My bet is that the disk is going bad.
Run the manufacturer's diagnostics on the drive and make sure there are no errors. (Maxtor is now part of Seagate, so use Seagate Seatools
Ran the Short Scan, said there was errors. Ran the Long Scan said there was errors, did repair. Ran Short Scan, NO errors.
Doing a full erase right now, but it seems promising! I will keep you guys updated.
Thanks to all!