Selectable magnetic writers of different target geometries for reducing performance variance
AssigneeSeagate Technology LLC
InventorsKurt Wiesen, Javier Guzman, Joseph Mundenar, Michael Conover
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Abstract
A method of forming a recording head for use with a data storage medium in a data storage device. The method includes forming first and second writers of different target geometries. A first recording measurement is performed on one or more storage media using the first writer. A second recording measurement is performed on the one or more storage media using the second writer. Based on a comparison of the first and second recording measurements to a predetermined quantity, either the first writer or the second writer is selected to be operational in the data storage device.
Claims13
A method of forming a recording head, the method comprising:
- forming first and second writers of different target geometries;
- performing a first recording measurement on one or more storage media using the first writer;
- performing a second recording measurement on the one or more storage media using the second writer;
- and
- selecting either the first writer or the second writer to be operational in a data storage device based on a comparison of the first and second recording measurements to a predetermined quantity,
- wherein either the first writer or the second writer that is not selected is not configured to record user data in the data storage device, and
- wherein the first recording measurement is a function of a magnetic writer width of the first writer, and wherein the second recording measurement is a function of a magnetic writer width of the second writer, and wherein the predetermined quantity is a function of a median magnetic writer width.
A method comprising:
- forming a plurality of writers with each of the plurality of writers having a different target geometry;
- performing recording measurements on one or more storage media using each different one of the plurality of writers;
- and
- selecting one of the plurality of writers to be operational in a data storage device based on a comparison of the recording measurements of the different ones of the plurality of writers to a predetermined quantity,
- wherein another one of the plurality of writers that is not selected is not configured to record user data in the data storage device, and
- wherein the recording measurements on the one or more storage media using each different one of the plurality of writers are functions of magnetic writer widths of different ones of the plurality of writers, and wherein the predetermined quantity is a function of a median magnetic writer width.
Dependencies are inferred from the claim text.