What is parity on raid?

Parity on RAID (Redundant Array of Independent Disks) refers to a method of error checking and data recovery that involves storing a parity bit or set of bits alongside data across multiple disks. This parity information allows for the reconstruction of lost data in the event of a disk failure. In RAID configurations like RAID 5 and RAID 6, the parity is distributed among the disks, enhancing data redundancy and improving fault tolerance without the need for mirroring all data. This allows RAID systems to maintain data integrity while optimizing storage efficiency.