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US 11,929,104 B2Granted
Data storage drive with dedicated erase transducer
AssigneeSeagate Technology LLC
InventorsLihong Zhang, Xiong Liu
Life of this patent
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Abstract
A recording head has a magnetic write transducer having a first crosstrack width operable to write a single track of data at a time to a magnetic disk. The recording head also has a magnetic erase transducer separate from the magnetic write transducer. The magnetic erase transducer has a second crosstrack width operable to simultaneously erase multiple tracks of data from the magnetic disk.
Claims19
A recording head, comprising:
- a magnetic write transducer having a first crosstrack width operable to write a single track of data at a time to a magnetic disk;
- and
- a magnetic erase transducer separate from the magnetic write transducer, wherein the magnetic erase transducer is aligned with and offset from the magnetic write transducer in a crosstrack direction, the magnetic erase transducer comprising two or more crosstrack segments that can be individually activated, the two or more crosstrack segments having different crosstrack widths, at least one of the different crosstrack widths corresponding to a second crosstrack width operable to simultaneously erase multiple tracks of data from the magnetic disk.
A data storage device, comprising:
- a magnetic disk;
- a recording head comprising:
- a magnetic write transducer having a first crosstrack width;
- and
- a magnetic erase transducer physically and electrically separate from the magnetic write transducer, the magnetic erase transducer comprising two or more crosstrack segments that can be individually activated, the two or more crosstrack segments having different crosstrack widths, at least one of the different crosstrack widths corresponding to a second crosstrack width at least two times larger than the first crosstrack width;
- and
- a controller coupled to the recording head and operable to:
- send a write signal to cause the magnetic write transducer to write single tracks of encoded user data at a time to the magnetic disk;
- and
- send an erase signal to cause the magnetic erase transducer to simultaneously erase multiple tracks of the encoded user data from the magnetic disk.
7 more elements
A method comprising:
- sending a write signal to cause a magnetic write transducer to write single tracks of encoded user data at a time to a magnetic disk, the magnetic write transducer having a first crosstrack width and integrated into a recording head;
- activating a first crosstrack segment of a magnetic erase transducer integrated into the recording head to simultaneously erase multiple tracks of the encoded user data from the magnetic disk, the magnetic erase transducer physically and electrically separate from the magnetic write transducer in the recording head, the first crosstrack segment having a second crosstrack width at least two times larger than the first crosstrack width;
- and
- activating a second crosstrack segment of the magnetic erase transducer different from the first crosstrack segment to erase at least one other track of the encoded user data from the magnetic disk at a width that is different than the second crosstrack width.
1 more element
Dependencies are inferred from the claim text.