HEAD CONTROL METHOD AND A RECORDING DEVICE, ESPECIALLY CAPABLE OF CONTROLLING A POSITION OF A HEAD BASED ON SERVO INFORMATION RECORDED ON A DISK-TYPE RECORDING MEDIUM

摘要

PURPOSE: A head control method and a recording device are provided to record position information in radial direction, and to demodulate the position information by using coefficients set in every divided zone, thereby maintaining a throughput of a head. CONSTITUTION: An HDC(Hard Disk Controller)(21) receives a recording command from a host(S1), and transmits a track number to an MCU(29)(S2). The MCU(29) converts the track number into a substantial track number(S3), and issues a head position obtain command to a DSP(28)(S4). The DSP(28) commands the MCU(29) to transmit demodulated results of a head current position(S5). An RDC(24) transmits position information on a head to the MCU(29)(S6). The MCU(29) commands the DSP(28) to move a head arm(S7). The RDC(24) demodulates servo information to send the demodulated information(S9). The MCU(29) decides whether a calculated head position is identical with a desired track number(S10). If so, the MCU(29) commands the head arm to stop moving(S11).