How can I find out what is happening? (case #18901615)

Thanks Dave. It is good to know that someone else out there has seen this. It did happen the last time I downloaded the logs but the Duo synced ok and cames back on-line. From memory, the boot partition was only ~50% full when I last looked so I do not believe it is a O/S partition full problem although I will check when I get it back on-line.

Latest update from NetGear Support: no L3 reponse as yet, Duo still in telnet mode waiting for them. The L2 Engineer cames back overnight with the less than helpful suggestion of:

Thank you for your response. I do apologize for the inconvenience that this has caused you. Please upgrade your NAS firmware to the beta firmware 4.1.10[T3]. You may download the firmware on the link below: viewtopic.php?f=17&t=59222 Thanks again for choosing NETGEAR. Have a great day!

I am struggling to see how I can upgrade the firmware when the Duo cannot boot ...