Why is the DVD burning so slow

Now the DVD burner has 16x and 18x, but the actual burn time is not as much as the nominal number of the ratio shortened. The original 8xDVD burner carved a disk about 8-9 minutes, and today's 16xDVD burner engraved the same disk also need about 6 minutes, why burn speed up one times, the time spent is not corresponding to shorten the half?

When burning, the disc is written into the data from inside to outside, just like mosquito coils. In this way, in the same speed, the disc rotates one lap, the inner circle through the area to be far less than the outer ring, natural burning speed is slower. Now the burner does not look nominal 16x, but at the start of the burning phase is not up to this speed. The burn speed is slowly raised to the nominal value only when the disc is gradually burned to the outer ring. In addition to burning the disc also has a sealing process, this link is basically affected by the speed of the burner is very small. So the nominal speed of the burner can only be used as a reference, in fact, burning a CD is only a few minutes, as long as not a large number of burning, can be ignored.

The bottleneck of disc burning

The speed of the DVD burner from 1x, 2x has been developed to 16x, we think the next generation will be 20x or 24x, but the market is a 18x, is the development of the burner hit the bottleneck?

Indeed, when the DVD burner speeds up to 16x, it is difficult to increase the speed further. Mainly because the speed of the burning disk has reached 10000 RPM, the speed continues to improve, the strong centrifugal force and the heat generated by the friction between the disc and the air will cause damage to the burning disk, you know now the mainstream hard drive is only 7200 rpm.

Therefore, in order to further enhance the burning speed, the corresponding burning disc quality must also be improved, while the burner to solve the high speed of the jitter, heat and noise problems. For now, 16x and 18x burners have been very mature and stable, and the higher-speed products will not go public until 1:30.