Patent ID: 7518966

Claim:
A recording/reproduction apparatus for recording/reproducing data onto/from an information recording medium, comprising: a section for reading first data from a first predetermined position in a data recording area of the information recording medium; a section for determining whether or not the first data matches first type information indicating a type of a first predetermined file system; a section for executing a recording process or a reproduction process using the first predetermined file system when it is determined that the first data matches the first type information; a section for reading second data from a second predetermined position of the data recording area when it is determined that the first data does not match the first type information; a section for determining whether or not the second data matches second type information indicating a type of a second predetermined file system which is different from that of the first predetermined file system; and a section for executing a recording process or a reproduction process using the second predetermined file system when it is determined that the second data matches the second type information.