thanks again for wonderful tests.
I must agree with you that Toshiba's 1612 and 1802 are not very useful in regards to their transfer rate graphs (when trying to assess disc readability / quality estimates): they barely flinch even with supposedly really bad discs (i.e. discs that measure sub-par in kProbe/Plextools).
In fact, this leads me to believe that the dvd error correction on those drives could be less than stellar. Their performance in reading (transfer speed) is so superior to anything else I've seen, that it leaves a small doubt in my mind as to the actual error detection/correction capability of those drive (for dvd media). After all, if they had limited error correction, they wouldn't have to slow down on problematic discs, unless they completely lost sync signal...
Anyway, I have been unable to find any good tests of SD-M1802 (or 1612) on the web that shows the dvd media error correction capability of the aforementioned drives.
If you know more about this (or can test with your A-bex dvd test discs), please chime in.
PS Do you have any Panasonic drives (e.g. SW-9582) to test transfer speeds with? I'd imagine Matsushita is self-sustaining enough to use their own chipset, pick-up heads and designs...