Patent ID: 8750085

Claim:
A record device for performing a record operation while performing a replacement process in units of a predetermined recording block by using a rewritable medium having a user data area, a spare area, and a management information storage area which is updated at least upon using the spare area, the record device comprising: a format process unit for performing a format process including a physical formatting process of the rewritable medium; a replacement process unit for performing the replacement process by using the spare area; a DFL entry search unit for determining and searching for DFL (Defect List) entry information indicating defect type information for each block stored in the management information storage area; and an NAP decision unit for deciding a first block address NAP (next available PSN) to be used next within the spare area, wherein the replacement process unit registers in the DFL entry information a block determined to be a defective block within the spare area upon performing the replacement process, wherein based on the DFL entry information before the format process of the rewritable medium, the format process unit performs the format process to the rewritable medium in such a way as to convert the DFL entry information of a block that is within the spare area and registered in the DFL entry information into an “SPR entry” to be possibly used in the replacement process in future, and wherein the NAP decision unit decides NAP in such a way as not to indicate a first block address registered in the “SPR entry” after the format process.