Mass Storage Device
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Dorrell, CE: AUTHOR [+2]
AbstractLow-cost, rapid-access, mass storage devices with good Volumetric efficiencies can enhance data-processing system operations. Multiple transducing stations, together with parallel accessing of a plurality of record members, improve accessibility to stored informational items (shorter access time plus higher throughput).
Mass Storage Device
Low-cost, rapid-access, mass storage devices with good Volumetric efficiencies can enhance data-processing system operations. Multiple transducing stations, together with parallel accessing of a plurality of record members, improve accessibility to stored informational items (shorter access time plus higher throughput).
Continuously rotating annular storage array 10 contains a plurality of arcuate
media storing compartments 11, each for containing one or more media strips
12. Suitable detenting is provided at the radial inward end portion 13 of each storage compartment. When a given media member 12 is to be moved to a transducing position, the detent mechanism for the corresponding storage compartment 11 is released. Air pressure is introduced in the hollow cylindrical core of the annular storage array, forcing the selected media 12 to a radial outward position within transducing race 14, as shown for media member 12A. The inner end of member 12A may be attached at the open end of storage compartment 11.
As soon as this end is secured, the inner core space of storage array 10 can be evacuated for holding the extended media against the outer periphery of the continuously rotating array. In the alternative, positive pressure can be maintained for forcing member 12A to ride along the inner periphery of outer shroud 15 of the storage assembly. A number of such media members 12A can be simultaneously placed within race 14, for multiple-concurrent transducing operations. By limiting the length of the media member to less than the spacing between adjacent openings of the storage compartments, contention is obviated with multiple media members simultaneously available in race 14.
Improved access to the information in storage array 10 is enhanced, by providing a plurality of circumferentially spaced transducing stations. In addition to providing parallel access to a plurality of radially extended media members, data revolving operations can be provided. Signals from a given media member are read by a first transducing station,; signal processing operations are then performed on the transduced signals, and resultant signals are then supplied to a downstream transducing station for record the result signals on the same record member. Conversely, data written at one station may be read downstream (optionally processed) and rewritten on a different record member upstream, to enable data to reappear at the original sensing transducer in less than one revolution or latency period selectively in processed form.
Media 12A can be returned to its storage compartment 11 by several means. For example, axially movable return ramp can be spaced from the surfaces of annular storage array 10. When the media members are to be returned, the return ramp is pressed against the axial end surfaces for engaging axially outwardly extending detents or pins 30 on the leading edge of members 12A, causing it to return the media into the storage co...