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  • Ultra DMA

    Sometimes WINNXP decides that my IDE cd reader is not ULtra DMA 2 and sets it to PIO .
    I found only this method to make XP detect again my cd reader as Ultra DMA mode 2 :

    Desactivate the IDE device connected to the cd reader (the main one in my configuration) .

    When XP detects that the IDE device has been removed it reinstalls it and all devices connected (HD, cd reader) .

    Note that, as my main IDE device is also connected to the HD used by XP (contains all WINDOWS files);
    I don't like this method .

    So please, have you a better way to make XP set my cd reader as Ultra DMA 2 (please don't explain me that I just have to modify in configuration pannel the IDE transfert mode, it doesn't help because XP doesn't take into account my suggestion) .

    Thanks

    Olivier

  • #2
    This is a known issue that happens after repeated DMA transfer errors occur (>6); this article explains it:

    http://www.microsoft.com/whdc/hwdev/...e/IDE-DMA.mspx

    It may be due to several reasons, including hardware problems.

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    • #3
      OK

      Thanks for the reply .

      I will remember that the next time I will encounter the problem but I think that I already did the microsoft suggestion without success :

      - Remove the IDE cd device
      Or
      - Turn transfer mode to PIO and then again to Ultra DMA is possible .

      Anyway thanks again

      Olivier

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