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Re: [linux-lvm] Unable to mount root fs after kernel upgrade

Jan H. van Gils wrote:

Thanks for reading this message.

I have the following problem.
I am running Debian with a 2.4.18-bf2.4 kernel and installed the LVM
packages change everythink to use LVM and it works fine.

Here is an aoutput from my df -k :
/dev/vg00/root          126931     50679     69699  43% /
/dev/hda1                15522      8125      6596  56% /boot
/dev/vg00/usr           507748    278396    203138  58% /usr
/dev/vg00/var          1032088    281092    698568  29% /var
/dev/vg00/tmp            63461        17     60168   1% /tmp
/dev/vg00/home          761623    297976    432190  41% /export/home
/dev/vg00/data         4128448   2784472   1134264  72% /export/data

Now I want to do the following:
Change the kernel version to 2.4.20-686 using the package manager from debian.

This is what I did:

apt-get install kernel-image-2.4.20-686

created a new initrd image using lvmcreate_initrd 2.4.20-686

vi /etc/lilo.conf
And added the new kernel image to lilo.conf


I runned lilo and it installed fine.

Now when I reboot the system and try to boot the new kernel I get the following
message :
Kernel panic: VFS: Unable to mount root fs on 3a:00

Somebody have any idea on how to solve this problem ?

I'm not really sure of why this problem occurs but I've been able to solve it in the past doing a rdev on the linux kernel image to indicate
that the root fs is /dev/vg00/root. man rdev should help you finding the accurate syntax. By the way I thought the problem was due to grub (since
I'm using grub instead of lilo), but it seems that's not the reason.


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