Ben's notes

This is an old revision of the document!

~~TOC~~

KVM grow PV

Current partition table:

# 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

Remove /dev/sda2 partition and create a new bigger one:

# 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.

If disk is in use, reboot. Else try partprobe or kpartx.

Resize PV:

# pvresize /dev/sda2
  Physical volume "/dev/sda2" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized