Am Freitag, den 24.08.2007, 19:42 +0100 schrieb Mick: > On Friday 24 August 2007, Marc Joliet wrote: > > Hi, > > > > After the reboot following my daily upgrade from yesterday - during > > which a revised kernel was installed - GRUB just wouldn't finish > > starting. It's attempt to start looked like this: > > > > GRUB _ > > > > with the underscore blinking. Ctrl-alt-del (reboot) worked. > > At that stage you should have checked if the symlink /boot/grub/menu.lst is > still there and, or if its permissions were messed up.
Yes, I should have. I know it was there, though, since I mounted /boot/ in the live-CD to check if I had made a typo. However, I doubt that was the problem, since I copied the menu.lst for inclusion in the grub.iso and it worked. Note that on my System menu.lst is a Symlink to grub.conf. If this isn't standard Gentoo, please let me know. Also, does grub> root (hd0,5) grub> setup (hd0) touch anything other than the MBR and stages if you already have a boot partition installed? Of course, I didn't keep record of grubs output, so, yeah... there goes all potentially useful information. However, could it be related to bug 189934? Reading through the linked bug 132135, I "switched" /lib and /lib64, so instead of /lib64 being a Symlink to /lib, /lib is now a Symlink to /lib64. > > Now, to make it clear, I solved that: after finding out that I could > > make a bootable GRUB CD, I made one from within a live-CD (c't > > Knoppicillin 5.2). I was then able to boot into Gentoo with it and > > reinstalled GRUB into the MBR. Don't you just love GRUB ;-)? > > > > What I *do* want to know, however, is how the hell the MBR could have > > been wrecked in the first place. > > I doubt that the MBR was wrecked, because if it were wrecked you wouldn't see > the Grub prompt and would just get a BIOS message. Heh, that's obvious *blushes*... However, I didn't really mean "completely hosed". Could it have been a broken stage1 that only started in part, or the like? > > All I did was install the new > > kernel/initramfs via > > > > $ genkernel --lvm2 --symlink --install all [1] > > > > , edit grub.conf appropriately and reboot. It worked flawlessly > until > > now. Is Genkernel known to cause anything like this? > > Sorry, can't help with this because I have no genkernel > experience . . . OK. I don't think it was Genkernel, anyway. > > Also, just to understand the issue better, am I correct in assuming that > > GRUB *always* installs its stage1 into the MBR or a boot sector (unless > > you install it onto a floppy or CD)? I know it's a stupid question, but > > I want to be sure that it was in the MBR in the first place, in the > > event that there was a completely different cause. If it helps, this was > > originally a Sabayon 3.20 install. A lot has changed since the initial > > install, though ;-). > > I have no experience with Sabayon either, but Grub will install wherever you > tell it to install. That can be in the Master Boot Record (e.g. system > (hd0,0) or in any partition's boot record (e.g. system (hd0,1). OK, so nothing new, then. I just mentioned Sabayon in the event there was a known problem with how it set up GRUB. Because then I could have found out if it was the MBR or not. I did just check the Sabayon Bugzilla for bugs related to GRUB and MBR and found nothing relevant. Oh well. > > Of course, it could just be random disk corruption, but I sure hope not. > > It could be a semi-random fs corruption, if e.g. you run out of juice, or > there was a hard crash, while that file was being read/written. If > your /boot is not mounted by default then that's probably unlikely. If the > machine is a laptop, or someone kicked the box while the disk was spinning > then things could go bad this way too. Yeah, I should have set noauto the instant I found out about it. Any other recommended mount options? Right now they are defaults,noauto,user_xattr 1 2 which is how it was installed (except for noauto, of course). Thanks for the info, Marc Joliet -- "Of course, I could switch back to Windows. At least there, if I have a problem, I'm not under the illusion that I could ever fix it." - Unknown (paraphrased)
signature.asc
Description: Dies ist ein digital signierter Nachrichtenteil
