BenQ DW822A 8X Dual - Page 11

DVD Recording Tests

- Writing Performance

The new BenQ DW822A 8x supports both DVD-R/RW and DVD+R/RW writing. For the plus writable format the drive supports the maximum current avaliable speed of 8x while for the minus format, speed is restricted at 4x. On the rewritable family the supported speeds are 4x for DVD+RW and 2x for DVD-RW.

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-R

As we mentioned before, the drive supports 4x maximum writing speed for DVD-R. The screenshot below shows smooth writing process with CLV writing strategy. The process started at 4.0x and finished at 4.01, resulting according to NeroCDSpeed in an average speed of 3.99x.

4x DVD+RW

For the +RW media the supported writing speed is 4x. That speed was confirmed by NeroCDSpeed 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 because of the smart writing control.

4x DVD-RW

Just like the +RW disc, the -RW disc was written with CLV strategy. The supported writing speed for the minus rewritable media is 2x and therefore the test reported the same start, end and average speeds of 2.4x.

- Burning Tests

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

On plus writable and rewritable formats the three devices support the same maximum writing speeds, 8x and 4x respectively. The graph shows that the BenQ 822A was the fastest on +R writing at 8:11min. With the minus format the supported speed of BenQ is only 4x and therefor the drive finished the writing task in just under double the time compared to the other two drives.

• That's 8x DVD+R

• MCC 4x DVD-R

• MKM 4x DVD+RW

• Kagaku 4x DVD-RW

- Packet Writing Tests

For this test we copied a 403 MB file (412.822 KB) from Hard Disk (on the same PC as the recorder) in to formatted RW media, through Windows explorer (drag and drop).