From: Mike N. 

On Fri, 14 Apr 2006 21:14:25 +0300, "Antti Kurenniemi"
 wrote:

>4. Push the piece into the destination stream, while continuing to read from
>the source stream.

   I think we're saying the same thing - this is simultaneous operation,
whether from multiple threads or overlapping I/O.   Described this way, it
seems quite likely that CopyFile() uses simultaneous I/O in the copy operation.

   FYI - we did the upgrade  this morning at 4:00 AM.  RoboCopy worked
perfectly.   It appeared that the read operation kept the source drive 95%
occupied, and the target drive 50% occupied, judging by the lights.  It
would have been interesting to put some NT performance counters on that,
but there were many things happening at once.....

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