Patent ID: 6714371
Filing Date: 2004-03-30
Classification: G11B

Abstract:
In a disk drive having a read/write head and a plurality of concentric data tracks on a storage surface of a rotating disk, each data track having data sectors and embedded servo sectors, a method for shock estimation and write termination control comprising steps for:positioning the head over a selected data track of the plurality of concentric data tracks for following the track during a data write operation; reading the track's embedded servo sectors to generate position error signal values; providing a write unsafe limit for terminating a data write operation if at least one position error signal value exceeds the write unsafe limit; providing a shock event limit; and if a current position error signal value is less than the write unsafe limit value, then: calculating a function value based on the current position error signal value and a previous position error signal value; terminating a data write operation if the calculated function value exceeds the shock event limit.