I had some old hard drives in a drawer, so I thought that they might as well be put in one of my Macs instead of sitting in storage. I have two 500GB IDE drives and one 80GB drive, and the forth is the stock HD that my G4 came with. The first 500GB HD works fine next to the stock one, in the main HD cage. In the 2nd HD cage, at the front of the computer, I find that adding the forth total HD makes the computer freeze a few seconds after start-up. I thought that one of my drives had its jumpers set incorrectly or something, but then I tested both individually in that secondary HD cage, and each worked fine as a third HD. Once I put them in together though, I got the freezing issue again. Does anyone know why this could be?