NEC ND-2500A DVD±RW recorder - Page 12

DVD Recording Tests

- Writing Performance

The NEC ND-2500A supports DVD-R/RW and DVD+R/RW writing. The maximum supported speed for both DVD+R and DVD-R is 8x (4x~8x Z-CLV), and 4x CLV for DVD+RW and DVD-RW media.

Currently, only a few 8x certified DVD-R media are available on the market. The supported 8x DVD±R media which we tested came from Mitsubishi Chemicals, Taiyo Yuden, JVC and CMC Magnetics.

8x DVD+R

An 8x DVD+R disc from Mitsubishi-Kagaku was used to check the 8x writing strategy of the drive. The software used was Nero CDSpeed, and its "create disc" function.

The drive started writing at 4.13x, maintaining this speed until the 800MB address mark on the disc, where the drive steps up to a little over 6x until 2.2GB where once again the step up to 8.29x writing for the rest of the recording (hence Z-CLV). The average speed is 6.81x.

8x DVD-R

Just as with the previous DVD+R media the drive started the writing at 4.13x, with steps up to 6x at the 800MB address mark and 8x at 2.2GB. The average speed was 6.81x.

4x DVD+RW

4x DVD-RW

- Burning Tests

The best recording times are illustrated in the following table after burning 4315MB of data on various DVD±R, DVD±RW media, using the maximum allowed writing speed for each disc. For comparison, we also include the writing times for the Pioneer DVR-107D.

The NEC drive was faster with DVD±RW media and the Pioneer with DVD±R. The times are quite fast.

The following screen shots were taken from Nero, after successful burnings. The amount of data is the same for all the tests.

• CMC Magnetics 8x DVD+R

• Taiyo Yuden 8x DVD-R

• Mitshubishi Chemicals 4x DVD+RW

• JVC 4x DVD-RW

The table above presents the writing speeds, media name and media code for the various discs used.

Click on the link below for official media list provided by Nec:

Media list for ND-2500A

- Packet Writing Tests

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