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Linux怎么删除LVM中PV物理卷(2)

时间: 孙胜652 分享

Linux怎么删除LVM中PV物理卷

  VG Name liuhg_disk

  PV Size 603.98 MiB / not usable 3.98 MiB

  Allocatable yes (but full)

  PE Size 4.00 MiB

  Total PE 150

  Free PE 0

  Allocated PE 150

  PV UUID JlMIAF-A49n-M6HA-ZLXf-d8nS-pfZr-YeQsKT

  --- Physical Segments ---

  Physical extent 0 to 149:

  Logical volume /dev/liuhg_disk/home

  Logical extents 75 to 224

  --- Physical volume ---

  PV Name /dev/sda11

  VG Name liuhg_disk

  PV Size 478.47 MiB / not usable 2.47 MiB

  Allocatable yes (but full)

  PE Size 4.00 MiB

  Total PE 119

  Free PE 0

  Allocated PE 119

  PV UUID xnHJNA-tDVx-dryX-KM1x-g96Y-sptI-9iUOcU

  --- Physical Segments ---

  Physical extent 0 to 118:

  Logical volume /dev/liuhg_disk/home

  Logical extents 352 to 470

  将sda6设置为离线状态:

  pvchange -xn /dev/sda6

  使用pvdisplay -m

  显示如下:

  ……

  --- Physical volume ---

  PV Name /dev/sda6

  VG Name liuhg_disk

  PV Size 203.92 MiB / not usable 3.92 MiB

  Allocatable NO 《-----表示已经关闭了该PV

  PE Size 4.00 MiB

  Total PE 50

  Free PE 0

  Allocated PE 50

  PV UUID S2ane6-nlFG-uSNR-35NP-Yxa6-cXRb-r8E8mK

  ……

  将sda6的数据移走:

  pvmove -i 1 /dev/sda6

  -i 1是每1秒钟报告一次数据迁移的进度。

  [root@liuhg /]# pvmove -i 1 /dev/sda6

  /dev/sda6: Moved: 38.0%

  /dev/sda6: Moved: 84.0%

  /dev/sda6: Moved: 100.0%

  重新用pvdisplay -m

  显示如下:

  ……

  --- Physical volume ---

  PV Name /dev/sda6

  VG Name liuhg_disk

  PV Size 203.92 MiB / not usable 3.92 MiB

  Allocatable NO

  PE Size 4.00 MiB

  Total PE 50

  Free PE 50 《----显示完全空闲和Total PE数一致

  Allocated PE 0

  PV UUID S2ane6-nlFG-uSNR-35NP-Yxa6-cXRb-r8E8mK

  ……

  从卷组里把sda6删除:

  [root@liuhg /]# vgreduce liuhg_disk /dev/sda6

  Removed “/dev/sda6” from volume group “liuhg_disk”

  pvdisplay -m再看看吧:

  --- NEW Physical volume --- 《-----还告诉你这是一个新的PV ^_^

  PV Name /dev/sda6

  VG Name 《-----空了

  PV Size 203.92 MiB

  Allocatable NO

  PE Size 0

  Total PE 0

  Free PE 0

  Allocated PE 0

  PV UUID S2ane6-nlFG-uSNR-35NP-Yxa6-cXRb-r8E8mK

  到此vgdisplay -v能看到已经没有了/dev/sda6了。重新挂载/home

  [root@liuhg /]# mount /dev/liuhg_disk/home /home

  [root@liuhg /]# df -h

  Filesystem Size Used Avail Use% Mounted on

  /dev/sda1 2.0G 546M 1.3G 30% /

  tmpfs 504M 0 504M 0% /dev/shm

  /dev/mapper/liuhg_disk-home

  2.2G 1.8G 42M 98% /home

  进去看看数据,一个都没丢。

  上面就是Linux删除LVM中的PV物理卷(硬盘或分区)的介绍了,如果你在系统中安装了LCM,而又不知道如何删除其中的PV物理卷的话,可以试试文中介绍的方法。

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