In older DSS versions, the problem of losing the ACL configuration after an update can occur.

The solution is to save your ACL configuration. To do this, you will need to export UIDs and GIDs and then import them after you do the update.  Here are the instuctions on how to do that:

1. Log on to the GUI.
2. Go to CONFIGURATION -> NAS Resources -> Users (left pane) -> UID Mappings.
    Click the download button and save your Users' database.
3. Follow the same procedure for saving your Groups' database.

For importing the database(s), do the following:
1.  Log on to the GUI.
2.  Go to CONFIGURATION -> Nas Resources -> Users (left pane) -> UID mappings 
     Click the upload button to upload your saved Users' database.
3.  Follow the same procedure for uploading your Groups' database.