superblock probe failed

Cavka · 09-30-2007, 07:52 AM

Hi,

I am trying to compile a new kernel on my Toshiba Satellite A210-14S laptop and get this error msg while booting:

Code:

(1,1):ocfs2_fill_super:561 ERROR: superblock probe failed!
VFS: Cannot open root device "sdb4" or unknown-block(8,4)
Please append a correct "root=" boot option; here are the avaliable partitions:
0300     4194302   hda driver: ide-cdrom
0800        8192   sda driver: sd
0810   156290904   sda driver: sd
  0811      153600   sdb1
  0812    52433343   sdb2
  0813     1052257   sdb3
  0814   101225722   sdb4
Kernel panic - not syncing:
VFS: Unable to mount root fs on unknown-block(8,4)

so, what might be the problem? here is my entry in menu.lst from grub:

Code:

title           Debian GNU/Linux, kernel 2.6.22.9
root            (hd0,3)
kernel          /boot/vmlinuz-2.6.22.9 acpi=off root=/dev/sdb4
initrd          /boot/initrd.img-2.6.22.9

and my .config from kernel:

http://www.onlyfree.de/php/pasteserv...ow.php?id=3739

i have already tried almost anything I found on google...

I will be grateful for any hint

greetings

AlucardZero · 09-30-2007, 09:26 AM

post your /etc/fstab

Cavka · 09-30-2007, 01:47 PM

here is my fstab:

Code:

home:/home/cav# cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
/dev/sda4       /               reiserfs notail          0       1
/dev/sda3       none            swap    sw              0       0
/dev/hda        /media/cdrom0   udf,iso9660 user,noauto     0       0
/dev/sda2       /win            ntfs    defaults        0       0

i have tried adding root=/dev/sda4 too but got the same error msg.

Greetings

makuyl · 09-30-2007, 02:46 PM

Looks like you should change sda to sdb in fstab, but first post /boot/grub/device.map as well.

Cavka · 09-30-2007, 02:51 PM

it works with sda with the standard debian kernel, just when i try to start my own kernel it shows me that my hdd is sdb instead of sda... anyway here is my device.map:

Code:

cav@home:~$ cat /boot/grub/device.map
(hd0)   /dev/sda

I will try changing it to sdb.

update: nope, still the same err

makuyl · 10-01-2007, 11:16 AM

Do you have any bios settings for the hd's that might confuse udev and grub? Is LBA set in the BIOS?
How did you set your kernel options since you have a lot of drivers included in the kernel? Did you start by copying an old config from under /boot/ and do a "make oldconfig"?
Did you try booting without an initrd? You can comment it out by editing grub while booting.
Do you have another "root=" option set in grub above the kernel stanzas?