Migrating DSM 6 to 7 - PMS failing to migrate

[ChuckPa]

@frolovm

Uninstalled PMS, Upgraded DSM.
Initially the install finished without attempted migration. It finished very quickly with a success message.
When logged in Plex, I saw two server options with one of them (the old one) inaccessible and the new one accessible but empty.

The installer can start a migration if it doesn’t have permission / can’t see an old server data so it sets up a new one (unfortunate side effect of “permission denied”)

Details are here. Use “Scenario 2”

Be 100% certain to “Apply to this folder, sub-folders, and files” when you grant PlexMediaServer Full Control of the Plex shared folder.

1. Uninstall with ERASE (Erase the empty DSM 7 server)
2. Grant SystemInternalUser PlexMediaServer FULL CONTROL of your “Plex” shared folder.

Now install again.

It will immediately start migration . (Sits at “Installing”)

In a new tab “Plex/Migration.log” will let you follow the progress.
It appears after 2-3 minutes.

Synology FAQ - Questions, Answers, and a few How-To's

FAQ 27 - Migrating an existing PMS from DSM 6 to DSM 7 Upgrading PMS from DSM 6 → DSM 7 DSM 7 no longer allows us to go find the metadata directory and use it across volumes before starting PMS (This is the lack of “root” privilege blocking). As such we require the following two conditions are met we will attempt to automatically migrate you; You have an existing DSM 6-created PMS installation and PMS is installed on the SAME STORAGE VOLUME as the “Plex” shared folder (this is critical) …