I have owned a pioneer A09 for quite a while. Until a few weeks ago, I had to update the firmware to 1.58 in order to write to -DL media. Afterwards, I was able to burn 2 single layered DVD-Rs with out any problems.
A few days ago, I installed the latest version of alcohol to burn a mdf image onto -DL media. That burn failed. Then subsequent burns to single layer DVD-Rs keep checking out as bad.
Nero says burns are completed successfully, but when doing a check using CDCheck, there are often files that can’t be read.
I am using RiTek DL, -R media. Also using some RiTek -RWs which has worked great in the past.