It is quite important to regularly update the firmware of your DVD recorder. Firmware updates can significantly improve the recording quality of your recorder and add compatibility for more DVD±RW media. Basically the firmware contains a database of media types and the settings/tunings for the specified media, that the recorder will use as you burn [...]

Firmware updates for Sony NEC Optiarc recorders, including but not limited to the following models:
ND-1100 P-ATA, ND-1300 P-ATA, ND-2500 P-ATA, ND-2510 P-ATA (GEN),ND-2510 P-ATA(GNP o. GNF), ND-3500 P-ATA, ND-3520 P-ATA, ND-3540 P-ATA, ND-3550 P-ATA, ND-3551 P-ATA, ND-3570 P-ATA, ND-3571 P-ATA, ND-4550 P-ATA, ND-4551 P-ATA, ND-4570 P-ATA, ND-4571 P-ATA
AD-5170 P-ATA, AD-5170 S-ATA, AD-5200 P-ATA, AD-7170 P-ATA, [...]