fdisk -l
fdisk /dev/sda2?
-->p
-->n
-->p
->
->
-->3
-->w
reboot
fdisk -l
vgdisplay #find volume group name
vgextend [volume group] /dev/sdaX
vgdisplay [volume group] | grep "Free"
lvextend -L+120G /dev/[volum group]/root
xfs_growfs /dev/[volum group]/root
df -h