Drum memory was a magnetic knowledge storage machine invented by Gustav Tauschek in 1932 in Austria. Drums have been extensively used within the 1950s and into the 1960s as computer memory. Many early computers, called drum computers or drum machines, used drum memory as the principle working memory of the pc. Some drums have been additionally used as secondary storage as for example numerous IBM drum storage drives and the UNIVAC FASTRAND collection of drums. Drums were displaced as major computer memory by magnetic core memory, which supplied a better balance of measurement, speed, cost, reliability and potential for additional enhancements. Drums were then changed by arduous disk drives for secondary storage, which have been each less expensive and offered denser storage. A drum memory or drum storage unit contained a large steel cylinder, coated on the surface surface with a ferromagnetic recording materials. It could possibly be thought of the precursor to the laborious disk drive (HDD), but in the form of a drum (cylinder) slightly than a flat disk.

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