I’ve done a few scans on DVDs burned since I upgraded to the 1.06 firmware. I then compared then to scans burned with the 1.05 firmware (but read on the same drive upgraded to 1.06). My conclusion is that although Plextor seems to have improved the burn quality for 8X and 16X burns (my observation also), they have done it at the expense of quality for low-speed (4X and 6X CLV) burns. I’ve checked a few discs burned at these speeds with 1.05 firmware and a few with 1.06 firmware, so this observation is not on just two samples.
In the attached scans, both are RICOHJPNR01 media (Memorex branded) burned at 6X CLV. ISO images were made with ImgTool Classic and burned with DVD Decrypter.
The first scan (with total PIE of 34477) was burned on my drive with 1.05 firmware, and read back in the same drive with 1.06 firmware.
The other scan (total PIE of 154271) was burned on the same drive with 1.06 firmware and read back with the same.
As you can see the average and total numbers of PIE errors has more than quadrupled, and the peak has doubled!
Why cannot Plextor improve high-speed writing quality without damaging the writing quality at lower CLV speeds, which is what I prefer to burn DVD-VIDEO at?