it's not possible to make a boot disk during the istallation process, because it tries to create it on /dev/fd*, while the superdrive is an E-ide or parallel (or scsii??) drive! After the istallation, the system reboot, so if you haven't a secondary access to your linux box, you cannot access it by a ls 120!
*** This bug has been marked as a duplicate of 8056 ***
*** Bug 80420 has been marked as a duplicate of this bug. ***