Umount your device first, for example,
umount /media/Ubuntu\ 8.04.1\ amd64/
Now cdrecord is replaced with
wodim -scanbus
scsibus1:
1,0,0 100) 'HL-DT-ST' 'DVDRRW GSA-H30L ' 'S856' Removable CD-ROM
1,1,0 101) *
1,2,0 102) *
1,3,0 103) *
1,4,0 104) *
1,5,0 105) *
1,6,0 106) *
1,7,0 107) *
wodim --devices
wodim: Overview of accessible drives (1 found) :
-------------------------------------------------------------------------
0 dev='/dev/scd0' rwrw-- : 'HL-DT-ST' 'DVDRRW GSA-H30L'
-------------------------------------------------------------------------
wodim --dev=/dev/scd0 --blank=fast
wodim -v -eject speed=4 --dev=/dev/scd0 debian-testing-i386-CD-1.iso