Ok, here you go.
Things to understand.
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As you read this, you’ll notice there is a race condition
– You need to grant “PlexMediaServer” Full Control of the Plex shared folder (and all sub-folders and files) for your DSM 6 installation to migrate to DSM 7.
– You’ve not yet installed the DSM 7 app so there is NO ‘PlexMediaServer’ user yet. -
Under normal circumstances where the Plex shared folder has the default ACLs, I can detect this and show the correct info/errors in the final popup message as the install exits ( DSM only gives me one way to communicate installation errors ).
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If I cannot detect everything correctly, the DSM 7 installation will proceed AS IF a new fresh install and completely ignore DSM 6 Plex shared folder.
– This is where we have to take a 1/2 step back and redo it.
The whole process, inclusive of half step back is:
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Install the DSM 7 app
– If it installs quickly then it likely failed without seeing the Plex shared folder.
– if it issues an error then it knows it fails and you need grant permissions. -
Confirm you still have Plex/Library/Application Support/Plex Media Server
( Nothing gets deleted by the installer unless you tell it to so don’t panic ) -
With confirmation “Plex” shared folder still has all the DSM 6 Plex
– Uninstall the DSM 7 Plex app; Uninstall (new menu selections) with the ERASE radio button option. This ONLY REMOVES the errant/empty DSM 7 data -
Now use File Station → Plex share → Properties → Permissions
– As I show in the how-to, grant all ADMINISTRATIVE, READ, and WRITE permissions to the new “PlexMediaServer” SystemInternalUser.
– This will take a bit to complete (depends on how much you have indexed in Plex) -
When you install the DSM 7 SPK file again, Now it will sit there silently at “Installing” as it does all the work.
– Don’t interrupt it.
– Best not to refresh the page (you’ll not know when it’s done) -
In a new tab, open the syno desktop. Plex share – Watch for “Migration.log”
– In Migration.log, you’ll be able to follow the progress.
– When “Cleaning” is completed, you’re all done
In all this, it’s of paramount importance you not forget the “Apply to this folder, sub-folders, and files” when granting permissions.
Read this – Most users will want to start at “Scenario 2, Step 5”
The How-To also covers other configurations where the Plex shared folder gets split or encrypted (DSM 6)
