tune2fs -m 0 /dev/xvdb
http://www.linuxquestions.org/questions/slackware-14/%27df-h%27-showing-wrong-free-space-on-disk-425101/
Dicas, Tutoriais e lembretes que ajudam no dia a dia
tune2fs -m 0 /dev/xvdb
http://www.linuxquestions.org/questions/slackware-14/%27df-h%27-showing-wrong-free-space-on-disk-425101/