linux系统中删除逻辑卷

在生产环境中想要重新部署LVM或者不再需要使用LVM时，则需要执行LVM的删除操作。为此，需要提前备份好重要的数据，

然后依次删除逻辑卷、卷组、物理劵设备，顺序不可颠倒。

 

1、查看物理劵、卷组、逻辑卷

[root@linuxprobe dev]# pvdisplay | head -n 3
  --- Physical volume --- PV Name /dev/sdb VG Name vgtest1 [root@linuxprobe dev]# vgdisplay | head -n 3
  --- Volume group --- VG Name vgtest1 System ID [root@linuxprobe dev]# lvdisplay | head -n 3
  --- Logical volume --- LV Path /dev/vgtest1/lvtest1 LV Name lvtest1

 

2、卸载逻辑卷的挂载

[root@linuxprobe dev]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/rhel-root         18G  2.9G   15G  17% / devtmpfs 985M 0  985M   0% /dev tmpfs 994M 80K 994M 1% /dev/shm tmpfs 994M 8.8M  986M   1% /run tmpfs 994M 0  994M   0% /sys/fs/cgroup /dev/sda1                    497M  119M  379M  24% /boot /dev/sr0                     3.5G  3.5G     0 100% /run/media/root/RHEL-7.0 Server.x86_64 /dev/mapper/vgtest1-lvtest1   93M  1.6M   85M   2% /linuxprobe [root@linuxprobe dev]# umount /linuxprobe/  ## 卸载 [root@linuxprobe dev]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/rhel-root   18G  2.9G   15G  17% / devtmpfs 985M 0  985M   0% /dev tmpfs 994M 80K 994M 1% /dev/shm tmpfs 994M 8.8M  986M   1% /run tmpfs 994M 0  994M   0% /sys/fs/cgroup /dev/sda1              497M  119M  379M  24% /boot /dev/sr0               3.5G  3.5G     0 100% /run/media/root/RHEL-7.0 Server.x86_64

 

3、删除逻辑卷

[root@linuxprobe dev]# lvremove /dev/vgtest1/lvtest1 Do you really want to remove active logical volume lvtest1? [y/n]: y Logical volume "lvtest1" successfully removed

 

4、删除卷组（不需要绝对路径）

[root@linuxprobe dev]# vgremove vgtest1 Volume group "vgtest1" successfully removed

 

5、删除物理劵

[root@linuxprobe dev]# pvremove /dev/sdb /dev/sdc Labels on physical volume "/dev/sdb" successfully wiped Labels on physical volume "/dev/sdc" successfully wiped

 

6、查看物理劵、卷组、逻辑卷

[root@linuxprobe dev]# pvdisplay | head -n 3 ## 默认的？？？
  --- Physical volume --- PV Name /dev/sda2 VG Name rhel [root@linuxprobe dev]# vgdisplay | head -n 3
  --- Volume group --- VG Name rhel System ID [root@linuxprobe dev]# lvdisplay | head -n 3
  --- Logical volume --- LV Path /dev/rhel/swap LV Name swap