Method for measuring offset amount between heads in a...

Details Method for measuring offset amount between heads in a... Method for measuring offset amount between heads in a...

2011-03-22

2011-03-22

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

Reexamination Certificate

active

07911723

ABSTRACT:
An offset amount between heads is calculated by positioning a head in a designated track under an ON track servo control, obliquely writing test data by moving the head in a radial direction of the magnetic recording medium at a designated moving speed K to cross the designated track and at least one track adjacent to the designated track according to a write start signal, reading the oblique test data by the read head from the adjacent track under the ON track servo control, detecting a peak position of a read voltage by using a read voltage characteristics of the read signal in the adjacent track and calculating the offset amount between the heads by detecting a scan time up to the peak position of the read voltage.

REFERENCES:
patent: 6456451 (2002-09-01), Asano et al.
patent: 2009/0310249 (2009-12-01), Michinaga
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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