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Definition
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Disk striping
-Disk striping requires at least two drives.
-If any one drive fails, all data is lost. |
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Definition
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Disk mirroring/duplexing
-RAID 1 arrays require at least two hard drives, although they also work with any even number of drives.
RAID 1 is the ultimate in safety. |
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Term
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Definition
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Disk striping with distributed parity
-RAID 5 distributes data and parity information evenly across all drives.
-RAID 5 requires at least three drives.
-RAID 5 arrays effectively use one drive's worth of space for parity. |
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Term
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Definition
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Disk striping with extra parity
-RAID 6 is RAID 5 with extra parity information.
-RAID 6 needs at least four drives, but in exchange you can lose up to two drives at the same time. |
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Term
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Definition
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Nested, striped mirrors
-Requiring a minimum of four drives, a pair of drives is configured as a mirror, and then the same is done to another pair to achieve a pair of RAID 1 arrays. |
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Term
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Definition
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Nested, mirrored stripes
-It takes a minimum of four drives to implement RAID 0+1. Start with two RAID 0 striped arrays, then mirror the two arrays to each other. |
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