Predictive failure detection for data storage systems

Details Predictive failure detection for data storage systems Predictive failure detection for data storage systems

1996-02-05

1999-03-30

Chung, Phung M.

Excavating

371 211, G06F 1100

Patent

active

058897844

ABSTRACT:
A method of predictive failure detection for a data storage system comprises (a) determining a first mean squared error (MSE) value for a read operation wherein the MSE value is indicative of a signal to noise ratio of the read operation, (b) determining a second MSE value for a read operation, and (c) comparing the first and second MSE values wherein a difference in the MSE values indicates a change in the data storage system. The MSE values are directly related to the distance between the storage medium and the read head element used in the read operation. A significant change in MSE values or a trend of increasing MSE values over time indicates a probable impending failure of the data storage system.

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Eureopean Search Report.
P.A. Ziperovich et al; CMOS Implementation of A Viterbi Detector for Hard Disk Drives; 05/12/93; pp. 10.3.1-10.3.4.

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