Patent ID: 7551530

Claim:
An optical disc recording system comprising: a host apparatus configured to issue commands; and an optical disc recording apparatus configured to carry out a process corresponding to each of said commands, and to reply a response data to said command to said host apparatus, wherein said host apparatus issues a record command as one of said commands to record a record data in an optical disc medium, an optical disc recording apparatus records said record data in a data area in a predetermined format in response to said record command, wherein said optical disc comprises said data area and a first control data recording area, said optical disc recording apparatus additionally sets each of second control data recording areas in said data area in association with a command from said host apparatus as one of said commands, a record status control data is recorded in said first or second control data recording area to indicate record status of said record data, at least a part of information related to said additional setting of a second control data recording area is shared by said host apparatus and said optical disc recording apparatus, wherein when a size of an unused record area remaining in said first control data recording area or said second control data recording areas is equal to or less than a predetermined threshold, it is determined that said second control data recording area should be additionally set in said data area, wherein said predetermined threshold is equal to or larger than 2*m, where m is a number of said tracks accessible at a same time, to one of record units of said record data.