logical volume manager in linux.

 LVM is mechanism to manage storage systems in a scalable manner.

It allocates disk devices into pools of storage space called Volume Groups, these volume groups are turn subdivided into Logical Volumes.

Follow 3 steps process to create LVMs.

• Set of hard drives combined into one/more Physical volumes.

• Those Physical volumes combined into Volume Groups.

• Then creating Logical Volumes from Volume Groups Space.

Benefits of Logical Volume Management

• We can easily resize of existing partitions.

• Create a logical volume and file-system which spans multiple disks.

• Implement LVM with RAID, it provides fault tolerance with scalability and easy disk management.

* Boot loader can’t read Logical Volumes, so we can’t create /boot partition with LVMs