Logical Volume Manager

This article will explain how to use the Logical Volume Manager (LVM) in Linux.

Note: This article will cover how to use LVM under RedHat-style distros. Everything was tested using CentOS 6.5.

Examples

Creating a logical volume

• Prepare a physical volume:

fdisk -cu /dev/xvde
pvcreate /dev/xvde1
pvdisplay /dev/xvde1
pvs

• Create a volume group:

vgcreate vgname /dev/xvde1
vgdisplay vgname
vgs

• Create and use a new logical volume:

lvcreate -n lvname -L 1G vgname
lvdisplay /dev/vgname/lvname
lvs
ls -l /dev/vgname/lvname
#~OR~
ls -l /dev/mapper/vgname-lvname
mkfs.ext4 /dev/vgname/lvname
mkdir /data

• Make it persistent by adding the following line to your /etc/fstab file:

/dev/mapper/vgname-lvname  /data  ext4  defaults  1 2
mount -a