创建基于分区的LV

1、     通过fdisk创建分区，详细步骤省略，可参考如下:

http://blog.csdn.net/wuweilong/article/details/7538647

http://space.itpub.net/?uid-20674423-action-viewspace-itemid-722812

[root@jetsen /]# fdisk /dev/sdc  （n\ p\ 1\ +500m\ w\）--创建了500M分区

[root@jetsen /]# fdisk /dev/sdc  （n\ p\ 1\ +1024m\ w\）--创建了1G分区

查看分区信息

[root@jetsen /]# fdisk -l /dev/sdc                ----分区已经创建成功

Disk /dev/sdc: 536.8 GB, 536870912000 bytes

255 heads, 63 sectors/track, 65270 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot     Start        End     Blocks  Id System

/dev/sdc1              1         62     497983+ 83 Linux

/dev/sdc2             63        187    1004062+ 83 Linux

[root@jetsen /]#

2、    创建基于分区的物理卷

[root@jetsen /]# pvcreate /dev/sdc1

Physical volume "/dev/sdc1" successfully created

[root@jetsen /]# pvcreate /dev/sdc2

Physical volume "/dev/sdc2" successfully created

3、    创建卷组：

[root@jetsen /]# vgcreate soft /dev/sdc1 /dev/sdc2

/dev/cdrom: open failed: Read-only file system

/dev/cdrom: open failed: Read-only file system

Attempt to close device '/dev/cdrom' which is not open.

Volume group "soft" successfully created

[root@jetsen /]#

4、    激活卷组

[root@jetsen /]# vgchange -a y soft

0 logical volume(s) in volume group "soft" now active

[root@jetsen /]#

5、         从卷组中删除物理卷

[root@jetsen /]# vgreduce soft /dev/sdc2

Removed "/dev/sdc2" from volume group "soft"

[root@jetsen /]#

6、    添加卷组到物理卷

[root@jetsen /]# vgextend soft /dev/sdc2

/dev/cdrom: open failed: Read-only file system

Attempt to close device '/dev/cdrom' which is not open.

Volume group "soft" successfully extended

[root@jetsen /]#

7、    创建LV

先查看VG的大小，为1.5G，包含2个PV

[root@jetsen /]# vgdisplay soft

--- Volume group ---

VG Name              soft

System ID

Format               lvm2

Metadata Areas       2

Metadata Sequence No 3

VG Access            read/write

VG Status            resizable

MAX LV               0

Cur LV               0

Open LV              0

Max PV               0

Cur PV               2

Act PV               2

VG Size              1.43 GB

PE Size              4.00 MB

Total PE             366

Alloc PE / Size      0 / 0

Free PE / Size      366 / 1.43 GB

VG UUID              D3x6JY-BVIL-C4ld-013H-U2Rq-hb1q-1oOVnx

[root@jetsen /]#

将1.5G共366个PE创建一个LV

[root@jetsen /]# lvcreate -l366 soft -n soft01

Logical volume "soft01" created

[root@jetsen /]#

8、    创建文件系统：

[root@jetsen /]# mkfs.ext4 /dev/soft/soft01

mke4fs 1.41.5 (23-Apr-2009)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

93696 inodes, 374784 blocks

18739 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=385875968

12 block groups

32768 blocks per group, 32768 fragments per group

7808 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912

Writing inode tables: done

Creating journal (8192 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 29 mounts or

180 days, whichever comes first. Use tune4fs -c or -i to override.

[root@jetsen /]#

9、    挂载文件系统

[root@jetsen /]# mkdir /soft

[root@jetsen /]# mount /dev/soft/soft01 /soft

[root@jetsen /]# df -h

Filesystem                          Size  Used  Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00     18G 5.8G  11G  35%  /

/dev/sda1                            99M 12M  82M 13%   /boot

tmpfs                               506M 4.0K 506M  1%  /dev/shm

/dev/mapper/soft-soft01              1.5G  35M  1.4G  3%  /soft