I got a LG GSA-4163B with A105, and after zillions of tests and coaster, i found out a good suplier with good medias, and those were IMATION DVD-R. They are original Imation, because the store purchases directly from Imation here at my country.
I have burned over 50 of these medias succesfully, never lost a single one and never got any kind of error when testing.
Last week, i purchased a few more blank Imation medias and NONE of them worked. Nero or DVD Decrypter pop up an error message right after LEAD IN start, and abort operation.
I tested over 15 medias, and same problem.
Today, just for the sake of it, i tried burning at 8x (i ALWAYS burn at lowest speed possible) and to my surprise, it worked like a charm!! It actually burned at 6X, but runned some tests afterwards and got no error on ScanDisk and Transfer Rate test.
So I ask: what could be the problem?? My drive or the medias changed something on manufacture process?? The ID CODE is exactly the same on all the old and new medias.
Also notice that my drive burned Maxwell, Nestar and other poor medias at 4x normally.