linuxlvm删除分区,LinuxLVM中的PV物理卷（硬盘或分区）删
除⽅法
LVM的全称为Logical Volume Manager，它是Linux环境下对磁盘分区进⾏管理的⼀种机制，LVM是建⽴在硬盘和分区之上的⼀个逻辑层，来提⾼磁盘分区管理的灵活性。那么该如何对PV物理卷(硬盘或分区)进⾏删除呢?⼀起来看看具体操作⽅法。
⼀、由于硬盘或者分区的操作⽅式其实都⼀样，所以我这⾥就以分区为例。
⼆、/home分区2.6G，由如下pv组成：
/dev/sda5 100M
/dev/sda6 200M
/dev/sda7 300M
/dev/sda8 400M
/dev/sda9 500M
/dev/sda10 600M
/dev/sda11 500M
很碎对吧?^_^因为测试。
三、随机写了⼀堆⽂件进去，⽤量达到了2G，空闲500M
四、准备将sda6这个200M的PV卸掉(卸掉的容量必须⼩于空闲容量)
好了开始具体操作了。
卸载分区(缩⼩操作必须卸载才能进⾏)：
umount /homehmm
缩⼩分区：
e2fsck -f /dev/liuhg_disk/home
听说resize2fs /dev/liuhg_disk/home 2200M
⾸先将分区缩⼩到2200M这是为了给sda6腾出空间，sda6为200M，⽽我腾出了400M，因此应该是⾜够的。
缩⼩逻辑卷：
lvreduce -L 2200M /dev/liuhg_disk/home
分区缩⼩了⽤到的逻辑卷也要随着缩⼩，并查看PV使⽤的状态：pvdisplay -m
显⽰如下：
--- Physical volume ---
PV Name /dev/sda5
VG Name liuhg_disk
PV Size 103.26 MiB / not usable 3.26 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 25
Free PE 0
Allocated PE 25
PV UUID 5lnx52-b4jc-OOfZ-f2QA-ttdQ-DZeD-Ce3rb3
--- Physical Segments ---
Physical extent 0 to 24:
Logical volume /dev/liuhg_disk/home
Logical extents 0 to 24
--- Physical volume ---
PV Name /dev/sda6
VG Name liuhg_disk
PV Size 203.92 MiB / not usable 3.92 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 50
Free PE 0
Allocated PE 50
PV UUID S2ane6-nlFG-uSNR-35NP-Yxa6-cXRb-r8E8mK --- Physical Segments ---
calendar是什么意思Physical extent 0 to 49:
角色扮演英文Logical volume /dev/liuhg_disk/home
Logical extents 25 to 74
--- Physical volume ---
PV Name /dev/sda7
VG Name liuhg_disk
PV Size 305.89 MiB / not usable 1.89 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 76
Free PE 76
Allocated PE 0
PV UUID 9CFnlx-CAEw-CSul-Rig9-FiCN-zK0a-oGmTEP --- Physical Segments ---
Physical extent 0 to 75:
FREE
--- Physical volume ---
PV Name /dev/sda8
VG Name liuhg_disk
PV Size 407.87 MiB / not usable 3.87 MiB
Allocatable yes新思维培训学校
PE Size 4.00 MiB
Total PE 101
Free PE 60
Allocated PE 41
PV UUID X0I8p0-x2xr-2xLG-QQD4-jbtS-3C4i-xPn4Bl --- Physical Segments ---
Physical extent 0 to 40:
Logical volume /dev/liuhg_disk/home
上海环宇艺考培训学校
Logical extents 471 to 511
Physical extent 41 to 100:
FREE秘密花园2
--- Physical volume ---
PV Name /dev/sda9
VG Name liuhg_disk
PV Size 509.84 MiB / not usable 1.84 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 127
Free PE 0
Allocated PE 127
PV UUID avJQaA-oMKt-NEoJ-ojBK-2Csc-1dca-1mh6Ue --- Physical Segments ---
Physical extent 0 to 126:
Logical volume /dev/liuhg_disk/home
Logical extents 225 to 351
--- Physical volume ---
PV Name /dev/sda10
VG Name liuhg_disk
PV Size 603.98 MiB / not usable 3.98 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 150
Free PE 0
Allocated PE 150
PV UUID JlMIAF-A49n-M6HA-ZLXf-d8nS-pfZr-YeQsKT --- Physical Segments ---
Physical extent 0 to 149:
Logical volume /dev/liuhg_disk/home
Logical extents 75 to 224
--- Physical volume ---
PV Name /dev/sda11
VG Name liuhg_disk
PV Size 478.47 MiB / not usable 2.47 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 119
Free PE 0
Allocated PE 119
PV UUID xnHJNA-tDVx-dryX-KM1x-g96Y-sptI-9iUOcU --- Physical Segments ---
Physical extent 0 to 118:
Logical volume /dev/liuhg_disk/home
Logical extents 352 to 470
将sda6设置为离线状态：
pvchange -xn /dev/sda6
使⽤pvdisplay -m
显⽰如下：
……
--- Physical volume ---
PV Name /dev/sda6
VG Name liuhg_disk
PV Size 203.92 MiB / not usable 3.92 MiB
Allocatable NO
PE Size 4.00 MiB
Total PE 50
Free PE 0unconditionally
Allocated PE 50
PV UUID S2ane6-nlFG-uSNR-35NP-Yxa6-cXRb-r8E8mK ……
将sda6的数据移⾛：
pvmove -i 1 /dev/sda6
-
i 1是每1秒钟报告⼀次数据迁移的进度。
[root@liuhg /]# pvmove -i 1 /dev/sda6yaray
/dev/sda6: Moved: 38.0%
/dev/sda6: Moved: 84.0%
/dev/sda6: Moved: 100.0%
重新⽤pvdisplay -m
显⽰如下：
……
--- Physical volume ---
什么事英文
PV Name /dev/sda6
VG Name liuhg_disk
PV Size 203.92 MiB / not usable 3.92 MiB
Allocatable NO
PE Size 4.00 MiB
Total PE 50
