MAGNETIC DISK DEVICE, AND RECORDING MEDIUM STORING METHOD FOR DECIDING WRITE COMPENSATION AMOUNT AND PROGRAM FOR CONTROLLING WRITE COMPENSATION AMOUNT

摘要

PROBLEM TO BE SOLVED: To perform write compensation capable of sufficiently absorbing variance in peak shift by automatically setting a write compensation amount for each of zones for dividing a magnetic disk in a track direction or each magnetic head. ;SOLUTION: In a magnetic disk device provided with a write compensation circuit 11 for receiving write data and performing write compensation for the data, an HAD 12, a peak detection circuit 13 for receiving the output of the HAD 12, detecting the peak of a read waveform and outputting a peak pulse and a data identification circuit 14 for outputting read data based on the peak detection result of the peak detection circuit 13 and a read clock, a pattern discrimination circuit 15 is provided for comparing the write data with the read data and discriminating coincidence of the bath data, and a write compensation amount setting circuit 16 is provided for setting the write compensation amount of the write compensation circuit for each zone of a magnetic disk or each magnetic head based on the discrimination result of the pattern discrimination circuit 15.;COPYRIGHT: (C)1999,JPO