DATA STORAGE DEVICE CAPABLE OF STORING MULTIPLE SETS OF HISTORY INFORMATION ON INPUT/OUTPUT PROCESSING OF SECURITY DATA WITHOUT DUPLICATION

摘要

A data storage device comprises a secure data storge unit (250) including a log memory (253). The log memory (253), composed of multiple banks (2531 to 253N), stores history information in the multiple banks (2531 to 253N) in a ring. Each of the multiple banks (2531 to 253N) is specified by an address (0 to N-1). The history information stored in each of the banks (2531 to 253N) comprises a management number area (2541), a license ID (LID) area (2542), a Ks2x area (2543), an ST1 area (2544), an ST2 area (2545), a KPcmy area (2546), and an LBA area (2547).