When running the Transfer rate test on some rescent discs, I've gotten perfect results when I run the test on my BenQ 1620 (which max's out at approx. 7x ), but when I run the test on my Liteon 167T DVD-ROM (firmware 9S16) I get some spikes towards the end.(between 14x & 16x) The same disc(s), have a perfect transfer rate test when I test using my Plextor 716A.(speed max's out at 12x)
So if a disc "spits' & "sputters" toward the end of a transfer rate test on a DVD-ROM drive between speeds 14x & 16x, would you say it's a bad disc? But yet the disc runs (transfer test) perfectly at lower speeds (like at 7x on BenQ & 12x on Plextor), is it ok? What's considered the max speed for transfer rate testing? Is 16x too fast for testing?
BTW, some of the discs that had spikes between 14x & 16x on the DVD-ROM drive, had excellent CD-DVD Speed scans and the discs were also tested in Kprobe. (scored 99 in CD-DVD Speed) (Kprobe PIF=2 PIE=6)
Attached are two scans showing the problem areas. But again, these discs test thru Transfer rate perfectly on every other drive in my system. These drives are slower tho.