Recording and reproducing control method of information

PURPOSE:To provide a method for improving the reliability of information and recording capacity by controlling the length and width of a recording mark to be recorded in a recording medium with a high accuracy. CONSTITUTION:The title method has a trial writing apparatus 3 for performing trial writing, a recording waveform generator 5 for generating a signal to be recorded in a recording medium and a comparative discriminator 16 for comparing a reproducing code array 25 obtained from a recording mark with a recording code array 20 so that the variation of the recording mark by the variation of recording sensitivity, etc., is reduced as much as possible.