MAGNETIC DISK DEVICE AND DATA REFRESHING METHOD IN THE SAME

PROBLEM TO BE SOLVED: To prevent data refreshing from being deteriorated in efficiency while coping with the interruption of power. SOLUTION: A flash ROM 114 holds positional information which indicates positions of reserved tracks secured on a disk 101. A CPU 115 reads out data of tracks to be refreshed on the disk 101 through a head 102 and performs refreshing control for writing the data read out to the reserved tracks indicated by the positional information by means of the head. Then, the CPU 115 updates the positional information so that the positions of the tracks from which the data have been read out may be indicated so as to change the tracks from which the data have been read out to new reserved tracks. COPYRIGHT: (C)2010,JPO&INPIT