Not 100% sure but recent versions of Seatools may support Maxtor drives since they own them now. Go to
www.seagate.com and download it, I use the CD-ISO version, boots to FreeDOS then runs Seatools. Select SHORT test to see if that succeeds (it may fail), then run a LONG test to see if it can recover/remap the sectors.
Data recovery will cost a shitload, you'll need to determine whether your data is worth that much.