Hi Keith,
As a test, you might consider getting a Fedora 14 live CD and see if it can find the drives. If so, it may be the same issue. It's possible that the release version of RHEL 6 supports it, if you can get hold of it to test it, or you may just want to put Fedora 14 on it if the difference doesn't bother you too much.
I just know CentOS really. Can I adapt easily? I assume things like yum and apache conf, etc are the same?
-Jason