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An information storage medium in which speed information has been recorded, and a method of recording and/or repro ducing data on the information storage medium. The infor mation storage medium includes a reproduction-only area in which recording speed information and/or reproducing speed information which indicate whether a drive can record and/or reproduce data on the information storage medium are recorded. The method of recording and/or reproducing data in an information storage medium, the method includes: record ing, as reproduction-only data in a reproduction-only area, recording speed information and/or reproducing speed infor mation, which is used to indicate speed capabilities to a drive; and recording or reproducing data on the information storage medium when a recording speed or a reproducing speed capa bility of the drive matches the recording speed information or the …