LINUX下为LVM磁盘增加硬盘空间

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LINUX下为LVM磁盘增加硬盘空间

1，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: 34.4 GB, 34359738368 bytes
255 heads, 63 sectors/track, 4177 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: 0x000b2d34

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64        4178    33041408   8e  Linux LVM

Disk /dev/sdb: 214.7 GB, 214748364800 bytes  //新加的盘硬盘
255 heads, 63 sectors/track, 26108 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-lv_root: 30.4 GB, 30396121088 bytes
255 heads, 63 sectors/track, 3695 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-lv_swap: 3435 MB, 3435134976 bytes
255 heads, 63 sectors/track, 417 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

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  //加180G
lvextend -l +100%FREE /dev/VolGroup-lv_root  //加全部

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 1.41.12 (17-May-2010)
Filesystem at /dev/VolGroup/lv_root is mounted on /; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 14
Performing an on-line resize of /dev/VolGroup/lv_root to 54606848 (4k) blocks.
The filesystem on /dev/VolGroup/lv_root is now 54606848 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  5.7G  189G   3% /
tmpfs                         1.9G     0  1.9G   0% /dev/shm
/dev/sda1                     485M   32M  428M   7% /boot

9， 其它细节