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US 7,019,924 B2Granted
Patterned medium and recording head
AssigneesKomag, Inc., Maxtor Corporation
InventorsMichael McNeil, John Vicars, David Wachenschwanz
Life of this patent
Estimating the term…
Abstract
A magnetic recording system includes a patterned medium comprised of land areas and trough areas, a write element which writes the data to the patterned medium, and a read element which reads the data from the patterned medium and servo information from the troughs. The land areas store data and the trough areas inhibit storage of data. The read element is wider than the write element.
Claims51
A magnetic recording system comprising:
- a patterned medium comprising land areas and trough areas, the land areas to store data and the trough areas to inhibit storage of data;
- a write element which writes the data to the patterned medium;
- and
- a read element which reads the data from the patterned medium, the read element being wider than the write element, wherein:
- the read element and the write element are part of a recording head that flies over the patterned medium during reading and writing;
- and
- the trough areas have a depth relative to the recording head that is sufficient to prevent magnetic writing of data to the trough areas.
4 more elements
A magnetic recording system comprising:
- a patterned medium comprising land areas and trough areas, the land areas to store data and the trough areas to inhibit storage of data;
- a write element which writes the data to the patterned medium;
- and
- a read element which reads the data from the patterned medium, the read element being wider than the write element, the read element and the write element being part of a recording head that flies over the patterned medium during reading and writing, wherein the land areas comprise data islands which are isolated from one another by the trough areas.
1 more element
A disk drive comprising:
- a magnetic disk having a plurality of tracks which store data, the tracks comprising land areas for storing the data and trough areas which substantially isolate the land areas from one another;
- and
- a recording head which transfers data to and from the magnetic disk, the recording head comprising a write element and a read element, the read element having a width that is greater than a width of the write element.
An apparatus comprising:
- storing means for storing data magnetically in data tracks, the data tracks being separated by erase bands that are physically stamped onto the storing means;
- writing means for writing data to the storing means;
- and
- reading means for reading data from the storing means, the reading means having a width that is greater than a width of the writing means, wherein:
- the reading means and the writing means are part of a recording means that flies over the storing means during reading and writing;
- and
- the erase bands comprise troughs that have a depth relative to the recording means that is sufficient to prevent magnetic writing of data to the troughs.
4 more elements
An apparatus comprising:
- storing means for storing data magnetically in data tracks, the data tracks being separated by erase bands that are physically stamped onto the storing means;
- writing means for writing data to the storing means;
- and
- reading means for reading data from the storing means, the reading means having a width that is greater than a width of the writing means, the reading means and the writing means being part of a recording head that flies over the storing means during reading and writing, wherein the data tracks comprise sequences of data islands separated by troughs.
1 more element
A magnetic recording system comprising:
- a patterned medium comprising land areas and trough areas, the land areas to store data and the trough areas to inhibit storage of data;
- and
- a recording head to read and write data to the land areas of the patterned medium, the recording head having a read element, the read element having a width that is greater than a width of the land areas, wherein the recording head further comprises a write element that has a width that is less than the width of the read element and that is greater than or equal to the width of the land areas.
A magnetic recording system comprising:
- a patterned medium comprising land areas and trough areas, the land areas to store data and the trough areas to inhibit storage of data;
- and
- a recording head to read and write data to the land areas of the patterned medium, the recording head having a read element, the read element having a width that is greater than a width of the land areas, wherein the land areas comprise data islands which are isolated from one another by the trough areas.
A magnetic recording medium comprising:
- land areas which store data;
- and
- trough areas which store servo information, wherein the trough areas include steps, the steps having a height that is less than the land areas relative to the troughs, and the steps comprising the servo information.
A magnetic recording medium comprising:
- land areas which store data;
- and
- trough areas which store servo information, wherein a land area comprises a data track, a first trough borders one side of the land area, and a second trough borders another side of the land area, wherein the servo information in the first trough is at a different frequency than the servo information in the second trough.
A magnetic recording system comprising:
- a patterned medium comprised of land areas and trough areas, the land areas storing data and the trough areas storing servo information;
- and
- a recording head which reads and writes data to the land areas of the patterned medium and which reads servo information from the trough areas, wherein the recording head has a read element and a write element, the read element having a width that is greater than a width of the write element.
A magnetic recording system comprising:
- a patterned medium comprised of land areas and trough areas, the land areas storing data and the trough areas storing servo information;
- and
- a recording head which reads and writes data to the land areas of the patterned medium and which reads servo information from the trough areas, wherein the trough areas include steps, the steps having a height that is less than the land areas relative to the troughs, and the steps comprising the servo information.
A magnetic recording system comprising:
- a patterned medium comprised of land areas and trough areas, the land areas storing data and the trough areas storing servo information;
- and
- a recording head which reads and writes data to the land areas of the patterned medium and which reads servo information from the trough areas, wherein a land area comprises a data track, a first trough borders one side of the land area, and a second trough borders another side of the land area, wherein the servo information in the first trough is at a different frequency than the servo information in the second trough.
A method of accessing data, comprising:
- moving a recording head over a patterned medium comprised of land areas and trough areas, the land areas storing data and the trough areas storing servo information;
- transferring data on a land area;
- reading servo information from trough areas at the same time as transferring the data;
- and
- using the servo information to move the recording head relative to the land area, wherein the recording head has a read element and a write element, the read element having a width that is greater than a width of the write element.
2 more elements
A method of accessing data, comprising:
- moving a recording head over a patterned medium comprised of land areas and trough areas, the land areas storing data and the trough areas storing servo information;
- transferring data on a land area;
- reading servo information from trough areas at the same time as transferring the data;
- and
- using the servo information to move the recording head relative to the land area, wherein the land area comprises a data track, a first trough borders one side of the land area, and a second trough borders another side of the land area;
- and
- using the servo information to move the recording head comprises comparing servo information from the first trough to servo information from the second trough and re-positioning the recording head based on the comparison, and wherein the servo information in the first trough is at a different frequency than the servo information in the second trough.
4 more elements
Dependencies are inferred from the claim text.