Your P5Q motherboard offers only six SATA ports on board. If one has 15 SATA hard drives to connect to a P5Q motherboard, what kind of SATA controller board would you recommend one use to give one an additional nine SATA ports?

I’m asking this because I hit a dead end building my home fileserver using an old Asus PC-DL Deluxe motherboard I had laying around. I installed two Promise PCI SATA controller cards to give me an additinal eight SATA connection ports. What I discovered is that my motherboard BIOS does not allow more than five hard drives to be connected to the motherboard, therefore I can’t use PCI SATA controller cards to add additional SATA ports. I would appreciate it if you can share a component list for your new server project. Thanks.