Thanks, everyone. Making the single drive a RAID-0 was the answer. From
the boot, it was <ctrl-R>, and then follow what y'all were saying. As soon
as I did that, and had the controller software make it bootable, when I
got out and went into the CenOS install, everything was wonderful - I even
saw what had been on there (before I blew it all away).
Thanks again.
mark