>here's the output from cdrecord when I attempt to do a dummy burn <snip> >does this mean it would not write properly or does it mean it wrote ok >but providing me some warnings to take into consideration as in use at >your own risk etc. This means that the disc would write OK but it would have trouble fixating the disc so you'd end up with a coaster probably. I did manage to overburn the knoppix image with a command like: cdrecord -v dev=1,0,0 -dao driveropts=burnfree -overburn -data knoppix.iso You'll have to experiment with the supported modes of your drive to see which one works correctly. Mine only supports overburning in dao mode but yours may be different. Gotta love the -dummy option. If your burner doesn't support burnfree you're probably not going to be able to overburn the knoppix image because with my writer at least it used burnfree about 4 times or so.