Today I finally got to testing some CD-R’s on my second BenQ drive. The first one had some read back problems with DVD+R’s: one time it said a disc had 19000 PIE’s and another time the same disc had 6000 PIE’s.
Luckily my second BenQ drive doesn’t have this problem, although I’m experiencing something similar with CD-R’s now.
I began with a burn @ 40x and tested the disc afterwards. I got a VERY good result @ 40x on my first BenQ drive: 1918 C1 errors, so I hoped my second BenQ drive would give about the same result.
This wasn’t the case at all: 8100 C1 errors. I burned another disc @ 16x: 6066 C1 errors. I noticed the errors increase rapidly after 40min on the graph.
I began scanning other discs that didn’t show this behaviour on my first BenQ, some of them have the same thing, others not. Strange.
Then I noticed something: whenever my drive slows down, the amount of errors decreases. I marked this on the first picture below in yellow. So my first thought was to scan the disc at a lower speed setting, and you guys can see the result below. I tested this with two different discs, same results.
Now, how must I interpret this? Is my BenQ a crappy CD-R scanner at higher speeds?
At two points I actually got < 2000 PIE’s when scanning this disc at 40x, but most of the time the graphs are like below. I don’t have this with all my discs either, some of them don’t show this behaviour even after several scans. I thought it was a batch problem but both TG1175’s and TG1313’s can have this problem, so at the very least I know they’re not from the same package (still have figured out the true meaning of that serial).
It’s not a writing problem either, because both discs burned on my Plextor and my BenQ have it. And also all tested discs had very low PIE’s on scans with my first BenQ.