Another thought - try only connecting one disk at a time. See if it works with only one disk, and if it works with a specific disk. This will pinpoint a bad hard drive (assuming one is bad) or a problem running two disks at the same time (if it works with either one connected, but not both). Granted, it means mussing around with jumpers a bit, but it should be worth it.

Paul G.
SN# 090000587 (40GB Green)