Kernel panic error

[nasmel]

when am try to boot my linux servr am getting kerner panic error as follows
my root is on an lvm partition and have seperate partition for /boot


/dev/hda :open failed:no medium found

found volume group "vol group00" using metadata type lvm2

file descriptor 3 left open
VFS: cant find ex3 file system on dev dm-0

mount :error 22 mounting ext3
mount :error 2 mounting none
switchroot : mount failed 22
umount /initrd/dev failed : 2
kernal panic -ot syncing: attempted to kill initrd

[Steven E. Protter]

Shalom,

Seems like a disk problem.

Boot the system off a rescue cd, run chroot and examine the /var/log/messages file.

SEP

[nasmel]

the disks are listed in Raid ,bt when i tried to boot the system using rescue cd its giving a message like 'cant find /dev/cciss/codop2" and exiting to shell

[dirk dierickx]

seems like the devices (disks) are not there.
when booting with a cd, check with 'dmesg' if the kernel detects disks.

[Andrew Cowan]

This sounds to me like a classic case of a tainted kernel since when you installed the OS you had to also install some extra binary-only drivers.
Many manufacturers are still guilty of this as they refuse to release an open-source version of their drivers, and therefore once you update your kernel it can no longer find the drivers.

The two possible solutions are:
Boot from an older version of the kernel
or
Boot from the install CD in rescue mode and run "mkinitrd" to rebuild your RAM disk to include the drivers.

[nasmel]

when i boot with rescue cd its not mounting he system image into /mnt/sysimage and i tied to do mkinitrd from the shell its saying that command not found

plese brief out how to use the mkinitrd from rescue mode

[nasmel]

i tried to update my installation using cds ,when i reached the disk partition window its saying that no partition table on /dev/cciss/c0d0p1 ,and all the datas will be lost ..
is thr any way to create partition table with out loosing data

[Jess Long]

Have to verified that the controller with the disks is set as the Primary controller? If there is another controller in the system that is set to primary, you will see this type of errors.

[Andrew Cowan]

Should be /sbin/mkinitrd