It seems that forcing dismount by passing -D via CLI doesn't have the same outcome as doing the same via GUI. From time to time, using -D fails with an exit code of 2. Yet, the GUI is able to forcefully dismount the drive. The following arguments are used when creating the drive: -a -t vm -o logical,format:ntfs

This was observered in v3.1.1000.

Are there some hidden arguments that can be used to achieve the same result the GUI offers?