Lofreq - I have the same problem. I have swapped cables. Swapped master/slave and I still get the no hard disk found every so often. I have 2 exact drives. They are both 48GB IBM Travelstor. I am not sure I will ever figure out why it happens. There is no rhyme or reason. It can happen even if I don't touch the unit. For example it works fine I go run into the store to get something, come back out and boom get the error. It makes no sense as I have not touched the unit.

Steve