Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism
Patent
1981-08-25
1983-12-20
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
360 22, 360 48, 360 78, G11B 1902, G11B 2108
Patent
active
044221100
ABSTRACT:
Data representations are translated on a rotating disc utilizing multiple transducers at different radial positions. The disc is logically formatted into selected concentric bands. Within each band data representations are translated alternately in a repetitive sequence among a selected number of transducers characteristic of the particular band. By appropriately selecting band format parameters and increasing the characteristic number of transducers as a function of decreasing band radial position the track data density may be maintained within selected limits.
REFERENCES:
patent: 3831191 (1974-08-01), Gold
patent: 4001883 (1977-01-01), Strout et al.
patent: 4005483 (1977-01-01), Kuwano
patent: 4152695 (1979-05-01), Democrate et al.
patent: 4229808 (1980-10-01), Hui
patent: 4357635 (1982-11-01), Hasegawa
H. J. McLaughlin, Disc File Memories, Instruments and Control Systems, Nov. 1961, pp. 2063-2068.
Eddleman Alfred H.
Hewlett--Packard Company
LaRiviere F. D.
MacAllister William H.
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