Phillip: thanks for your earlier suggestions. Some results: I was unwilling to install and use the 2.4.21pre5 kernel referenced in the link you provided since I was concerned about breaking my VMware. That has been a story in itself but does work now. I have lost the earlier emails (from yesterday) in setting this up, so cannot thread them now. As suggested, I ignored building the HPT module to control the 372 chip, and used the ataraid and hptraid modules included in 8.2. They work ok but, after a deep breath and setting up the hpt bios, I found, much to my chagrin, that they do not support mirroring. Bummer. Setup I wanted to achieve, with four disks, was stripe for Win since I have some large video files to work with there (proprietary program, win only), and mirror with 8.2 since that is where files I really care about and depend on are. OTOH I can access the drive(s) on the HPT controller as individual drives, so I suppose I can just make regular disk b/u's to the second disk, since that would be the essential result of a mirror anyway. Richard