Method for recording sector control information on magneto-optical disk

Claim 1

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; applying a magnetic field to the disk to orient the reproduction layer in one direction of magnetization; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within a beam spot on the region and thereby to transfer data from the recording layer to the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting the reflected light; and using the reproduced sector control information, reproducing the transferred data from the data-filled domain of the reproduction layer.

Claim 2

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; applying a magnetic field to the disk to orient the reproduction layer in one direction of magnetization; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within a beam spot on the region and thereby to transfer data from the recording layer to the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting the reflected light; and using the reproduced sector control information, reproducing the transferred data from the data-filled domain of the reproduction layer.

Claim 3

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk along a first set of radials on the disk for all odd numbered recording tracks, counting from an innermost recording track, and recording sector control information along a second set of radials on the disk for all even numbered tracks, counting from an innermost recording track, wherein the first set of radials is angularly offset in a rotational direction of the disk from the first set of radials, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; applying a magnetic field to the disk to orient the reproduction layer in one direction of magnetization; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within a beam spot on the region and thereby to transfer data from the recording layer to the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting the reflected light; and using the reproduced sector control information, reproducing the transferred data from the data-filled domain of the reproduction layer.

Claim 4

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk along a first set of radials on the disk for all odd numbered recording tracks, counting from an innermost recording track, and recording sector control information along a second set of radials on the disk for all even numbered tracks, counting from an innermost recording track, wherein the first set of radials is angularly offset in a rotational direction of the disk from the first set of radials, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; applying a magnetic field to the disk to orient the reproduction layer in one direction of magnetization; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within a beam spot on the region and thereby to transfer data from the recording layer to the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting the reflected light; and using the reproduced sector control information, reproducing the transferred data from the data-filled domain of the reproduction layer.

Claim 5

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the recording layer being magnetically connected to the reproduction layer in a steady state, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within the beam spot on the region and thereby to erase a magnetic connection between the recording layer and the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting a reflected light; and using the reproduced sector control information, reproducing data from the region excluding the beam spot containing no magnetic connection following the erasure, the data being read from the recording layer by way of the reproduction layer.

Claim 6

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the recording layer being magnetically connected to the reproduction layer in a steady state, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within the beam spot on the region and thereby to erase a magnetic connection between the recording layer and the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting a reflected light; and using the reproduced sector control information, reproducing data from the region excluding the beam spot containing no magnetic connection following the erasure, the data being read from the recording layer by way of the reproduction layer.

Claim 13

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the recording layer being magnetically connected to the reproduction layer in a steady state, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk along a first set of radials on the disk for all odd numbered recording tracks, counting from an innermost recording track, and recording sector control information along a second set of radials on the disk for all even numbered tracks, counting from an innermost recording track, wherein the first set of radials is angularly offset in a rotational direction of the disk from the first set of radials, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within the beam spot on the region and thereby to erase a magnetic connection between the recording layer and the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting a reflected light; and using the reproduced sector control information, reproducing data from the region excluding the beam spot containing no magnetic connection following the erasure, the data being read from the recording layer by way of the reproduction layer.

Claim 14

A method for recording and reproducing data and sector control information on a magneto-optical disk of the type comprising a recording layer for recording data and a reproduction layer, the recording layer being magnetically connected to the reproduction layer in a steady state, the method comprising the steps of: recording sector control information on the disk in an embossed fashion prior to recording data on the disk, the sector control information being recorded on the disk along a first set of radials on the disk for all odd numbered recording tracks, counting from an innermost recording track, and recording sector control information along a second set of radials on the disk for all even numbered tracks, counting from an innermost recording track, wherein the first set of radials is angularly offset in a rotational direction of the disk from the first set of radials, the sector control information being recorded on the disk in such a manner that no other sector control information is recorded on an adjacent track along a same radial of the disk; after the step of recording the sector control information on the disk, recording data on the disk; irradiating a light beam onto a region on the disk surface so as to raise the temperature above a predetermined temperature level within the beam spot on the region and thereby to erase a magnetic connection between the recording layer and the reproduction layer under the beam spot; reproducing the sector control information from the disc by scanning a light beam along the recording tracks and detecting a reflected light; and using the reproduced sector control information, reproducing data from the region excluding the beam spot containing no magnetic connection following the erasure, the data being read from the recording layer by way of the reproduction layer.