SAS 6iR Question

I have a PowerEdge T105 that I just put a SAS 6iR RAID card into, and I have several questions about the configuration of the HDD.....First, is it possible to use the 80GB SATA drive as the OS drive using the onboard SATA slots, and RAID two SATA drives for data?  Second, does anyone know the part number of the cables used for the 6iR?????  I'd like to add a hot spare, or even put a couple of SAS drives in this box.....Is it possible to mix SAS and SATA drives on this card?????