Originally Posted by spywarebanisher
small as in comparison wiith a modern hard drive.
It doesn't matter how big the hard drive is, fragmented is fragmented. Do you really understand what that means?
It means when you want to load program, the hard drive is going back and fourth all over the place, wasting time, rather than reading it all in the same area which is faster, and more efficient. Thats the point of a disk defragmenter.
Steam uses it's own file system for it's game files (those .gcf files you see in the 'SteamApps' directory) so it's not surprising that valve added a method to optimize them.