Generating position error signal based on data tracks for magnetic data storage

A hard disk drive circuit comprising:

• a first inter-track interference detection module configured to generate a first measured inter-track interference value based on a first read signal from a first read sensor positioned over a magnetic medium;
• a second inter-track interference detection module configured to generate a second measured inter-track interference value based on a second read signal from a second read sensor positioned over the magnetic medium;
• a position error signal generation module configured to generate a position error signal based on the first measured inter-track interference value and the second measured inter-track interference value;
• and
• an arm control module configured to control rotation of an arm in response to the position error signal, wherein the first read sensor and the second read sensor are located at a distal end of the arm,
• wherein the position error signal generation module is configured to generate the position error signal based on (i) a first difference between the first measured inter-track interference value and a first target inter-track interference value and (ii) a second difference between the second measured inter-track interference value and a second target inter-track interference value.

A hard disk drive circuit comprising:

• a first inter-track interference detection module configured to generate a first measured inter-track interference value based on a first read signal from a first read sensor positioned over a magnetic medium;
• a second inter-track interference detection module configured to generate a second measured inter-track interference value based on a second read signal from a second read sensor positioned over the magnetic medium;
• a position error signal generation module configured to generate a position error signal based on the first measured inter-track interference value and the second measured inter-track interference value;
• an arm control module configured to control rotation of an arm in response to the position error signal, wherein the first read sensor and the second read sensor are located at a distal end of the arm;
• and
• an offset calibration module configured to specify an offset between the first read sensor and the second read sensor in response to a number, wherein the number identifies which track of the magnetic medium is being read by the hard disk drive circuit.

A method of operating a hard disk drive circuit, the method comprising:

• generating a first measured inter-track interference value based on a first read signal from a first read sensor positioned over a first track of a magnetic medium, wherein the first measured inter-track interference value indicates an amount of energy contributed to the first read signal by tracks adjacent to the first track compared to an amount of energy contributed to the first read signal by the first track;
• generating a second measured inter-track interference value based on a second read signal from a second read sensor positioned over a second track of the magnetic medium, wherein the second measured inter-track interference value indicates an amount of energy contributed to the second read signal by tracks adjacent to the second track compared to an amount of energy contributed to the second read signal by the second track;
• generating a position error signal based on the first measured inter-track interference value and the second measured inter-track interference value;
• and
• controlling rotation of an arm in response to the position error signal, wherein the first read sensor and the second read sensor are located at a distal end of the arm.

A method of operating a hard disk drive circuit, the method comprising:

• generating a first measured inter-track interference value based on a first read signal from a first read sensor positioned over a magnetic medium;
• generating a second measured inter-track interference value based on a second read signal from a second read sensor positioned over the magnetic medium;
• generating a position error signal based on the first measured inter-track interference value and the second measured inter-track interference value;
• and
• controlling rotation of an arm in response to the position error signal, wherein the first read sensor and the second read sensor are located at a distal end of the arm,
• wherein the position error signal is generated based on (i) a first difference between the first measured inter-track interference value and a first target inter-track interference value and (ii) a second difference between the second measured inter-track interference value and a second target inter-track interference value.

A method of operating a hard disk drive circuit, the method comprising:

• generating a first measured inter-track interference value based on a first read signal from a first read sensor positioned over a magnetic medium;
• generating a second measured inter-track interference value based on a second read signal from a second read sensor positioned over the magnetic medium;
• generating a position error signal based on the first measured inter-track interference value and the second measured inter-track interference value;
• controlling rotation of an arm in response to the position error signal, wherein the first read sensor and the second read sensor are located at a distal end of the arm;
• and
• specifying an offset between the first read sensor and the second read sensor in response to a number, wherein the number identifies which track of the magnetic medium is being read by the hard disk drive circuit.