Hard disc track defect detecting apparatus

Details Hard disc track defect detecting apparatus Hard disc track defect detecting apparatus

1991-04-29

1994-01-18

Mis, David

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

324212, 369 53, G11B 2736, G11B 509

Patent

active

052803953

ABSTRACT:
An apparatus for detecting defects in a processing track on a hard disc uses an average or mean average level value as a reference value, in which an arithmetic means computes the average or mean average level value based on an average level value (Track Average Amplitude or TAA) for a plurality of tracks prior to the processing track which is stored in a memory means. The apparatus enables obtaining the reference value with less dispersion, which gives even and stable detected results of any defect in each track on the hard disc, and enables improvement in the efficiency of the throughput.

REFERENCES:
patent: 4949036 (1990-08-01), Bezinque et al.

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