DVD+R Dual Layer DVD / Lite-On SOHW-832S (page 3: Reading compatibility)

The reading compatibility

The DVD DL burning process is close to the classic DVD+R and the recording of pressed DVD9. The objective is the maximum reading compatibility. You have to be able to burn a DVD9 and be able to re-read it with a DVD-Rom and a DVD player. Is the objective reached? Well note quite.

In order to test the Dual Layer reading compatibility, we burned a disc with Nero Burning Rom 6 and tested it with several devices. It is a copy of the DVD movie Casino, initially a DVD9 integrally burned after ripping it via DVD Decrypter. It has to be said that copying a DVD9 is easier as it is not necessary to reduce the quality, remove the bonus or the different languages to put it on a DVD or a DVD+R.

Some of the DVD player only read the beginning of the DVD, so we checked the accessibility of the whole DVD. As it is possible to change the book type, we burned two DVDs for this test: one with the original bit setting in DVD+RW and the other with a modified bit setting in DVD-ROM. Liteon provide an utility to modify the medias boot type (before the +R burning) but it doesn´t work with the SOHW-832S. Fortunately, the bit setting module integrated to Kprobe works perfectly.

Changing the book type allow a better recognition of the media red, because some players base their ability to read a media only on the bit setting. If the player sees a code which doesn´t belong to its database it rejects automatically the disc. It happened frequently with media burned in DL. By changing artificially the book type it is possible to avoid this reject and gives a chance to the DVD player.