lvm缩容：
卸载：
复制代码 代码示例:
[root@station230 ~]# umount /dev/vg0/lv0
检查文件系统：
复制代码 代码示例:
[root@station230 ~]# e2fsck -f /dev/vg0/lv0
e2fsck 1.39 (29-May-2006)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/vg0/lv0: 11/26624 files (9.1% non-contiguous), 9031/102400 blocks
文件系统级别缩容：
复制代码 代码示例:
[root@station230 ~]# resize2fs /dev/vg0/lv0 80M
resize2fs 1.39 (29-May-2006)
Resizing the filesystem on /dev/vg0/lv0 to 81920 (1k) blocks.
The filesystem on /dev/vg0/lv0 is now 81920 blocks long.
lv缩容：
复制代码 代码示例:
[root@station230 ~]# lvreduce -L -20M /dev/vg0/lv0
WARNING: Reducing active logical volume to 80.00 MB
THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce lv0? [y/n]: y
Reducing logical volume lv0 to 80.00 MB
Logical volume lv0 successfully resized
[root@station230 ~]# vgreduce vg0 /dev/sda14
Removed "/dev/sda14" from volume group "vg0"
[root@station230 ~]# pvremove /dev/sda14
Labels on physical volume "/dev/sda14" successfully wiped
[root@station230 ~]# vgremove vg0
[root@station230 ~]# lvremove lv0
lvm快照：
复制代码 代码示例:
[root@station230 lv0]# lvcreate -s /dev/vg0/lv0 -n lv0bak -L 20M
Logical volume "lv0bak" created
[root@station230 lv0bak]# lvscan
ACTIVE Original '/dev/vg0/lv0' [80.00 MB] inherit
ACTIVE Snapshot '/dev/vg0/lv0bak' [20.00 MB] inherit
替换物理卷：
把新的pv添加到vg：
复制代码 代码示例:
[root@station230 lv0bak]# pvcreate /dev/sda14
Physical volume "/dev/sda14" successfully created
[root@station230 lv0bak]# vgextend vg0 /dev/sda14
Volume group "vg0" successfully extended
移动数据：
复制代码 代码示例:
[root@station230 ~]# pvmove /dev/sda11 /dev/sda14
/dev/sda11: Moved: 100.0%
移出旧pv：
复制代码 代码示例:
[root@station230 ~]# vgreduce vg0 /dev/sda11
Removed "/dev/sda11" from volume group "vg0"
[root@station230 ~]# cd /mnt/lv0
[root@station230 lv0]# ls
a b c d lost+found
迁移：
原来的主机：
复制代码 代码示例:
[root@station230 ~]# umount /dev/vg0/lv0
[root@station230 ~]# vgchange -a n vg0
0 logical volume(s) in volume group "vg0" now active
[root@station230 ~]# vgexport vg0
Volume group "vg0" successfully exported
替换的主机：
复制代码 代码示例:
[root@station230 ~]# vgimport vg0
Volume group "vg0" successfully imported
[root@station230 ~]# vgchange -a y vg0
1 logical volume(s) in volume group "vg0" now active
[root@station230 ~]# mount /dev/vg0/lv0 /mnt/lv0
