copying from WinXP to Win7 slow while copying from Win7 to WinXP very fast

Discussion in 'Windows Vista General Discussion' started by someone@somewhere.com, Apr 11, 2011.

  1. Guest

    I tied to copy a large file from WinXP PC to Win7 PC (read from WinXP
    share on Win7 PC), it's very slow, running at 10% of 100Mbps network
    (as shown in task manager), while copying from Win7 PC to WinXP (the
    same two PC) is very fast (write to WinXP share on Win7), at 90% of
    100Mbps network. Why is that?

    I haven't tried do the copying on the WinXP yet, the WinXP has issues
    accessing the share on Win7 (which other Win7 PC can access). Need to
    figure out this also, but not that important.

    Thanks.
     
    , Apr 11, 2011
    #1
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  2. Paul Guest

    Re: copying from WinXP to Win7 slow while copying from Win7 to WinXPvery fast

    wrote:
    > I tied to copy a large file from WinXP PC to Win7 PC (read from WinXP
    > share on Win7 PC), it's very slow, running at 10% of 100Mbps network
    > (as shown in task manager), while copying from Win7 PC to WinXP (the
    > same two PC) is very fast (write to WinXP share on Win7), at 90% of
    > 100Mbps network. Why is that?
    >
    > I haven't tried do the copying on the WinXP yet, the WinXP has issues
    > accessing the share on Win7 (which other Win7 PC can access). Need to
    > figure out this also, but not that important.
    >
    > Thanks.


    This guy could probably answer your question.

    http://blogs.technet.com/b/markrussinovich/archive/2008/02/04/2826167.aspx

    That is an example of the basic copy mechanism, but it doesn't cover the
    effects of network tweaks (encrypted VPN as network), or the effects that
    an AV product might have on the process (scanning the file as it is being
    transferred, doubling the number of read operations). So other users
    of those OSes, might not be seeing the same thing as you.

    Paul
     
    Paul, Apr 11, 2011
    #2
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