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RAID Levels

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RAID 5

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Advantages: Data protection with parity, good read performance. Disadvantages: Write performance penalty, complex rebuild after disk failure.

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RAID 50 (5+0)

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Advantages: Combines the advantages of RAID 5 and RAID 0. Disadvantages: Complex, expensive due to many drives needed, longer rebuild times.

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RAID 4

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Advantages: Block-level striping with dedicated parity disk. Disadvantages: Single parity disk can be a bottleneck, not ideal for write-intensive applications.

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RAID 6

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Advantages: Enhanced data protection with two parity blocks, can survive two disk failures. Disadvantages: Higher write penalty, more complex than RAID 5.

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RAID 2

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Advantages: Bit-level striping with dedicated Hamming code parity. Disadvantages: Obsolete, complex, and high overhead.

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RAID 60 (6+0)

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Advantages: High data protection and performance. Disadvantages: Very high cost, requires a large number of disks, and complex management.

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RAID 0

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Advantages: Improved performance, increased throughput. Disadvantages: No redundancy, data loss on one disk means total data loss.

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RAID 1

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Advantages: Redundancy, fault tolerance. Disadvantages: Higher cost due to disk requirements, reduced storage efficiency.

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RAID 3

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Advantages: Byte-level striping with dedicated parity. Disadvantages: Inefficient for random access use, parity disk could be a bottleneck.

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RAID 10 (1+0)

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Advantages: Performance and redundancy combined, fast recovery. Disadvantages: High cost due to many disks needed, reduced storage efficiency.

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