devalias

   You should see the aliases setup for your boot devices.

   ok setenv boot-device <rootdisk> /* set a boot device */
   ok setenv diag-device <rootdisk>
   ok reset
   ok devalias

   You should see the boot devices set as rootdisk.

   ok setenv auto-boot? true /* DO NOT FORGET THIS */

   ok boot rootdisk
or
   ok boot mirrordisk

   Any of those should boot. I am not awared that you can setup the
mirror
to autoboot. You have to do it manualy if anything goes wrong with the
   rootdisk.
Zivco Margetic

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