Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data verification
Patent
1989-10-31
1992-06-09
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data verification
360 31, G11B 509
Patent
active
051212633
ABSTRACT:
In a disk drive providing amplitude sampling data detection, the amplitude of an analog read back signal is sampled at data clock intervals. The resulting analog values are converted to digital equivalent values. The digital equivalent values are each compared to an expected digital values that is representative of the data that was originally recorded on the disk, to thereby generate a different value. The resulting collection of difference values are magnitude segregated, and then stored in a plurality of registers, for later use in providing a histogram that is a measure of the disk drive's read error rate.
REFERENCES:
patent: 4394695 (1988-07-01), Mahon
patent: 4504872 (1985-03-01), Peterson
patent: 4578721 (1986-03-01), Brannan, Jr.
patent: 4970609 (1990-11-01), Cunningham et al.
Kerwin Gregory J.
Rae James W.
International Business Machines - Corporation
Kraynak, Jr. Joseph P.
Lahtinen Robert W.
Psitos Aristotelis
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