[dnanian]

Well... an erase-then-copy is going to defragment all the files on the drive, but it won't defragment the "directory", or put it in what might be considered an "optimal" order for the tool (since that's kind of semi-arbitrary).

It may be that TTP is wrong, of course. It may be that it's referring to the above.

Personally, I've found Coriolis Systems' iDefrag and iPartition to be very reliable and effective (although I very rarely defragment)...