DATA ERASING METHOD FOR MAGNETIC DISK DEVICE, MAGNETIC DISK DEVICE, DATA ERASING PROGRAM, AND NONVOLATILE STORAGE MEDIUM

PROBLEM TO BE SOLVED: To erase all data recorded in a magnetic disk device including data of an area inaccessible from the host device of the magnetic disk device. SOLUTION: This method includes: a step of setting the head position of the magnetic disk device in the nearly center position of a data erasing target track N+1 to write predetermined erasing data in the center position; a step of moving the head position from the nearly center position of the data erasing target track N+1 to an outer peripheral side to write predetermined erasing data in the area 201a of a gap between tracks on the outer peripheral side of the data erasing target track N+1; and a step of moving the head position from the nearly center position of the data erasing target track N+1 to an inner peripheral side to write predetermined erasing data in the area 202a of a gap between tracks on the inner peripheral side of the data erasing target track N+1. COPYRIGHT: (C)2008,JPO&INPIT