Linux LVM学习总结——删除卷组VG

在Linux系统中，如何删除一个卷组（VG）呢？ 下面我总结了一下如何删除卷组（VG）的具体步骤，仅供参考，如有不足，敬请指出。谢谢！在下面的例子中，我想删除卷组VolGroup05。

步骤1： 查看卷组（VG）相关信息，如下所示

[root@getlnx01uat ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

 97G 36G 57G 39% /

/dev/mapper/VolGroup01-LogVol00

 79G 33G 43G 44% /u01

/dev/mapper/VolGroup02-LogVol00

 197G 182G 5.4G 98% /u02

/dev/mapper/VolGroup03-LogVol00

 197G 57G 130G 31% /u03

/dev/mapper/VolGroup04-LogVol00

 138G 118G 14G 90% /u04

/dev/mapper/VolGroup05-LogVol00

 178G 48G 121G 29% /u05

/dev/sda1 99M 23M 71M 25% /boot

tmpfs 2.0G 0 2.0G 0% /dev/shm

[root@getlnx01uat ~]# vgscan

 Reading all physical volumes. This may take a while...

 Found volume group "VolGroup05" using metadata type lvm2

 Found volume group "VolGroup04" using metadata type lvm2

 Found volume group "VolGroup03" using metadata type lvm2

 Found volume group "VolGroup02" using metadata type lvm2

 Found volume group "VolGroup01" using metadata type lvm2

 Found volume group "VolGroup00" using metadata type lvm2

[root@getlnx01uat ~]# 

查看卷组VolGroup05包含的PV、LV信息。如下所示

[root@getlnx01uat ~]# vgdisplay -v VolGroup05

 Using volume group(s) on command line

 Finding volume group "VolGroup05"

 --- Volume group ---

 VG Name VolGroup05

 System ID 

 Format lvm2

 Metadata Areas 1

 Metadata Sequence No 2

 VG access read/write

 VG Status resizable

 MAX LV 0

 Cur LV 1

 Open LV 1

 Max PV 0

 Cur PV 1

 Act PV 1

 VG Size 179.97 GB

 PE Size 32.00 MB

 Total PE 5759

 Alloc PE / Size 5759 / 179.97 GB

 Free PE / Size 0 / 0 

 VG UUID UNFxZH-lAGM-vqF3-jtNK-yuKT-enUX-WwL7FQ

 --- Logical volume ---

 LV Name /dev/VolGroup05/LogVol00

 VG Name VolGroup05

 LV UUID kCTJnc-D3zQ-QiJp-TfPh-ivWs-WKyW-VvGTod

 LV Write Access read/write

 LV Status available

 # open 1

 LV Size 179.97 GB

 Current LE 5759

 Segments 1

 Allocation inherit

 Read ahead sectors auto

 - currently set to 256

 Block device 253:2

 --- Physical volumes ---

 PV Name /dev/sdg5 

 PV UUID VbSwjS-9ckQ-ZfWf-bl8g-oPWQ-TMBi-H6oMWv

 PV Status allocatable

 Total PE / Free PE 5759 / 0

2：卸载卷组的逻辑卷LV

要卸载对应卷组VG的所有逻辑卷LV。从上面的信息可以看出对应的卷组VolGroup05只有/dev/VolGroup05/LogVol00这个逻辑卷LV

[root@getlnx01uat ~]# umount /dev/VolGroup05/LogVol00

使用下面命令亦可

[root@getlnx01uat ~]# umount /u05

如果还用进程在使用对应逻辑卷的文件，就必须强制卸载挂接点。

3：删除逻辑卷LV

[root@getlnx01uat ~]# lvremove /dev/VolGroup05/LogVol00

Do you really want to remove active logical volume LogVol00? [y/n]: y