A method of determining recording and/or reproducing information of a recording medium for use with respect to a recording and/or reproducing apparatus, the method comprising:
- reading an extended part version information provided in eight bits of a physical format information zone of a lead in area of the recording medium;
- and
- determining the recording and/or reproducing information of the recording medium for use with respect to the recording and/or reproducing apparatus according to the read extended part version information.