{{tag>[kvm grow pv]}}

=====KVM grow PV=====
  * Current partition table:<code># fdisk -l /dev/sda

Disk /dev/sda: 2000.3 GB, 2000341917696 bytes, 3906917808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 524288 bytes
Disk label type: dos
Disk identifier: 0x000b9cd2

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048   592416767   295695360   8e  Linux LVM</code>
  * Remove /dev/sda2 partition and create a new bigger one:<code># fdisk /dev/sda
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): d
Partition number (1,2, default 2): 2
Partition 2 is deleted

Command (m for help): n
Partition type:
   p   primary (1 primary, 0 extended, 3 free)
   e   extended
Select (default p): p
Partition number (2-4, default 2): 2
First sector (1026048-3906917807, default 1026048): 
Using default value 1026048
Last sector, +sectors or +size{K,M,G} (1026048-3906917807, default 3906917807): +512G
Partition 2 of type Linux and of size 512 GiB is set

Command (m for help): p

Disk /dev/sda: 2000.3 GB, 2000341917696 bytes, 3906917808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 524288 bytes
Disk label type: dos
Disk identifier: 0x000b9cd2

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048  1074767871   536870912   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.</code>
  * If disk is in use, reboot. Else try partprobe or kpartx.
  * Resize PV:<code># pvresize /dev/sda2
  Physical volume "/dev/sda2" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized</code>
  * Verify new size:<code>[root@srv2 ~]# pvs
  PV         VG     Fmt  Attr PSize   PFree  
  /dev/sda2  centos lvm2 a--  512.00g 230.00g</code>