http://www.maruko2.com/mw/CentOS_%E3%81%A7_LVM_%E7%89%A9%E7%90%86/%E8%AB%96%E7%90%86%E3%83%9C%E3%83%AA%E3%83%A5%E3%83%BC%E3%83%A0%E3%82%B5%E3%82%A4%E3%82%BA%E3%82%92%E7%B8%AE%E5%B0%8F%E3%81%99%E3%82%8B#.E7.89.A9.E7.90.86.E3.83.9C.E3.83.AA.E3.83.A5.E3.83.BC.E3.83.A0.E3.81.AE.E3.82.B5.E3.82.A4.E3.82.BA.E3.82.92.E7.B8.AE.E5.B0.8F