Creating LVM Volume Group

How to create a LVM group from two hard disk partitions is introduced in this post.

Assume we have installed two hard disks /dev/sdb and /dev/sdc to the server, our task now is to create one LVM volume group vg_xen for installing LVM backed Xen DomUs from these two disks. We will do this by several steps: create partitions on the hard disks, initialize disk partitions and create a volume group.

Create partitions on the hard disks

We can use fdisk to create partitions:

# fdisk /dev/sdb

Add a new partition by command: n

Select primary partition by: p

Select partition number 1: 1

Then select from the first section to the last one.

Write table to disk and exit by command: w

We can find out the new partition in /dev/ directory:

$ ls /dev/sd*

We can find:


Follow the same procedure to create partition /dev/sdc1

Initialize disk partitions

Create volume group descriptors at the starts of partitions:

    # pvcreate /dev/sdb1
    # pvcreate /dev/sdc1

Create a volume group

We create LVM volume group vg_xen that contains /dev/sdb1 and /dev/sdc1:

# vgcreate vg_xen /dev/sdb1 /dev/sdc1

Activate the new added volume group

We can activeate it by scan the volume groups:

# vgscan

Add new physical volumes to the volume group

If we installed another hard disk /dev/sdd afterwards, we can create partition /dev/sdd1 on it and initialize it as introduced above. Then we can add the new physical volume to the volume group:

# vgextend vg_xen /dev/sdd1

A more detailed tutorial of extending a LVM volume group can be found here: Extending a LVM Volume Group.

Eric Z Ma

Eric is a father and systems guy. Eric is interested in building high-performance and scalable distributed systems and related technologies. The views or opinions expressed here are solely Eric's own and do not necessarily represent those of any third parties.


  1. Dear Zhiqiang Ma,

    I have small doubt, I have created Volume group(vg) and mount the vg(volume group) in /mnt and stored the some file.

    It is possible to move the Vg partition to another server, Please let me know ?

    Thanks for advance.



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