I've got 4 hard drives in my Mac Pro that are each used for a variety of software RAID arrays for Mac OS. The problem is I can't get Boot Camp/Windows to work on a second partition on any of the drives. It would seem that any semblance of a RAID slice partition on a drive prevents Windows from booting. I can get into the Windows XP installer CD, format and copy the installation files to the NTFS partition, but when the system reboots to complete the Windows installation, I get the "missing or corrupt HAL.dll" error. Does anyone know a way to fix this? I just need to trick the Windows bootloader/boot.ini to boot. On the Mac OS side, I can see the NTFS partition just fine and all of the Windows XP setup files are present. Alternatively, I could try to install Windows/Boot Camp on a 5th drive plugged into the mobo's SATA port , but I don't know if that's possible either (see the other post).