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Number   :  4401
Date     :  2003-04-21
Author   :  profasaurus
Subject  :  Re: Slow transfer speeds of large files over network?
Size(KB) :  1


This fixed it! I just set it to /cl0 (no cache) and it seems to 
work fine. Why have write-cache at all then? 

Sorry for the previous post... I just read this follow up. Thanks!

--- In xxcopy@yahoogroups.com, "garrydeane"  wrote:
> --- 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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