Patent ID: 7602577

Claim:
A disk drive detection system for detecting rapid off track events occurring in a disk drive, said system comprising: an actuator assembly including a microactuator, said actuator assembly being movable with respect to a disk of the disk drive for writing data to and reading data from respective tracks on the disk, said microactuator including at least one piezoelectric element producing a voltage signal in response to a rapid off track event; a detection circuit for detecting an off track event, said detection circuit analyzing the voltage signal produced from said piezoelectric element and comprising: (i) a demodulator for processing the voltage signal produced by said piezoelectric element, (ii) a high frequency band pass filter, (iii) a low frequency band pass filter, said filters for isolating signal frequencies indicative of a rapid off track event, and (iv) at least one threshold detector for comparing said signal frequencies to a threshold for determining whether a rapid off track event has occurred; and means for remediating an error condition caused by the rapid off track event, said means for remediating including at least one of a software or firmware application incorporated in said disk drive wherein a drive mode of said disk drive is analyzed for read/write errors caused by said rapid off track event.