RAID (redundant array of inexpensive disks or redundant array of independent disks) [1][2] is a data storage virtualization technology that combines multiple physical data storage components into one or more logical units for the purposes of data redundancy, performance improvement, or both.
RAID is a data storage arrangement that combines multiple physical drives into one logical unit. The setup aims to improve storage performance, provide fault tolerance, or both. RAID uses different techniques to distribute data across drives.