Just received my Plextor TY T03 (TH000021 batch) discs today and started testing them right away on my BenQ DW1620. I was quite curious for the results as this drive is considered to be outdated.
I've always known my drive is an odd one, I have to scan CD-R's at 16x or the amount of C1 errors goes up quickly towards the end of the disc (note: they are burned in another drive). And as I've discovered recently, this happens with DVD+R's as well when I scan them at 16x (they are burned in the DW1620). Example:
You can also see that the amount of PIEs drops instantly when the reading speed decreases (yellow arrows). This prooves that there is a relation between reading speed and amount of errors. I never noticed this since my old version of CD-DVD Speed only allowed reading at 8x and everything looked good at that speed.
The problem I am now having with my new T03 discs is that this anomaly continues into the lower reading speeds. Instead of 16x, I'm now having this at 8x and even more extreme at 16x.
Here are the scans of a T03 in the following order, reading @ 1x, 4x, 4x (2nd scan), 8x, 16x:
Yes, this is one and the same disc. The last one is just absurd.. Has anyone encountered something similar before? And how should I interpret the results? At 4x it seems like a pretty good burn!! But at 16x it looks like crap. Also notice the difference between the T02 and T03 scans, both at 16x.
Here is also a close-up of the last scan, notice that at the start there are peeks of up to 50 PIE every time the drive slows down.
A little help please.