All the old machines I have ever worked on in the past had the HD's hooked to a single controller even if their were 2 of them. They would be hooked as master and slave drives. Now I have a much newer machine with on-board primary and secondary controllers. When I put the sys together I hooked the drives (I have 2- WD 1.2 gig) to one cable as master and slave drives. Then Win 95 was installed and all works fine.