Auto scan for new media files in library folder not working

Plex Media Server
1

Server Version#: 1.42.1.10060 ( the only working with HW transcode for me )
Player Version#: (Android) 10.30.6.4151
I`m having issue with media sync.

From Plex Server point of view I have switched ON Library → Settings → 1st checkbox to auto scan library.

There is also auto scan each 12hours set.

Previously ( when I was on Synology ) new files in folders were discovered instantly and library was always up to date. Now on Qnap new files are not discovered. I need to manually scan library from player to refresh it. What can do done/checked to have it auto-scan by server side ?

2

I recommend running a repair on the Plex database to see if that resolves the issue. I highly recommend using DBRepair—I’ve used it to fix similar problems with great success.

3

Have you checked Inotify table size ( Synology FAQ - Questions, Answers, and How-To's - #22 by ChuckPa ) I am not thinking database corruption yet, as it does scan, just not automatically

4

Do you have simillar steps for Qnap?

5

@marcin_487

Yes, there is a QNAP equivalent.

I am writing it now and preparing it for the QNAP FAQ

6

@marcin_487

Quick Question:

Are we referring how to increase the Notify table size on QNAP
-or-
How to run DBRepair on QNAP?

7

I`m not aware where is the problem.
I can just see that refresh auto and scheduled is not working. System is quite fresh (few days). Library rather small.

8

Let’s start diagnosis from the beginning

  1. Settings - General - Show Advanced
    – Make certain DEBUG logging is enabled & VERBOSE is disabled.
    – SAVE if any changes

  2. Settings - Library - Show Advanced (Set it this way)

    Screenshot from 2025-10-27 16-10-55
    Screenshot from 2025-10-27 16-10-55804×874 67.4 KB

  3. Restart PMS

  4. Wait 3 minutes (Completely idle)

  5. Download the server logs (Settings - Troubleshooting - Download Logs)

  6. Attach the ZIP file it gives you here with your next post

9

Attaching

10

Looks like you may have at least a DNS issue Oct 24, 2025 13:05:22.319 [140027781606200] WARN - [HttpClient/HCl#cb2] HTTP error requesting GET https://v4.plex.tv/pms/:/ip (6, Couldn't resolve host name) (Could not resolve host: v4.plex.tv)

11

24.10.2025 around 13 there was issue with ISP modem. Later no issues but still PMS was not refreshing

12

Looking deeper, your file share seems odd: /share/ZFS530_DATA/.qpkg/CayinMediaViewer/CodexPackExt/share/Media and your file naming is really bad.

13

Hmm…

“/share/ZFS530_DATA/.qpkg/CayinMediaViewer/CodexPackExt/”

this part was added automatically by PMS selection.

In fact path is:

/share/Media

Will adjust them manually and observe :slight_smile:

14

This was added by PMS? I don’t do that during installation because I have no visibility to other shared folders or packages

15

It looks like this.
I select to add media source. This is first what I see so I pick share as there are all shared folders on QNAP:

obraz
obraz366×458 3.89 KB

and it automatically set path as:

obraz
obraz571×400 6.5 KB

after selecting “Media” it set path:

obraz
obraz559×207 4.17 KB

On Qnap “Media” is set as shared folder so it is like top hierarchy one:

obraz
obraz229×332 7.84 KB

16

@marcin_487

I see the error.

On ZFS, each shared folder is UNDERNEATH the ZFSxxx_DATA name.
You have to look inside each one to find the real shared folder name.
( It is a royal “pain in the ******” but that’s how QNAP did it. Other ZFS implementations do it such that the dataset name is the shared folder name )

The app you’re using isn’t compatible. You can’t use it with PMS.

What you need to do. (what many do)

Either:

A: Create (painfully) each library section as it exists without using the app by browsing into the ZFSxxx_DATA directory first.

-OR-

B: (as many do)

  1. Create different folders under Media (which already exists)
  2. Move your media under that folder
  3. EDIT the Plex Library sections to point to the appropriate /share/ZFS18_DATA/xxxxx subfolder
17

Looks like that is this QTS file management logic :slight_smile:

CayinMediaViewer is Qnap app I`m not using but looks like it added “shortcut” folder in root path.

Edited paths and “ZFS18_DATA” is not needed.

Just instead of:

/share/ZFS530_DATA/.qpkg/CayinMediaViewer/CodexPackExt/share/Media

used:

/share/Media

Now I can see added file. In case there is still issue will reopen :slight_smile:

Thank you all :slight_smile:

18

I had the same issue, but on my synology drive. I have one instance of Plex on my Mac, and one on my DS420+, both using the same source music library on my Mac. The DS420+ instance wouldn’t rescan but the Mac Instance was fine. Both had same settings - automatic rescan and only scan folder with changes. Eventually I realised that there was an additional setting on the DS420 instance - Include music libraries in automatic updates - the box was un-ticked by default. Apparently this option is there because some Linux systems have a limit on the number of watched directories, which can be an issue with large libraries. With the box ticked the automatic scans work perfectly on both instances. Not sure if this helps with your particular setup, but may be useful to others who have this problem…

19

I had this on Synology NAS. You need to tick the “Include music libraries in automatic updates” box”.

20

CodexPack will bite you in the *** every time.
It’s an application which only interfaces with QNAP apps (multimedia).

Use the real shared folder name (path)

There are always problems with compatibility.