Method of detecting thermal asperity error of MR head and magnet

Details Method of detecting thermal asperity error of MR head and magnet Method of detecting thermal asperity error of MR head and magnet

1996-12-20

1998-10-13

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 25, G11B 540, G11B 5455

Patent

active

058221395

ABSTRACT:
The present invention resides, in a magnetic disk certifier for detecting one of a spike error and a positive modulation error on the basis of a read signal obtained by reading out by an MR head a test data written on a track of a magnetic disk as a first error of said magnetic disk and detecting one of a missing error and a negative modulation error as a second error, a method and apparatus for detecting a thermal asperity error of said MR head, by of detecting the first error and the second error in positions on said track, the positions having a recording length of a plurality of bits of the test data and judging a thermal asperity error when the first error and the second error are detected in one and the same position of the track.

REFERENCES:
patent: 4929894 (1990-05-01), Monett
patent: 4949036 (1990-08-01), Bezingue et al.
patent: 5121057 (1992-06-01), Huber et al.
patent: 5247254 (1993-09-01), Huber et al.

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