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US 10,510,373 B1Granted
Multiple-actuator drive with separate, radially-defined, zones having reduced skew and/or different track properties
AssigneeSeagate Technology LLC
InventorsSteven Douglas Granz, Mehmet Fatih Erden
Life of this patent
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Abstract
First tracks are read via a first head that is moved via a first actuator over a first, radially-defined, zone of a disk surface. Second tracks are read via a second head that is moved via a second actuator over a second zone of the disk surface that is separate from the first zone. The first and second heads are optimized to read data within first and second skew angle ranges associated with the first and second zones. The first and second skew angle ranges are each less than a total skew angle range of the disk surface.
Claims20
A method comprising:
- reading first tracks via a first head that is moved via a first voice coil motor over a first, radially-defined, zone of a disk surface, the first voice coil motor and first head rotating about a first pivot;
- reading second tracks via a second head that is moved via a second voice coil motor over a second zone of the disk surface that is separate from the first zone, the second voice coil motor and second head rotating about a second pivot independently from the first voice coil motor and first head, the second pivot being different from the first pivot, the first and second heads being optimized to read data within first and second skew angle ranges associated with the first and second zones, the first and second skew angle ranges each being less than a total skew angle range of the disk surface;
- and
- reading from both the entire first and second zones via at least one of the first and second heads.
1 more element
A method comprising:
- writing separated tracks to a first, radially-defined, zone of a disk surface of a drive via a first head that is moved via a first voice coil motor over the first zone, the first voice coil motor and first head rotating about a first pivot;
- writing partially overlapping tracks to a second, radially-defined, zone of the disk surface that is separate from the first zone via a second head that is moved via a second voice coil motor over the second zone, the second voice coil motor and second head rotating about a second pivot independently from the first voice coil motor and first head, the second pivot being different from the first pivot;
- and
- reading the partially overlapping tracks within the second zone via first and second read transducers of the second head, a skew range of the second zone facilitating closer spacing between the first and second read transducer relative to a multiple-reader head that reads over a total skew angle range of the disk surface;
- and
- reading from both the entire first and second zones via at least one of the first and second read transducers.
3 more elements
An apparatus, comprising:
- interface circuitry operable to communicate with first and second heads and with first and second voice coil motors that respectively move the first and second heads independently over a disk surface, the first and second voice coil motors rotating about respective different first and second pivots;
- and
- a controller coupled to the interface circuitry and configured to:
- read first tracks via the first head from a first, radially-defined, zone of the disk surface;
- read second tracks via the second head from a second zone of the disk surface that is separate from the first zone, the first and second heads being optimized for first and second skew angle ranges associated with the first and second zones, the first and second skew angle ranges each being less than a total skew angle range of the disk surface;
- and
- read from both the entire first and second zones via at least one of the first and second heads.
4 more elements
Dependencies are inferred from the claim text.