Re: Can't reboot after power failure (RAID problem?)

[davidg@alcor.concordia.ca]

I posted in a panic and left out a lot of details.  I'm using Squeeze, and
set up the system about a month ago, so there have been some upgrades.  I
wonder if maybe the kernel or Grub was upgraded and I neglected to install
Grub again, but I would expect it to automatically be reinstalled on at
least the first disk.  If I remove either disk I get the same error
message.

I did look at /proc/cmdline.  It shows the same uuid for the root device
as in the menu, so that seems to prove it's an MD device that isn't ready
since my boot and root partitions are each on MD devices.  /proc/modules
does show md_mod.

David

---------------------------- Original Message ----------------------------
Subject: Can't reboot after power failure (RAID problem?)
From:    davidg@alcor.concordia.ca
Date:    Mon, January 31, 2011 10:18 am
To:      debian-user@lists.debian.org
--------------------------------------------------------------------------

My system went down because of a power failure, and now it won't start.  I
use RAID 1, and I don't know if that's related to the problem.  The screen
shows the following.

Loading, please wait...
Gave up waiting for rood device.  Common problems:
- Boot args (cat /proc/cmdline)
  - Check rootdelay- (did the system wait long enough?)
  - Check root- (did the system wait for the right device?
- Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/47173345-34e3-4ab3-98b5-f39e80424191 does not exist.
Dropping to a shell!

I don't know if that uuid is an MD device, but it seem likely.  Grub is
installed on each disk, and I previously tested the RAID 1 arrays by
unplugging each disk one at a time and was able to boot to either.

Ideas?

David