I have two Unraid servers running, something I set up some time ago. One acts as my media server (Server00) and is where Sonarr and SABnzbd are set up. The other (Server01) is used for more general file storage and where more processor intensive dockers / activity take place. Both of those servers are old PC's that I have repurposed with limited storage capacity and processors. At some point I will upgrade everything but it's not a priority right now and managing the use of the two servers together has been interesting to go through.
Regarding Sonarr 2 and 3 they are both set up with the docker media path pointing to the same path on the same server '/mnt/user/Media/TV/' and the download queue set up as RW/Slave to a path to Server01 as '/mnt/disks/192.168.1.3_Downloads/'. I checked everything again today, all of the media management settings are the same.
I then stopped both Sonarr dockers just to be sure of what then happens. I started Sonarr 3 and tried downloading a file, the download triggered, finished and then error stating that there were no matching files (or something like that). I deleted the download file, stopped Sonarr 3 and started Sonarr 2. Tried the same file and it worked as expected - the file downloaded and moved to the required folder.
I have tried deleting Sonarr 3 and setting it up again. I have tried just about every obvious setting I can see, comparing the two Sonarr versions. But no joy.
If you can think of anything it will be appreciated.