i've the exact same hard drive which failed 1 year back, have tried everything to get it back but i guess it made worse so i'm keeping it ever since.. i'v purchased my second one ST3500418AS 7200.12 which have failed again days ago with same symptoms
after so much research about the whole issue.. it happened to me that both hard drives carrying the exact same faulty firmware issue from manufacture which lead to other complex fail to the hard drive - bad luck? - the company have announced an important update which can be apply for both of them but it's too late now.. although it happened to me that my drives still detected in bios sometimes - when its calm - but under heavy load it goes off again.. i manged to updated the firmware by seatool.. and my hard drive now is always detected, still ST31000528AS couldn't boot up due many bad sectors.. the other one ST3500 i could finally see him alive again but with one finally last breath! it was horribly slow.. so i quickly tried to backup what i can and seemed it's getting worse every time i copy something - some coped files was afterwards unreadable! - until it stopped completely by BSoD.. have tried again and boot up screen hang for so long time until BSoD and then the drive fail again to be undetected in bios! what a moody drive!
i think after sometime the drive will be detected - when its calm i guess! - but with more bad sectors as the first case.. which as an engineering student will drive me crazy!! i really want to know what exactly is the problem, i wish i have all the tool to satisfy my mind - anyone please? lol -..
i've tried the simple stuff like LBA 0 and bsy fix.. made my wires and connection, since the ST31000528AS is dead for me i tried out every single command.. some have worked like "N1" and the SMART is enable and working now but others seemed failed and gave me "Max Certify Rewrite Retries = not supported" - i haven't opened the PCB cuz the warranty is still valid for RMA -
i've shifted now to WD Finally after long time.. my trust with Seagate is over now.. although its seems their hard drive sound more healthy, spin well and light compare to heavy load noisy operation of WD like the old days
and maybe all the issue of Seagate based on weak software but again its their fault.. the balance in these technology should be more important since every part is related to another