I really don't know if everything is set up correctly or not but plex scanning is super annoying. On the library settings, I only ticked the "Run a partial scan when changes are detected" setting and left both the "Scan my library automatically" and " Scan my library periodically" off. my mount setting is:
"mount/ --allow-other --dir-cache-time 1000h --umask 002 --user-agent animosityapp --vfs-read-chunk-size 32M". A also used mergerfs with these settings "/local:/GD /gmedia -o rw,use_ino,allow_other,func.getattr=newest,category.action=all,category.create=ff,cache.files=auto-full"
plex, radarr and sonarr all points to the local folder and I run the upload script manually. and yeah I'm using a shared google drive space
I did follow your setup
/local thats used to put new downloads in and copy them later using the upload script, u called it (local mirror disk)
/mount is the rclone mount
/gdrive is the union
they'll are located in /home
I know its named differently in the post I just didn't edit them there
I was mistaken turned out they'll pointed to the union drive -sonarr,radarr,plex- except one library -the one that made me write this post- which is being scanned now again I'll see how long it'll take