Ubuntu and LVM

install packages
sudo apt-get install lvm2 dmsetup mdadm reiserfsprogs xfsprogs

find your LVMs if exists
sudo vgchange -ay

you can see with
sudo lvdisplay

if you get something like
No program "lvdisplay" found for your current version of LVM
(lvdisplay is you program name)

you should do this:
sudo cp -r /lib/lvm-200/ /lib/lvm-0

now you can mount