[root@localhost ~]# fdisk -l /dev/xvda #查看磁盘分区情况
Disk /dev/xvda: 536.9 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 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: 0x000c6d68
Device Boot Start End Blocks Id System
/dev/xvda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/xvda2 64 2611 20458496 8e Linux LVM
[root@localhost ~]# fdisk /dev/xvda #创建磁盘新分区
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4) p
Partition number (1-4): 3
First cylinder (2611-65270, default 2611):
Using default value 2611
Last cylinder, +cylinders or +size{K,M,G} (2611-65270, default 65270): +300G
Command (m for help): p
Disk /dev/xvda: 536.9 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 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: 0x000c6d68
Device Boot Start End Blocks Id System
/dev/xvda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/xvda2 64 2611 20458496 8e Linux LVM
/dev/xvda3 2611 41774 314578135 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@localhost ~]# partx -a /dev/xvda #重新从kernel中读取分区表信息
BLKPG: Device or resource busy
error adding partition 1
BLKPG: Device or resource busy
error adding partition 2
[root@localhost ~]# pvcreate /dev/xvda3 #创建物理卷
Physical volume "/dev/xvda3" successfully created
[root@localhost ~]# vgextend VolGroup /dev/xvda3 #将新创建的物理卷加入逻辑卷组
Volume group "VolGroup" successfully extended
[root@localhost ~]# lvextend -L 310G /dev/VolGroup/lv_root #扩展逻辑卷大小 +100%FREE全部可用空间
Extending logical volume lv_root to 310.00 GiB
Logical volume lv_root successfully resized
[root@localhost ~]# lvs
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
lv_root VolGroup -wi-ao--- 310.00g
lv_swap VolGroup -wi-ao--- 1.97g
[root@localhost ~]# resize2fs /dev/VolGroup/lv_root #格式化
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 = 20
Performing an on-line resize of /dev/VolGroup/lv_root to 81264640 (4k) blocks.
The filesystem on /dev/VolGroup/lv_root is now 81264640 blocks long.