Method for positioning a magnetic head in accordance with digital peak values corresponding to servo data and magnetic disk positioning apparatus for the same
AssigneeKabushiki Kaisha Toshiba
InventorTetsuji Sakurai
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Abstract
A magnetic disk driving apparatus comprises a driving section for driving a magnetic head on a destination track, in response to an input drive instruction, a detecting section for detecting peak values of signal components corresponding to servo data read out from the magnetic disk by the magnetic head, and a controller for generating a drive instruction in accordance with a plurality of selected peak values of the detected peak values to output the generated instruction to said driving section.
Claims13
A magnetic disk positioning apparatus having a magnetic head and capable of accurately positioning said magnetic head on a destination track of a magnetic disk, comprising:
- storage means for storing digital peak values;
- detecting means for detecting peak values of analog signal components corresponding to servo data read out from said magnetic disk by said magnetic head, digitalizing the detected peak values to obtain the digital peak values and storing the digital peak value in said storage means;
- averaging means for creating a digital average value of the detected peak values of the analog signal components;
- control means for reading out the digital peak values from said storage means and generating a positioning instruction in accordance with a plurality of selected digital peak values from among the digital peak values read out from said storage means wherein said selected signals fall within a predetermined range from said created average value;
- and
- positioning means for positioning said magnetic head on the destination track in accordance with the positioning instruction generated by said control means.
A method of accurately positioning a magnetic head on a destination track of a magnetic disk, said method comprising the steps of:
- reading out servo data from said magnetic disk by means of said magnetic head to detect digital peak values from analog signal components corresponding to the servo data;
- storing the digital peak values in a memory;
- calculating the digital average of said stored peak values;
- reading out the digital peak values from the memory to generate a drive instruction in accordance with a plurality of selected digital peak values of the read-out digital peak values wherein said selected digital peak value falls within a predetermined range from said calculated average value;
- and
- driving said magnetic head on the destination track in accordance with the drive instruction.
Dependencies are inferred from the claim text.