add LVM and extend existed volume

LMVExtend

Personal memo for extend LVM voule
Disk /dev/vda: 317.1 GB, 317085921280 bytes
255 heads, 63 sectors/track, 38550 cylinders, total 619308440 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009c06d

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *          63     1028159      514048+  83  Linux
/dev/vda2         1028160   409593239   204282540   8e  Linux LVM


# sync
# shutdown

Resize a qemu image
# qemu-resize filename +100G

Boot VM
# fdisk /dev/vda

n
3
p
return
return
t
3
8e
w

# sync
# reboot

# pvcreate /dev/vda3
# vgextend system /dev/vda3
# lvextend -l +100%FREE
# resize2fs /dev/system/var

Disk /dev/vda: 317.1 GB, 317085921280 bytes
255 heads, 63 sectors/track, 38550 cylinders, total 619308440 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009c06d

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *          63     1028159      514048+  83  Linux
/dev/vda2         1028160   409593239   204282540   8e  Linux LVM
/dev/vda3       409593240   619308439   104857600   8e  Linux LVM


refs
http://se-suganuma.blogspot.jp/2009/04/centoslvmvmwarehdd.html
http://j-caw.co.jp/blog/?p=991