NERO Test Drive

I have bought a new NEC ND3520A and I am just testing the drive using a maxell CD-R 80. After a few minutes I get the message

Error - NO ADDITIONAL SENSE INFORMATION

as seen in attached pic. What does this mean?

Also why does the burn start off slow and then gradually increase speed over time?

John

The gradual speed increase is normal for burning at high speeds. The discs can be written at faster speed at the outer part of the disc than the inner.

Thanks. Anyone any idea as to the peaks it loses and why the error message?

John