I tried searching for this, but couldn’t find anything besides some NEC drives misreporting PI errors.
I have a really old Philips DVD+RW-D28 burner, and just started trying to verify my discs after I had a couple bad burns. When I do a CD-DVD Speed disc quality scan on a CD, it works fine. The 3 I tried all came out with quality scores above 98, and fewer than 12 max PI errors I believe. When I do a DVD, my numbers are impossible. Here’s a scan I just did (it actually failed at the end - it was a bad burn, but my other scans have all started like this):
Drive: PHILIPS DVD+RW-D28
Disc: DVD+RW (RICOHJPN W11)
Selected speed: Maximum
PO failures: n/a
Elapsed time: 133:31
Number of samples: 8964
Average scanning interval: 16.00 ECC
Glitches removed: 0
From what I’ve read those numbers are impossible. My DVDs all read fine, and my burning software verifies the data with no errors. Is my drive just incompatible with Nero’s CD-DVD speed, and so it reports errors incorrectly? I am also having the problem where 7x is the only speed option, even though my drive is max 2.4x (I read a lot of Lite-On drives do this), so I thought that may provide clues to the problem. I’ve tried 3 different media (Sony, Memorex, and Verbatim) all with similar results.
I’ll post a full quality scan of a better disc later, but they seem to take 2-4 hours. Any help, or links to relevant threads would be appreciated. Thanks.