Sony DRU-840A detail information

DVD+R/-R Double Layer writing performance and quality

The Sony DRU-840A supports the DVD+R DL/-R DL standard for writing Double Layer/Dual Layer discs with a size around 8.5 GB at a writing speed of 12X on supported media.  At this time your review team has 10X +R DL and 4X –R DL media available for testing.

Testing procedure:

We created an ISO Image from a pre-authored DVD-Video compliant file set, with a total on-disc size of nearly 8.5GB. We then wrote this image file using Nero Burning ROM 7. Below are the results:

DVD+R DL

There is a cluster of PI and PIF errors at the layer break, but our read-back test is perfect. The result is good.

DVD-R DL

As we mentioned above the Sony DRU-840A is capable of writing DVD-R DL discs at 10X, however we do not have any of the high speed DL dash media for testing at this time.  We did use a 4X Verbatim DVD-R DL disc for our test.  You will see those results below:

PI errors at the layer break but within specification. PIF errors spike in the second layer but our read-back test shows no problems. The result is ok.

Standalone DVD-Player compatibility

We only have 2 standalone DVD-Players available to test the DVD+R DL media (Book Type: DVD-ROM) and the DVD-R DL media (Book Type: DVD-R); a Panasonic DMR-EZ475V and an Insignia TV/DVD combo player.

Compatibility results: 

The Verbatim DVD-R DL freezes at the layer break in Insignia Unit.  We would like to mention, that the compatibility issue with standalone DVD Players and the DVD-R DL media format is also caused by incompatibilities with the standalone devices used in this review, as we know the DVD-R DL format has inferior compatibility compared to DVD+R DL especially with older standalone players.

Summary

The Sony DRU-840A burns DVD+R/-R DL with good results.

Let’s head on to the next page and our DVD-RAM writing tests....

DVD-R/RW writing performance

DVD-RAM writing performance