These are the ways in which a DVD could be written using this device. Some examples of possibilities on certain burners are Disk-at-Once, Sequential Write, and Random Access Write. Some DVD burners write the entire disk at once. Some are capable of writing data only in order on the disk, while others with Random Access capabilities can write to all different parts of the disk without having to go in order. "Recording DVD Modes" refers to which capabilities this device has.