总结：
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fdisk -l
pvcreate /dev/sdb
vgextend VolGroup /dev/sdb
lvextend -L +180G /dev/mapper/VolGroup-lv_root
resize2fs /dev/VolGroup/lv_root
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1， 在VM WARE ESXI里为客户机增加一块新的硬盘
2， 重启客户机
3， 用FDISK –L查看整个磁盘空间
#fdisk -l
Disk /dev/sda: bytes heads, sectors/track, cylinders Units = cylinders of * = bytes Sector size (logical/physical): bytes / bytes I/O size (minimum/optimal): bytes / bytes Disk identifier: 0x000b2d34 Device Boot Start End Blocks Id System /dev/sda1 * Linux Partition does not end on cylinder boundary. /dev/sda2 8e Linux LVM Disk /dev/sdb: bytes heads, sectors/track, cylinders Units = cylinders of * = bytes Sector size (logical/physical): bytes / bytes I/O size (minimum/optimal): bytes / bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_root: bytes heads, sectors/track, cylinders Units = cylinders of * = bytes Sector size (logical/physical): bytes / bytes I/O size (minimum/optimal): bytes / bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: MB, bytes heads, sectors/track, cylinders Units = cylinders of * = bytes Sector size (logical/physical): bytes / bytes I/O size (minimum/optimal): bytes / bytes Disk identifier: 0x00000000
4， 用pvcreate /dev/sdb将新的硬盘加入物理卷
pvcreate /dev/sdb
Physical volume "/dev/sdb" successfully created
5， 用vgextend VolGroup /dev/sdb将新硬盘加入卷组
vgextend VolGroup /dev/sdb
Volume group "VolGroup" successfully extended
6， 为根分区扩散空间lvextend -L +200G /dev/mapper/VolGroup-lv_root
lvextend -L +180G /dev/mapper/VolGroup-lv_root
Extending logical volume lv_root to 208.31 GiB Logical volume lv_root successfully resized
7， 将之应用resize2fs /dev/VolGroup/lv_root
resize2fs /dev/VolGroup/lv_root
resize2fs (-May-) Filesystem at /dev/VolGroup/lv_root is mounted on /; on-line resizing required old desc_blocks = , new_desc_blocks = Performing an on-line resize of /dev/VolGroup/lv_root to (4k) blocks. The filesystem on /dev/VolGroup/lv_root is now blocks long.
8， 再用DF –H查看空间，已加入
df -h
Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 206G .7G 189G % / tmpfs .9G .9G % /dev/shm /dev/sda1 485M 32M 428M % /boot
9， 其它细节