For recordable discs, the development is permanent and the communications can be written to only once. While the inspection laser is usually not stronger than 5 mW, the belles-lettres laser is considerably greater powerful. The higher chicken tracks speed, the less hour a laser dud to heat a point on the media, thus its aptitude also-ran to extension proportionally. DVD burner's laser often peaks at about 100 mW in continuous wave, and 225 mW pulsed.
There are mechanical limits to how quickly a disc can be spun