RAID 5 requires at least three drives and distributes parity information across all drives to provide fault tolerance, while still improving read and write speeds.
RAID 5 improves read and write speeds by striping the data across multiple drives and provides fault tolerance by distributing parity information across all the drives in the array. Parity is a method used to recreate any data lost when a single drive fails. Understanding that RAID 5 requires a minimum of three drives is crucial, as with fewer than three drives, parity cannot be distributed effectively and the RAID 5 functionality cannot be achieved. Subsequently, if any one drive fails, the data can be reconstructed from the remaining drives using the parity information. RAID 0 stripes data without parity contributing to speed but offers no fault tolerance, RAID 1 creates a mirror of data, providing fault tolerance with no significant speed improvement, and RAID 10 combines features of RAID 0 and RAID 1 and requires a minimum of four drives.
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