6、 確認當前需要擴展的VG：

[[email protected] ~]#vgdisplay或者vgs

--- Volume group ---

VG Name datavg

*

*

VG Size 100.00 GiB

*

*

8、使用/dev/sdc1創建PV：

[[email protected] ~]# pvcreate /dev/sdc1

Writingphysical volume data to disk "/dev/sdc1"

Physicalvolume "/dev/sdc1" successfully created

9、使用新建的PV擴展VG（這裏是datavg）：

[[email protected] ~]# vgextend datavg /dev/sdc1

Volume group "datavg" successfully extended

10、確定擴展後VG中可用的PE，以擴展LV：

[[email protected] ~]# vgdisplay datavg

Free PE / Size 12799 / 50.00 GiB

11、使用free PE空間擴展LV：

[[email protected] ~]#lvdisplay #查看要擴展的LV

--- Logical volume ---

LVPath /dev/datavg/datalv

***

[[email protected]~]# lvextend -l +12799 /dev/datavg/datalv

Extendinglogical volume datalv to 149.99 GiB

Logical volumedatalv successfully resized

12、在線擴展文件系統：

[[email protected] ~]# resize2fs /dev/datavg/datalv

resize2fs1.41.12 (17-May-2010)

Filesystem at/dev/datavg/datalv is mounted on /data; on-line resizing required

old desc_blocks= 7, new_desc_blocks = 10

Performing anon-line resize of /dev/datavg/datalv to 39319552 (4k) blocks.

The filesystemon /dev/datavg/datalv is now 39319552 blocks long.

13、查看空間是否擴充生效：

[[email protected]~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup-lv_root

35G 5.1G 28G16% /

tmpfs 1.9G 76K1.9G 1% /dev/shm

/dev/sda1 485M 37M423M 8% /boot

/dev/mapper/datavg-datalv

148G 94G 47G67%/data

LVM 磁盤分區擴容