[SOLVED] cannot mount root fs

umarzuki · 04-24-2010, 10:09 PM

I cloned a RHEL 3 system with clonezilla and restored the image to a vmware player 3.0.1 guest. when it boot, I got kernel panic message and it says it cannot mount root fs (see attachment)

Does this means that the guest do not have vmware player's scsi controller module? How do i get this to work?

Mr-Bisquit · 04-25-2010, 05:21 AM

What are the kernel load arguments? There's no BIOS detected at all, not even virtual.
You need to mount the image and fix the boot loader.

umarzuki · 04-25-2010, 06:09 AM

Quote:

Originally Posted by Mr-Bisquit

What are the kernel load arguments? There's no BIOS detected at all, not even virtual.
You need to mount the image and fix the boot loader.

the boot parameter (as attached):
kernel /vmlinux-2.4.21-53.ELsmp ro root=LABEL=/

i also tried changing the scsi controller to ide controller and do the restoration again from the image which resulted in it cannot found /dev/sda5 (another attachment)

How do i mount the image and fix the boot loader? I already tried reinstalling GRUB but it did not work

Mr-Bisquit · 04-25-2010, 07:07 AM

Use a live cd image and do the boot order such that the vm boots from the iso and mounts the hd image.
Once that is setup, you will need to run the following commands.

Code:

$sudo -s <or> sudo su<This will get you to root>
# ls /dev <Look for hdX or sdX>
#fdisk /dev/(s or h)dX
:p
<look at the filesystem types and partitions>
:q
# mkdir /home/disk 
#mount -t <fstype> -o rw /dev/mount /home/disk
<If succesful you will see another root prompt. If not try another fstype.>
#cd /home/disk/boot/grub
<Fix menu.lst and other configuration files here.>
<When finished exit out.>

umarzuki · 04-25-2010, 07:51 AM

the hard disk informations as follows:

Code:

Disk /dev/hda: 300.6 GB, 300647710720 bytes
255 heads, 63 sectors/track, 36551 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1          13      104391   83  Linux
/dev/hda2              14         138     1004062+  82  Linux swap / Solaris
/dev/hda4             139       36453   291700237+   5  Extended
/dev/hda5             139       24454   195318238+  83  Linux
/dev/hda6           24455       36453    96381936   83  Linux

/dev/hda1: LABEL="/boot" UUID="6223abfd-b9b8-4ec4-9410-cd0ca1d4286e" TYPE="ext3" 
/dev/hda5: LABEL="/" UUID="6d4164af-1fe9-4369-8f19-0e3708494775" SEC_TYPE="ext2" TYPE="ext3" 
/dev/hda6: LABEL="/mnt/data" UUID="9701d93e-00df-47aa-9537-a727216e80dc" SEC_TYPE="ext2" TYPE="ext3"

i believe you had seen the attachment sda5.png, from that message, it tries to find /dev/sda5 instead of /dev/hda5. How do i make it otherwise? Any special grub configuration? From what i can see, it boots from /dev/hda1 alright, but when it tried to fsck /dev/sda5, bootup failed because it is not there.

Here's the menu.lst

Code:

#boot=/dev/hda
default=0
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
title Red Hat Enterprise Linux ES (2.4.21-53.ELsmp)
	root (hd0,0)
	kernel /vmlinuz-2.4.21-53.ELsmp ro root=LABEL=/
	initrd /initrd-2.4.21-53.ELsmp.img
title Red Hat Enterprise Linux ES (2.4.21-53.EL)
	root (hd0,0)
	kernel /vmlinuz-2.4.21-53.EL ro root=LABEL=/
	initrd /initrd-2.4.21-53.EL.img
title Red Hat Enterprise Linux ES (2.4.21-4.ELsmp)
	root (hd0,0)
	kernel /vmlinuz-2.4.21-4.ELsmp ro root=LABEL=/
	initrd /initrd-2.4.21-4.ELsmp.img
title Red Hat Enterprise Linux ES-up (2.4.21-4.EL)
	root (hd0,0)
	kernel /vmlinuz-2.4.21-4.EL ro root=LABEL=/
	initrd /initrd-2.4.21-4.EL.img

umarzuki · 04-25-2010, 08:03 AM

finally. I edited /etc/fstab and changed all that starts with sda to hda and that works.