Patent ID: 8711499

Claim:
A method for measuring performance associated with adjacent track interference on a magnetic disk media for a storage device, the method comprising: iteratively writing data to a target track for each of a plurality of n frequencies, wherein iteratively writing data for an ith iteration comprises writing an nth sector of the target track on the disk with an nth pattern at an nth frequency, wherein the ith is an iteration count extending from 1 to n, wherein n is a positive integer; measuring a first signal amplitude and a first noise for each of the n sectors on the target track; writing an aggressor track pattern proximate the target track; measuring a second signal amplitude and a second noise for each of the n sectors on the target track; calculating a weighted sum for each of the first and second signal amplitude measurements for each of the plurality of n frequencies; calculating a weighted sum for each of the first and second noise measurements for each of the plurality of n frequencies; repeating the writing the aggressor track pattern proximate the target track for a preselected number of times to generate cumulative measurements; repeating the measuring the second signal amplitude and the second noise for each of the n sectors on the target track; and repeating the calculating the weighted sum for each of the first and second signal amplitude measurements and the calculating the weighted sum for each of the first and second noise measurements using the cumulative measurements to generate adjacent track interference performance information.