大大都文章先容的都仅仅是添加硬盘以及调解分区巨细，但很少有安详的彻底卸掉个中一个分区或硬盘的，这里重点先容一下这个。

环境先容：

一、由于硬盘可能分区的操纵方法其实都一样，所以我这里就以分区为例。

二、/home分区2.6G，新加坡电信服务器

马来西亚服务器，由如下pv构成：

/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，用量到达了2G，空闲500M

四、筹备将sda6这个200M的PV卸掉(卸掉的容量必需小于空闲容量)

好了开始详细操纵了。

卸载分区(缩小操纵必需卸载才气举办)：

umount /home

缩小分区：

e2fsck -f /dev/liuhg_disk/home

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跟着缩小，并查察PV利用的状态：

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 ---

Physical extent 0 to 49:

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

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

Logical extents     471 to

511

Physical extent 41 to 100:

FREE

--- 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配置为离线状态：

pvchange -xn /dev/sda6

利用pvdisplay -m

显示如下：

……

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