Patent ID: 7515376

Claim:
A series of disk drives, each drive in the series being assembled from a predetermined set of components for a head disk assembly and for drive electronics wherein said components may fail to meet minimum standards of performance, said head disk assembly having a disk with a first magnetic surface and a first read/write transducer associated with said first magnetic surface, wherein in a first drive of said series there has been formed on said first magnetic surface a plurality of servo tracks having a track pitch and a plurality of data tracks having a track pitch different than the servo track pitch thereby defining a servo-to-data track pitch relationship; and wherein in a second drive of said series there has been formed on said first magnetic surface a plurality of servo tracks having a track pitch and a plurality of data tracks having a track pitch different than the servo track pitch thereby defining a servo-to-data track pitch relationship and wherein the servo-to-data track pitch relationship of said first magnetic surface of said second drive is different than the servo-to-data track pitch relationship of said first magnetic surface of said first drive of said series whereby said first disk drive and said second disk drive now have a maximized areal storage density and meet acceptable standards of performance.