Method and apparatus for in-situ detection of data storage syste

Details Method and apparatus for in-situ detection of data storage syste Method and apparatus for in-situ detection of data storage syste

1994-12-27

1997-03-18

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Miscellaneous

360 7706, 369 58, G11B 3310

Patent

active

056128452

ABSTRACT:
A method and apparatus for detecting degradation in data storage system spindle motor performance is disclosed. A read/write transducer is oriented over a centerline location of a test track on the data storage disk. A data pattern is read from the test track centerline location and the amplitude of the on-track readback signal is determined. The transducer is oriented over a test track location off-set from the centerline location, and the data pattern is read. The amplitude of the off-track readback signal is determined. A deviation of a predetermined magnitude between the on-track and off-track readback signal amplitudes preferably results in the production of a warn signal indicative of degraded spindle motor performance. The off-track readback signal amplitude may alternatively be compared to a predetermined on-track readback signal amplitude stored in the data storage system.

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