Data storage device servoing heads based on virtual servo tracks
AssigneeWestern Digital Technologies, Inc.
InventorsMichael Chang, Wei Guo, Yun Hong, Brian P. Rigney, Guoxiao Guo
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Abstract
A data storage device is disclosed comprising a first disk surface comprising servo tracks defined by servo sectors and recorded at a first radial density, and a first head actuated over the first disk surface. A servo sector on the first disk surface is read to generate a first physical position measurement that is converted into a first virtual position measurement corresponding to a nominal radial density of servo tracks different from the first radial density. The first head is servoed over the first disk surface based on the first virtual position measurement.
Claims26
A data storage device comprising:
- a first disk surface comprising servo tracks defined by servo sectors and recorded at a first radial density;
- a first head actuated over the first disk surface;
- and
- control circuitry configured to:
- read a servo sector on the first disk surface to generate a first physical position measurement;
- first convert the first physical position measurement into a first virtual position measurement corresponding to a nominal radial density of servo tracks different from the first radial density;
- and
- servo the first head over the first disk surface based on the first virtual position measurement.
A method of operating a data storage device, the method comprising:
- reading a servo sector on a first disk surface to generate a first physical position measurement;
- first converting the first physical position measurement into a first virtual position measurement corresponding to a nominal radial density of servo tracks different from a first radial density of servo tracks on the first disk surface;
- and
- servoing a first head over a first disk surface based on the first virtual position measurement.
Dependencies are inferred from the claim text.