STORAGE DEVICE, CONTROLLER OF STORAGE DEVICE, AND CONTROL METHOD OF STORAGE DEVICE

摘要

A storage device includes a plurality of data storage units that store data; an attribution storage unit that stores an attribution group including each data storage unit on the basis of attributions of the plurality of data storage units; a defect storage unit that stores defects that occurred in a data storage unit; and a preventive-maintenance-subject extracting unit that extracts, as a preventive-maintenance subject, another data storage unit belonging to the same attribution group as the data storage unit in which the defects stored by the defect storage unit has occurred, on the basis of an occurrence history of the defects that occurred in the data storage unit and the attribution group stored by the attribution group storage unit. The storage device also includes a preventive-maintenance performing unit that performs preventive-maintenance on data stored in the other data storage unit extracted by the preventive-maintenance-subject extracting unit.