32 hours later, my first Roamio Pro lock up. I hope this is a one time thing...
No Tuning Adapter connected
Things the Roamio was doing at the time of the lock up:
Recording 5 HD channels, and transfering 1 hd program from a Premier XL4 to the new Roamio.
The lockup froze the screen for 13 seconds, then automatically rebooted itself and continued the recordings. The Room to Room transfer needed to be restarted manually.