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Linux will not start - probably a mounting problem.

Posted on 2006-10-27
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I am newbie with Linux.

I did a terrible mistake and I hope it can be fixed easily without losing any data.

I installed FC5 and worked with it for few months.

I have the last kernel 2.6.18

I have an IDE HD (hdc1)

Few days ago I've installed a new SATA HD (I think marked as hds1).
I've created a new partition, a new logical volume and mount it. I set the mounting point to "/" ;(

The day after when I try to open the computer, the Linux boot halt at the middle with some errors "...FC5 cannot touch /var/lock/subsys/kudzu Read-only".

I tried to use the DVD in order to "upgrade" the OS. At some point I've got that its cannot find the "/" and I might have a problem with the stable file.

I am almost sure that I need to remove the new mounting point in order to make it work.

I used a live CD in order to get into hdc1.
I tried to change the ro to rw in the grub config file. nothing helped.

this is how my system looks like:

Disk /dev/hdc: 41.1 GB, 41174138880 bytes
255 heads, 63 sectors/track, 5005 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hdc1   *           1          13      104391   83  Linux
/dev/hdc2              14        5005    40098240   8e  Linux LVM
root@slax:~#


root@slax:/mnt/hdc1# ls -lh
total 8.6M
-rw-r--r-- 1 root root 834K Sep 11 05:44 System.map-2.6.17-1.2187_FC5smp
-rw-r--r-- 1 root root 861K Oct 14 21:27 System.map-2.6.18-1.2200.fc5smp
-rw-r--r-- 1 root root  65K Sep 11 05:44 config-2.6.17-1.2187_FC5smp
-rw-r--r-- 1 root root  69K Oct 14 21:27 config-2.6.18-1.2200.fc5smp
drwxr-xr-x 2 root root 1.0K Oct 27 10:31 grub/
-rw-r--r-- 1 root root 1.7M Sep 28 03:28 initrd-2.6.17-1.2187_FC5smp.img
-rw-r--r-- 1 root root 1.7M Oct 19 01:36 initrd-2.6.18-1.2200.fc5smp.img
drwx------ 2 root root  12K Mar 23  2006 lost+found/
-rw-r--r-- 1 root root 1.8M Sep 11 05:44 vmlinuz-2.6.17-1.2187_FC5smp
-rw-r--r-- 1 root root 1.8M Oct 14 21:27 vmlinuz-2.6.18-1.2200.fc5smp


Can someone help me with that. I have no idea what to do.
Please write the required steps in detail.

Many thanks,
Shay
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Question by:shy_amar
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Author Comment

by:shy_amar
ID: 17818217
BTW, you don't see the SATA HD because the I have a mother board chip that required kernel 2.6.18 to support it.
The live CD has an older kernel version.
In any case the OS was installed on the first HD (IDE)
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Accepted Solution

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Kerem ERSOY earned 2000 total points
ID: 17824166
Hi,

From your fdisk output:

Your
/dev/hdc1 is your boot  volume
and /dev/hdc2 is your LVM - Logical Volume Manager partition.

Things seems pretty normal here.

To mount your LVM partition please me sure that your livecd includes lvm2 modules:

modprobe dm-mod     (to load lvm modules into the memory  f they are not aready there. If this step fails go grab another  live distro with lvm support)
vgchange -ay
mkdir -p /mnt/VolGroup00/LogVol00
mount /dev/VolGroup00/LogVol00 /mnt/VolGroup00/LogVol00

This should bring up your settings

now go to your etc directory  (not the live CD distro your mounted root)
edit the mtab file to read :
/dev/mapper/VolGroup00-LogVol00 / ext3 rw 0 0

for the root and reboot.
 
Cheers,
K.

 
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Expert Comment

by:Kerem ERSOY
ID: 17824169
Anyway let me know what happens when you mount etc.
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LVL 30

Expert Comment

by:Kerem ERSOY
ID: 17829202
Your etc directory is found under /mnt/VolGroup00/LogVol00/etc and the contents of the mtab file should be similar to that:
 

/dev/mapper/VolGroup00-LogVol00 / ext3 rw 0 0
none /proc proc rw 0 0



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