I updated my SME7pre4 to SMErc1 today with not issues.
Ran Mondo
Used panel to backup to PC
Burned Mondo ISO to CD.
Used Darik's Boot & Nuke to wipe my drive.
Inserted New Mondo Disk, it ran and ended
Reboot
Nothing.......
It's getting late so I'll research and test more tomorrow.
By the way this is only a test box.
Rick