Please explain what DVDInfoPro or Nero CD-DVD Speed test for.

[bgc99]

I think they both test for the same stuff, but I'm looking at the Nero CD-DVD speed Disc Quality screen now and would like to know what the tests measure and what the results mean.

What are PI Errors, PI Failures, PO Failures, Jitter exactly? I did notice that the error/failure rate was higher when setting the scanning speed to the max. Since a movie plays at 1x, what speed should be used for quality scans? What results indicate that a movie will or won't play properly?

If these discs have so many errors, how can they be used to archive critical data?

Thanks,
BGC

[redwudz]

Video is pretty tolerant of errors. Missing some info is acceptable, but not desirable. From what I understand, scanning at a lower speed will give more accurate results. I don't know that much about PI failures. Others should have better info.