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US 8,958,172 B1Granted
Multiple disk stack, single actuator hard disk drive
AssigneeHGST Netherlands B.V.
InventorUlrich Georg Hansen
Life of this patent
Estimating the term…
Abstract
A lower cost per unit of storage hard disk drive (HDD) includes multiple disk stacks and a single head stack assembly for accessing the magnetic-recording disks of each of the multiple disk stacks asynchronously.
Claims12
A hard disk drive, comprising:
- a plurality of disk stacks, each disk stack comprising one or more magnetic-recording disk rotatably mounted on a spindle;
- and
- only one head stack assembly, comprising:
- only one stack of one or more head slider comprising a magnetic read/write head for reading data from and writing data to one or more magnetic-recording disk,
- only one stack of one or more flexure, to which each respective one or more head slider is coupled,
- only one stack of one or more actuator arm, to which each respective one or more flexure is coupled, and
- an actuator, to which said stack of one or more actuator arm is coupled, said actuator configured to move said one or more head slider to access portions of said one or more magnetic-recording disk of each of the plurality of disk stacks.
4 more elements
A hard disk drive, comprising:
- two disk stacks, each disk stack comprising a plurality of magnetic-recording disks rotatably mounted on a spindle, wherein said spindle of a first disk stack rotates in a clockwise direction and said spindle of a second disk stack rotates in a counter-clockwise direction;
- and
- a single head stack assembly, comprising:
- a head slider comprising a magnetic read/write head for reading data from and writing data to said magnetic-recording disks, and
- an actuator configured to move said head slider to access portions of said plurality of magnetic-recording disks of each of said two disk stacks and wherein each of the two disk stacks is positioned for asynchronous access.
2 more elements
A hard disk drive, comprising:
- four disk stacks, each disk stack comprising a plurality of magnetic-recording disks rotatably mounted on a spindle;
- a single head stack assembly, comprising:
- a head slider comprising a magnetic read/write head for reading data from and writing data to said magnetic-recording disks, and
- an actuator configured to move said head slider in an arc of approximately 270 degrees to access portions of said plurality of magnetic-recording disks of each of said four disk stacks and wherein each of the four disk stacks is positioned for asynchronous access;
- and
- wherein said spindle of at least one of said four disk stacks rotates in both a clockwise direction and a counter-clockwise direction.
3 more elements
Dependencies are inferred from the claim text.