Linux LVM-删除卷组逻辑卷物理卷

查看卷组相关信息

[root@localhost /]# vgscanReading all physical volumes.  This may take a while...Found volume group "VolGroup00" using metadata type lvm2

查看卷组VolGroup00包含的PV、LV信息。

[root@localhost /]# vgdisplay -v VolGroup00Using volume group(s) on command lineFinding volume group "VolGroup00"--- Volume group ---VG Name               VolGroup00System ID             Format                lvm2Metadata Areas        1Metadata Sequence No  2VG Access             read/writeVG Status             resizableMAX LV                0Cur LV                1Open LV               0Max PV                0Cur PV                1Act PV                1VG Size               1.01 GiBPE Size               8.00 MiBTotal PE              129Alloc PE / Size       100 / 800.00 MiBFree  PE / Size       29 / 232.00 MiBVG UUID               Cug510-pQb6-RELO-lb1K-zjbt-3f62-jQLoQp--- Logical volume ---LV Path                /dev/VolGroup00/iscsi00LV Name                iscsi00VG Name                VolGroup00LV UUID                tE78D6-5kJf-0HOh-4jRX-oLhI-ehyR-XhMmMQLV Write Access        read/writeLV Creation host, time localhost.iscsi, 2017-01-19 14:25:40 +0800LV Status              available# open                 0LV Size                800.00 MiBCurrent LE             100Segments               1Allocation             inheritRead ahead sectors     auto- currently set to     256Block device           253:0--- Physical volumes ---PV Name               /dev/sda7     PV UUID               OWz0uw-gTR1-WylF-z6HW-cgpe-LLd9-2W8Q9gPV Status             allocatableTo编辑/etc/fstab，删除对应挂载信息tal PE / Free PE    129 / 29

卸载卷组上的逻辑卷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VolGroup00只有/dev/VolGroup00/iscsi00这个逻辑卷LV

[root@localhost /]# umount /dev/VolGroup00/iscsi00

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（#df -Th 查看）。

删除逻辑卷LV

[root@localhost /]# lvremove /dev/VolGroup00/iscsi00
Do you really want to remove active logical volume iscsi00? [y/n]: yLogical volume "iscsi00" successfully removed
[root@localhost /]#

如果删除提示出错，那么检查下当前使用该逻辑卷的进程，然后结束该进程或者服务即可。

验证LV是否删除

[root@localhost /]# lvdisplay | grep "dev/VolGroup00/iscsi00"

删除卷组VG

[root@localhost /]# vgremove VolGroup00Volume group "VolGroup00" successfully removed
[root@localhost /]#

如果采用安全的方式删除卷组VG，则必须使用 vgchange -a n VolGroup00 将其关闭，然后再删除它。

[root@localhost /]# vgchange -a n VolGroup000 logical volume(s) in volume group "VolGroup00" now active
[root@localhost /]# vgremove VolGroup00Volume group "VolGroup00" successfully removed
[root@localhost /]#

验证卷组（VG）是否删除

[root@localhost /]# vgscan Reading all physical volumes.  This may take a while...No volume groups found
[root@localhost /]#

删除物理卷PV

[root@localhost /]# pvremove /dev/sda7Labels on physical volume "/dev/sda7" successfully wiped
[root@localhost /]# pvscanNo matching physical volumes found
[root@localhost /]#