Re: Help: lost LVM logical volumes on old disk after FC4 install

Paul Howarth <paul@xxxxxxxxxxxx> · Mon, 30 Jan 2006 16:04:50 +0000

Kevin Flynn wrote:

I'm seeking advice on how to recover old logical volumes that I stupidly 
lost after a FC4 install as follows:
Initial conditions

----------------------

- Had old computer running FC4

- Old computer had one disk with two partitions:   /boot and an LVM2 PV.

- The PV belonged to volume group VolGroup00, and had three logical 
volumes:

  LogVol00 (root), LogVol01 (swap), LogVol02 (home)

  (and this PV was the only PV in the group).
Then I went and did this

--------------------------------

- Got new computer (with new disk)

- Installed old disk in new computer, thinking I'll have easy access to 
my old data

- Performed custom install of FC4 on new computer

- During installer's manual partitioning phase, I defined a logical 
volume group

 on the *new* disk called VolGroup00, with three logical volumes:

 LogVol00 (root), LogVol01 (swap), LogVol02 (home)

- I then noticed that the installer had properly found my *old* disk and 
the *old*

 PV.  But the old PV was not associated to any LVM volume group

 (unlike those on the *new* disk, which were shown as belonging to 
VolGroup00).

- Then I did something like:  clicked "LVM", and created VolGroup01, which

 then appeared (in the partitioner GUI listing) next to the PV on my old 
disk.

 I thought: "OK, so my new FC installation will go on the new disk in

 VolGroup00, and my old data will still be on the old disk in VolGroup01"

 (I was careful to *not* check the "format" box).

- I then finished the FC4 installation
Now I can only find logical volumes on my new disk.  My logical volumes 
on the old

disk seem to have disappeared!
Running vgscan and lvscan:

 - on *new* disk:  finds all LVs properly

 - on *old* disk:  finds only volume group VolGroup01, but no logical 
volumes!
Running vgchange -ay doesn't yield anything different.

What's the output of "vgdisplay -v"?
Paul.
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Re: Help: lost LVM logical volumes on old disk after FC4 install

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