Can't start SMB/CIFS service - Internal Server Error 500

Post the full error. You can copy it to the clipboard from the notifications icon.

I don't know how to interpret that error. Someone else will have to see it.

To me it looks like the config database is corrupted. Have you modified it manually?

There is no automation for this. If you don't have a backup you will probably have to reinstall OMV.

As a last attempt you could try to remove any reference to home directories in the GUI and add the corresponding lines to the homedirectory tag. It must come after the <usermanagement> tag and before the next <users> tag. In my config.xml it looks like this:

    <usermanagement>
      <homedirectory>
        <enable>0</enable>
        <sharedfolderref></sharedfolderref>
      </homedirectory>
      <users>

But I don't guarantee that that will work.

What you have done is like starting from scratch (more or less...). Then I think it would be enough to press the Mount an existing file system button in the Storage>File Systems tab

Zitat von soundscape

Rather than that, given that I had a rather minimal config, I went back to the default by copying /usr/share/openmediavault/templates/config.xml to /etc/openmediavault/config.xml.

Now I just have the issue that under Storage > Files Systems > Mount, my old BTRFS RAID 5 md0 no longer appears in the dropdown. However I can still see it in lsblk. Is there a way I can import it, or somehow else allow the GUI to 'see' it?

You need to restart the engine process after you've replaced the database file. Run monit restart omv-engined to do so. After that all existing file systems should be displayed in the drop-down box.

Zitat von soundscape

That hasn't worked. The drop-down is still unpopulated.

Which button are you pressing in the file system page to mount an EXISTING file system?

Is it possible that your filesystems are still mounted? If so, manually unmount the filesystem and give it another try to mount it via UI.

The file system page only shows file systems that are configured via OMV. The dashboard widget instead shows ALL mounted file systems, independent if it is mounted via OMV or something else.