kemical,
Yea, I wish I could do that
Reality is the chip is embedded on the motherboard. The only way to update the SI 3114 would be a BIOS update. There aren't any and Asus stopped any development on this board years ago.
However, I was able to set each drive as a single JBOD and override the default size to get to a 2TB drive size. Then I used Storage Space to create a RAID 5 array. I am happy I got this to work and I have just started on the task of copying 350+ DVDs to the server.
I have to say this is probably the best help board I have ever encountered. Quick responses. Good ideas and suggestions. I have bookmarked this site and I will try to return here to give a little back.