I ran preupgrade on an ancient Thinkpad T20
which was running Fedora-8.
(I hadn't used it for a year or so.)
Preupgrade seemed to run OK,
but when I re-booted for the second time
(ie after installing the upgrade)
I got the dreaded GRUB message,
which I take to mean that the grub installation
has got itself screwed up in some way.
I got out my trusty Knoppix-5.1 CD,
which saw everything on my hard disk clearly,
mounted /dev/hda8 as /mnt/hda8 and /dev/hda2 as /mnt/hda8/boot ,
and chroot-ed to /mnt.hda8 .
But when I ran
#grub
#grun> root (hd0,1)
I got the message
Error 21: Selected disk does not exist
To cut a long story short, when I ran
#/mnt/hda8/sbin/grub
I no longer got this message, and was able to install grub with
#setup (hd0)
Just a story, with no moral.
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