I have two identical st3160023as with the same firmware (3.18).
One of them stop work and is not detected by BIOS ( take to long to bios detect and if the HDD is pluged on board, the other hd is not detected too) after read some same problems here on forum, I decide to swich the PCB of the HDDs, but without success. With the original controller back to the defective HDD, I realize that the motor spin up, but the problem remain. I would apreciate any help.
Thanks

Most likely head problem.

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Thanks to responde so quickly.
The drive dont make any noise. I just know it spin up becouse i feel a little vibration when the computer is on (holding the drive very steady in my hand) what is a terminal log?

Something like this?
http://sites.google.com/site/seagatefix/

If the pcb is not damage and the motor is spining up, what the problem you think it is? what is a SA?
Thank you very much for your help!