What Does CD 16X Mean?

CD speed ratings indicate how fast the disc can be accessed.

Ever-changing technology can cause confusion. In the computer technology world, that is especially prevalent. Several types of compact discs are available on the market, with different features and speeds.

Disc Type

There are three types of compact discs (CD), which are identified on the disc label. A disc with only the letters "CD" is readable only. A disc with "CD-R" or "CD-RW" can be read and written to with the proper kind of drive.

Disc Speed

The speed of the CD is identified by a number followed by an "X." In theory, a 16X disc can be read 16 times faster than a generation 1 CD drive, which can be read at 150KB per second. In reality, the working of the drive affects the actual speed, and so it will end up being less than the anticipated 2400KB per second rating.

Maximum Speed Rating

Compact discs are rated on their maximum speed rating. This speed is only applicable to the reading of the outermost edge of the disc. The speed for the disc generally decreases as it is read toward the center of the disc.

References

• PC Guide: Rated "X" Speed
• Sony: What Is the Recording Speed of a CD-R
• PC Guide: Internal and External Transfer Rates