LVM
TODO ... DOCUMENT THIS ...
here's commands
pvcreate /dev/sda1 /dev/sdb1
vgcreate vol_group_name /dev/sda1 /dev/sdb1
lvcreate -l 95%FREE -n drive_name vol_group_namepvscan
pvdisplay
vgdisplay
lvdisplayMount lvm
sudo pvscan                 
sudo vgscan                 
sudo vgchange -ay           
sudo lvscan    
sudo mount /dev/VolGroup00/LogVol00 /mnt