Optical Storage
Today the chief alternative to magnetic media in mass storage system is optical technology. Cheap and easy duplication has made computer optical disc storage an ideal distribution medium. Its versatility (the same basic technology stores data, sound, and video) came about because all engineers eagerly search for big, cheap storage. Both the Compact Disc (CD) and Digital Versatile Disc (DVD) have both of those virtues by design. In addition, because the discs both systems use for storage are removable and interchangeable, CD and DVD systems can serve as both online and offline storage.
Engineers made optical media into true mass storage systems by adding writing capabilities to both the CD and DVD designs. By altering the materials ...
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