RAID (Redundant Array of Independent Disks) is a method of storing the same data in different locations on multiple hard disk drives (HDD) or solid-state drives (SSD) to protect data in the event of a drive failure.
This method increases the speed of storing and accessing data while preventing data loss and unplanned downtimes – as data is shared over multiple disks, this increases the mean time between failures (MTBF). Storing data redundantly also increases fault tolerance