Method for monitoring the performance of the head-disk-interface

Details Method for monitoring the performance of the head-disk-interface Method for monitoring the performance of the head-disk-interface

1987-03-31

1989-01-03

Eisenzopf, Reinhard J.

Electricity: measuring and testing

A material property using electrostatic phenomenon

Frictionally induced

360103, G01N 2760

Patent

active

047959819

ABSTRACT:
A method and apparatus is described by which, in magnetic disk storage systems where a triboelectric current can be observed to flow between slider and disk surface, a saving signal can be generated by which a saving action can be initiated to save the data on the storage system before they are lost irreversibly. The triboelectric current is monitored and checked during start phase, and if certain values and conditions are not fulfilled, the saving action is initiatable by the TRIC signal, which is generated by an evaluation and analyzer circuit upon the occurrence of certain events such as the triboelectric current not reaching at least a predetermined threshold value during start phase, the triboelectric current becoming negative, or the triboelectric current reaching a non-zero value when the magnetic disk storage system reaches operational speed.

REFERENCES:
patent: 3329943 (1967-07-01), Tanguy, Jr. et al.
patent: 3560946 (1971-02-01), Ehalt et al.
patent: 3634835 (1972-01-01), Houston
patent: 4479090 (1984-10-01), Frater et al.
patent: 4532802 (1985-08-01), Yeack-Scranton et al.
patent: 4635139 (1987-01-01), Nguyen et al.

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