Patent ID: 7269613

Claim:
An information recording medium comprising a data recording area, wherein: a lead-in area and a volume space are allocated in the data recording area in advance; a logical zone for recording at least a volume-file structure and an over-run protection area for preventing an access to an unrecorded area are alternately allocated in the volume space; the lead-in area and the over-run protection area each include a chain volume management information area; chain volume management information including address information of a subsequent logical zone and address information of a subsequent chain volume management information area is recorded in the chain volume management information area; an advanced VAT structure area is further allocated in the volume space; an advanced VAT for managing a correspondence between a virtual address indicating an address in a virtual address space and a logical address indicating an address in a logical address space is recorded in the advanced VAT structure area; and basic structure information indicating a file structure is assigned at a specific virtual address in the advanced VAT, the basic structure information being indispensable for searching all files recorded in the information recording medium.