This only took 30 seconds to run for an entire ubuntu disk. Seems a little fast... I'll let you know if this disk is corrupted or if it worked.
cdrecord -v -tao speed=40 dev=/dev/cdrom driveropts=burnfree -eject -data file.iso
btw, /dev/cdrom is probably not what you literally want:
$ ls /dev | grep cd
so what I used was /dev/cdrw1
and file.iso should be replaced with the actual name of the file that you want to burn :D.
No errors were found when I checked the disk integrity.
http://unetbootin.sourceforge.net/ is the only way to go.