Go to
WWW.ELBY.ORG, click on SUPPORTED CD-WRITERS in the left menu, search for the cd-writer you have/want, look at CORRECT EFM-ENCODING...
one black sheep: This cd-writer isn't able to make perfect Safedisc2 backups
one yellow/white sheep: This cd-writer is able to make almost always perfect Safedisc2 backups
two yellow/white sheeps: This burner is able to make always perfect Safedisc2 backups