I recently noticed our ReadyNAS unit was not backing up to our offsite ReadyNAS. We are getting an unknown error 255. Both units were working fine for months. I tried updating both units to the most recent firmware 6.9.4, we had 6.9.0 prior to that. In the history is shows that it connected and with average durations from 2-8 hours some as high as 10 or 20 hours which was normal before when it did complete the backup. I have attached a copy of the ReadyDR logs.
We do use a DDNS service on the offsite unit. I have verified this is still working correctly.
Model: RN422|ReadyNAS 422 2-Bay with up to 20 TB total storage
I don't use ReadyDR, so hopefully someone who does will chime in.
It looks like the job is running for some hours before it loses the connection somehow. Perhaps PM @Marc_V or @JohnCM_S and ask them if they are willing to analyze your full log zip. (Don't post that zip publically, as there is some information leakage if you do).
