Right now I am looking at an Intel BIOS panel listing the raid devices and drives that make up the RAID. All of the drives are OK. The RAID status says "Rebuild". And a message on the bottom of the screen says, "Volumes with "Rebuild" status will be rebuilt within the operating system."
In spite of the RAID device being listed as Bootable, when I exit this Intel panel, I am prompted for a boot device. I guess that the RAID is not being detected as bootable. Who knows? You can't get that information if Intel does not bother to provide it somewhere!
Do you think that it would be too much to ask for Intel to post some online documentation that can help their customers walk through this convoluted process?