I dunno why the CD-R would be rejected byt the system. If it's blank and never used before it should just work.
From what I understand you are trying to make a copy of your drive for disaster recovery. While I have no real help to offer with the specific errors you are getting, I gotta say I happilly use Acronis True Image to create perfect copies of hard disks. I did a few dozen systems so far and never a single glitch.
"In order to understand recursion, one must first understand recursion."