CentOS6.5 lv调整空间大小

把/dev/mapper/VolGroup-lv_home 减少500G加到root上去

[root@localhost ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup-lv_root 50G 762M 46G 2% /

tmpfs 2.1G 0 2.1G 0% /dev/shm

/dev/sda1 485M 32M 428M 7% /boot

/dev/mapper/VolGroup-lv_home 636G 198M 603G 1% /home

1、卸载vg_centos-lv_home分区

[root@localhost ~]# umount /home

[root@localhost ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup-lv_root 50G 762M 46G 2% /

tmpfs 2.1G 0 2.1G 0% /dev/shm

/dev/sda1 485M 32M 428M 7% /boot

2、从新设定vg_home-lv_home的大小

[root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 103G

resize2fs 1.41.12 (17-May-2010)

Please run ‘e2fsck -f /dev/mapper/VolGroup-lv_home’ first.

这一步设定vg_home-lv_home大小没有成功，系统提示我们先运行下面的命令，操作如下：

[root@localhost ~]# e2fsck -f /dev/mapper/VolGroup-lv_home

再来一次

[root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 103G

3、把home挂载上去

[root@localhost ~]# mount /home

[root@localhost ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup-lv_root 50G 762M 46G 2% /

tmpfs 2.1G 0 2.1G 0% /dev/shm

/dev/sda1 485M 32M 428M 7% /boot

/dev/mapper/VolGroup-lv_home 102G 188M 97G 1% /home

4、减小逻辑卷空间到指定大小

[root@localhost ~]# lvreduce -L 103G /dev/mapper/VolGroup-lv_home

WARNING: Reducing active and open logical volume to 103.00 GiB

THIS MAY DESTROY YOUR DATA (filesystem etc.)

Do you really want to reduce lv_home? [y/n]: y

Reducing logical volume lv_home to 103.00 GiB

Logical volume lv_home successfully resized

[root@localhost ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup-lv_root 50G 762M 46G 2% /

tmpfs 2.1G 0 2.1G 0% /dev/shm

/dev/sda1 485M 32M 428M 7% /boot

/dev/mapper/VolGroup-lv_home 102G 188M 97G 1% /home

查询卷组的信息：

[root@localhost ~]# vgdisplay

— Volume group —

VG Name VolGroup

System ID

Format lvm2

Metadata Areas 1

Metadata Sequence No 5

VG Access read/write

VG Status resizable

MAX LV 0

Cur LV 3

Open LV 3

Max PV 0

Cur PV 1

Act PV 1

VG Size 699.51 GiB

PE Size 4.00 MiB

Total PE 179074

Alloc PE / Size 40232 / 157.16 GiB

Free PE / Size 138842 / 542.35 GiB

VG UUID nH8xqm-Qz40-QIfm-jWLs-G3B8-9alC-AhSzZn

Free PE / Size指定的应该是现在可在分配的空间。

5、增加/root分区的大小

将可用的空间添加到/root分区上面：

[root@localhost ~]# lvextend -L +500G /dev/mapper/VolGroup-lv_root

Extending logical volume lv_root to 550.00 GiB

Logical volume lv_root successfully resized

从新设定该分区的大小：

[root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_root

再稍等片刻

在卸载/home目录的时候失败

可先执行如下fuser命令，然后再
87c7
umount即可

原播客地址：http://blog.csdn.net/wonder4/article/details/44858983