As I understand the question it refers to Lightroom rendering its images from the written disk this way testing it wheter or not to be readable. I don't use PM for archiving because I'm customed to verify the write and the disk state as well. After burning I use Nero's verify and I put an MD5 checksum file on all my disks this way I may check them any time later if they have any errors.
In a former thread some time ago Kirk mentioned to be possible to add such a feature to PMs burning but it might be forgotten, or at least not so important at the time being.