Patent ID: 7539093

Claim:
A recording apparatus compatible with a recording medium which stores at least one of configuration information indicating a configuration of said recording medium and moment-of-inertia information indicating a moment of inertia of said recording medium, said recording apparatus comprising: determining means for determining physical characteristics of said recording medium by reading said at least one of the configuration information and the moment-of-inertia information, the configuration information including diameter information of said recording medium; and recording control means for performing settings for a recording operation according to the physical characteristics determined by said determining means, and for allowing the recording operation to be performed, wherein said determining means reads said at least one of the configuration information and the moment-of-inertia information from a wobbling groove formed on said recording medium, said determining means reads said at least one of the configuration information and the moment-of-inertia information for each of a plurality of areas of a hybrid recording medium, each of the plurality of areas of the hybrid recording medium including different physical characteristics, and wobbling of said wobbling groove is obtained by performing phase modulation on said groove.