Ron, You will see a lot of posts to this site where those answering don't understand the problem and sometimes nit pick too much. Try not to let that bother you. I'm not sure I can help you with the hard drive problem but I can relate my experience. I have been running my dual 1.25 MDD with 10.3 and 4 hard drives installed for some time with no problems at all with the drives being mounted. I haven't checked for this post but I am sure that all four of the drives are set for cable select. I have 2 Maxtor 40 GB, 1 Samsung 160 GB and the original 120 GB drive that came with the computer. I would advise trying to set all drives to cable select and I think someone has already explained that the "normal" setup is right rather than the special setups that seem to be for PC's running other operating systems. I agree that the diagrams are often confusing depending on the drives. Hope this helps, S. Kennedy