Method of determining optimal write current parameters of...

Details Method of determining optimal write current parameters of... Method of determining optimal write current parameters of...

2007-04-17

2009-11-17

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

Reexamination Certificate

active

07619842

ABSTRACT:
Optimal write current of a data storage device is determined by writing test data with an initial write condition and evaluating a performance related to the pole tip protrusion (PTP) of a magnetic head. A PTP control duration is determined as a duration between where the test data is initially written and where a performance evaluation value begins to satisfy a threshold criterion. An overshoot value of a PTP control signal that determines an overshoot amplitude of a write current and a PTP control duration are determined by for writing subsequent data such that PTP-related data errors are substantially constant regardless of write time.

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