A data recording disk file is provided with a fixed block architecture sector format that eliminates the ID region. The servo region contains sector identification information in the form of a start-of-track indicating mark recorded in a selected sector of each track and a start-of-sector indicating...http://www.google.com/patents/US5438559?utm_source=gb-gplus-sharePatent US5438559 - Method for locating physical sectors in a fixed block architecture embedded servo disk file #14
