They had a close look at the 16x and DL media. All drives burned the Verbatim DL media well (LG, Sony and Toshiba tried too hard and should be restriected to 2.4x rather than 4x) but most had problems with Ricoh.
The media is manufacture using the "inverse stack" method in which 2 halves are glued together. This supposedly reduces productions costs but requires that the halves be positioned very precisely for gluing. The optical properties differ from the Verbatim media (2P method), so that separate strategies are required in the firmware. Very few drives can handle them at present:
- BenQ and MSI abort the burn after the first layer
- Sony and Waitec completed the burn, but the second layer wasn't readable
- LG, TDK and Toshiba had much higher error rates on layer 2
- Plextor, Ricoh and Samsung were OK.
cant remember where i read from ....