File:DVDLayerTypeChecker.zip

Summary
DVD LayerType checker created by pcbbc.

Used to check a burned disc to see whether your DVD burner is capable of burning discs with layertype set to 1 (READONLY) which is required for discs to be readable by an Xbox or Audi navigation system (RNS-E). Not to be confused with booktype.

Source: https://www.ttforum.co.uk/threads/imburn-rns-e-2018-map-update.1847605/