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  1. #1
    Join Date
    Aug 2008
    Toronto, Canada

    Unanswered: Sequential I/O with RAID-5 and RAID-10

    This is not really a DB2 question, but I hope someone could help clarify this for me. On p.18 of the following presentation ( ), it's mentioned:

    "N disk RAID 5 arrays can handle no more than N-1 sequential IO
    streams before the IO becomes randomized

    N disk RAID 10 arrays can do N sequential read IO streams and N/2
    sequential write IO streams before the IO becomes randomized"

    Is (N-1) for RAID-5 because of parity disk and (N/2) for RAID-10 because of disk mirroring?

  2. #2
    Join Date
    Jan 2003
    Provided Answers: 5
    I believe that that is a correct assumption.


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