Patent ID: 7178087

Claim:
A method of providing a read-only record carrier on which user data can be recorded at predetermined recordable positions of subcode frames of a subcode channel after mastering of said record carrier, said method comprising the steps of: setting the subcode symbols at said predetermined recordable positions to a first predetermined symbol value during mastering; calculating, for each subcode frame, error detections data over certain subcode data of said subcode frame including said subcode symbols set to said first predetermined symbol value; storing said error detection data at auxiliary data positions in said subcode frame; and setting error detection data positions in said subcode frame to a second predetermined symbol value, wherein said predetermined recordable positions of said subcode frames are provided for recording of user data to said predetermined recordable positions during writing of data, and said error detection data positions of said subcode frames are provided for recording correct error detection data, calculated after recording said user data to said predetermined recordable positions, to said error detection data positions.