- Writing Tests

We burned some DVD+R DL and DVD-R DL discs with data content. For this task we used "Create Data Disc" from Nero CDSpeed in order to burn the entire disc.

Mitsubishi Chemicals 8X DVD+R DL @ 10X Z-CLV

The specific DL disc from Mitsubishi Chemicals is certified for 8X burning. Since it is quite new, most burners do not support it at 8X, while Plextor supports it not only at 8X burning, but also at 10X... :-)

According to the graph, the writing strategy is Z-CLV. The reported time of 15:21min is rather slow, something that can be explained with the graph. The drive starts the burning process at 6X and then increases gradually up to 10X before dropping back down to 8X for almost 100MB. Then it speeds up to 10X for while before stepping down to 8X and 6X just before the layer change. It remains at that speed until the 4.6 GB mark, at which point it steps up to 8X and remains there until just before the end, where it decreases down to 6X.

Mitsubishi Chemicals 4X DVD-R DL @ 6X CLV

Using CLV strategy, the drive managed to write at 6X burning speed, which is the maximum speed for the drive with -R DL media.

RICOH 8X DVD+R DL @ 8X P-CAV

While using P-CAV writing strategy, the drive managed to complete the writing test in 16.39:mins, reporting an average speed of 7.13X. The media was burned at its certified speed, but the 8X speed was not used over the entire DVD.