Originally Posted by lurkswithin

First....the SATA drive can be a slave to the boot drive it is just not called a slave. Windows should be able to see the drive in "My Computer" > explore but will be noted as a mass storage device or removable storage device

In order to use the SCSI add-on card controller to boot from...your computer BIOS must support this. Check your BIOS boot order and see if it is listed as a first boot acceptable device . If the first boot device does not show as an ASCI or SATA then you will not be able to boot from the drive.