Servo Concept With Multi-Element Transducers for Achieving High Track Densities
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Future objectives for data storage areal density in DASD (direct-access storage device) products will require track densities greater than 1600 tracks per inch. To accomplish this, it has been proposed to servo the actuator with one of two basic techniques: 1. Embed servo information either magnetically, optically, or capacitively beneath the disk magnetic recording layer used for data and read this servo information with a transducer located to the side of the read/write (R/W) transducer. These approaches add significant complexity to the disk process and some are functionally incompatible with specific technologies proposed for the magnetic recording layer. 2.