Disk Mirroring on W2K Pro

I need to figure out a Fault tolerant solution for my workstations. They each have two hard drives and ideally if one drive fails the second could be booted. They must both be online to facilate data backup…sounds like Disk mirroring?..except you can’t do that on Pro. Is there a low cost third party solution? I have tried “ghosting” the second drive..ran the configuration and then after shutting down..removed the master drive to simulate failure and created a boot disk to point to the second drive. Either it loops around the login or if I can get it to boot properly it now thinks it is drive “D”..important to remain “C” using Dell optiplex workstations.