Plex will not recognize mapped drives after reboot

after windows restart, plex does not recognize windows drive mappings

  • I can play music and videos using the drive mappings in file explorer
  • plex gives me “Please check that the file exists and the necessary drive is mounted.” error
  • no recent config changes or updates in windows or synology
  • Plex server 1.12.0.4829
    -Windows 10 version 1709 KB4088785
  • Synology DSM 6.1.5-15254
  • mapped to M:/ (\ip address\music), P:/ (\ip address\photo), and V:/ (\ip address\video) drive

Are username and password required to access these shares?
If so, make them exactly the same as you use to logon to the Windows user account.

I don’t recommend to use mapped drive letters. They are notoriously unreliable and will get restored relatively late after a Windows reboot.

Either figure out a way to start Plex Server with a large delay
or use UNC paths instead: https://forums.plex.tv/discussion/comment/1291830#Comment_1291830

You might try inputting them into Plex using the server path instead of mapping drives:
\servername\foldername\

Also, there could be permission issues?

I had issues running Plex as a service in this regard. Plex would load before the dives mapped. If you tie direct to the server folder structure, this won’t be an issue.

I appreciate the input!

These drive mappings have been working fine for weeks, and were working just before the reboot. I also tried scanning the library using all types :

  • \ip address\directory
  • \windows name\directory
  • drive mapping letter

After the library was scanned with all three, I still could not access the movies.

I’ve also made sure that plex has full permissions to all shared folders on synology

@linuxguy said:
After the library was scanned with all three, I still could not access the movies.

When you log on to the windows box with the same user credentials which the Plex server uses,
can you paste \\ip address\directory into the address bar of the file explorer and you will brought to the network share immediately?

How does the Plex media info of a movie look like, after a finished ‘Scan Library Files’?

@OttoKerner said:

@linuxguy said:
After the library was scanned with all three, I still could not access the movies.

When you log on to the windows box with the same user credentials which the Plex server uses,
can you paste \\ip address\directory into the address bar of the file explorer and you will brought to the network share immediately?

I created a local windows 10 user account with the same credentials as my admin Plex user. I entered “\10.0.0.100” in my file explorer and instantly listed music, photos, and video shares. From there I could play videos and music and display photos. On the windows side, I can login as any user and access content, it appears that Plex has decided it’s taking the day off.

How does the Plex media info of a movie look like, after a finished ‘Scan Library Files’?

I turned off “empty trash automatically” and scanned. This is what I see

This is the library with all three types of mappings in the image above.

I turned off “empty trash automatically” and scanned. This is what I see

The log entry from this scan below. It looks like Plex only used the first folder in the library

Apr 04, 2018 15:33:47.073 [10236] DEBUG - “C:\Program Files (x86)\Plex\Plex Media Server\Plex Media Scanner.exe” --scan --refresh --section 6
Apr 04, 2018 15:33:47.739 [3980] DEBUG - Opening 20 database sessions to library (com.plexapp.plugins.library), SQLite 3.13.0, threadsafe=1
Apr 04, 2018 15:33:47.868 [3980] DEBUG - Scanning Movies Misc using en(Plex Movie Scanner) with 6 current media items and 2 section locations in the database…
Apr 04, 2018 15:33:47.869 [2192] DEBUG - HTTP requesting GET http://127.0.0.1:32400/:/metadata/notify/cullTimeline?librarySectionID=6&sinceTime=1522869227
Apr 04, 2018 15:33:47.871 [2192] DEBUG - HTTP 200 response from GET http://127.0.0.1:32400/:/metadata/notify/cullTimeline?librarySectionID=6&sinceTime=1522869227
Apr 04, 2018 15:33:47.998 [3980] DEBUG - Performing a scan with ‘Plex Movie Scanner’ (language: en virtual: 0).
Apr 04, 2018 15:33:47.998 [3980] DEBUG - * Scanning \synology916\movies\special interest
Apr 04, 2018 15:33:49.115 [3980] DEBUG - * Marking media not available in \synology916\movies\special interest
Apr 04, 2018 15:33:49.143 [3980] DEBUG - * Taking 0 items out of the map (which has 6 items) for being unavailable.
Apr 04, 2018 15:33:49.143 [3980] DEBUG - * Taking 0 directories out of the map (which has 1 dirs) for being unavailable.
Apr 04, 2018 15:33:49.146 [3980] DEBUG - Performing a scan with ‘Plex Movie Scanner’ (language: en virtual: 0).
Apr 04, 2018 15:33:49.146 [3980] DEBUG - * Scanning V:\movies\special interest
Apr 04, 2018 15:33:49.146 [3980] DEBUG - * Marking media not available in V:\movies\special interest
Apr 04, 2018 15:33:49.146 [3980] DEBUG - * Taking 0 items out of the map (which has 6 items) for being unavailable.
Apr 04, 2018 15:33:49.147 [3980] DEBUG - * Taking 0 directories out of the map (which has 1 dirs) for being unavailable.
Apr 04, 2018 15:33:49.161 [3980] DEBUG - Removing 6 media items that were left.
Apr 04, 2018 15:33:49.161 [3980] DEBUG - Soft-deleting media item 26186.
Apr 04, 2018 15:33:49.175 [3980] DEBUG - Soft-deleting media item 26187.
Apr 04, 2018 15:33:49.176 [3980] DEBUG - Soft-deleting media item 26188.
Apr 04, 2018 15:33:49.177 [3980] DEBUG - Soft-deleting media item 26189.
Apr 04, 2018 15:33:49.178 [3980] DEBUG - Soft-deleting media item 26190.
Apr 04, 2018 15:33:49.179 [3980] DEBUG - Soft-deleting media item 26191.
Apr 04, 2018 15:33:49.180 [3980] DEBUG - Removing 1 directories that were left.
Apr 04, 2018 15:33:49.197 [3980] DEBUG - Refreshing section 6 of type: 1
Apr 04, 2018 15:33:49.209 [7348] DEBUG - Refreshing 6 IDs.

Are you running Plex as a system service?
Because if you do, you cannot use mapped drive letters at all.

I installed the plex service .msi last week, but de-installed . I wonder whether there are any residual settings…

@linuxguy said:
I wonder whether there are any residual settings…

I don’t think so.

What happens if you remove the drive letter V and the hostname reference, and leave in only the one with the IP address?

I removed the mapping from my folder and replaced it with \\ip address\directory, re-scanned the library and it still can’t find the files.

The odd thing is that the ONLY library that works is my photo library, it is NOT configured with a drive mapping.

Are you using a password to login to the user account on this Windows machine?
If you don’t have a password, there are numerous examples where it doesn’t work reliably to access network shares without password.

And don’t rely on Windows storing differing user credentials for the NAS share. Always bring them into sync between Windows user account and network share.

In the network and sharing settings of Windows there is a setting where you can pick whether Windows shall rely on ‘Homegroup’ or traditional ‘user & password’ sharing.
Always pick the latter.

It’s working again. My assumption was that my windows config was not correct so I started with an update for my 2016 ethernet driver. Updated the driver, rebooted, waited for plex to start and viola the mapped drives appeared in the library configurations again! I’m getting informational security messages "login was attempted with explicit credentials. So I’m going to revise the credentials for my mappings short term and look then into the plex service and UNC library configurations.

I have the same issue, my mapped drive is onedrive on the cloud, so, I don’t know if I could use the server path or if could be permisssion issue

I’m at a loss right now. This started happening to me within the past few days… First with the previously mapped letter drive (which as worked flawlessly for over a year), then I switched to IP, worked then dropped… then UNC which lasted two days… now bupkis. I’m tempted to just slick the damn Win10 machine and start over again.