What's the motherboard make and model, please?
> I took system and drive to a 'pro', and he could not get system to 'see' more than 1 TB.
He should have tried it on a different system, before giving up;
that would have isolated a problem with your BIOS, as
MrLinux wisely suggests above.
p.s. I usually hire Pros without the 'quotation' marks