Recording Data on Magnetic Media

Magnetic recording is a way of saving sounds, images and data electronically by means of a magnetic pattern laid up on a suitable media. The first person to come up with this idea was a Danish gentleman called Waldemar Poulson, back in 1900; the media that he used or steel wire, and his recording device was named the telegraphone. The principle was taken up worldwide using all sorts of different media such as magnetic drums, discs, and tapes, and refinements allowed both greater accuracy and increased storage capabilities. New uses were found which include the storage of audio and video data, and ultimately high-volume data storage for computer systems.

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A later refinement is called magnetic bubble memory, which has two major benefits over earlier systems; firstly it is a much cheaper technique than earlier ones, and secondly it takes up far less space. The recording media is a sliver of garnet, which had been found to have many suitable properties but unfortunately in its natural state the mineral contains too many imperfections to be a practical solution, however methods were discovered to create the material synthetically, in order to overcome these limitations. The system is called bubble memory because data is stored in a binary form, in tiny area is called Bubbles and since each sliver can contain a very large number of these areas, and the slivers can be stacked, it is possible to store considerable quantities of data within a fairly small unit.

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