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Number   :  4364
Date     :  2003-04-19
Author   :  Garry Deane
Subject  :  Re: Slow transfer speeds of large files over network?
Size(KB) :  0


--- In xxcopy@yahoogroups.com, "profasaurus"  wrote:
> Hello,
> 
> We are experiencing a strange problem with slow network
> transfer speeds only when copying very large files (4 GB +).
> When xxcopying other size files (~160 MB), transfer speeds
> are 1.5 MB/sec. When xxcopying the very large files to the
> same network drive map, the transfer speeds are only
> 150 KB/sec. However, when using windows explorer to
> copy and paste the same large files, the transfer speeds 
> are 1.5 MB/sec, so the issue seems to be linked to xxcopy.
> Any ideas?

You might try using the /CLnnn switch. Xxcopy apparently tries to use 
a 1Gb write cache by default which may cause disk thrashing if you 
don't have this much virtual memory allocated. I'm not sure whether 
this would affect writing to a mapped drive though.

Garry



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