Magnetic recording head slider with piezoelectric sensor for mea

Details Magnetic recording head slider with piezoelectric sensor for mea Magnetic recording head slider with piezoelectric sensor for mea

1997-11-12

2000-04-04

Kim, W. Chris

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 53, 360122, G11B 2736, G11B 509, G11B 5187

Patent

active

060468718

ABSTRACT:
A magnetic recording head for use in a disc drive system including a rotating disc has a slider body and a transducer on the slider body for reading and/or writing data from and/or to the disc. A piezoelectric sensor is provided on the slider body and produces a signal representing a level of interference between the slider body and the rotating disc. A method of predicting a head crash includes establishing a nominal level of interference between the magnetic recording head and the rotating disc and establishing a threshold interference level difference. The level of interference between the magnetic recording head and the rotating disc represented by the signal provided by the piezoelectric sensor is monitored during operation of the disc drive system. A predicted head crash is indicated when the level of interference between the magnetic recording head and the rotating disc is different from the nominal level of interference by more than the threshold.

REFERENCES:
patent: 4532802 (1985-08-01), Yeack-Scranton et al.
patent: 5325244 (1994-06-01), Takano et al.
patent: 5831781 (1998-11-01), Okamura
patent: 5872311 (1999-02-01), Schaenzer et al.

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