LVM
From Alessandro's Wiki
from command line
pvdisplay
lvremove
lvdisplay
see PV
pvs PV VG Fmt Attr PSize PFree /dev/sda vg_1 lvm2 a-- 930.82g 0 /dev/sdb vg_1 lvm2 a-- 931.31g 931.31g
add a disk to a PV
vgextend vg_1 /dev/sdb Volume group "vg_1" successfully extended
delete a PV
vgremove vg_1 Volume group "vg_1" successfully removed
create a mirror
lvcreate -L 931g vg_1 -m 1 vg_1
