[PLUG] Grub error 21 on reboot

tonyr tonyr at hevanet.com
Tue Feb 6 18:34:37 UTC 2007


Provide more info please. Grub is obviously confused about
where things are.

When you say 'reinstalled grub', what exactly did you do?
Post the / and /boot listings so we can see what kernel stuff is where.
Post the contents of /boot/grub/ and /boot/grub/menu.list

- tony

###########################################
eehouse.org wrote:
> Like a child at his birthday party I downloaded the 2.6.20 patch
> yesterday and built me a new kernel.  This caused me to reboot my
> machine for the first time since 2.6.19 was released, and it won't get
> past Grub's stage 1.5.
>
> I'm running Debian Testing on a 4-year-old IBM desktop.  Only one hard
> drive.  I haven't messed with Grub or any other config since the last
> reboot, but have run 'apt-get upgrade' every other day or so.
>
> I booted off an Ubuntu Live CD (5.10, the latest I have).  'fdisk -l'
> has nothing bad to say about my drive.  I mounted / and chrooted to it
> then reinstalled Grub (on (hd0,0), hd0 being the only choice it offers
> and hda1 being where I have /).  Grub claims success, but the same
> error shows up on reboot.  I'm now trying to 'apt-get install lilo'
> (still chrooted), but can't get it from the server.  I don't know if
> that's because I'm chrooted from a live cd or just the occasional
> unavailability I've been seeing from Debian's servers recently.
>
> Can anyone suggest what's wrong here?  Googling for this error suggest
> that it normally happens when the stage-1 MBR and later files are on
> different HDs and one of 'em's missing.  That's not the case here.  As
> far as I can tell all of the files are present and intact.  Clearly
> part of the MBR is ok since stage-1 is running off of it.  I don't
> know how to test the integrity of my entire MBR.  Grub at least thinks
> it's ok when it installs.
>
> Any suggestions how to proceed?
>
> Thanks,
>
> --Eric
>   



More information about the PLUG mailing list