- 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 fully burn the discs.

Mitsubishi Chemicals 8X DVD+R DL @ 8X

The specific DL disc from Mitsubishi Chemicals is certified for 8X burning, one of the few if not the only one. Since it is new, most burners don't support it at 8X, while it seems the Memorex does, being a quite new burner.

According to the graph, the writing strategy is Z-CLV. The reported time of 19:37min is a little high, something that can be explained by looking at the graph. The drive starts the burning process at 4X and then speeds up to 6X. After 2.2Gb, the speed reached the maximum 8X which it didn't maintain for very long, where just before the layer change was reduced down to 6X. The last 800MB were burned at 4X. Some of the NEC drives that we have tested, had the same performance with this type of media.

Mitsubishi Chemicals 4X DVD-R DL @ 6X

This DVD-R DL media, according to manufacturer, is certified for 4X recording while the Memorex burned it at 6X. The writing strategy is Z-CLV. Most of the disc's surface was burned at 6X apart for 900MB at the beginning and at the end where the speed was 4X. Once again, this is something that had also happened with the latest NEC drives...