As with most Operating Systems that you want to dual-boot with NT 4.0, you should install NT last. You didn't describe the problems you are having, but my guess would be that W2K is already installed, and NT 4.0 can't read the NTFS partition. If so, it's because W2K uses a newer version of NTFS than NT 4.0. NT also cannot read FAT32. Help me understand why you would want a server to dual-boot. Servers are intended to run all the time. The ServeRAID 4Mx supports both Windows 2000 and NT 4.0, so it is not likely the reason for the failure.