Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data in specific format
Patent
1995-05-25
2000-02-08
Kim, W. C.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data in specific format
360 41, 360 47, G11B 509
Patent
active
060233842
ABSTRACT:
A magnetic disk drive includes redundant data written at a plurality of out of phase angular locations to reduce the latency and enhance performance during a read operation. The loss of recording capacity is reduced by increasing the data density to achieve the same soft error rate standard required for single recording. Dual recording also allows different recording codes to be used at the duplicated locations to thereby have the more highly stressed code words occur at different locations in the data to further reduce the possibility of an error. The redundant recording can be used in one portion of the media and normal recording used in another media portion to enable selection of the recording technique in accordance with the type of data being stored. The size of the normal and redundant recording portions can be controlled by the format operation and the user of the disk drive can intervene to designate the size of the redundant and normal media recording portions effected during the format operation.
REFERENCES:
patent: 2680239 (1954-06-01), Daniels et al.
patent: 3103650 (1963-09-01), Gehring, Jr. et al.
patent: 3729725 (1973-04-01), Denney et al
patent: 3883891 (1975-05-01), Thompson et al.
patent: 4146909 (1979-03-01), Beckenhauer et al.
patent: 4270154 (1981-05-01), Crawford
patent: 4484176 (1984-11-01), Fitzpatrick
patent: 4546342 (1985-10-01), Weaver et al.
patent: 4703371 (1987-10-01), Redmond et al.
patent: 4772963 (1988-09-01), Van Lahr et al.
patent: 4804959 (1989-02-01), Makunsi et al.
patent: 4814903 (1989-03-01), Kulakowski et al.
patent: 4882754 (1989-11-01), Weaver et al.
patent: 4986668 (1991-01-01), Fukushima et al.
patent: 5031218 (1991-07-01), Galand et al.
patent: 5210660 (1993-05-01), Hetzler
patent: 5257143 (1993-10-01), Fangenhpour
patent: 5418657 (1995-05-01), Machado et al.
patent: 5422761 (1995-06-01), Anderson et al.
"Synchronized Dual Copy for Latency and RPS Miss Penalty Reduction", Jul. 1988 Document No. AAA88A062573, Research Disclosure n291 Jul. 1988.
Spencer W. Ng, "Improving Disk Performance via Latency Reduction", IEEE Transactions on Computers, vol. 40, No. 1, Jan. 1991, pp. 22-30.
R. Baird et al., "Synchronous Pair Block Recording", IBM Technical Disclosure Bulletin, vol. 25, No. 4, Sep. 1982, pp. 2053-2056.
S. Lee et al., Half Latency Format for Hard Disk Drive, IBM Technical Disclosure Bulletin, vol. 34, No. 7A, Dec. 1991, pp. 423-425.
E. Melen, "Write-Read Chaining", IBM Technical Disclosure Bulletin, vol. 15, No. 5, Oct. 1972 pp. 1560-1562.
P.A. Franaszek et al., "Providing Extra-Surfaces to Decrease Write Commit Times Disk Subsystems", IBM Technical Disclosure Bulletin, vol. 29, No. 10, Mar. 1987, pp. 4509-4511 .
D. J. Winarski, Special Sector Size for Write-Once Disk Directories, IBM Technical Disclosure Bulletin, vol. 32, No. 9A, Feb. 1990, pp. 271-272.
S. W. Ng, "Latency Reduction for CD-Rom and CLV Disks", IBM Technical Disclosure Bulletin, vol. 34, No. 7B, Dec. 1991, pp. 19-20.
Y. Dishon, "Multiple Copy Disk Storage Device Using 180 .largecircle. Synchronization Control", IBM Technical Disclosure Bulletin, vol. 32, No. 8B, Jan. 1990, pp. 180-182.
G. G. Floryance, "Using Dual Actuator Shared Data Direct Access Storage Devices Drives in a Redundant Array", IBM Technical Disclosure Bulletin, vol. 33, No. 8, Jan. 1991, pp. 270-272.
M. F. Bond et al., "Selecting Mirrored Disk Unit for Read Operations", IBM Technical Disclosure Bulletin, vol. 33, No. 4, Sep. 1990, pp. 33-34.
Patent Abstracts of Japan, No. 133, p-1436, Jun. 25, 1992, (JP-A-4-178975).
Patent Abstracts of Japan, No. 98, p-924, May 26, 1989, (JP-A-1-134760).
Patent Abstracts of Japan, No. 106, p-358, Jan. 12, 1985, (JP-A-60-5476).
Patent Abstracts of Japan, No. 49, p-1468, Aug. 31, 1992, (JP-A-4-243060).
Patent Abstracts of Japan, No. 148, p-49, Nov. 28, 1980, (JP-A-55-153183).
Patent Abstracts of Japan, No. 146, p-370, Feb. 28, 1985, (JP-A-60-38764).
English Translation of Japanese Patent Application No. 55-153183, Nov. 28, 1980.
English Translation of Japanese Patent Application No. 1-134760, May 26, 1989.
Anderson Nathaniel Carl
Hajji Mohammed Amine
Ottesen Hal Hjalmar
Ross Michael Joseph
Bussan Matthew J.
International Business Machines - Corporation
Kim W. C.
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