LVM

In Linux systems, storage management is one of the most critical tasks for system administrators. The Logical Volume Manager (LVM) provides flexible storage management by abstracting physical disks into logical units. LVM’s Basic Structure LVM consists of three key layers: Physical Volume An actual disk or partition that has been initialized to be used by LVM. This can be a physical storage device like /dev/sda1, /dev/sdb. Volume Group A collection of physical volumes that are combined into a single storage pool. At this stage, the boundaries of the physical disks are removed, presenting one large storage space. ...