一、磁盘分区

 fdisk /dev/vdb

Welcome to fdisk (util-linux 2 .32.1).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Command (m for help): n

Partition type

p primary (2 primary, 0 extended, 2 free)

e extended (container for logical partitions)

Select (default p):

Using default response p.

Partition number (3,4, default 3):

First sector (5357568-20971519, default 5357568):

Last sector, +sectors or +size{K,M,G,T,P} (5357568-20971519, default 20971519): +1G

Created a new partition 3 of type 'Linux' and of size 1 GiB.

Command (m for help): w

The partition table has been altered.

Syncing disks.

二、创建物理卷

 pvcreate /dev/vdb3

三、创建卷组

vgcreate -s 20M npgroup /dev/vdb3

四、创建逻辑卷

lvcreate -n np -l 45 npgroup

五、格式化

mkfs.ext3 /dev/npgroup/np

六、创建挂载点

mkdir /mnt/np

七、永久挂载

vim /etc/fstab

添加如下内容：

/dev/npgroup/np /mnt/np ext3 defaults 0 0