Re: Cannot mount old drive with LVM partition - help!

On Sun, 01 Oct 2006 21:03:51 +0000, Ohmster wrote this:

Bit Twister <BitTwister@xxxxxxxxxxxxxxxx> wrote in
news:slrnei0a28.3hf.BitTwister@xxxxxxxxxxxxxxx:

I picked custom or manual or some such option when I installed fc5 on my
multi-boot system. That allowd me to make partitions for fc5. I picked
ext3 for new partition creation and created mount points for the others.

grep LABEL etc/fstab
LABEL=/fc5 / ext3 defaults
1 1 LABEL=/2006 /2006 ext3 defaults
1 2 LABEL=/2006oe /2006oe ext3
defaults 1 2 LABEL=/accounts /accounts ext3 defaults
1 2 LABEL=/kubuntu /kubuntu
ext3 defaults 1 2 LABEL=/free_9b /free_9b
ext3 defaults 1 2 LABEL=/local/opt
/local/opt ext3 defaults 1 2 LABEL=/site
/site ext3 defaults 1 2 LABEL=/tmp
/tmp ext3 defaults 1 2
LABEL=/ubuntu /ubuntu ext3 defaults
1 2

That's good to know bit. I think that the worst of the worst has happened.
I was looking at logical volume groups in webmin and tried to make a new
one, from my /dev/hdb2 partition. I started the process and noticed at the
bottome "all data will be lost" and quickly stopped the process.

I then halted the system, connected my FC3 drive, booted, and kept my
fingers crossed. Kernel panic. No linux partions found. I can see with
fdisk -l /dev/hdb that the partitions are still there, and partition 2 is
an lvm volume, but how to access it now. That was all my stuff, everything
that I had saved! <sob!>

Looks like I am commited now to FC5 and have no choice but to move ahead.
I did try to rename the FC3 lvm to VolGroup01 instead of VolGroup00 like
it was and got a device busy result. Now when I go back into webmin and
check logical volume managment, I can see two volume groups, 00 and 01 and
01 is on /dev/hdb2, my old FC3 install! I see that there is one physical
volume present, /dev/hdb2 and it is 190Gb in size, that is it, my FC3
install. But over in the Logical Volumes, the group has no logical volumes
yet. I know that the volume is there, I just screwed it up but how to get
it back? I really, really need this badly and am afraid to lose it
altogether. There has to be a way to recover this logical volume somehow,
at least it has a different volume group now, 01 instead of the 00 that
the current system resides on.

Oh man somebody help. Bit, where can I post for help with this? Are there
any good newsgroups for linux volume group recovery?

Man of man. First thing you should do is before upgrade is backup
important stuff first.
$ Tar -xzcf ~/lessthan_DVDsize.tar.gz /abunchofdirectoriesunder4gig

K3b ~/lessthan_DVDsize.tar.gz files to a couple of DVD-RWs

Second do not panic.
With FC3 as the primary system, boot from the FC5 DVD

boot: linux rescue
# you get the prompt

$ chroot /mnt/sysimage

$ ls ~

# you should still see your data

If you can see your data then you can disconnect the FC3
and reinstall FC5 without the LVM.

Like I said go through the manual
create partition menu and delete the Logical Volume partitioning.

Then you should at least have one partition for /


Then complete the FC5 installation.

After that completes you should be able to reconnect the FC3 drive
$ mount -t ext3 /dev/hdb1 /mnt/fc3sys

$ cp -a /mnt/fc3sys/home/Ohmster /home

$ cp -a /mnt/fc3sys/usr/(directories not already on FC5) /usr

After you've cp'd all the data to the FC5 system

My FC5 installation wouldn't create a swap partition but it's ok you don't
need one and you can dd a swapfile, mkswap and swapon if you need one
later. Like LVM nice but not necessary for low user systems.

I'd disconnect the FC3 drive, reboot to make sure the FC5 has everything
and works properly.

Then you can do what you want with the FC3 drive and even "dread" install
LVM on both drives.

As soon as I figure out how to install my second hd in this pc without
removing the cpu fan, I plan to use LVM.

I think using Webmin instead of commandline LVM commands you inadvertently
ran pvcreate on hdb1 which I mentioned you should not do. Perhaps I
should have said never run LVM create anything on hdb?


.

Relevant Pages

  • lost my FC5 LVM volumes
    ... Since I wanted to leave my FC5 intact and dual-boot, I was using the Ubuntu LVM tools to set up LVM and walked on the FC5 LVM headers or whatever they are called. ... In fact, I just rebooted the system and was back where I had started with the additional benefit of an extra 60Gb of disk space, because now I had the extra partition properly included. ...
    (Fedora)
  • Re: Cannot mount old drive with LVM partition - help!
    ... When you bott into FC3, do a df, then you should see the device name ... of the LVM you are using. ... In FC5, /dev/mapper only shows the current volume ... Yeah I converted to doublespace, ...
    (alt.os.linux)
  • Re: Cannot mount old drive with LVM partition - help!
    ... physical volume using hdb and wrote to the partition messing up your ... You can try booting the FC5 as primary then lvscan the FC3 on ... on hdb is the boot partition, partition 2 on hdb is the LVM where my ...
    (alt.os.linux)
  • LVM trouble?
    ... I have an FC3 system, that was happy, but is now unhappy. ... I booted off of an FC3 rescue cd, and found that I could mount the /boot ... partition, but I cannot mount the / partition. ... commands that identified two lvm volumes on the system. ...
    (Fedora)
  • Re: Recovering a folder on an LVM ext3 partition
    ... you would just do a conventional extended partition, ... Doesn't make any sense to me either, especially since I installed FC5 on ... The installer then went and put the lot into a LVM volume ... My take is that it would be best to stick with standard partitioning ...
    (comp.sys.ibm.pc.hardware.storage)