x64 SATA HDD to HDD file copy slowdown

Discussion in 'Windows Vista Hardware' started by Skyham, Sep 3, 2008.

  1. Skyham

    Skyham Guest

    New install of Vista Ultimate x64. Drive C is a new drive which works
    well. Drive D is an older SATA 3.0 drive - both WD. When copying from
    drive D to drive C with large files the transfer starts out well enough
    at 55Mb/sec and slows down once around 2.5 GB are transferred. It slows
    down almost at once to a stop, and then continues at 100kb/sec. What in
    the world is causing the change? ICH9R is the chip on the motherboard
    (ASUS P5K Pro). I had the SATA set for IDE at first, then updated to
    ACHI using Microsoft's regedit update to enable ACHI after Vista was
    installed. This slowdown happens in both cases. Drive C to an external
    HD via firewire does not exibit this slowdown, but drive D to the same
    external HD does.

    Any ideas for me to look at and try?
     
    Skyham, Sep 3, 2008
    #1
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  2. Have you upgraded to SP1? There are changes introduced into SP1 that
    address situations like this.
     
    Timothy Davis [MSFT], Sep 4, 2008
    #2
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  3. Skyham

    Skyham Guest

    One of the first things I did was to install Vista64 and load SP1 prior
    to connecting this second drive. I think it may be a drive fault. I
    pulled this drive from another machine, and I had to jumper it to run at
    1.5 MB/s (SATA1) in order for it to work in the old box, and I had
    thought it was a motherboard issue there. If I try to re-jumper the
    drive to SATA2 3 MB/s Vista sees it, but not as an available drive. In
    the diskmngr it appears, but won't initialize it complaining of an
    unspecified error. If I jumper it to turn spread spectrum on it doesn't
    work, only as it was originally set at the slower rate. I have another
    drive on order which should be delivered tomorrow and my question will
    be answered one way or another.
    Thanks for your thoughts.
     
    Skyham, Sep 4, 2008
    #3
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