Logical Volume Management in Linux

A Linux user’s guide to Logical Volume Management | Opensource.com

Main takeaway points:

• LVM allows for flexible disk space management — it has features like the ability to add disk space to a logical volume and its filesystem while the filesystem is mounted and active.
• It also allows for the collection of multiple physical hard drives and partitions into a single volume group which can then be divided into logical volumes.
• The volume manager allows reducing the disk space allocated to a logical volume, but there are a couple of requirements: the volume must be unmounted and the filesystem itself must be reduced in size before the volume on which it resides can be reduced.
• You can either create an entirely new volume group or you can add the new space to an existing volume group and either expand an existing logical volume or create a new one.