I used to work for Iomega Tech Support, I remember this happening if your MB has a seperate ATA 100 controller (Promise/ HighPoint or whatever) and if you connect it to this then this will cause this ...

In addition, the number goes from 0-3, so HDD3 is the secondary slave, not master.<P>It also shouldn't matter what cable you have installed because as i'm aware, the KT7A IDE headers support 33, 66, ...