Semiconductor memory card access apparatus, a computer-readable recording medium, an initialization method, and a semiconductor memory card

摘要

A predetermined number of erasable blocks positioned at a start of a volume area in a semiconductor memory card are provided so as to include volume management information. A user area following the volume management information includes a plurality of clusters. A size of a partition control area from a master boot record & partition table sector to a partition boot sector is determined so that the plurality of clusters in the user area are not arranged so as to straddle erasable block boundaries. Since cluster boundaries and erasable block boundaries in the user area are aligned, there is no need to perform wasteful processing in which two erasable blocks are erased to rewrite one cluster.

主权项

1. A semiconductor memory module that has a memory area comprising of a plurality of sectors, by managing one or more sectors as a cluster, and managing one or more clusters as a file, some consecutive sectors in the memory area forming a block, the block being a smallest unit on which data erasure can be performed, the semiconductor memory module comprising:
a first area for recording volume management information, a second area for recording a block including a root directory entry, a third area, being formed from sectors following the first area, for recording user data, and a backup area having attribute information of the file recorded therein, wherein the volume management information including a master boot record, a partition table, partition boot sector information, and a file allocation table that indicates, for each file, links between clusters corresponding to the file, the master boot record and the partition table are recorded in a first sector of a first block in the first area, and the partition boot sector information, the file allocation table, and a predetermined number of reserved sectors which are used for padding the first area are recorded in subsequent sectors such that a size of the first area is an integral multiple of the block size.