Patent ID: 8094015

Claim:
A method comprising: receiving a signal from one or more sensors on a hard disk, wherein the signal from the one or more sensors indicates a variation in a characteristic of the hard disk; determining a wavelet decomposition level based on the received signal from the one or more sensors on the hard disk; performing wavelet analysis on the received signal from the one or more sensors on the hard disk based, at least in part, on the determined wavelet decomposition level, wherein said performing the wavelet analysis on the received signal comprises, determining a first approximation signal and a first detail signal from the received signal, and performing wavelet analysis on the first approximation signal to generate a second approximation signal and a second detail signal; determining the presence of one or more spikes in the first and the second detail signals; determining that the received signal indicates anomalies corresponding to deformations on the hard disk based, at least in part, on the presence of the one or more spikes in the first and the second detail signals; and generating an alert indicating one or more mechanical defects on the hard disk.