RAID 5 (Redundant Array of Independent Disks level 5) is a storage setup that distributes data across three or more drives while spreading parity information among them. Therefore, if one drive malfunctions, the remaining drives can reconstruct data using parity.

RAID 5 Applications

RAID 5 is widely used in environments that need to balance storage efficiency, performance, and fault tolerance. However, modern hard drives have become bigger, leading to longer rebuild times for RAID 5 arrays after a disk malfunction. This also introduces a vulnerability, as a second disk failure might cause data loss.

RAID 6 is better than RAID 5 as it can tolerate if two disks fail.