Christian, I feel that I have to apologize for Joerg's rude behavior.
Cdrecord will tell the drive to do laser power calibrationcdrecord does not do that to DVD+ media.Wrong: cdrecord of course does a power calibration for DVD+LOCAL BOOL...Interesting that you seem to have time to write this but to not like to support mkisofs.If you really have problems with mkisofs, please make reports in a way that allows to fix them.
Joerg, if you want to make personal remark, do it in proper context, or at least have decency to omit originator from explicit Cc: list. It's indeed nothing but rude to flip conversation like this, as if person just ceased to exist. A.