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

[Paul Howarth]

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.