RAID Degradation

I have a RAID 1 on a new X-Serve G5. We recieved the system sometime in April, and already the RAID has degraded. I'm not sure what caused it, and because the company I work for didn't feel like dropping cash on the large support contract (only the small one), Apple won't help with the diskutil command line application, nor do they feel like explaing how to find out which drive is the active drive, beyond suggesting transferring a "Really Big File, and see which lights come on." The next steps involved yanking the good drive, booting from the server CD, reformatting the bad drive, plugging in the good drive again, and then rebuilding the RAID Array. I really guess this would work, but I'm more wondering what the people here have to say, as apple tech support has never provided any real help. Has anyone used the apple RAID? Any reason why the status would degrade? Would I be better trying to figure out diskutil on my own, or should I get Apple to help with the GUI version?