- 删除逻辑卷前备份数据
- 逻辑卷删除顺序为逻辑卷、卷组、物理劵，不可颠倒
1、查看系统中当前的逻辑卷
[root@PC1linuxprobe /]# lvscan
ACTIVE '/dev/rhel/swap' [2.00 GiB] inherit
ACTIVE '/dev/rhel/root' [17.51 GiB] inherit
ACTIVE '/dev/vg1/lv1' [100.00 MiB] inherit
ACTIVE '/dev/vg1/lv2' [300.00 MiB] inherit
2、查看逻辑卷挂载情况
[root@PC1linuxprobe /]# 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 140K 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/vg1-lv2 283M 2.1M 262M 1% /lvmounttest
3、卸载逻辑卷
[root@PC1linuxprobe /]# umount /lvmounttest
4、删除逻辑卷
[root@PC1linuxprobe /]# lvscan
ACTIVE '/dev/rhel/swap' [2.00 GiB] inherit
ACTIVE '/dev/rhel/root' [17.51 GiB] inherit
ACTIVE '/dev/vg1/lv1' [100.00 MiB] inherit
ACTIVE '/dev/vg1/lv2' [300.00 MiB] inherit
[root@PC1linuxprobe /]# lvremove /dev/vg1/lv1
Do you really want to remove active logical volume lv1? [y/n]: y
Logical volume "lv1" successfully removed
[root@PC1linuxprobe /]# lvremove /dev/vg1/lv2
Do you really want to remove active logical volume lv2? [y/n]: y
Logical volume "lv2" successfully removed
[root@PC1linuxprobe /]# lvscan
ACTIVE '/dev/rhel/swap' [2.00 GiB] inherit
ACTIVE '/dev/rhel/root' [17.51 GiB] inherit
5、删除卷组
[root@PC1linuxprobe /]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "rhel" using metadata type lvm2
Found volume group "vg1" using metadata type lvm2
[root@PC1linuxprobe /]# vgremove vg1
Volume group "vg1" successfully removed
[root@PC1linuxprobe /]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "rhel" using metadata type lvm2
6、删除物理劵
[root@PC1linuxprobe /]# pvscan
PV /dev/sda2 VG rhel lvm2 [19.51 GiB / 0 free]
PV /dev/sdb lvm2 [20.00 GiB]
PV /dev/sdc lvm2 [20.00 GiB]
PV /dev/sdd lvm2 [20.00 GiB]
Total: 4 [79.51 GiB] / in use: 1 [19.51 GiB] / in no VG: 3 [60.00 GiB]
[root@PC1linuxprobe /]# pvremove /dev/sdb /dev/sdc /dev/sdd
Labels on physical volume "/dev/sdb" successfully wiped
Labels on physical volume "/dev/sdc" successfully wiped
Labels on physical volume "/dev/sdd" successfully wiped
[root@PC1linuxprobe /]# pvscan
PV /dev/sda2 VG rhel lvm2 [19.51 GiB / 0 free]
Total: 1 [19.51 GiB] / in use: 1 [19.51 GiB] / in no VG: 0 [0 ]
总结，完整删除逻辑卷步骤：
- 卸载，示例：umount /mountpoint
- 删除逻辑卷，示例：lvremove /dev/vgname/lvname
- 删除卷组，示例：vgremove vgname
- 删除物理劵，示例：pvremove /dev/disk*
注：
- 逻辑卷部署顺序：物理劵→卷组→逻辑卷
- 逻辑卷删除顺序：逻辑卷→卷组→物理劵