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3ware HTML Bookshelf
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RAID 1 and RAID 10 units each use mirroring to achieve fault tolerance. Identical data is stored on two or more drives to protect against drive failure.
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RAID 5, RAID 6, and RAID 50 units achieve fault tolerance by using a simple (exclusive OR) function to generate the parity data that is distributed on all drives.
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RAID 6 adds an extra level of protection over RAID 5 by generating a second parity when data is written. This allows two drives to fail without compromising data integrity, especially on larger units.
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