Nec ND-2500A

Review Pages

1. Retail Package - Installation
2. Data CD Reading Tests
3. CD Error Correction Tests
4. DVD Reading Tests
5. DVD Error Correction Tests
6. Protected Disc Tests
7. CD-DA - DAE Tests
8. CD Recording Tests
9. 3T Jitter Tests - Page 1
10. 3T Jitter Tests - Page 2
11. C1 / C2 Error Measurements
12. DVD Recording Tests
13. KProbe PI/PO Error Measurements
14. Conclusion

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

Media	Code	Speed
Mitshubishi Chemicals 8x DVD+R	MCC003	8x
CMC Magnetics 8x DVD+R	CMC MAG E01	8x
Plextor 4x DVD+R	YUDEN000 T01	8x
Taiyo Yuden 4x DVD-R	TYG01	8x
CMC Magnetics 8x DVD-R	CMC MAG AE1	8x
TDK 8x DVD-R	TTG02	8x
Mitshubishi Chemicals 4x DVD-R	MCC 01RG20	8x
Ritek 4x DVD-R	RITEKG04	4x
Mitshubishi Chemicals 4x DVD+R	MCC002	4x
Mitshubishi Chemicals 4x DVD+RW	MKM A02	4x
Mitshubishi Chemicals 4x DVD-RW	MCC 01RW4X	4x
Maxell 4x DVD+RW	PHILIPS 041	4x
JVC 4x DVD-RW	JVC0VictorD7	4x

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).