Help with disaster recovery needed

Certainly!

plex was installed via openmediavault plugin if I remember well. At the time I did create a symlink from /var/lib/plexmediaserver/ to /mnt/raid5/plexmediaserver/ so rsync has resolted the whole directory. About the full backup process you can check this thread which was very informative for me:

In the meantime I did a fresh install of plex on the primary server (nothing that could be lost any ways). I don’t mind re-adding the server as new but the main point is how to re-set the Library with all the folders I had without having Plex thinking they are new.

Thanks!!