Disc drive failure prediction
First Claim
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1. A method of predicting failure of a disc drive during operation of the disc drive comprising steps of:
- maintaining a write fault count corresponding to write faults encountered during write operations to a disc;
comparing the write fault count to a write fault count threshold;
incrementing a write fault history count when the write fault count reaches the write fault count threshold;
obtaining a frequency domain representation of a position error signal (PES) of a head of the disc drive; and
predicting failure of the disc drive based on the write fault history count and the frequency domain representation of the PES.
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Abstract
In a method for predicting failure of a disc drive during operation of the disc drive, a write fault count is maintained that corresponds to write faults encountered during write operations to a disc of the disc drive. Additionally, a frequency domain representation of a position error signal of a head of the disc drive is obtained. Finally, failure of the disc drive is predicted based on the write fault count and the frequency domain representation of the position error signal. Another aspect of the present invention relates to a disc drive that is capable of performing the above-described method.
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Citations
20 Claims
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1. A method of predicting failure of a disc drive during operation of the disc drive comprising steps of:
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maintaining a write fault count corresponding to write faults encountered during write operations to a disc; comparing the write fault count to a write fault count threshold; incrementing a write fault history count when the write fault count reaches the write fault count threshold; obtaining a frequency domain representation of a position error signal (PES) of a head of the disc drive; and predicting failure of the disc drive based on the write fault history count and the frequency domain representation of the PES. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A disc drive configured to perform predictive failure analysis comprising:
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a microprocessor; a memory accessible by the microprocessor including a write fault count, a write fault count threshold and a write fault history count; and a failure analysis module including instructions executable by the microprocessor to perform steps of; maintaining the write fault count corresponding to write faults encountered during write operations to a disc; incrementing the write fault history count when the write fault count reaches the write fault count threshold; obtaining a frequency domain representation of a position error signal (PES) of a head of the disc drive; and predicting failure of the disc drive based on the frequency domain representation of the PES and the write fault history count. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of predicting failure of a disc drive during operation of the disc drive comprising steps of:
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a) maintaining a write fault count corresponding to write faults encountered during write operations to a disc; b) comparing the write fault count to a write fault count threshold; c) incrementing a write fault history count when the write fault count reaches the write fault count threshold in the comparing step b); d) comparing the write fault history count to a write fault history threshold; and e) obtaining a frequency domain representation of a position error signal (PES) of a head of the disc drive; f) comparing a PES amplitude of the frequency domain representation of the PES at a predetermined frequency to a PES amplitude threshold; and g) predicting failure of the disc drive based on the comparing steps d) and f). - View Dependent Claims (19, 20)
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Specification