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    Trouble understanding HD Tune result

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by swiego, Jun 26, 2008.

  1. swiego

    swiego Notebook Consultant

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    I am running HD Tune 2.55 on a new XPS M1530 with the 320GB Samsung M6 5400rpm drive.

    HD Tach basically shows ~55MB/sec up to the mid-point of the disk (160GB mark) perfectly flat, and only after that is the expected STR decay I was expecting. This is very much unlike,

    http://www.hjreggel.net/hdtechdat/hdtechdat-tests-25s.html

    Which for the same drive shows a result much more in line with what I would have expected.

    Why would STR be pegged on this drive at 55MB/sec and only degrade PAST the halfway point? Is there an interface or other bottleneck here I'm not aware of?

    I'm running this on 64-bit Vista Ultimate if that helps. Fresh install, clean HD, no junk.
     
    swiego, Jun 26, 2008
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  2. swiego

    swiego Notebook Consultant

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    swiego, Jun 26, 2008
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  3. swiego

    swiego Notebook Consultant

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    Bah, and I figure out the answer myself. Noticed a block size setting, set it to max (8MB) and now I get my decay curve that I'd expect.

    I guess I must be limited by # of I/Os issuable.
     

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    swiego, Jun 26, 2008
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