OK, I’m not really expert in the whole recording quality area - to date I’ve been happy if Nero did a successful data verification.

But I’m burning some important data now and want to make sure I get the best burn possible. I’m using TY T02 media, which is rated 8x and can be burned at up to 16x by the NEC 3540a. I burned the same data at 12xand 16x. I then used Nero CD-DVD speed to scan and fund that the 16x burns were better with lower Pi failures (3 vs. 12) and higher quality ratings (94 vs. 67). So I’ve been burning at 16x since.

Today I decided to test a disk done at 16x and found the quality to be terrible. 280 Pi failures and a zero quality index, despite the fact the disk was quite readable.

Then I tested again but this time reduced scanning speed to 8x and now I got awful results again but not that bad, around 27 Pi failures and Quality=67.

Then I read that with NEC drives you need to change the ECC sampling from 8 to 1, which I did and tested my media again at 16x scan speed. This time the result was completely different. I had 3 Pi failures and a quality rating of 94.

The whole thing is driving me crazy. How can the same media have such wildly different results?

Can anyone please help me understand what’s going on?