Hi, > I did another test using system rescue cd. While it gives me the same error > when I run dvd+rw-format, I note that mkudffs complains about multiple > extents. I don't know why it gives a different message under system rescue > cd than under Debian/Wheezy but I thought it might be a clue as to what the > problem is. What do you get from a plain write attempt: dd if=/dev/zero of=/dev/sr0 bs=2048 count=1 Have a nice day :) Thomas