LinuxQuestions.org - Fedup F19 -> F20 fails with SCSI tape drives

I did this with no problems on one server which had no SCSI devices, and thus lulled into a false sense of security went ahead on the main one :-( It has 2 SCSI tape drives. The fedup command brought in all the necessary files and added the upgrade option to the grub menu. When it starts I see what begins to look like a successful update and then:

SCSI target 0:0:6 wide transfers fail
Failed to initialize Selinux context: No such file or directory
SCSI target 0:0:12 wide transfers fail
Target 0:0:12 Domain validation detected failure, dropping back

The last message is repeated 12 more times then nothing happens. After 10 mins I rebooted and the upgrade menu option is still there, but I have to choose the newest F19 entry to get the system up. This process is repeated each time, i.e. the update grub menu stays there.

What gives with these new SCSI device errors? They never gave a moments problem under F19. Am I reading this right and that is the issue, or is it just a warning and it's something else all together?

Thanks.