Re: : Grub2 made my systeum unbootable
On 21 Jul 2009, Florian Kriener wrote:
> On Tuesday 21 July 2009 19:16:34 Anthony Campbell wrote:
> > > Don't remember now about the boot message from grub, need to look, but if
> > > it says grub instead of grub 2 in may be that the files installed are
> > > from grub2 but the boot sector itself is grub ...
> > I think this may be what happened. The first time I booted after the
> > change to grub2 it was OK, but there was a message at the top saying I
> > could or should do "update-grub--- something or other" to install it in
> > the boot sector. I did that and then the problem appeared. I'm trying
> > to find a way back but I fear the worst.
> Don't worry, it's just the boot manager. My guess would be, that Grub 2 is not
> installed in the MBR, but Grub 1. And after running update-grub you removed
> all Grub 1 modules and replaced them with Grub 2 modules. This indeed tends to
> break the boot manager.
> Since you said you have a rescue system at hand it should be quite easy to
> bring your system back up. First boot into your rescue system, mount your file
> systems to /target or whatever, bind mount /dev and /proc into it (just for
> reference: mount -o bind /dev /target/dev) too and chroot into it (chroot
> /target bash -i, or the like). Then run grub-install /dev/sda (or whatever
> discs MBR you want to install it to) and update-grub. Check that device.map is
> correct (if not correct it and rerun grub-install and update-grub). Check
> grub.cfg too, just to be sure and reboot.
> Feel free to ask again, if this did not work. It might be that I forgot
Thanks, Florian; worked like a charm! I didn't even need to do the
chroot stuff because the Debian install disk mounts the file system for
you in recovery mode.
Anthony Campbell - firstname.lastname@example.org
Microsoft-free zone - Using Debian GNU/Linux
http://www.acampbell.org.uk (blog, book reviews,
and sceptical articles)