Patent ID: 8000050

Claim:
A magnetic storage control apparatus for controlling a magnetic storage apparatus that uses a recording medium having a plurality of reference signals on its track and having a data area between the reference signals, comprising: a measurement section that reproduces the reference signal in a predetermined track of the recording medium and measures, for each data area, the time for a head to scan the data area to obtain a measurement value; a calculation section that calculates a setting value concerning the frequency of a recording clock used in data recording based on the measurement values of a plurality of data areas obtained by the measurement section; and a generation section that generates the recording clock based on the measurement values obtained by the measurement section and setting value calculated by the calculation section, wherein the generation section sets the frequency of the recording clock based on the measurement values obtained by the measurement section and adjusts the delay of the recording clock based on the setting value calculated by the calculation section, the calculation section calculates the setting value corresponding to a plurality of timings in the data area, and the generation section adjusts, at each of the plurality of timings, the delay of the recording clock based on the setting value corresponding to the timing.