Defrag reorders drive over and over
I am curious about defrag, and if this is unusual. I do a defrag on a Windows 98 PC's and show details to watch it reorder the drive, this it takes while. Then I run defrag again and it reorders it differently, moves files to different areas. I am guessing that windows keeps track of the most commonly used files so that it can optimize, but is this being changed by the defrag process? Might something else be the cause? Is this normal with 98?
I am used to Windows 95, where the second scan is much quicker because the drive is defragged and ordered already. This is happening on mutiple Win98SE PC's. Anyone run into this?
Thanks