If you are not running XP but an older system with 98 or ME the full version of Diskkeeper 8.0 worked great when running 98 on one of the older cases here. Instead of going all day on a 250gb drive Diskkeeper defragged everything in just under 90 minutes. Now having two 250gb drives in the current case the Buzzsaw freeware looks like one to try to maintain the driver while running in the background rather then forgetting to run anything.