Nginx Windows High Traffic issues

[itpp2012]

Looking at the disk activity access to disk is using all your resources not
nginx.
Here http://s633.photobucket.com/user/C0nw0nk/media/Untitled-5.png.html you
see nginx itself is waiting for disk IO to complete, all processes are doing
just about nothing other then waiting for the harddisk, the main waiting
issue looks like it is writing to disk which isn't going fast enough.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,251186,251237#msg-251237