Is burning a disc a one-time operation?

The disc burning can be one-time or repeated. Optical discs are divided into two types: disposable optical discs and rewritable optical discs; disposable optical discs can also be burned in multiple sections, that is, all the storage space can be burned in several times; and rewritable optical discs can be burned repeatedly, and software can be used after burning Erase data and use disc again. The theoretical number of rewritable discs can reach 1,000 times. However, due to external factors such as storage environment and wear and tear, the actual number of rewritable discs will not reach 1,000 times.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Disc burning can be one-time or repeated.

Optical discs are divided into two types: disposable optical discs and rewritable optical discs.

CD-ROM and DVD-R (or DVD R) marked on the disk are disposable discs that cannot be burned repeatedly and can only be burned once; however, It can also burn multiple sections, that is, it can burn all the storage space in several times. However, some CD-ROM drives cannot display all the content burned using this method, and can only see the last recorded content.

The discs marked CD-RW, DVD-RW (or DVD RW) are rewritable discs and can be burned repeatedly. The advantage of erasable optical discs over other optical discs is that you can use software to erase the data after burning and use the disc again. The theoretical erasing and writing times can reach 1,000 times, but due to external factors such as storage environment and wear and tear, the actual erasing and writing times will not reach 1,000 times.

The working principle of rewritable optical discs

The structure of this optical disc has six layers, and the data is recorded in the phase change Metal (hase-change metal alloy layer) is a highly reflective crystal structure. When burning data, CD-RW uses the highest power laser to heat the position where the data is written 1, melting the alloy material in a small area, and then condensing it. into an amorphous structure, making it unable to have good reflectivity as before. As for the restoration of the crystal structure, as long as a medium-power laser is used, enough temperature can be generated to restore the amorphous structure to a crystal structure using CD-R Disc burning.

The principle of disposable DVD

There is a special liquid in the middle of the two layers of discs that are bonded together. When the DVD disc's outer packaging is opened, this liquid will begin to work and gradually erode the metal coating on the surface of the disc. After the specified use time, the coating of the DVD is completely eroded, and the DVD will "end of life". This liquid is based on the juice of natural citrus fruits and will not harm the environment or human health.

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