Sol10, Grub and boot archive

From: Charles Gagnon (charlesg@unixrealm.com)
Date: Sat Nov 18 2006 - 20:44:56 EST


I am on the hunt for information on the boot archive, what it does,
how its managed and so on.

We had a HUGE UPS failure in our office on friday. All the machines
ended-up going black for a split second and powering back up.
Typically a VERY bad scenario for UNIX hardware of any kind.

Usually we only have to deal with running 'fsck' everywhere, but the
X4100 w/ Sol10 installed really didn't enjoy this.

After a few retries at 'fsck -y', I notice they kept coming back to
single-user prompt. It took me a while to notice that the systems
needed:

- Reboot and watch the console actively cause you have 10 secs to
  catch the "Failsafe Boot" option... I could NOT figure out how to
  force a failsafe reboot from the single-user mode.

- Bring them up on failsafe and mount each mirrored root drive one
  at a time on /a, run a 'bootadm update-archive -R /a' on each and
  reboot.

All this took me forever so now I want to figure out how to prevent
it.

a) Can I force a failsafe boot without sitting there watching the
   machines come up? That's helpful when you try to do multiples.

b) Can this step be prevented somehow? Anything I can change,
   reconfigure or fix to save me this step?

Thanks.

-- 
Charles Gagnon                   | My views are my views and they
http://unixrealm.com             | do not represent those of anybody
charlesg at unixrealm.com        | but me.
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