5.3. 分​​​​​​​割​​​​​​​卷​​​​​​​组​​​​​​​

在​​​​​​​本​​​​​​​示​​​​​​​例​​​​​​​中​​​​​​​，现​​​​​​​有​​​​​​​卷​​​​​​​组​​​​​​​由​​​​​​​三​​​​​​​个​​​​​​​物​​​​​​​理​​​​​​​卷​​​​​​​组​​​​​​​成​​​​​​​。​​​​​​​如​​​​​​​果​​​​​​​在​​​​​​​物​​​​​​​理​​​​​​​卷​​​​​​​中​​​​​​​有​​​​​​​足​​​​​​​够​​​​​​​的​​​​​​​未​​​​​​​使​​​​​​​用​​​​​​​空​​​​​​​间​​​​​​​，就​​​​​​​可​​​​​​​在​​​​​​​不​​​​​​​添​​​​​​​加​​​​​​​新​​​​​​​磁​​​​​​​盘​​​​​​​的​​​​​​​情​​​​​​​况​​​​​​​下​​​​​​​创​​​​​​​建​​​​​​​新​​​​​​​的​​​​​​​卷​​​​​​​组​​​​​​​。​​​​​​​

在​​​​​​​初​​​​​​​始​​​​​​​设​​​​​​​定​​​​​​​中​​​​​​​，逻​​​​​​​辑​​​​​​​卷​​​​​​​ mylv 是​​​​​​​从​​​​​​​卷​​​​​​​组​​​​​​​ myvol 中​​​​​​​分​​​​​​​割​​​​​​​出​​​​​​​来​​​​​​​的​​​​​​​，它​​​​​​​依​​​​​​​次​​​​​​​包​​​​​​​含​​​​​​​三​​​​​​​个​​​​​​​物​​​​​​​理​​​​​​​卷​​​​​​​ /dev/sda1、​​​​​​​/dev/sdb1 和​​​​​​​ /dev/sdc1。​​​​​​​

完​​​​​​​成​​​​​​​这​​​​​​​个​​​​​​​步​​​​​​​骤​​​​​​​后​​​​​​​，卷​​​​​​​组​​​​​​​ myvg 将​​​​​​​包​​​​​​​含​​​​​​​ /dev/sda1 和​​​​​​​ /dev/sdb1。​​​​​​​第​​​​​​​二​​​​​​​个​​​​​​​卷​​​​​​​组​​​​​​​ yourvg 将​​​​​​​包​​​​​​​含​​​​​​​ /dev/sdc1。​​​​​​​

[root@tng3-1 ~]# pvscan
  PV /dev/sda1   VG myvg   lvm2 [17.15 GB / 0    free]
  PV /dev/sdb1   VG myvg   lvm2 [17.15 GB / 12.15 GB free]
  PV /dev/sdc1  VG myvg   lvm2 [17.15 GB / 15.80 GB free]
  Total: 3 [51.45 GB] / in use: 3 [51.45 GB] / in no VG: 0 [0   ]