These two sites will help you determine if your drive is good or bad. This will help to avoid unnecessary freight charges involved with sending back drives:

http://www.seagate.com/support/npf/index.html
http://www.maxtor.com/en/support/downloads/index.htm

Advantages for running drive checklist:

• Helps prevent misdiagnosis of a system problem, preventing unnecessary disruptions to operation.
  
  
• Reduces unnecessary replacement of hard drives, helping reduce hard disk drive problem reoccurrence.