Patent ID: 7667913

Claim:
A control unit for adjusting spacing between a head with a heater and a storage medium of a storage unit by controlling power of the heater, the storage medium being divided into a plurality of sub-areas, said control unit comprising: a processor to control the control unit according to a process including: measuring first values of touchdown heater power upon the head coming in contact with the storage medium at at least one temperature set as a temperature condition for adjusting the spacing, for each of the sub-areas; estimating second values of the touchdown heater power at a second temperature other than the first temperature set on the measurement of the first values, on the basis of a conversion equation obtained from correlation between third values of the touchdown heater power measured in advance at the first temperature and the second temperature, for each of the sub-areas, the conversion equation converting a touchdown heater power at the first temperature to a touchdown heater power at the second temperature; and determining heater power setting values for adjusting the spacing between the head and the storage medium, for each of the sub-areas, by using the first values and the second values.