Disk writing/reproducing apparatus and method

A disk reproducing apparatus comprising:

• a temperature sensor which senses a reproducing temperature indicating an ambient temperature of a disk at which data is reproduced from the disk;
• a reproducing unit which reproduces the data written on the disk;
• a sync mark detector which detects a sync mark from the data reproduced by the reproducing unit;
• and
• a parameter setting controller which controls setting of parameters of the reproducing unit according to a writing temperature, which indicates an ambient temperature at which the data was written and is obtained from the sync mark detected by the sync mark detector, and the reproducing temperature sensed by the temperature sensor.

A disk writing method comprising:

• sensing a writing temperature indicating an ambient temperature at which data is written on a disk;
• generating a sync mark indicating a head of data which is written and having a pattern corresponding to the writing temperature which is sensed;
• adding the sync mark to the data;
• and
• writing on the disk the data to which the sync mark has been added.

A disk reproducing method comprising:

• reproducing data written on a disk;
• detecting a sync mark from the data written on the disk;
• and
• setting parameters of a reproducing unit reproducing the written data according to a writing temperature indicating an ambient temperature at which the data was written, which is determined from the sync mark, and a reproducing temperature indicating an ambient temperature at which the written data is reproduced.