OK. Getting this now... I think.
I looked under the Integrated PERC bios config utility and see there is a problem. Probably from my pulling out that drive.
It shows Drive 00:00 as online and Drive 00:01 as foreign. I assume I have messed up the raid.
Printing out the manual now so I can try to sort all this out.
After I fix this do I start as I would with my client OS install... that is... will I do Fdisk and then Format using the boot CD?