'dvd identifier' retrieves and interprets the pre-recorded information that is present on dvd media (dvd+r, dvd+r dl, dvd+rw, dvd+rw dl, dvd-r, dvd-r dl, dvd-rw and dvd-ram) and on blu-ray media (bd-r and bd-re). This information contains a variety of parameters such as disc manufacturing information and supported write speeds.