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

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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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