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Old 07-24-2007, 10:27 AM   #1
anil3
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Registered: Mar 2006
Location: Norway
Distribution: Fedora
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Boot failure after installing a new HDD


Hello.

I've just added a new HDD to my FC5 system.

The mechanics went fine and the system rebooted without problems.

After boot I checked my graphical LVM and managed to initialice my HDB into the excisting volume (VolGroup01). When doing a df -h I could se no change so i reasoned that I had to partition the disk and do a format on it.

I therefore did fdisk /dev/hdb -> n -> p1 and finalized with a w for write. everythink ok so far.

Then I mkfs.ext3 -L /home2 /dev/hdb1, everythink went smooth.

Finally I did what I think was the error:
I added LABEL=/home2 ext3 defaults 1 2 to my fstab file.

When I rebooted after that all I got was a lot of crap that goes:
Couldn't find all physical volumes for volume group VolGroup01.
Couldn't find device with uuid '1nTtF0-12p2-wsxD-Ow4G-Nw10-b3TX-ukfLrQ'.
VolumeGroup01 not found
These lines are repeated a few times then:
Unable to find voulme group "VolGroup01"
Unable to access resume device (/dev/VolGroup01//LogVol01)
mount: could not find filesystem '/dev/root'
setuproot: moving /dev failed: no such file or directory
setuproot: error mounting /proc: no such file or directory
setuproot: error mounting /sys: no such file or directory
switchroot: mount failed: no such file or directory
Kernel panic - not syncing: Attempt to kill init!

So here I am, scratching my head.
Is there a simple way of booting the system to access my fstab file to undo these changes? And will it help?

Any help will be highly appreciated.
 
Old 07-24-2007, 11:58 AM   #2
PTrenholme
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I think that when you formatted (using mkfs.ext3 /dev/hdb1 as an ext3 fs, you probably destroyed the LV information on hdb. (LVs can only be accessed (and formatted) from /dev/mapper/<VG Name>_<LV Name>, not /dev/hd<anything>.)

To do what you seem to want to do, I believe you have to create and format the physical volume before you add the physical device to the volume group. I don't see why you're bothering to add the new drive to your existing volume group, since (from what you put into your /etc/fstab) you're planning to use the new device as a separate entry in the root file system, not as free space in your existing VG. Although your LABEL=/home2 line fails to specify any mount-point between the home2 and ext3, so it is, I think, an invalid entry as you presented it. (Perhaps just a typo, eh?)

You could try booting linux rescue and using LVM to remove the (probably bad) PV from the VG, which should get you a bootable system again, and then add the PV back into the VG. (Note that adding the PV to the VG will change the partition type of the PV to the LVM partition type, so accessing that PV as a device will cause errors because the partition type is no longer compatible with that expected by the direct access tools. That's why you'll need to go through the device mapper.)
 
Old 07-26-2007, 03:02 AM   #3
anil3
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Registered: Mar 2006
Location: Norway
Distribution: Fedora
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I managed to rescue the system

I booted with a rescue CD, and removed hdb1 from the system. I then managed to boot into my system as far as I could edit my fstab and remove the line concerning hdb.
After that everything was back to normal.

Thanks for you help, I really appreciated your effort.
 
  


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