Logical Volume Management (LVM)

https://www.howtoforge.com/linux_lvm

Creating LVMs

• Partition disks as Linux LVM with fdisk
• Prepare new partitions for LVM Example:

pvcreate /dev/sdb1 /dev/sdc1 /dev/sde1  # pvremove /dev/sdb1 /dev/sdc1 /dev/sde1 to revert
pvdisplay                               # to show Physycal volumenes

• Create a volume group example 'pilaf':

 vgcreate pilaf /dev/sdg1 /dev/sdf1  # vgremove pilaf to delete

• Check existing Volume Groups

vgdisplay
vgscan

• Create logical volumes in volume group

lvcreate --name pilaf_copy --size 4T pilaf
lvcreate --name pilaf_converter --size 4T pilaf

• Check existing logical volumes with:

lvdisplay / lvscan

• Rename logical volumes with

lvrename {volume_group} {old_name} {new_name}  | example: lvrename pilaf pilaf_copy pilaf_raw

• Enlarge Logical volume with:

lvextend -L4.5T /dev/pilaf/pilaf_raw