[nycbug-talk] Rescuing an OpenBSD 3.0 System
Fri Aug 5 16:10:26 EDT 2005
* Jonathan Vanasco <jvanasco at mastersofbranding.com> [2005-08-05 15:44]:
> We had a power flicker last week that seemed to have knocked out one
> of our UPS regulators and everything on it.
> I thought everything was moved over and happy on a new regulator
> until i walked into the office this morning -- our firewall was in a
> constant reboot cycle.
> It's an eracks.com box w/ a ecs p6stmt rev 1.0 motherboard, running
> openbsd 3.0
> It does one of two things:
> boots about 20seconds into openbsd, then reboots
> boots about 5 seconds into bios, then reboots
> I tried booting off a cd. if it doesn't reboot automagically, it
> does when i issue a command on the shell.
> I swapped in the one bar of like memory i could find -- no luck
> I plugged/unplugged every card in the box -- no luck
> I'm guessing the bios got screwed by a power surge (although that
> doesn't explain why it started rebooting overnight - it was fine last
> I'm at a loss of what to do - i tried tossing the drives into the
> other boxes i have in the office, but then i get
> Using Drive: 0 Partition: 3
> reading boot...
> Bad magic
> Which google says is something that I really don't want to see.
> barring a miracle, i need to get a new firewall
> the downed machine has all of the local networking stuff -- firewall,
> lan, proxy stuff -- which i need to get off -- we never backed it up,
> and there's too much to rewrite
> does anyone have a suggestion to make my week less of a nightmare?
Sounds like a bad disklabel.
Sit down and breath slowly.
When you are OK, go find a copy of scan_ffs - a disklabel recovery tool, written
by some OpenBSD guys. My candidate for the BEST BUTTSAVER award.
You may need to transfer the disk to a working system to use it. It might
also be on a rescue CD or live-CD. Check around.
I was able to use this tool to recover my FreeBSD disklabel even after I had tried
recreating it by hand - a mistake as it turned out.
Hope this helps,
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