Storage

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. ...

RAID (Redundant Array of Independent Disks) is a technology that uses multiple physical disks as a single logical disk. Its main purpose is to improve data reliability and disk access speed. It has become an almost essential component in modern server systems. Basic Principles of RAID RAIDs are broadly classified into hardware RAID and software RAID. Hardware RAID is implemented using a dedicated controller. The operating system recognizes the RAID configuration as a single disk, and the RAID controller handles all operations. It offers high reliability and performance but comes at a higher cost. ...