So I have a cdot 9.1RC1 single node cluster that I want to upgrade to 9.1GA. I downloaded the image for 9.1GA using hardware type 6250 or something like that (does it matter?) and then put it on my http server and did a get, then update and it seemed to all work. I then set the new image to the boot image and rebooted. On boot it shows 9.1 for a couple seconds then it panics talking about a missing page of memory and it goes into a loop. I then booted off the boot_backup and went in set back to boot off the 9.1RC1 and it boots fine. Before doing that, I increased memory all the way up to 12 gigs and same exact error shows.