Agreed, in theory it should have absolutely made no effect; BUT, maybe that's why it's slipping by unnoticed as a cause ? Often the things you never would think of turn up being the root of the evil. And again, broken record, I can tailor recreate every time simply by changing the cable. Actually, I don't think it's the SATA Mode IDE vs AHCI but I do believe it's the SATA standards because they do change power settings per standard a little I believe. And yea this could all be only on certain boards because of chipset/sata bus controller on Mobo in combination with the other drives. I actually never would have thought of this as the cause cause it does make no sense. I stumbled on it by accident. gonna report my findings to Seagate tomorrow and see what they say and if they will test bench it on their end. Lol "Kill the chirp project 2012"