Thanks - I was wondering. And again, being totally new to Raid, here's another for you: Can you take an OS that doesn't itself support raid, and make it work with a hardware raid solution? For example, I want to use Win2kpro which doesn't support mirroring, and use raid 0+1 so I don't have to worry about hard drive crashes, but don't want to spend the money on the Server ver of Win2k. As I migrate systems to Win2kpro from Win98, I find the most annoying thing about NT-type systems is the inability to make an unattended mirror copy onto a redundant drive in the middle of the night. My backup solution for my 9x systems was always to purchase a second hard drive, "mirror" (i use the term loosely) my main drive to it using xcopy32, then each successive night after that use a utility called inSync to keep the mirror current. This was always convenient because if the main drive crashed I simply made the mirror the new master, then fired up fdisk and made it active, and voila, I was back without the hassle of restoring from tape or any of the other hassles associated with real honest to god backup software. If the mirror dies, I just get a new one and redo the mirror, nuff said. Anyway, I digress. Is it possible to use hardware raid on an OS that has no software raid support? Thanks again, and please to excuse extreme newbieness!