LVM

Overview

• One or more Physical Volumes (eg. /dev/sda2) are joined together in a Volume Group (eg. /dev/vg1)
• A Volume Group is split into one or more Logical Volumes (eg. /dev/vg1/media)

Creating a new volume group & logical volume

To create a volume group (/dev/vg1) consisting of 1 physical volume (/dev/sda2), and split into only 1 logical volume (/dev/vg1/media):

• Setup partition as a physical volume:

sudo pvcreate /dev/sda2

• Create a volume group consisting of only this physical volume:

sudo vgcreate vg1 /dev/sda2

• Check volume group has been created successfully:

vgdisplay

This should show 1 volume group consisting of 0 LVs (see Cur LV and 1 PV (see Cur PV).

• Create a logical volume:

sudo lvcreate --size 30g --name media vg1

• Format the logical volume as ext3:

mkfs.ext3 /dev/vg1/media

• Mount the volume by adding the following line to /etc/fstab:

/dev/vg1/media   /var/media   ext3   defaults    0  2