Seagate has issued an official statement today, acknowledging all recent problems with some Barracuda 7200.11 drives. Based on the information posted in the company's forums, select Seagate Barracuda 7200.11 1TB 3.5-inch hard drives made in Thailand, suffer from a firmware issue that bricks the HDDs after a short period of time. After three to five months of normal operation these defective hard drives will suddenly lock-up as a protective measure and prevent the system from recognizing the drive from then onwards. In most cases the information won't be lost, but the drive will be completely useless, changing the drive's electronics won't help much either. This problem occurs not only to the 1TB Barracuda models, but to Seagate 1.5TB, 640GB, 500GB, 320GB and 160GB Barracuda 7200.11 drives, along with some Maxtor and ES.2 models. That's pretty disturbing, but now Seagate will provide its customers with an updated firmware if their drive is problematic.
See link below for firmware update and list of affected models.