Hello all !
Seagate st3500620as drive is not visible in bios, but what is strange - connected via usb-sata interface gives (correctly) visible hdd model (but nothing more). I've tried in other computers, with other cables, if you would ask
After connection to terminal it only reports:


As far as I know there wasn't any drive manipulations nor failed firmware upgrade tries.
Because I've never seen such an error message before, I would ask if my assumptions about hdd conditions are right.As I understand diagerror 3 means rom checksum error, which equals damaged firmware. Is that sa part error or is that problem with rom part of it ? I must admit that I'm little dizzied about that msg. :/
What can be done to restore data from it ? Is there any hope ?

Thanks in advance