RAID
(Redundant Array of Inexpensive/Independent Disks) is a method of saving data on storage media. It is used to speed up work with data, or ensure data security against hard drive failures. Security is ensured by a specific data saving on a number of independent disks thanks to which the stored data are maintained even after a failure of one of the disks. The security level differs depending on the type of RAID, which is designated by numbers (usually RAID 0, RAID 1, RAID 5, RAID 6). RAID is often used in servers, but it must be noted that the RAID does not replace data backup. Methods of data storage in RAID arrays continue to develop and evolve.
