The execution time can be twice as long from a DVD-R as from a glass mastered
disc with the same contetnts, so I assume it is slowed by unreported errors.
BUT - The glass mastered DVD-ROMs are always fine, as are most DVD-R DVD-ROM
Thats a really cool post there Bill.
i. The reason DVDInfoPro will not report parity errors on either the Sony or the NEC, is because NEITHER drive currently supports this capability in firmware. The NEC will be supporting it soon. As soon as you have the (non-publically available currently) firmware, DVDInfoPro will let you report parity errors using this hardware! Cool huh? As for the Sony...veeeery old hardware. We are working on getting this enabled, for other users as well! :-D
ii. As for the CRC errors, it really should run these tests. Something seems a little odd there! The CIRC error scanner should just work. What version of InfoPro are you running and how is the optical hardware connected to your system?
iii. The glass platter/dvd-r issue is an interesting one that does not really surprise me. Your work, I find, very interesting.
I will wager that the ability of a reading mechanism (PUH/OPU block) to read media is highly dependent upon the reflectivity and refraction coefficients of the material it is made of. Logically, a PUH/OPU cannot be optimally calibrated to read ALL kinds of reflectivity indexes perfectly. As a result, at an educated guess, this is why we sometimes see such a difference in readback performance!