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    RAID LEVEL 5: Independent Data Disks with Distributed Parity Blocks
    0 1 2 3 4 5 6 10 50 0+1
    RAID LEVEL 5: Independent Data Disks with Distributed Parity Blocks
    0 1 2 3 4 5 6 10 50 0+1

    Each entire data block is written on a data disk; parity for blocks in the same rank is generated on Writes, recorded in a distributed location and checked on Reads.

    RAID Level 5 requires a minimum of 3 drives to implement

    Featured Product

    Characteristics & Advantages

    • Highest Read data transaction rate
    • Medium Write data transaction rate
    • Low ratio of ECC (Parity) disks to data disks means high efficiency
    • Good aggregate transfer rate

    Disadvantages

    • Disk failure has a medium impact on throughput
    • Most complex controller design
    • Difficult to rebuild in the event of a disk failure (as compared to RAID level 1)
    • Individual block data transfer rate same as single disk

    Recommended Applications

    • File and Application servers
    • Database servers
    • Web, E-mail, and News servers
    • Intranet servers
    • Most versatile RAID level
     
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