|Can't tell what is it. Bios to hard drive or any part in between could be the fault. |
Not even sure what the best way to go is. Maybe change the bios battery.
Also I even hate to suggest it but in some rare cases a bios re-flash may help but use that at the very last resort.
Use hard drive diags from the hard drive makers OEM site for best results.
A Pit Bull is like a gun you can pet. And there is no safety on it.