Method and apparatus for detecting shock-resistance performance

Details Method and apparatus for detecting shock-resistance performance Method and apparatus for detecting shock-resistance performance

2007-05-01

2007-05-01

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S075000

Reexamination Certificate

active

11283790

ABSTRACT:
A method for detecting a shock resistance performance of a magnetic head support member in a magnetic disk drive apparatus includes a step of loading a magnetic head supported by the magnetic head support member above a magnetic disk on which servo information have been preliminarily recorded, a step of measuring off-track positions of the magnetic head and reproduced outputs OUTNOIMof the magnetic head at the respective off-track positions when no shock is applied, a step of storing the measured off-track positions and the measured reproduced outputs OUTNOIMat the respective off-track positions, a step of measuring off-track positions of the magnetic head and reproduced outputs OUTIMof the magnetic head when a shock is applied, and a step of obtaining a change in flying height of the magnetic head from the measured reproduced output OUTIMof the magnetic head when the shock is applied and from the stored reproduced output OUTNOIMof the magnetic head when no shock is applied depending upon the measured off-track position of the magnetic head when the shock is applied.

REFERENCES:
patent: 2006/0044658 (2006-03-01), Ma
patent: 11-203637 (1999-07-01), None

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