I have had good luck with the ARCO-IDE Dupli Disk PCI Raid Controller. It works really well if you want to mirror two drives, and works even better if the drives are identical. Their website is www.arcoide.com. I did have some problems getting their newer device to work on a Compaq, however. The device takes up a PCI slot for power only, and I have noticed no performance decrease. Rick Phillips Churchill Capital (612) 673-6738 phillips at churchillnet.com