A while back, I started experimenting with Ubuntu after playing withFedora. I decided to jump to Ubuntu and needed to move data from the Fedora-managed logical volume to Ubuntu. Here's what I did.

1. Boot Ubuntu.
2. Install lvm2:

   $ sudo apt-get install lvm2
   

3. Load the necessary module(s):

   $ sudo modprobe dm-mod
   

4. Scan your system for LVM volumes and identify in the output the volumegroup name that has your Fedora volume (mine proved to be VolGroup00):

   $ sudo vgscan
   

5. Activate the volume:

   $ sudo vgchange -ay VolGroup00
   

6. Find the logical volume that has your Fedora root filesystem (mineproved to be LogVol00):

   $ sudo lvs
   

7. Create a mount point for that volume:

   $ sudo mkdir /mnt/fcroot
   

8. Mount it:

   $ sudo mount /dev/VolGroup00/LogVol00 /mnt/fcroot -o ro,user
   

9. Copied my files.