Got two replies for Acard:
Yes, we known this performance issue with 116 series new drives.
Controller will cause buffer under run and take long time.
But copied disc no data no problem. (recommend set DVD Burn Speed to 4X)
We not maintain new firmware for ARS-2022D old model controller already.
If you need better performance, please try use 115 or ASUS, NEC series DVD
and the follow up:
We not found Pionner’s OEM model drives.
It cause by new model 116/117 writing behavior not same as old model
And ARS-2022D use old structure design can not support all new writers with
We confirmed ARS-2022D + Pioneer 116 performance is 7~8min. (ARS-2030LD 1-3
will drop to 4X)
Pioneer DVR-112/115 performance will be better. (6min)
But you still can test other brand DVD writers.
ASUS, NEC series performance better than Pioneer DVR-116/117.
The only thing left to try is to crossflash to another firmware. Is it possible to crossflash 116D to A16 or Buffalo or 116 or something else?