APPARATUS AND METHOD FOR SERVO SYSTEM CALIBRATION OF A REMOVABLE DISKETTE MEDIUM

摘要

An ultra-high capacity removable media diskette data storage system includes a floppy-type disk drive (10) having a flexible media disk (40) rotatable at a controlled angular velocity which includes a pre-recorded pattern of a plurality of repeating servo bursts (A, B, C, D), each burst having a predetermined integral fraction radial offset relative to the other bursts. A read/write head (34) is positionable relative to data tracks (42) in response to information derived from the servo bursts (A, B, C, D). The data storage system further includes a plurality of calibration tracks (-1, 0, +1), each track including a first series of head-positioning servo sectors interspersed with a second series of calibration servo sectors. The calibration servo sectors include full amplitude servo bursts (A and B) which are read and processed by an electronic circuit (72) which defines a magnitude and polarity signal representing the electronic offset introduced by the circuitry.