Why is nothing ever simple? Replacement Sata disks sourced, purchased, plugged 1 in. Spins up, but not detected. Turns out my Motherboard has a SATA 1 controller chip that will not work under any circumstances with SATA 2 disks, even if you tell the disks to pretend to be SATA 1 disks. Don't suppose anyone has a linux compatable PCI SATA controller card with 2 Sata channels lying around that they don't need do they? (Note, that's PCI, not PCI-X, or PCI Express). What a waste of an evening! Harumph!!! Steve