Data recorder

A data recording apparatus that writes, when a recording instruction of a data signal is applied, into a first area of a recording medium predetermined information indicating a predetermined value, records into a second area of said recording medium said data signal to which a plurality of markers are assigned in a predetermined manner, writes into a third area of said recording medium recording location information of said data signal after completing recording said data signal, and updates a value indicated by said predetermined information, comprising:

• a predetermined information detection means for detecting said predetermined information from said first area when a driving power is input;
• a marker detection means for detecting from said second area said plurality of markers corresponding to said predetermined information when said predetermined information detected by said predetermined information detection means indicates said predetermined value;
• a creating means for creating said recording location information based on a detection result of said marker detection means;
• and
• a writing/updating means for writing into said third area said recording location information created by said creating means, and updating a value indicated by said predetermined information detected by said predetermined information detection means.