[SOLVED] kernel panic !

debianD · 07-16-2009, 06:44 PM

Greetings All,
I have just completed complete gentoo installation using step by step guidelines from handbook.
I am using vmware 6 on windows.
As per the exact instructions given in hadbook,
my partitions are:

/dev/hda1 ext3 boot
/dev/hda2 swap swap
/dev/hda3 ext3 root

grub.conf is :

default 0
timeout 30
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
title Gentoo Linux 2.6.24-r5
root (hd0,0)
kernel /boot/kernel-2.6.24 root=/dev/hda3

When I boot.....

Kernel panic-not syncing :VFS unable to mount root fs on unknown-block (2,0)

Also showing me the message..

please append a correct "root=" boot option;here are the available options:
0800 10485760 sda driver:sd
0801 31626 sda1
0802 500377 sda2
0803 9953685 sda3
one more line...
and kernel panics

When I change root=/dev/sda3 from (/dev/hda3) it boots up and give this message :

fsck.ext3: No such file or directory while trying to open /dev/hda3
Superblock could not be read or does not define a correct ext2 filesystem
etc

and then asks me for root password,which I did not set.Is there any default password?
When I change root=/dev/sda3 ,it works fine when I boot in rescue mode but there the /boot/grub subdirectory is missing.
Is the problem due to Vmware,My vmware is using the virtual drive as IDE, so I have also used the drive as /dev/hda throught partition and mount.

Sorry for elaborating so much.
Help needed.

Cheers!!

i92guboj · 07-16-2009, 11:20 PM

It's obviously sda3.

It fails now at a later stage because you probably forgot to sync /etc/fstab with that as well.

In rescue mode it boots because it doesn't mount /, what you see is only a ram image, that's why it misses most of the stuff.

Finally, the password should have been set during installation. You can use passwd to set it. For that you first need to boot from a livecd, and chroot to your gentoo drive, then use passwd.

debianD · 07-17-2009, 03:54 AM

I am sending screenshots of my rescue mode..what I am confused about is..that my mount is not working..also I am using Vmware 6.5 and iso disk image.

I was suggested to do

Code:

mount /dev/sda3 /mnt/gentoo 
mount /dev/sda1 /mnt/gentoo/boot 
mount -t proc none /mnt/gentoo/proc 
mount -o bind /dev /mnt/gentoo/dev 
chroot /mnt/gentoo /bin/bash 
env-update 
source /etc/profile 
export PS1="(chroot) $PS1" 
passwd

But thats not working.
PFA of screenshots.

Cheers!!

i92guboj · 07-17-2009, 04:37 AM

It's very possible that your disk will be hda in the livecd and sda in your install, or viceversa, keep that in your mind while doing everything.

debianD · 07-17-2009, 04:47 AM

No it was hda throughout the process.
I am glad to affirm that I solved my problem.
Booted in rescue mode.
I checked ..

#mount
I founded that I was in chrooted environment so I need not to mount anything just need to edit fstab.
#mount -o remount,rw /

then edited the fstab.
Changed all hd*'s to sd*'s
save and exited

#mount -o remount,ro /

Reeboted as normal.

Things worked.

Thanks for your help.

Cheers!!