Dynamic magnetic information storage or retrieval – Head – Core
Patent
1993-08-02
1995-10-31
Robertson, David L.
Dynamic magnetic information storage or retrieval
Head
Core
395404, 360 7804, G06F 1116, G06F 1300
Patent
active
054637589
ABSTRACT:
Disclosed is a mass storage system for a data processing system providing data redundancy by mirroring files and arranging redundant record copies in a way to reduce access time and energy consumption over a pure mirrored system. A plurality of mirrored disk drives for long term storage of duplicate copies of the records are utilized. The logical address for each record is equated to relatively displaced radial locations among the mirrored disk drives. A controller for the mirrored disk drives maintains a record of correspondence between track physical addresses and logical addresses, and the current location for the transducer positioning arm for each disk drive. Upon a read access to a record, the arm closest, in terms of track displacement, from the track where a record copy is kept is used to access the record copy. Application of the method to zone bit recording system is also discussed.
REFERENCES:
patent: 4138741 (1979-02-01), Hedlund et al.
patent: 4383279 (1983-05-01), Kenney, II
patent: 4796098 (1989-01-01), Giddings
patent: 4920528 (1990-04-01), Sakamoto et al.
patent: 5083229 (1992-01-01), Frey, Jr.
patent: 5390313 (1995-02-01), Yanai et al.
"Skewed Format Method For Personal Computer Hard Disks To Reduce Rotational Latency Delays", IBM Technical Disclosure Bulletin, vol. 29, No. 4, New York, U.S., Sep., 1986, pp. 1867-1868.
"Latency Reduction For CD-ROM And CLV Disks", IBM Technical Disclosure Bulletin, vol. 34, No. 7B, New York, U.S., Dec., 1991, pp. 19-20.
Database WPIL, No. 89-030 155, Derwent Publications Ltd., London; & RD-A-296047 (Anonymous), Oct. 12, 1988. *Abstract*.
Dillon Andrew J.
International Business Machines - Corporation
Robertson David L.
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