Data storage device using laterally offset read element to compensate for tape stretch
AssigneeWestern Digital Technologies, Inc.
InventorsMark L. Watson, Diane L. Brown, David J. Seagle
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Abstract
A data storage device configured to access a magnetic tape is disclosed, wherein the data storage device comprises at least one head configured to access the magnetic tape, wherein the head comprises a write element, a first read element substantially aligned with the write element, and a second read element laterally offset from the first read element. Data is written to a data track and read-after-write verify is performed using the write element and the first read element. In response to a read command received from a host, the data track is read using the second read element to compensate for a stretching of the magnetic tape.
Claims26
A data storage device configured to access a magnetic tape, the data storage device comprising:
- at least one head configured to access the magnetic tape, wherein the head comprises a write element, a first read element substantially aligned with the write element, and a second read element laterally offset from the first read element;
- and
- control circuitry configured to:
- write to a data track and perform read-after-write verify using the write element and the first read element;
- and
- in response to a read command received from a host, read from the data track using the second read element to compensate for a stretching of the magnetic tape.
A data storage device configured to access a magnetic tape, the data storage device comprising:
- at least one head configured to access the magnetic tape, wherein the head comprises a write element and a first read element laterally offset from the write element;
- and
- control circuitry configured to:
- tension the magnetic tape based on a first target tension and write data to a data track;
- and
- in response to a read command received from a host, tension the magnetic tape based on a second target tension different from the first target tension and read from the data track using the first read element.
A data storage device configured to access a magnetic tape, the data storage device comprising:
- a head bar configured to access the magnetic tape, wherein the head bar comprises a first plurality of read elements and a second plurality of read elements each laterally offset from a corresponding one of the first plurality of read elements,
- wherein the lateral offset between the second plurality of read elements and the first plurality of read elements increases toward an outer edge of the magnetic tape.
A data storage device configured to access a magnetic tape, the data storage device comprising:
- at least one head configured to access the magnetic tape, wherein the head comprises a write element, a first read element substantially aligned with the write element, and a second read element laterally offset from the first read element;
- and
- a means for writing to a data track and for performing a read-after-write verify using the write element and the first read element;
- and
- in response to a read command received from a host, a means for reading from the data track using the second read element.
Dependencies are inferred from the claim text.