Seek control system based upon a detected temperature of a positioning mechanism in a disk device

A seek control system in a disk device including a positioning mechanism having a voice coil motor which positions a head for carrying out read/write operations based upon a detected temperature of said positioning mechanism, said seek control system comprising:

• means for determining an amount of heat causing a temperature rise in said positioning mechanism as the square of a voice coil motor current command value, by which said voice coil motor is controlled to position said head, multiplied by a predetermined coefficient;
• means for storing an amount of naturally radiated heat which is calculated in advance;
• means for integrating, for each of a number of sampling periods, the difference between the amount of naturally radiated heat and the amount of heat causing the determined temperature rise, to calculate a new amount of heat in said positioning mechanism;
• and
• means for calculating the temperature of said positioning mechananism in accordance with the calculated new amount of heat in said positioning mechanism by determining the ratio between the calculated new amount of heat and the thermal capacity of the positioning mechanism.