[root@localhost ~]# fdisk -l 查看分区
[root@localhost ~]# mkfs.ext4 /dev/sdb 格式化分区
[root@localhost ~]# pvcreate /dev/sdb 格式后的sdb分区添加为物理卷
[root@localhost ~]# pvs 查看PV分区
[root@localhost ~]# vgdisplay 显示LVM卷组的信息
[root@localhost ~]# pvdisplay 显示物理卷的属性
[root@localhost ~]# vgextend VolGroup /dev/sdb 将分区sdb转换为扩展分区
[root@localhost ~]# lvdisplay 查看当前的逻辑卷,目的是查看/根分区的路径，即：/dev/VolGroup/LogVol00
[root@localhost ~]# lvextend -L +9.99G /dev/VolGroup/LogVol00 将新增的逻辑卷全部扩展到"/"分区中
[root@localhost ~]#resize2fs /dev/VolGroup/LogVol00 刷新根分区"/dev/VolGroup/lv_root"的容量
[root@localhost ~]# df -HT 查看刷新后根分区的大小
示例：
[root@localhost ~]# fdisk -l
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00028846
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 2611 20765696 8e Linux LVM
Disk /dev/sdc: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-LogVol00: 42.7 GB, 42718986240 bytes
255 heads, 63 sectors/track, 5193 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdd: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
[root@localhost ~]# mkfs.ext4 -y /dev/sdd
mkfs.ext4: invalid option -- 'y'
Usage: mkfs.ext4 [-c|-l filename] [-b block-size] [-f fragment-size]
[-i bytes-per-inode] [-I inode-size] [-J journal-options]
[-G meta group size] [-N number-of-inodes]
[-m reserved-blocks-percentage] [-o creator-os]
[-g blocks-per-group] [-L volume-label] [-M last-mounted-directory]
[-O feature[,...]] [-r fs-revision] [-E extended-option[,...]]
[-T fs-type] [-U UUID] [-jnqvFKSV] device [blocks-count]
[root@localhost ~]# vgextend VolGroup /dev/sdd
Physical volume "/dev/sdd" successfully created
Volume group "VolGroup" successfully extended
[root@localhost ~]# lvextend -L +9.99G /dev/VolGroup/LogVol00
Rounding size to boundary between physical extents: 9.99 GiB.
Size of logical volume VolGroup/LogVol00 changed from 39.79 GiB (10185 extents ) to 49.78 GiB (12743 extents).
Logical volume LogVol00 successfully resized.
[root@localhost ~]# resize2fs /dev/VolGroup/LogVol00
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/VolGroup/LogVol00 is mounted on /; on-line resizing required
old desc_blocks = 3, new_desc_blocks = 4
Performing an on-line resize of /dev/VolGroup/LogVol00 to 13048832 (4k) blocks.
The filesystem on /dev/VolGroup/LogVol00 is now 13048832 blocks long.
[root@localhost ~]# df -HT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-LogVol00
ext4 53G 791M 50G 2% /
tmpfs tmpfs 977M 0 977M 0% /dev/shm
/dev/sda1 ext4 199M 40M 150M 21% /boot
[root@localhost ~]#
概括：
1格式化分区.
mkfs.ext4 -y /dev/sdd
2.转换位扩展分区
vgextend VolGroup /dev/sdd
3.根分区扩展容量
lvextend -L +9.99G /dev/VolGroup/LogVol00
4.刷新根分区容量
resize2fs /dev/VolGroup/LogVol00
5.查看是否成功
df –HT
