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How to replicate a file as it is still being written

What tool can I use to replicate a file from Windows XP desktop to Windows XP desktop or from Windows XP desktop to some kind of SAN while it is still being written.

This is a more specific follow up to a previous question
http://www.experts-exchange.com/Programming/Multimedia_Programming/Video_Editing/Q_24989775.html

Basically I want to capture video to a single file for 8 hours straight on an XP pc. While it is being captured I want the file to be relicated to a 2nd video editing PC. I want to see how simple I can keep this. The problem I foresee is that most file synchronization tools need to wait for the file handle to be released before they can proceed. I want something that can do iit in near real time.

I do not object to more complext solutions if that is the only way to go. More than anything I am hoping for something tried and true without too much setup.  
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stevenrblake
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stevenrblake
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Lieven EmbrechtsCommented:
this will be try and error.
try to copy the open file to a different location where you open it.
if you cannot copy it install the free shadowcopy and use this as a dos command.
http://www.runtime.org/shadow-copy.htm
if the video file is not finished/unusable while open, you will have to close it periodically.
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stevenrblakeAuthor Commented:
I can deal the file being unusable until closed. So long as it is being replicated in real time as it writes.

http://www.runtime.org/shadow-copy.htm does seem like a handy utility, I'll find user for it. But I am also looking for an automated solution that performs copy in the backround and only copies whatever portion of the file it doesn't have already. Similar to how I imagine WIndows server DFS to work.  
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Lieven EmbrechtsCommented:
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stevenrblakeAuthor Commented:
It sounds like I'll have to experiment in order to get a real world answer. I am guessing that my question is just "off the wall" enough for there to be no definitive "yes you can do this." I'll post back if I succeed.
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