RAID is a method of using multiple disks to store data. RAID 0 (striping) spreads blocks of data across multiple disks. It speeds up performance but has no redundancy capability. RAID 1 (mirroring) slows down write speed and can speed up reads, but it is mainly used for protection from drive failure. RAID 2, 3, 4, and 5 all make use of striping and use various forms of parity for fault tolerance. RAID 10 and RAID 0+1 combine mirroring and striping (although they implement them slightly differently—RAID 10 with a greater focus on reliability, and RAID 0+1 focusing more on speed).Symbolic links allow you to place MyISAM databases or tables in a different location from the usual data directory, usually a different drive.
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