LVM

Here are some useful commands to manage LVM.

Configuration

• OS : Debian Jessie 8.1

Commands

Display informations

• Display attributes of physical volumes

root@host:~# pvdisplay

• Display volume group information

root@host:~# vgdisplay

• Display information about a logical volume

root@host:~# lvdisplay

Create

• Create phisical volume

root@host:~# pvcreate /dev/sda1

• Create volume group named vg01

root@host:~# vgcreate vg01 /dev/sda1

• Create 15Go size logical volume named lv01

root@host:~# lvcreate -L 15G -n lv01 vg01

Extend a ext2/ext3/ext4 volume (here with /tmp)

• First unmount partition

root@host:~# umount /tmp

• Here we want to add 10Go more (we can use -r argument which allow to automatically resize file system) :

root@host:~# lvextend -L+10G /dev/mapper/tmp

• We manually resize our file system

root@host:~# resize2fs /dev/mapper/tmp

• We mount back our partition

root@host:~# mount /tmp

Activate logicals volumes

• Active all logicals volumes from a volume group

root@host:~# vgchange -ay VGNAME

• Active a logical volume

root@host:~# lvchange -ay LVNAME