MSR magneto-optical recording medium, recording and reproducing method therefor, and storage unit using MSR magneto-optical recording medium
AssigneeFujitsu Limited
InventorHiroyuki Edanami
Life of this patent
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Abstract
A storage unit having functions of controlling a write power, a read power and a reproducing magnetic field with respect to an optical recording medium, is provided with a first section for storing test write data on the optical recording medium for each write temperature information during a write, and a second section for controlling at least the reproducing magnetic field depending on optimum reproducing conditions which are obtained by reproducing the test write data corresponding to a write temperature of data which is to be actually reproduced from the optical recording medium during a read.
Claims12
An optical recording medium comprising:
- a test track region corresponding to each zone;
- and
- a corresponding map portion of read test track region,
- wherein:
- said test track region including a test track region portion which includes one or more test tracks to which a test write and a test read are carried out, and a temperature-based read test track region portion,
- said temperature-based read test track region portion includes one or more read test tracks, and a recording is made at an optimum write power for a write temperature during a write and a test read is made during a read so that at least an optimum reproducing magnetic field is set, and
- said corresponding map portion of the read test track region is recorded with an identification symbol which indicates a boundary of a map, a start address and an end address of the read test track for each write temperature information, a start address and an end address of each corresponding data, and an end identification symbol which indicates an end position of the map.
A storage unit having functions of controlling a write power, a read power and a reproducing magnetic field with respect to an optical recording medium, comprising:
- first means for storing test write data on the optical recording medium for each write temperature information during a write;
- and
- second means for controlling at least the reproducing magnetic field depending on optimum reproducing conditions which are obtained by reproducing the test write data corresponding to a write temperature of data which is to be actually reproduced from the optical recording medium during a read.
A recording and reproducing method adapted to a storage unit which has functions of controlling a write power, a read power and a reproducing magnetic field with respect to an optical recording medium, comprising the steps of:
- storing test write data on the optical recording medium for each write temperature information during a write;
- and
- controlling at least the reproducing magnetic field depending on optimum reproducing conditions which are obtained by reproducing the test write data corresponding to a write temperature of data which is to be actually reproduced from the optical recording medium during a read.
An optical recording medium comprising:
- a test track region corresponding to each zone,
- said test track region including a corresponding map portion of a read test track region, a test track region portion, and a temperature-based read test track region portion,
- said test track region portion including one or more test tracks to which a test write and a test read are carried out,
- said temperature-based read test track region portion including one or more read test tracks, and a recording is made at an optimum write power for a write temperature during a write and a test read is made during a read, so that at least an optimum reproducing magnetic field is set,
- said corresponding map portion of the read test track region including an identification symbol which indicates a boundary of a map, a start address and an end address of a read test track for each write temperature information, a start address and an end address of each corresponding data, and an end identification symbol which indicates an end position of the map.
A storage unit having functions of controlling a write power, a read power and a reproducing magnetic field with respect to an optical recording medium, comprising:
- a first control section to store test write data on the optical recording medium for each write temperature information during a write;
- and
- a second control section to control at least the reproducing magnetic field depending on optimum reproducing conditions which are obtained by reproducing the test write data corresponding to a write temperature of data which is to be actually reproduced from the optical recording medium during a read.
Dependencies are inferred from the claim text.