Patent ID: 7586710
Filing Date: 2009-09-08
Classification: G11B

Abstract:
1. A system for dynamically controlling magnetic spacing between a transducer and a data storage tape comprising: a data storage tape drive that has a tape head that includes the transducer; a sensing circuit for measuring instantaneous magnetic clearance between the transducer and the data storage tape by determining the amplitude of a read back signal for a signal of known wavelength, wherein the sensing circuit measures instantaneous magnetic clearance by determining the equation: where V is the instantaneous amplitude, V 0 is the amplitude at d=0, e is the exponential function, d is the distance between the magnetic layer and the read transducer, and λ is the signal wavelength, and generating a spacing signal indicative of the measured clearance that is stored as spacing data; and a temperature control element operatively connected to the tape head that is controlled based upon the spacing data to control the temperature of a portion of the tape head, wherein the temperature is controlled to adjust the distance between the transducer and the data storage tape.