Re: (2nd time)unable to burn disk in brasero disk burner (every-time it spoils the disk )
F11's Brasero has had some serious bugs (it started out fine, but
updates made it worse). You could try updating to the newest Brasero
in Rawhide.
"yum update --enablerepo=rawhide brasero"
That might work. You could also try running F12, which uses the
newest version of Brasero as well and has fixed several bugs.