Method and apparatus for determining the error rate of magnetic

Details Method and apparatus for determining the error rate of magnetic Method and apparatus for determining the error rate of magnetic

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.

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