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[solved] Sudden Kernel panic!! Please help
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_savage
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Joined: 06 Jun 2004
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Location: Redmond, WA

PostPosted: Tue Jan 04, 2005 7:28 pm    Post subject: [solved] Sudden Kernel panic!! Please help Reply with quote

Heya guys,

I haven't touched anything, really! :-) That's what happens: my primary Linux partition /dev/hda12 is XFS formatted and contains pretty much the entire system; /dev/hda13 then is auto-mounted on /data. When I rebooted today, my kernel paniced with this message

Code:
...
XFS: bad magic number
XFS: SB validate failed
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(3,9)


Root fs? That would be on my hda12 partition. So I booted from cd (the 2004.2 snapshot, I think) and checked both partitions: hda12 using xfs_repair, and hda13 using fsck. Both went through without difficulties, but the problem remains. I am able to mount/browse both partitions from the cd.

On second thought: the thing that I did change was that I installed a hardened kernel (not booting it though) and that I removed some old and unused module directories from /lib/modules. But I don't see a real connection here, because the kernel that is actually panicing is the one that has been stable for the past few weeks.

So what now????

Thanks heaps,
Jens
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Last edited by _savage on Thu Jan 06, 2005 10:16 am; edited 1 time in total
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_savage
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PostPosted: Wed Jan 05, 2005 10:35 am    Post subject: Reply with quote

Well, I remember that I changed to the cascading profiles a few days ago, and I'm not sure if I rebooted since. But that shouldn't matter, should it?

Jens
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JoseJX
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PostPosted: Wed Jan 05, 2005 9:51 pm    Post subject: Reply with quote

No, it shouldn't matter, but can you check to make sure you've got devfs or udev installed?
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_savage
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PostPosted: Thu Jan 06, 2005 2:30 am    Post subject: Reply with quote

I got udev installed. I moved from devfs to udev a while ago, and that was working fine; I often switch between OS-X and Linux so I had a fair few reboots before, and all went without problems. Anyway, udev and /dev is populated much later, I don't even get that far.

Anyway, I booted from cd, chroot'ed and recompiled the kernel and the modules: the problem still persisits!? The exact same panic...
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SnEptUne
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PostPosted: Thu Jan 06, 2005 8:20 am    Post subject: Reply with quote

Can you mount the root partition under the livecd environment. It seems like your root partition is corrupted or you misconfiged the root partition (i.e. setting root=/dev/hda13 instead of /dev/hda12).

If you can mount your root partition, you should check it for errors unmounted with:

Code:
xfs_check -v /dev/hda12

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_savage
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PostPosted: Thu Jan 06, 2005 10:18 am    Post subject: Reply with quote

Check out this thread for what went wrong. It was a bootloader problem, but a tricky one (I think) :-D

Jens
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