FIGURE 1
Fig 1—The various RAID levels use striping for speed enhancement and mirroring or parity codes for redundancy. Level 1 (b), using mirroring, provides redundancy but no speed advantage; level 0 (a) uses pure striping and offers no redundancy; levels 3, 4 (c), and 5 (d) use striping for speed and parity codes for fault tolerance.

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