Hi,
after installing sarge and running the 2.6.7 kernel and using lvm2 (only boot not on lvm2)
all is well. I wanted to compile the 2.6.8 kernel & activate the framebuffer amongst other
things. I can compile a kernel fine it gave me a Kernel panic: VFS: Unable to mount root fs
on unknown-block(0,0)
I then restarted the whole process and copied over the config of the 2.6.7 without changing
anything, yet the resulting error is the same
"Kernel panic: VFS: Unable to mount root fs on unknown-block(0,0)"
Some more info: 1) I compiled with this line: make-kpkg --initrd --append-to-version=.07sep2004 kernel_image modules_image
then installed without problems
2) grub
title Debian GNU/Linux, kernel 2.6.8.07sept2004
root (hd0,0)
kernel /vmlinuz-2.6.8.07sep2004 root=/dev/mapper/main-lv_root ro ramdisk_size=100000
initrd /initrd.img-2.6.8.07sep2004
savedefault
boot
If first thought the error might be due to not having enough ramdisk_size or specifying the
root disk the wrong way. But it should be the same as the standard installed kernel.
* cat /proc/partitions
major minor #blocks name 3 0 14668416 hda 3 1 97744 hda1 3 2 14570640 hda2 254 0 258048 dm-0 254 1 258048 dm-1 254 2 8388608 dm-2 254 3 1048576 dm-3 254 4 512000 dm-4 254 5 258048 dm-5
* cat /proc/devices Block devices: 1 ramdisk 3 ide0 22 ide1 254 device-mapper
* ls -la /dev/mapper/main-lv_root brw------- 1 root root 254, 0 Sep 3 19:16 /dev/mapper/main-lv_root
* perl -e 'printf "%02x\n", 254' -> fe
So i tried using fe00 as the root device in grub but that doesn't work either
as i then get this error:
Kernel panic: VFS: Unable to mount root fs on unknown-block(254,0)
I then tried something like this as kernel line:
kernel /vmlinuz-2.6.8.07sep2004 ro root=fe00 devfs=mount ramdisk_size=100000
because i thought that maybe devfs was to blame but again, no go.
So why is this kernel unable to load the root file system while it has the same
config as the standard kernel?
Thanks, Benedict
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