Data storage device comprising dual channel preamp circuit
AssigneeWestern Digital Technologies, Inc.
InventorsJunzo Noda, John T. Contreras, Masahito Kobayashi
Life of this patent
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Abstract
A data storage device is disclosed comprising a top head actuated over a top surface of a first disk, a bottom head actuated over a bottom surface of the first disk, a top head actuated over a top surface of a second disk, and a bottom head actuated over a bottom surface of the second disk. A dual channel preamp circuit is coupled to the top and bottom heads of the first and second disks, wherein a selection signal is applied to the dual channel preamp circuit to select between the first disk and the second disk. A concurrent access operation of the top and bottom surface of the selected disk is executed using the dual channel preamp circuit.
Claims16
A data storage device comprising:
- a first disk;
- a top head actuated over a top surface of the first disk;
- a bottom head actuated over a bottom surface of the first disk;
- a second disk;
- a top head actuated over a top surface of the second disk;
- a bottom head actuated over a bottom surface of the second disk;
- a dual channel preamp circuit coupled to the top and bottom heads of the first and second disks, the dual channel preamp circuit comprising:
- a write line and a read line of a first channel;
- a write line and a read line of a second channel;
- first enable circuitry configured to couple at least one of the write line or the read line of the first channel to the top head of the first disk and to couple at least one of the write line or the read line of the second channel to the bottom head of the first disk;
- and
- second enable circuitry configured to couple at least one of the write line or the read line of the second first channel to the top head of the second disk and to couple at least one of the write line or the read line of the second channel to the bottom head of the second disk;
- and
- control circuitry configured to:
- apply a selection signal to the dual channel preamp circuit to select between the first disk and the second disk;
- and
- execute a concurrent access operation of the top and bottom surfaces of the selected disk using the dual channel preamp circuit.
A dual channel preamp circuit comprising:
- a write line and a read line of a first channel;
- a write line and a read line of a second channel;
- first enable circuitry configured to couple at least one of the write line or the read line of the first channel to a top head of a first disk and to couple at least one of the write line or the read line of the second channel to a bottom head of the first disk;
- and
- second enable circuitry configured to couple at least one of the write line or the read line of the second first channel to a top head of a second disk and to couple at least one of the write line or the read line of the second channel to a bottom head of the second disk.
A data storage device comprising:
- a first disk;
- a top head actuated over a top surface of the first disk;
- a bottom head actuated over a bottom surface of the first disk;
- a second disk;
- a top head actuated over a top surface of the second disk;
- a bottom head actuated over a bottom surface of the second disk;
- a dual channel preamp circuit coupled to the top and bottom heads of the first and second disks;
- and
- control circuitry configured to:
- apply a selection signal to the dual channel preamp circuit to select between the first disk and the second disk;
- and
- execute a concurrent access operation of the top and bottom surface of the selected disk using the dual channel preamp circuit,
- wherein the concurrent access operation comprises a first write operation to the top surface of the selected disk and a second write operation to the bottom surface of the selected disk, wherein the first write operation at least partially overlaps with the second write operation.
Dependencies are inferred from the claim text.