unable to mount root fs...;(

[Thommy020]

Hello!

I was looking now for a few hours to solve this problem, but I never found a hint that really could help.. hope here is somebody who knows what to do...
I have installed Fedora Core 3 and wanted to build my own kernel. Configuring and building was not really a problem, I did it very slowly and added every driver or module I needed directly into it, so i need no initrd. The hard drives get detected correctly, also the partitions are listed correctly, but then occures the following message:
VFS: Cannot open root device "VolGroup00/LogVol00" or unknown-block(0,0)
Please append a correct "root=" boot-option
Kernel panic - not sysncing: VFS: Unable to mount root fs on unknown-block(0,0)

ext2 and ext3 and also reiserfs are supported by the kernel. (I left all options depending the filesystems the same as in the working standard-redhat kernel, but replaced "module" by "yes"..) I start it with the same parameters the standard-kernel from redhat has. When I replace the "VolGroup00/LogVol00" with the partition it should boot from (hdb2), the problem is the same (Cannot open root device "/dev/hdb2").

Can anyone help??;(

Thommy

[genesus]

are you getting the errors within grub or lilo at boot, or does it boot and you get the errors with everything is coming up?

[Thommy020]

Thanks for your quick response! I get these errors using GRUB. But now it already looks a bit different when I use /dev/hdb1 instead of hdb2.. sorry, I'm absolutely new to this..;(

My Grub config is:
title Fedora Core (2.6.10-1.770.FC3)
root(hd0,0)
kernel /vmlinuz-2.6.10-1.770 ro root=/VolGroup00/LogVol00
initrd /initrd-2.6.10-1.770.img #This kernel works fine!!
title Kernel 2.6.10
root(hd0,0)
kernel vmlinuz-2.6.10 ro root=/dev/hdb1

The new error message is:
VFS: Mounted root (ext3 filesystem) readonly
Freeing unused kernel memory: 252k freed
Warning: unable to open initial console
Kernel panic - not syncing: No init found. Try passing init= option to kernel

and mount says:
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/hdb1 on /boot type ext3 (rw)
none on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

Hope this helps a little bit...