I just had a mini-power outage where all of my screens and printer went off. So did my Sun Ray. My heart is still beating fast from the shock.
I was right in the middle of an important editing session and was just then doing a save. All I could think of was did I get it in time or not?
It didn't matter - my Sun Ray server is on UPS. My Sun Ray had powered back up and I unlocked the screen in under 30 seconds. I could even see that I had just saved the file.
In case you can't tell, I love my Sun Ray setup. My office is quiet, my "machine room" is loud.