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Old 10-15-2003, 06:57 PM   #1
phekno
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Registered: May 2003
Distribution: Gentoo, Slackware
Posts: 75

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grub.conf and Kernel Panic!!


OK. I think I may have posted this question or one very similar to it several months ago, but I am posting it again because I now have a better grasp of Linux and think I have a better idea what I should be asking.

Anyway, yesterday I recompiled my stock RH 2.4.20-8 kernel to the newest 2.4.22. It compiled fine and I got it running with some errors (stuff I forgot to select in the config) but it did boot with no kernel panic. At this point I was using LILO. Then I decided to switch to GRUB and recompile again because of the errors I was getting. I rebooted after altering my grub.conf and I got this

VFS: Cannot open root device "LABEL=/" or 00:00
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 00:00

So then I rebooted and used the old kernel and it worked fine. Then I reinstalled LILO and rebooted. Voila! My new kernel works! But I really want to use GRUB!

My question is:
What is wrong with my grub.conf? Thats the only thing that I can think of that is wrong with this thing!

Here is my current grub.conf:

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,1)
# kernel /vmlinuz-version ro root=/dev/hda3
# initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=10
splashimage=(hd0,1)/grub/splash.xpm.gz
title Red Hat Linux (2.4.20-8)
root (hd0,1)
kernel /vmlinuz-2.4.20-8 ro root=LABEL=/ hdc=ide-scsi hdd=ide-scsi
initrd /initrd-2.4.20-8.img
title Red Hat Linux (2.4.22)
root (hd0,1)
kernel /vmlinuz-2.4.22 ro root=LABEL=/ hdc=ide-scsi hdd=ide-scsi
initrd /initrd-2.4.22.img
title DOS
rootnoverify (hd0,0)
chainloader +1

And here is what my current lilo.conf looks like:

prompt
timeout=50
default=linux
boot=/dev/hda
map=/boot/map
install=/boot/boot.b
message=/boot/message
lba32

image=/boot/vmlinuz-2.4.22
label=New
initrd=/boot/initrd-2.4.22.img
read-only

image=/boot/vmlinuz-2.4.20-8
label=linux
initrd=/boot/initrd-2.4.20-8.img
read-only
append="hdc=ide-scsi hdd=ide-scsi root=LABEL=/"

other=/dev/hda1
optional
label=DOS

Please help me. I guess I could use LILO but from what I understand.....GRUB is technically superior.

Thanks,
Phekno
 
Old 10-15-2003, 07:06 PM   #2
bulliver
Senior Member
 
Registered: Nov 2002
Location: Edmonton AB, Canada
Distribution: Gentoo x86_64; Gentoo PPC; FreeBSD; OS X 10.9.4
Posts: 3,760
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Rep: Reputation: 78
I think your problem is the ROOT label. Grub.conf and lilo.conf do not have the same syntax.

Change:
Code:
kernel /vmlinuz-2.4.20-8 ro root=LABEL=/ hdc=ide-scsi hdd=ide-scsi
To:
Code:
kernel /vmlinuz-2.4.20-8 ro root=/dev/hdax hdc=ide-scsi hdd=ide-scsi
where "/dev/hdax" is the partition where your root filesystem is mounted ie: "/". So it would likely be /dev/hda2 if you have a seperate /boot partition. I can't tell you exactly what it would be without knowing your partitioning scheme.

Change the same thing for your other kernel as well...and you should be golden.
 
Old 10-15-2003, 07:42 PM   #3
phekno
Member
 
Registered: May 2003
Distribution: Gentoo, Slackware
Posts: 75

Original Poster
Rep: Reputation: 15
Close but no cigar.

Here is what grug.conf looks like now:

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,1)
# kernel /vmlinuz-version ro root=/dev/hda3
# initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=10
splashimage=(hd0,1)/grub/splash.xpm.gz
title Red Hat Linux (2.4.22)
root (hd0,1)
kernel /vmlinuz-2.4.22 ro root=/dev/hda2 hdc=ide-scsi hdd=ide-scsi
initrd /initrd-2.4.22.img
title DOS
rootnoverify (hd0,0)
chainloader +1

(Note: I got rid of my old kernel)
I did this and when I rebooted the kernel panicked again and now it says that I need to pass an init string or something.

So I'm stuck again.
 
Old 10-15-2003, 07:48 PM   #4
phekno
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Registered: May 2003
Distribution: Gentoo, Slackware
Posts: 75

Original Poster
Rep: Reputation: 15
OK I fixed it.

/dev/hda3



Thanks for all the help!

Phekno
 
Old 10-15-2003, 11:08 PM   #5
bulliver
Senior Member
 
Registered: Nov 2002
Location: Edmonton AB, Canada
Distribution: Gentoo x86_64; Gentoo PPC; FreeBSD; OS X 10.9.4
Posts: 3,760
Blog Entries: 4

Rep: Reputation: 78
Glad it's working for you
 
  


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