You should run the SMART test from Maxtor, and print out the output. With this output you can go (ship) to Maxtor RMA after contacting them or a reseller.

SMART indicates some errors (6 or 3 digit codes for Maxtor) you can look them up at the webiste www.maxtor.com , then you will be able to see what's wrong with your disk, if there's something wrong and SMART can detect it.