http://nwcom.info/Soft/Test/HDD/HD%20Tach%202.7/hdtach.exe
http://nwcom.info/Soft/Test/HDD/HD%20Tach%202.7/readme%20(701).txt
http://nwcom.info/Soft/Test/HDD/HD%20Tach%202.7/readme.rtf