vgscan
vgchange -a y
vgdisplay This will show whats the name of the volume you want to mount
and now mount it will be something like this
Create a directory where to mount the old disk (we use  /mnt/oldhd/)
mount /dev/VolGroup01/LogVol00 /mnt/oldhd/
ÂÂÂ
ÂÂÂ