Part Magic shows it the same way 50Gb total drive capacity. I was wrong about the original size of the drive though it was 160Gb (once you take into account that its 160,000,000,000 bytes [I think thats the right amount of zero's] then you might as well say 150Gb).
I don't see how make and model would help Commando but if it really matters to you then I will find out (the hdd is currently ~12 miles away from me).