CIRCUIT AND METHOD FOR REFRESHING DATA RECORDED SUFFICIENTLY HIGHLY DENSELY SO AS TO CAUSE DETERIORATION DUE TO HEAT

摘要

PROBLEM TO BE SOLVED: To provide a method for refreshing a storage medium before the data highly densely recorded on the storage medium causes a hard error by the deterioration due to the heat. SOLUTION: This method contains a process writing the data in the storage medium sufficiently highly densely so as to naturally cause the deterioration of the data when a time lapses, the process automatically reading out the data before a hard error occurs and the second process writing the data in the storage medium.