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Old 08-20-2012, 06:57 PM   #1
comcastuser
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Tried to preupgrade from F16 to F17 - kernel panic... any ideas on how to fix this?


I got this error on trying to boot into F17:

"Kernel Panic - not synching: VFS: Unable to mount root fs on unknown-block (0,0)"

This is the best I could do to reproduce the text of this error, Linux won't produce a log file of the kernel panic to paste online (why not???)

I have tried the following steps to fix this:
1) I checked /boot/grub2/grub.conf and ensured that the boot UUID for F17 is the same as the previous F16's boot UUID, those are all the same and it worked before.

2) I checked /etc/fstab and nothing has changed there.

3) I went into grub at the boot process and did "ls" and found the partition is on (hd0,msdos5).

ls (hd0,msdos5)/ brought up the filesystem in question.


How do I get the kernel to mount the root fs...? Or have I discovered a completely new and unfixable problem?

Last edited by comcastuser; 08-20-2012 at 06:59 PM.
 
Old 08-21-2012, 10:01 PM   #2
terry-duell
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Registered: Jan 2007
Location: Melbourne, Australia
Distribution: Fedora 20 x86_64
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Quote:
Originally Posted by comcastuser View Post
I got this error on trying to boot into F17:

"Kernel Panic - not synching: VFS: Unable to mount root fs on unknown-block (0,0)"
[snip]
How do I get the kernel to mount the root fs...? Or have I discovered a completely new and unfixable problem?
This story <http://forums.fedoraforum.org/showthread.php?t=262786> and has a similar story to your problem. I don't think it is the complete answer but may help a bit.

Cheers,
Terry
 
Old 08-22-2012, 02:09 PM   #3
wagscat123
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Registered: Jan 2009
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Distribution: openSUSE 13.1, 13.2 and Linux Mint 17
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Have you checked initrd? Make sure you have a line in GRUB for that and make sure initrd matches you kernel.

Add
--CODE-
initrd(rootpartition)/boot/initrd
--CODE-
or
--CODE-
initrd /boot/initrd
--CODE-
if you have root set in its own line before the kernel line.
 
Old 08-22-2012, 09:07 PM   #4
R3V0LV3R
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I would be suspicious of upgrading this version - from F16 to 17 - in particular, because of the change to a unified file system. It's just one more complication, and easily avoided by a fresh install.

The install is quick.... from what I remember it was no more than about 10 minutes from a live USB.
 
  


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