In musical and audio data storage, the first devices were also drums, which were popularized by Thomas Edison. These were replaced by vinyl recording disks called records?. From the 1950s through the 1980s, audio recordings were also done on magnetic tape media of several types. These were mostly replaced by compact disc technology, where the data is recorded in a digital format as optical? information. This compact disc technology has been widely accepted, and data storage, using writable compact disks or CD-R devices is very common.
For now see floppy disk or hard disk or compact disc.
Appropriate for this page would be things common to all disk based storage devices, that is a discussion of rotation (CLV, CAV). Low level formatting tracks, sector?s, cylinder?s, platter?s, heads. rotational delay, seek time.