Hi All, first of all I appreciate Gradius2/jaclaz for this thread and continuing support. It does contain lot of info. Guys I have ST3500413AS 500GB Seagate Barracuda 7200.12 HDD. It spins without noise but BIOS cant detect it. I suspect BSY problem. Please confirm me whether I can apply 7200.11 solution to my 7200.12. I do have ttl to rs232 converter and knows all electronics required very well. Please advise Regards