Yes.I can confirm that a "SCSI something" type of error, in Brasero, is due to a ruined DVD you are trying to use.
It recently happened to me, also, with a DVD-RW, that started giving me such error, on two different computers, with two different versions of GNU/Linux, while another DVD-RW, that I have, continued to operate normally, on both computers.
So, I safely concluded that such DVD had reached the end of its life, and threw it away.
