It started to reset itself out of the blue then I got a "Severe Error" message.

It's supposed to try to repair itself for the next 3 hours and then if it's still not right, I'm supposed to call DTV.

The bastards are probably just trying to get me to upgrade to the new HD DVR for $300.

Might be related to the other failures this weekend:

http://www.avsforum.com/avs-vb/showthread.php?t=976538

Hard drive is probably failing or failed in it. Your choices are replace it or upgrade for $199 to a new HR20/21. Of course you probably get a better deal if your a customer in good standing with them.

For more info on your HR10-250, how to replace the drive, etc, check out tivocommunity.com

For info on the new DVR, tips for upgrading etc, check out dbstalk.com