Philips DVDRW885K Double Layer - Page 11

DVD Recording Tests

- Writing Performance

The new Philips DVDRW885K supports, as we had expected, only DVD+R/RW writing. The new feature here is the DL recording ability.

2.4X DVD+R DL

8X DVD+R

Nero CDSpeed confirmed the 8x maximum writing speed. The process started at 4.90x and finished at 8.02x resulting in an average speed of 7.43x. The writing strategy of the drive for the plus writable format was Z-CLV and NeroCDSpeed confirmed the smart writing control as shown on the screenshot below.

The spikes on the transfer graph are as a result of the Walking Optimal Power Calibration (WOPC) feature. Burning power is dynamically adjusted to ensure the writing quality throughout the whole burning process.

4X DVD+RW

For +RW media, the supported writing speed is 4x. That speed was confirmed by Nero CDSpeed after the end of the writing emulation. The test started at 4.04x and finished with an end speed of 4.04x while the reported average speed was 3.96x (due to the negative spikes caused by the smart writing control).

- Burning Tests

The following graphs show the maximum writing speed of the three devices with all available DVD writable and rewritable media.

With the plus writable and rewritable formats, the three devices support the same maximum writing speeds, 8x and 4x respectively. The graph shows that the Philips DVDRW885K was the fastest on +R writing at 8:11min. With the minus format, the supported speed of the Philips drive is only 4x and therefore the drive finished the writing task in just under double the time compared to the other two drives.

• Mitsubishi Kagaku DVD+R DL

DVD Overburning

The Philips drive failed Nero's overburning test.