In the last couple of years, RAID (Redundant Array of Independent Disks) technology has grown from a server option to a data protection requirement. The first implementations of RAID in 1990 were very expensive controller boards with high-performance I/O processors that were as powerful as the host CPU. At that time, when hardware-based RAID solutions were the only option, the cost of a RAID controller limited the usage to high-priced servers. Off late RAID is found everywhere - from an operating system software feature to a stand-alone controller providing advanced data integrity in high-end storage area networks.
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