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CentOS下删除LVM卷组中的物理卷 |
浏览次数:1819 关键词 ( 组中 物理 CentOS LVM ) |
本篇介绍LVM管理中的命令vgreduce, pvremove。其实前面几篇中以及有所涉及。 vgreduce:通过删除LVM卷组中的物理卷来减少卷组容量。注意:不能删除LVM卷组中剩余的最后一个物理卷 pvremove: 用于删除一个存在的物理卷。使用pvremove指令删除物理卷时,它将LVM分区上的物理卷信息删除,使其不再被视为一个物理卷。 在删除物理卷PV之前,必须将服务器的分区信息、卷组信息、物理卷信息、逻辑卷信息都掌握清楚,避免出现失误或误操作。 [root@localhost ~]# fdisk -l Disk /dev/sda: 128.8 GB, 128849018880 bytes 255 heads, 63 sectors/track, 15665 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 10443 83778975 8e Linux LVM /dev/sda3 10444 15665 41945715 83 Linux [root@localhost ~]# vgscan Reading all physical volumes. This may take a while... Found volume group "VolGroup00" using metadata type lvm2 [root@localhost ~]# pvscan PV /dev/sda2 VG VolGroup00 lvm2 [79.88 GB / 0 free] PV /dev/sda3 VG VolGroup00 lvm2 [40.00 GB / 40.00 GB free] Total: 2 [119.88 GB] / in use: 2 [119.88 GB] / in no VG: 0 [0 ] [root@localhost ~]# pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name VolGroup00 PV Size 79.90 GB / not usable 23.41 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 2556 Free PE 0 Allocated PE 2556 PV UUID YGtB2J-ZKJr-mV62-NluQ-2DGy-vuUT-cCc1lo --- Physical volume --- PV Name /dev/sda3 VG Name VolGroup00 PV Size 40.00 GB / not usable 2.61 MB Allocatable yes PE Size (KByte) 32768 Total PE 1280 Free PE 1280 Allocated PE 0 PV UUID wsnv13-7j1H-SH8q-hl6k-HpNc-x4WU-gM7LzW [root@localhost ~]# lvscan ACTIVE '/dev/VolGroup00/LogVol00' [77.91 GB] inherit ACTIVE '/dev/VolGroup00/LogVol01' [1.97 GB] inherit [root@localhost ~]# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert LogVol00 VolGroup00 -wi-ao 77.91G LogVol01 VolGroup00 -wi-ao 1.97G vgreduce参数:
[root@localhost ~]# vgreduce VolGroup00 /dev/sda3 Removed "/dev/sda3" from volume group "VolGroup00" [root@localhost ~]#
[root@localhost ~]# pvscan PV /dev/sda2 VG VolGroup00 lvm2 [79.88 GB / 0 free] PV /dev/sda3 lvm2 [40.00 GB] Total: 2 [119.88 GB] / in use: 1 [79.88 GB] / in no VG: 1 [40.00 GB] [root@localhost ~]# pvs PV VG Fmt Attr PSize PFree /dev/sda2 VolGroup00 lvm2 a- 79.88G 0 /dev/sda3 lvm2 a- 40.00G 40.00G [root@localhost ~]# pvremove /dev/sda3 Labels on physical volume "/dev/sda3" successfully wiped [root@localhost ~]# pvscan PV /dev/sda2 VG VolGroup00 lvm2 [79.88 GB / 0 free] Total: 1 [79.88 GB] / in use: 1 [79.88 GB] / in no VG: 0 [0 ] |
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