Had a similar problem with my Seagate. I thought Seagate were meant to be a top brand............ but apparently not, according to all the web reviews. Died after 12 months with a faulty firmware.
Seagate came through, and repaired it for free, with free pickup and delivery.............. and all my data was intact too.

Bought a WD 1TB Caviar Black to compliment it with, since that was what most people recommended, and started running backups on it, just in case the Seagate ever died again.
Well, the good old WD lasted 1 month, and is down with the clickies. I have to pay freight and lose all may data to boot.
What's going on?!?!?!?!?