Patent ID: 8768986

Claim:
An information recording apparatus comprising: a loading section configured to be loaded with a computer-readable recording medium for managing a file on the basis of a file allocation tables (FAT) file system; and a processor including a control section configured, in updating at least one directory entry recorded to a pre-updating area in a second and subsequent dusters in a recording area of directory entries in a predetermined directory in said recording medium, to read data of a recording area of the directory entries from said recording medium, update at least said one directory entry recorded to a post-updating area of the second and subsequent clusters, record the updated data of the post-updating area in the second and subsequent dusters to a free area in said recording medium, and update the file allocation tables of said recording medium and management information corresponding to the file allocation tables such that the area in which the updated data of the area in the second and subsequent clusters is recorded is linked to the area in a first cluster of the recording area in said predetermined directory, wherein the data of the area in the second cluster is collectively replaced or rewritten from the pre-updating second cluster area to the post-updating second cluster area, and wherein FAT updating and directory entry updating are executed at the same time through rewriting a FAT chain to link the second and subsequent clusters with the first cluster, wherein the data of the area of the first cluster includes, at the beginning of the first cluster, a first entry indicating a self entry and a second entry indicating a parent directory, and the data of the area of the second cluster includes, at the beginning of the second cluster, a third entry other than the first entry or the second entry.