On Thu, 2009-03-19 at 02:16 -0400, Gerry Reno wrote: > Gerry Reno wrote: > > Will Woods wrote: > > > > > > This is a GRUB bug that we've been unable to reproduce reliably, and > > > therefore haven't traced fully. It's often triggered by using the grub > > > --once flag, which is used by both preupgrade and suspend-to-disk > > > (hibernate). We've seen it happen with both of those things, but the > > > preupgrade case seems to be more frequent because it tends to also > > > involve upgrading GRUB at the same time. > > > > > > As far as we've been able to trace it, *something* causes GRUB stage2 > > > (or stage 1.5) to move its physical on-disk location. But we don't know > > > what. Nothing that we're doing to GRUB *should* cause that. But > > > something does, and then stage1 can't find the rest of GRUB, and we get > > > stuck with "GRUB" on-screen and an unbootable system. > > > > > > Anyway. I've spent *weeks* trying to track that one down, bugging pjones > > > (our GRUB maintainer) and esandeen (our mad ext3/ext4 hacker) endlessly, > > > and never made any real progress. Reinstalling GRUB, as you did, is the > > > proper fix when this happens. But we still don't know what causes it, > > > and therefore how to keep it from happening in the first place. This remains a problem in F10; unsure if rawhide is also susceptible. I'd guess yes. > > Ok, I just ran into this nasty little problem when I did my F9 => > > F10 preupgrade. All I get at the first reboot is the GRUB prompt. > > Has any progress been made on tracking this down? This will be a > > real pain if I have to go through this on 14 machines. Is there any > > workaround to avoid this problem? None known. You can use a rescue CD / Live image to re-run grub-install to fix it, but that's about it. > And I just reran the preupgrade and this time I see this message go > by: > Not enough space in /boot/upgrade to download install.img > GRUBBY shows that it will download the install.img from the network. > > The /boot is 100MB size on this machine. > > So I did the first reboot and this time the machine booted, retrieved > the install.img and ran anaconda. > Maybe the GRUB prompt problem is related to my small /boot space. It's not. We've seen this happen on plenty of machines with 200MB /boot. -w
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