ReOrg does not support large drives. Fact is it was writen years ago when a 80gig or even a 40 gig drive was not even a dream. As far as I know there are NO defrag tools for FFS. There are some for the newer replacment File systems. So you have only 3 things you can do. Do not defrag, Set new partitions under 4gig max, or change to one of the new file systems with defrager with no limit. :-?