All right, my understanding of the hardware in the box must be incorrect then. You are correct in your assumption on how I'd like to setup the drives. I want a disk with the OS on it and then my data on the other drives in a RAID 5 configuration.
From what I've read in the IBM redbooks, I've come to the understanding that the OS disk (whatever drive you're booting from) cannot be in the same six-pack as your RAID configuration as you cannot boot off RAID with this box. Since I only have one six-pack drive bay in the box I would have to get a two-pack bay (in order to use the two pack location on the box) and put my OS disk there. Then run my other 4 drives in their RAID configuration in the six-pack.
I guess my next question would be, how do I configure the RAID group?
(I apologize if these are "dumb" questions, I'm still fairly new to AIX and IBM's hardware) Your help is greatly appreciated!