On Wed, Dec 5, 2012 at 8:40 AM, Marcus Blumhagen <marcus.blumha...@web.de> wrote:
> Please CC me on reply, since I am not subscribed to the list. I consider rude not to subscribe to a list asking for help - but that's just me... > just recently I was faced with a non-booting remote box running Debian 6.0 > (Squeeze). Lacking access to any kind of console, I was quite clueless why > it wouldn´t come up after what should have been a routine reboot. I have > access to a rescue system though, which, when requested from the provider, > reboots the machine into a live system. > Now I think I have found the problem in grub-legacy trying to boot of > /dev/md0 which indeed is my boot partition: > > # Excerpt of grub´s menu.lst > > title Debian GNU/Linux, kernel 2.6.32-5-amd64 > root (md0) # software raid1 consisting of /dev/sd[ab]1 > kernel /vmlinuz-2.6.32-5-amd64 root=/dev/md1 ro > initrd /initrd.img-2.6.32-5-amd64 > > note that grub´s root is set to (md0) by update-grub. I am not entirely sure > but I thought that wasn´t possible with grub-legacy. I might be wrong > though. > However changing the menu.lst manually to use (hd0,0) as root for grub > finally fixed the machine to boot successfully again, after some very > frustrating attempts to find the cause of the problem. > > Now, I honestly don´t know how it has worked before, not knowing if the > menu.lst always pointed grub-legacy to (md0). I haven´t found a conclusive > answer to whether grub-legacy is capable of using raid1 as root or not, > since what documentation I have found online was either about grub2 or not > clearly distinguishing between the two grub versions. I've just skimmed through your message and I'll have to reread the rest when I have more time to see if I can help but regarding the above: grub-legacy can boot from an mdraid "/boot" and/or "/". The "root" of "root (md0)" is the device corresponding to "/boot". (I wish that it'd been called "grubroot" in both grub1 and grub2. Too much navel-gazing going on...) The "root" of "kernel /vmlinuz-2.6.32-5-amd64 root=/dev/md1 ro" is the device corresponding to "/". The two "root" are of course the same, expressed differently, if "/" and "/boot" are on the same partition. Since you're using grub-legacy and might be using update-grub and the "DEBIAN AUTOMAGIC KERNELS LIST" system, make sure that "groot" in "/etc/boot/menu.lst" is set to the right value. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAOdo=Sx8NhKx=plzu8jtmnwjjgizbspwqdp+npw3pnbjum6...@mail.gmail.com
