What settings you have in the BIOS for tha SATA controller ? Which mode it is AHCI or IDE this is also important, If you don't see it, change the mode to IDE.
I asked this so many times but i never got an answer.
I've wokred with people that really want help but do nothing to actually get a proper help.
If you are talking about a 3.5M$ you have to provide a proper information so we can somehow remotly find a solution.
I have no crystal ball to tell from a probably few thousends kilometers what's wrong with frankenstein's type of a harddisk, repaired by god knows who. This is not the way.
There should be a simple system. You collect and provide all the possible data(info) so you can apply the most efficent solution, otherwise you are just gambling with 70 bitcoins... and the odds are against you.
Sorry OP but I really get upset when people do not understand the situation they put the others that are trying to help. You need at least answer the question we put here, if you cannot answer, please ask so we can explain in details what you need to do in order to answer them. That's all.