[-dvd-compat] will still allow you to pad DVD+R, DVD-R Incremental, even DVD-R DL recordings, not to mention rewritables..Yeah. That's why this development glitch could stay undetected for quite a while. It is harmless if the image comes from a regular disk file, i understand from reading your builtin_dd().
Correct.
There is also possibility that some/their units require layer break to be set but stranger things were observed...Hm. I shall prepare libburn for explicite setting of that address. For now i left it out because the specs do not call it mandatory by any means and because i do not fully understand the consequences. (E.g. may i set the L0 capacity to hundred MB and still write the full 4+ GB on L1 ?
No. How much you can write to L1 will always be less or equal to L0 capacity.
Do i need to call RESERVE TRACK ? ...)
No. I.e. not according to specification. A.