I lost a DVR this week when I got the HD GUI. I have 3 DVR's 2 HR20's (100 and 700) and an HR21-100. The 2 HR20's have updated fine. However the HR21 has major problems. I can only assume at some point when the UI came down the box rebooted. I now am getting an error 14-560 and when I run the diagnostics it says there are errors on the hard drive. ux071 was the HD error on the external diagnostics. Well I noticed that it was trying to boot from the internal HD and not the external HD. I tried to run diagnotics on the external drive but it is not recognizing that there is an external HD at all. I have rebooted it at least 25 times and cannot get it to recognize the External HD, and by all appearances the internal drive is toast. I have verified the external HD is normal and functioning. Any ideas on how to get it to recognize the external HD? Or is the HR21 toast and I should resign myself to having to get a new box and lose the recordings on my external hard drive?