Rotating storage device track format emulation

Disclosed is a method for recording a record that emulates a first recording format, which includes a track reference point, such as an index field, used for determining a position of a record on a track according to the first recording format, on a moving storage device operating according to a second recording format which also includes a track reference point. The invention comprises the steps, responsive to location information generated according to the first recording formats, of: (1) determining an original angular position of a record according to the first recording format; (2) calculating in response to the original angular position and a parameter a preferred angular position for the record according to the second recording format; (3) determining an actual angular position of the record recorded according to the second recording format; and (4) recording an extension of the record to compensate for the difference between the preferred angular position and the actual angular position.