Optical recording/reproducing apparatus in which data will not become unable to be read out in case an SDL fails to be renewed

An optical recording/reproducing apparatus comprising:

• an optical recording medium having
• a recording area in which information is recorded,
• an alternating area in which said information is recorded instead of the recording area when said information fails to be recorded in the recording area, and
• a plurality of control regions in which position information of the recording area having failed to record information and position information of the alternating area in which the information failed to be recorded is recorded instead of said recording area;
• recording means for recording the information in a predetermined information recording area of said optical recording medium;
• a reproducing means for reproducing said information which is recorded from said predetermined information recording area;
• a collating means for collating said information intended to be recorded with said reproduced information obtained by said reproducing means and judging that said information was not correctly recorded in said predetermined recording area;
• an alternating processing means for alternating processing to record said information in said alternating area by said recording means in a case it was judged that the information was not correctly recorded by said collating means;
• and
• a control region renewing means for renewing the contents of said control regions by said recording means, wherein the renewing is carried out by said alternating processing means;
• said control region renewing means carries out a renewal operation with at least one region remaining among a plurality of said control regions, renewing remaining control regions when said renewal operation succeeds and making the remaining control regions not renew when said renewal operation fails.

A method for judging position information for an optical recording/reproducing apparatus having an optical recording medium, the recording medium having a recording area in which information is recorded;

• an alternating area in which said information is recorded instead of the recording area when said information fails to be recorded in the recording area;
• and a plurality of control regions in which position information of the recording area having failed to record information and position information of the alternating area in which the information failed to be recorded is recorded instead of said recording area, comprising the steps of:
• recording information in a predetermined information recording area of said optical recording medium;
• reproducing said information which is recorded from said predetermined information recording area;
• collating said information intended to be recorded with said reproduced information obtained by said reproducing means;
• judging whether or not said information was correctly recorded in said predetermined recording area;
• alternating processing to record said information in said alternating area by said recording means in a case it was judged that the information was not correctly recorded by said collating means;
• and
• renewing the contents of said control regions by said recording means, wherein the renewing is carried out by said alternating processing means, and wherein said control region renewing means carries out a renewal operation with at least one region remaining among a plurality of said control regions, renewing remaining control regions when said renewal operation succeeds and making the remaining control regions not renew when said renewal operation fails.

An optical recording/reproducing apparatus comprising:

• an optical recording medium having
• a recording area in which information is recorded,
• an alternating area in which said information is recorded instead of the recording area when said information fails to be recorded in the recording area, and
• a plurality of control regions in which position information of the recording area having failed to record information and position information of the alternating area in which the information failed to be recorded is recorded instead of said recording area;
• recording means for recording the information in a predetermined information recording area of said optical recording medium;
• a reproducing means for reproducing said information which is recorded from said predetermined information recording area;
• a collating means for collating said information intended to be recorded with said reproduced information obtained by said reproducing means and judging that said information was not correctly recorded in said predetermined recording area;
• an alternating processing means for alternating processing to record said information in said alternating area by said recording means in a case it was judged that the information was not correctly recorded by said collating means;
• and
• a control region renewing means for renewing the contents of said control regions by said recording means, wherein the renewing is carried out by said alternating processing means;
• said control region renewing means repetitively recording information linking the position of the recording area having failed to record information and the position of the alternating area in which the information having failed to be recorded is recorded instead of said recording area in one or more of said control regions until the final linking position information linking the recording area having failed to record information and the position information of the alternating area in which the information having failed to be recorded is first successfully recorded, said control region renewing means then renewing the contents of the initially recorded control region with said final linking position information, wherein, if no final linking position information is obtained, the contents of the initially recorded control region is not renewed and error information is generated.