Thank you for your answer LIGHTNING, but if you had read the log I posted, you would realize that I have already tried all the speed that the disc supports, 2.4x, 4x, 6x, 8x, and the best result I 've got the speed set to 8x, while if imposed for use with the 'AWS, then the disc and 8x and 8x for the driver, I don't have the same result but worse.
I read all the guides and tests made to the disks, perhaps I don't setting good to write a matroska file to 8 GB ?
What would be the best setting to do this?
Thanks.