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FASTRAND was a magnetic drum mass storage system built by Sperry Rand Corporation (later Sperry Univac) for their UNIVAC 1100 series and 418/490/494 series computers. A FASTRAND subsystem consisted of one or two Control Units and up to eight FASTRAND units.
The most significant of these was the FASTRAND 1 Drum Storage Unit. This physically large device had two contra-rotating drums mounted horizontally, one above the other in a pressurized cabinet. Read-write heads were mounted on a horizontally moving beam between the drums, driven by a voice coil servo external to the pressurized cabinet.
A 200-litre drum (known as a 55-gallon drum in the United States and a 44-gallon drum in the United Kingdom and the rest of the world) is a cylindrical container with a nominal capacity of 200 litres (55 US or 44 imp gal). The exact capacity varies by manufacturer, purpose, or other factors.
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The most common IBC size 1000L fits on a single pallet of similar dimensions to pallets which hold 4 drums (200L), providing an extra 120L of product in the IBC over drum storage, a 12% increase for the same storage footprint. Additionally, IBCs can be manufactured to a customer's exact requirements in terms of capacity, dimensions, and material.
The IBM 2301 is a magnetic drum storage device introduced in the late 1960s to "provide large capacity, direct access storage for IBM System/360 Models 65, 67, 75, or 85." The vertically mounted drum rotates at around 3,500 revolutions per minute, and has a head-per-track access mechanism and a capacity of 4 MB.
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