Method for measuring write/read width of a composite...

Details Method for measuring write/read width of a composite... Method for measuring write/read width of a composite...

2009-07-21

2011-11-08

Negron, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S075000

Reexamination Certificate

active

08054567

ABSTRACT:
Test data is written in tracks of a discrete track medium by making the tracks eccentric by accessing a plurality of tracks by forcibly making a composite magnetic head eccentric under an ON track servo control. The test data written in the tracks which are pseudo-eccentric are written in the tracks with the original write sensitive width of a write head. It is possible to obtain a read characteristics profile having a peak by tracing and reading the test data while moving the composite magnetic head (read head) which is forcibly made eccentric in a radial direction.

REFERENCES:
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patent: 2008/0198501 (2008-08-01), Kawabe
patent: 2009/0323209 (2009-12-01), Kiyono
patent: 2000-231707 (2000-08-01), None
patent: 2007-012119 (2007-01-01), None
patent: 2007-149155 (2007-06-01), None

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