Synology & Plex, add media from second Synology NAS

Good day,

I have a Synology (let’s call it Syn1) with Plex.
I also have a second Synology (let’s call it Syn2) with folders containing movies.
Now i want to add a library in Plex that points to the folders on Syn2.

I managed to mount the folders from Syn2 (as NFS) on the Syn1.
Then i added the libraries in Plex to point to the mounted folders.
But when trying to scan for library files in Plex it won’t find the media files.

I know the problem is that Plex doesn’t have permission on those folders on Syn2.
But i am unable to fix this issue.

What i tried so far:

  • Set NFS permissions on Syn2 on the shared folders. Hostname is IP of that of Syn1. Squash is Map all users to admin. (admin on Syn2 has read/write rights on the media folders).
  • Create a plex user account on Syn1.

Basically the System internal user called PlexMediaServer should have access to the mounted folders from Syn2. But System internal users doesn’t count as a normal user account, so ignored by the NFS permissions and squash setting.

Does anyone know the solution?

Thanks for the manual. But i already tried this and all permissions are set properly. Still when trying to scan for files in the Plex library it doesn’t scan and no files are being found.

On Syn1 i mounted the shared folders using CIFS. Then in Plex i add a library, point the folder to the shared folder, scan library files but nothing happens.

Any ideas?

Don’t use CIFS on Linux-Linux connections. (CIFS = Windows)
(CIFS works for a single user-id. It doesn’t support your username + Plex concurrently)

  1. Use NFS mount
  2. On second NAS, grant READ permission to EVERYONE (no restrictions)

Ok, i disconnected the CIFS mounts and now mounted with NFS.

But where exactly do you add permissions to EVERYONE on the shared folder on the second NAS?
There is no EVERYONE user or group. Not in permissions or NFS permissions.

Edit: ah wait, i managed to find it, right-click on map, permissions, then create and select EVERYONE, tick read and write. Save. But still Plex is not able to find the files in the folder when scanning

Apply to sub-folders and files!

Yep, did that as well but no result.

Also tried creating a NFS-rule and squash rights to admin, or anyother option, but still doesn’t do anything and not finding the files

I do NFS this way:

  1. No mapping / squashing
  2. Now “everyone” comes in.

Otherwise, when you squash to ‘admin’, you need to go back and force ‘admin’ on all your media (makes things too complicated)

Allowing the cross-mount is important because you have a NAS behind a NAS.

Important question: When you are on the first machine, Can it see ONLY the mount point or can it see down into the remote directory ?

I now set the NFS permission exactly as you have.
In File Station, right-click folder, properties, permissions, added EVERYONE with read&write.

Answer on the important question, on the first synology (the one running Plex) i have a folder named Remote Folders, within the folder named 4K movies, if i open that folder i can see the movie folders.
This is what you mean?

I still can’t figure this out. Any more advice from somebody?

  1. is the folder mounting?

This is what it will look like right before you make the mount

  1. What are the permissions on the remote shared folder / export ?

  2. What are the LOCAL shared folder permissions ?

Thanks for helping out again.

  1. Yes

  2. Permissions on Syn1 on the folder called ‘Remote Folders’ and Applied to This folder, sub-folders and files.
    Exactly the same permissions on Syn2 for the local folder.

  3. NFS rule permissions

“Everyone” is allowed on BOTH sides of the NFS mount?
(Both machines)

Yes, the screenshot i provided at my previous post at nr2 is exactly the same on Syn1 and Syn2

Maybe something to mention, but maybe it will not effect the permissions at all, but when trying to set permissions on Syn1 on the folder \Remote Folders\Disney it will give this message:

I can only set permissions on \Remote Folders

Synology uses ACLs to control permissions.

I think you maybe need tell me about that older syno :wink:

  1. It doesn’t support Windows ACLs ?
  2. Which version of DSM is running on it ?
  3. Was the remote shared folder created at any point BEFORE DSM 6 ?

I suppose it’s supporting ACL as it is on DSM 7.
But the question is do i need ACL for Plex and mounting to get it working?

Syn1: DS218+ running DSM 7.1.1-42962 Update 6.
Syn1: DS220+ running DSM 7.2.1-69057 Update 3.

I created the shared folders on Syn2 less then 2 months ago, so definitely on DSM6 or higher.

Remote folder on Syn1 are created less then 2 months ago. And in the meantime also been removed and re-added severals times to try to get it working with Plex.

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.