Yes mine is original, can't see why a particular brand of hard drive would make any difference, unless its faulty. test it with "SMART Utility" and or surface scan using a Linux disk.
Thanks so much also are you using the hard drive that came with your dell or an after market if so what one
It seems my After Market Western Digital doesn't like OS X
I assume so. Why not ask on that thread?
Also Just to make sure Im supposed to download the editor from the first post right (Is that the updated one?)