Magnetic recording medium formed in a plurality of tracks and magnetic recording-reproducing apparatus for the same
AssigneeAlps Electric Co., Ltd.
InventorsTetsuya Mitsuishi, Masayoshi Nakagawa, Makoto Moriya, Takayuki Sugawara, Katsuji Suzuki
Life of this patent
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Abstract
The present invention relates to a magnetic recording medium and a magnetic recording/reproducing apparatus for the same. In the magnetic recording medium there are provided a read/write region which permits modification of written data and a read-only region dedicated to the reading of data, which is used for reading only once writing is done. In recording servo information to a data format region of the magnetic recording medium, the time width of servo information in the read-only region is set shorter than that in the read/write region.
Claims5
A magnetic recording medium comprising magnetic material formed into a plurality of tracks, each of the plurality of tracks having a circumferential length and including a servo region formed in a predetermined portion of the circumferential length;
- wherein said plurality of tracks include at least one read/write track including a servo region having a servo region length measured along the circumferential length of the read/write track, and at least one read-only track including a servo region having a servo region length measured along the circumferential length of the read-only track;
- wherein the servo region length of the read/write track is greater than the servo region length of the read-only track.
A magnetic recording/reproducing apparatus comprising:
- a magnetic recording medium;
- and
- a magnetic head for reading from and writing to the magnetic recording medium;
- wherein the magnetic recording medium includes magnetic material formed into a plurality of tracks, each of the plurality of tracks having a circumferential length and including a servo region including a servo preamble portion formed in a predetermined portion of the circumferential length;
- wherein a first group of said plurality of tracks form a read/write region, each track of the first group including first servo information having a first length measured along the circumferential length of said each track, and including a first servo preamble portion,
- wherein a second group of said plurality of tracks form a read-only region including second servo information having a first length measured along the circumferential length of said each track, and including a second servo preamble portion, and
- wherein a time width for reading the second servo preamble information by the magnetic head is less than a time width for reading the first servo preamble information whereby a time width for reading the second servo information by the magnetic head is less than a time width for reading the first servo information.
A magnetic recording medium comprising magnetic material formed into a plurality of tracks, wherein a track pitch is defined by a spacing between adjacent tracks of the plurality of tracks;
- wherein said magnetic recording medium includes a read/write region formed by a first group of said plurality of tracks, and a read-only region formed by a second group of said plurality of tracks;
- and
- wherein a first track density of said read-only region is greater than a second track density of said read/write region.
Dependencies are inferred from the claim text.