Abstract:
An optical disc apparatus has a structure including: a storage medium; a readout portion that reads out data from at least one Defect Management Area (DMA) or at least one group of the DMAs which is included in a Blu-ray Disc REwritable (BD-RE); a storing portion that stores one of the data which is read out by the readout portion, in the storage medium; an erasing portion that erases the data which is read out by the readout portion, from the at least one DMA or the at least one group of the DMAs; and a recording portion that records the data which is stored in the storage medium, in at least one DMA or at least one group of the DMAs which is included in BD-RE.

Description:
[0001]    This application is based on Japanese Patent Application No. 2006-334051 filed on Dec. 12, 2006, the contents of which are hereby incorporated by reference. 
       BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The present invention relates to an optical disc apparatus. 
         [0004]    2. Description of the Related Art 
         [0005]    Recently an optical disc having a larger recording capacity than a DVD and called as a Blu-ray Disc has appeared. There are some kinds of the Blu-ray Discs, and among them, there is a Blu-ray Disc Rewritable (BD-RE) which is characterized by phase-change recording and is rewritable. 
         [0006]    The BD-RE has areas which are called as a user data zone, and a Defect Management Area (DMA). In recording utilizing the BD-RE, user data is recorded in the user data zone and information and the like of recording state of the user data zone is recorded in the DMA. Further, it is possible to erase all the user data which are recorded in the user data zone, and it is possible to reuse all the user data zone. 
         [0007]    However, because the BD-RE has large recording capacity (for a single layer disc, three kinds of discs which have capacity of 23 G bytes, 25 G bytes, and 27 G bytes are defined in the standard specification, and when they are double layer discs they have two times more of them), very long time is taken when all the user data are erased. As a result, there is a conventional optical disc apparatus which has an operation mode called a high speed erasing mode. In the high speed erasing mode, the user data are not erased but the data which are recorded in the DMA are erased. An optical disc apparatus recognizes the high speed erased BD-RE as a blank disc because the data recorded in the DMA are erased. 
         [0008]    As for a conventional art which relates to the present invention, for example, an invention about initializing of floppy disk (registered trade mark) is disclosed in JP-A-H5-290514. 
         [0009]    However, in an optical disc apparatus of the conventional art as above described, there is a problem that there is no way when a user desires to make the user data remaining in the BD-RE without erased possible to be readout again after the high speed erasing process is performed. 
       SUMMARY OF THE INVENTION 
       [0010]    It is an object of the present invention to provide an optical disc apparatus that can make a user data possible to be read again when a user desires to make the user data possible to be read again even after a high speed erasing process is performed for a BD-RE. 
         [0011]    To attain the above described object an optical disc apparatus in accordance with the present invention has a structure including: a storage medium; a readout portion that reads out data from at least one Defect Management Area (DMA) or at least one group of the DMAs which is included in a Blu-ray Disc REwritable (BD-RE); a storing portion that stores one of the data which is read out by the readout portion, in the storage medium; an erasing portion that erases the data which is read out by the readout portion, from the at least one DMA or the at least one group of the DMAs; and a recording portion that records the data which is stored in the storage medium, in at least one DMA or at least one group of the DMAs which is included in BD-RE. 
         [0012]    By a structure like this, when a user desires to make the user data possible to be read again even after the high speed erasing process has been performed for a BD-RE, the data of the DMA can be recovered in the BD-RE and the user data is made possible to be read again. 
         [0013]    The optical disc apparatus in accordance with the present invention has a structure in that the storing portion stores latest recording date and hour information which is recorded on BD-RE and/or a Manufacturer&#39;s Identification (MID) code which is recorded on BD-RE, in the storage medium, and the recording portion switches whether the recording is performed or not in response to comparison result between latest recording date and hour information which is recorded on BD-RE and latest recording date and hour information which is stored in the storage medium, and/or a comparison result between MID code which is recorded on BD-RE and MID code which is stored in the storage medium, in the above described structure. 
         [0014]    By a structure like this, even when a disc is removed from the apparatus after the high speed erasing process, and another disc is loaded onto the apparatus, the disc can be excluded from an object of the recovery process. 
         [0015]    The optical disc apparatus in accordance with the present invention has a structure further including a confirming portion that confirms conformance of the data that is recorded in the DMA or in the group of the DMAs in which the recording is performed after the recording portion performs the recording, with the user data which is recorded in user data zone which is included in the BD-RE, in the above described structure. 
         [0016]    By a structure like this, user can confirm if the disc recovery process succeed or fail. 
         [0017]    The optical disc apparatus in accordance with the present invention has a structure in that in response to result whether or not respective data which are read out by the readout portion from a plurality of the DMAs or from a plurality of groups of the DMAs are same, the storage portion switches whether the storage is performed or not, and the erasing portion switches whether the erasing is performed or not, in the above described structure. 
         [0018]    By a structure like this, the high speed erasing process can be interrupted if there is a possibility that the data of the DMA is broken. 
         [0019]    To attain the above described object an optical disc apparatus in accordance with the present invention has a structure including: a readout portion that reads out data from at least one Defect Management Area (DMA) or at least one group of the DMAs which is included in a Blu-ray Disc REwritable (BD-RE); a first recording portion that records one of the data which is read out by the readout portion, in a prescribed zone which is included in the BD-RE; an erasing portion that erases the data which is read out by the readout portion, from the at least one DMA or the at least one group of the DMAs; and a second recording portion that records data which is recorded in the prescribe zone, in at least one DMA or at least one group of the DMAs which is included in BD-RE. 
         [0020]    By a structure like this too, when a user desires to make the user data possible to be read again even after the high speed erasing process has been performed for a BD-RE, the data of the DMA can be recovered in the BD-RE and the user data is made possible to be read again. 
         [0021]    The optical disc apparatus in accordance with the present invention has a structure in that the first recording portion records drive specific information and/or latest recording date and hour information which is recorded on the BD-RE, in the prescribed zone, and the second recording portion switches whether the recording is performed or not in response to result whether drive specific information which is recorded in the prescribed zone designates one of prescribed drives and/or in response to comparison result between latest recording date and hour information which is recorded on BD-RE and latest recording date and hour information which is recorded in the prescribed zone, in the above described structure. 
         [0022]    By a structure like this, a disc which has been processed by an optical disc apparatus that is not compatible or a disc on which the user data is newly recorded after the high speed erasing process, can be excluded from the object of the recovery process. 
         [0023]    The optical disc apparatus in accordance with the present invention has a structure further including a confirming portion that confirms conformance of the data that is recorded in the DMA or in the group of the DMAs in which the recording is performed after the second recording portion performs the recording, with the user data which is recorded in user data zone which is included in the BD-RE, in the above described structure. 
         [0024]    By a structure like this, user can confirm if the disc recovery process succeed or fail. 
         [0025]    The optical disc apparatus in accordance with the present invention has a structure in that in response to result whether or not respective data which are read out by the readout portion from a plurality of the DMAs or from a plurality of groups of the DMAs are same, the first recording portion switches whether the recording is performed or not, and the erasing portion switches whether the erasing is performed or not, in the above described structure. 
         [0026]    By a structure like this, the high speed erasing process can be interrupted if there is a possibility that the data of the DMA is broken. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0027]      FIG. 1  is a block diagram of an optical disc apparatus according to the present invention. 
           [0028]      FIG. 2  is a structural diagram of a lead-in zone which is included in a single layer disc of a BD-RE. 
           [0029]      FIG. 3  is a structural diagram of a lead-out zone which is included in a single layer disc of a BD-RE. 
           [0030]      FIG. 4  is a structural diagram of a single layer disc of a BD-RE and a double layer disc of a BD-RE. 
           [0031]      FIG. 5A  is a flowchart of a first embodiment of a high speed erasing process according to the present invention. 
           [0032]      FIG. 5B  is a flowchart of a first embodiment of a high speed erasing process according to the present invention. 
           [0033]      FIG. 6A  is a flowchart of a first embodiment of a disc recovery process according to the present invention. 
           [0034]      FIG. 6B  is a flowchart of a first embodiment of a disc recovery process according to the present invention. 
           [0035]      FIG. 7A  is a flowchart of a second embodiment of a high speed erasing process according to the present invention. 
           [0036]      FIG. 7B  is a flowchart of a second embodiment of a high speed erasing process according to the present invention. 
           [0037]      FIG. 8A  is a flowchart of a second embodiment of a disc recovery process according to the present invention. 
           [0038]      FIG. 8B  is a flowchart of a second embodiment of a disc recovery process according to the present invention. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0039]    Hereinafter, embodiments of the present invention will be described with reference to the accompanied drawings. 
         [0040]    In  FIG. 1 , a block diagram of an optical disc apparatus according to the present invention is shown. The optical disc apparatus according to the present invention is equipped with a tuner  2 , a disc recording and reproducing portion  3 , an audio video compression and decompression portion  4 , a control portion  5 , an OSD portion  6 , a video output portion  7 , an audio output portion  8 , a RAM  9 , and a remote control command receiving portion  10 . An antenna  1  is connected to the tuner  2 , and a television or the like is connected to the video output portion  7  and the audio output portion  8 . 
         [0041]    The antenna  1  converts a radio wave signal into a high frequency signal to output it to the tuner  2 . The tuner  2  extracts a high frequency signal of a channel corresponding to tuning control of the control portion  5  from the high frequency signal of the antenna  1  to output a video signal and an audio signal to the audio video compression and decompression portion  4 . The audio video compression and decompression portion  4  compresses the video signal and the audio signal from the tuner  2  to output them to the disc recording and reproducing portion  3 , and decompresses the video signal and the audio signal from the disc recording and reproducing portion  3  to output the video signal to the OSD portion  6  and the audio signal to the audio output portion  8 . 
         [0042]    The disc recording and reproducing portion  3  performs reading out data from, recording data to, and erasing data from, a disc which is loaded. The OSD portion  6  generates a graphic and character signal by a command from the control portion  5  and combine the graphic and character signal with the video signal from the audio video compression and decompression portion  4  to output the combined signal to the video output portion  7 . Further, the OSD portion  6  sometimes outputs the graphic and character signal to the video output portion  7  without performing the combination described above. The video output portion  7  converts the combined signal and the graphic and character signal from the OSD portion  6  into a video signal to output them to the television or the like. The audio output portion  8  converts the audio signal from the audio video compression and decompression portion  4  into an analog signal to output it to the television or the like. The remote control command receiving portion  10  receives an infrared signal from a remote controller  11  to output a coded signal to the control portion  5 . 
       First Embodiment 
       [0043]    Next, a first embodiment of high speed erasing process by the optical disc apparatus which is structured as above according to the present invention will be explained with reference to a flow chart shown in  FIG. 5A  and  FIG. 5B . 
         [0044]    When an operation to start the high speed erasing process is performed in the remote controller  11 , the control portion  5  receives a coded signal from the remote control command receiving portion  10 , the control portion  5  confirms a disc kind information which is stored in the RAM  9  in step S 10 . The disc kind information is information of the disc kind which the control portion  5  recognizes and stores in the RAM  9  when a disc is loaded into the disc recording and reproducing portion  3 . In case where the disc kind information designates a single layer disc of a BD-RE, the process proceeds to step S 20 . 
         [0045]      FIG. 2  shows a structure of lead-in zone which is included in the single layer disc of BD-RE, and  FIG. 3  shows a structure of lead-out zone which is included in the single layer disc of BD-RE. As shown in upper part of  FIG. 4 , the lead-in zone, user data zone, and the lead-out zone are arranged on a disc from inner side to outer side. User data is recorded in the user data zone. The lead-in zone has DMA 1  and DMA 2  which are two Defect Management Areas (DMAs), and the lead-out zone has DMA 3  and DMA 4  which are two DMAs. The DMA records information of recording state of the user data zone and the like. There are cases where only DMA 1  is used and where a plurality of DMAs including DMA 1  are used (for example, all of DMA 1  to DMA 4  are used, or the like). In case where the plurality of DMAs including DMA 1  are used, same data are recorded in each of the DMAs. The latest date and time information (latest recording date and hour information) when the user data is recorded lastly is also recorded on the disc. 
         [0046]    In step S 20 , by an instruction from the control portion  5  the disc recording and reproducing portion  3  performs data reading out process sequentially from the DMA 1 , DMA 2 , DMA 3 , and DMA 4 . In case where the data is recorded only in the DMA 1 , the process proceeds to step S 40  which will be described later. In case where the data are recorded in a plurality of DMAs including DMA 1 , the process proceeds to step S 30 . 
         [0047]    In step S 30 , the control portion  5  judges whether the data which are read from the respective DMAs are the same or not. When they are not the same (N in step S 30 ), there is a possibility that the data recorded in the DMAs are broken, therefore, the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc is not correct and the high speed erasing process is interrupted. In step S 30 , in case where the data which are read out from the respective DMAs are judged to be the same (Y in step S 30 ), the process proceeds to step S 40 . 
         [0048]    In step S 40 , the control portion  5  adds a header information at a head of the data which is read out from the DMA 1  to store the data in the RAM  9  as a save information. At this point the header information is the latest recording date and hour information and Manufacturer&#39;s Identification (MID) code which are recorded on the disc, and in addition, DMA use pattern information. The DMA use pattern information is information which designates the DMA that is used. 
         [0049]    In step S 50 , by an instruction from the control portion  5  the disc recording and reproducing portion  3  erases the data which is read out in step S 20  from the DMA. In case where only the DMA 1  is used, the data is erased only from the DMA 1 , and in case where the plurality of DMAs including the DMA 1  are used, the data are erased from the respective DMAs. The high speed erasing process is completed and the disc becomes a state which is equivalent to a blank disc. 
         [0050]    In the above described step S 10 , in case where the disc kind information designates a double layer disc of a BD-RE, the process proceeds to step S 60  ( FIG. 5B ). 
         [0051]    In lower part of  FIG. 4 , a structure of the double layer disc of BD-RE is shown. A lead-in zone, a user data zone, and an outer zone are arranged from inner side to outer side on the first layer of a disc. The lead-in zone is structured as shown in  FIG. 2  and has the DMA 1  and the DMA 2 . The outer zone is structured as shown in  FIG. 3  and has the DMA 3  and the DMA 4 . Further on the second layer of the disc, the lead-out zone, the user data zone, and the outer zone are arranged from the inner side to the outer side. The lead-out zone is structured substantially as shown in  FIG. 2  and has the DMA 1  and the DMA 2 . The outer zone is structured as shown in  FIG. 3  and has the DMA 3  and the DMA 4 . The DMA 1  on the first layer and the DMA 1  on the second layer are used as a group and the DMA 2 , DMA 3 , and DMA 4  are used similarly. There are a case where only the group of DMA 1  are used and a case where a plurality of groups of DMAs including the group of DMA 1  are used. In case where the plurality of groups of DMAs including the group of DMA 1  are used, same data are recorded in the respective groups of DMAs. In addition, the latest recording date and hour information is also recorded on the disc. 
         [0052]    In step S 60  by an instruction from the control portion  5 , the disc recording and reproducing portion  3  performs data reading process sequentially from the group of DMA 1 , the group of DMA 2 , the group of DMA 3 , and the group of DMA 4 . In case where the data are recorded only in the group of DMA 1 , the process proceeds to step S 80  which will be described later. In case where the data are recorded in the groups of the plurality of DMAs including the group of DMA 1 , the process proceeds to step S 70 . 
         [0053]    In step S 70 , the control portion  5  judges whether the data which are read from the respective groups of DMAs are the same or not. When they are not the same (N in step S 70 ), there is a possibility that the data recorded in the groups of DMAs are broken, therefore, the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc is not correct and the high speed erasing process is interrupted. In case where the data which are read out from the respective groups of DMAs are judged to be the same in step S 70  (Y in step S 70 ), the process proceeds to step S 80 . 
         [0054]    In step S 80 , the control portion  5  adds a header information at a head of the data which are read out from the group of DMA 1  to store the data in the RAM  9  as a save information. At this point the header information is the latest recording date and hour information and MID code which are recorded on the disc, and in addition, DMA use pattern information. The DMA use pattern information is information which designates the group of DMAs that are used. 
         [0055]    In step S 90 , by an instruction from the control portion  5  the disc recording and reproducing portion  3  erases the data which are read out in step S 60  from the groups of DMAs. In case where only the group of DMA 1  are used, the data are erased only from the group of DMA 1 , and in case where a plurality of groups of DMAs including the group of DMA 1  are used, the data are erased from the respective groups of DMAs. The high speed erasing process is completed and the disc becomes a state which is equivalent to the blank disc. 
         [0056]    Next, a first embodiment of disc recovery process by the optical disc apparatus according to the present invention will be explained with reference to a flow chart shown in  FIG. 6A  and  FIG. 6B . 
         [0057]    When an operation to start the disc recovery process is performed in the remote controller  11  and the control portion  5  receives a coded signal from the remote control command receiving portion  10 , the control portion  5  confirms whether the header information and the save information are stored in the RAM  9  or not in step S 100 . In case where they are not stored (N in step S 100 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. In step S 100 , when the header information and the save information are confirmed to be stored in the RAM  9  (Y in step S 100 ), the process proceeds to step S 110 . 
         [0058]    In step S 110 , the control portion  5  confirms the disc kind information which is stored in the RAM  9 , and in case where the disc kind information designates a single layer disc of a BD-RE, the process proceeds to step S 120 . 
         [0059]    In step S 120 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the above described erasure target data is recorded in any one of the DMA 1  to DMA 4  which is included in the disc or not. In case where it is recorded (Y in step S 120 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step it becomes possible to exclude any disc on which the user data is newly recorded after the high speed erasing process from an object of the recovery process. In case where the above described erasure target data is not recorded in any of the DMA 1  to DMA 4  in step S 120  (N in step S 120 ), the process proceeds to step S 130 . 
         [0060]    In step S 130 , the control portion  5  confirms whether the latest recording date and hour information which is read out from the disc by the disc recording and reproducing portion  3  agrees with the latest recording date and hour information which is stored in the RAM  9 , and the MID code which is read out from the disc by the disc recording and reproducing portion  3  agrees with the MID code which is stored in the RAM  9 , or not. In case where any of the latest recording date and hour information and the MID code does not agree (N in step S 130 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step even when a disc is removed from the apparatus after the high speed erasing process, and another disc on which the high speed erasing process is performed is loaded onto the apparatus, the disc can be excluded from the object of the recovery process. In step S 130  in case where both of the latest recording date and hour information and the MID code agree (Y in step S 130 ), the process proceeds to step S 140 . 
         [0061]    In step S 140 , by an instruction from the control portion  5 , the disc recording and reproducing portion  3  records the save information which is stored in the RAM  9 , in the DMA that is included in the disc in response to the DMA use pattern information that is stored in the RAM  9 . For example, when the DMA use pattern information designates only the DMA 1 , the save information is recorded only in the DMA 1  included in the disc. When the DMA use pattern information designates the DMA 1  to DMA 4 , the save information is recorded in the DMA 1  to DMA 4  included in the disc. 
         [0062]    Then in step S 150 , the control portion  5  deletes the header information and the save information which are stored in RAM  9 . 
         [0063]    In step S 160 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms conformance of the data which is recorded in all the DMAs that are included in the disc and are used, with the user data which is recorded in the user data zone that are included in the disc. In case where the conformance is not satisfied for any of the DMAs that are used (N in step S 160 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process fails. In case where the conformance is satisfied for all the DMAs that are used (Y in step S 160 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process succeeds. 
         [0064]    In step S 110  described above, in case where the disc kind information designates the double layer disc of BD-RE, the process proceeds to step S 170  ( FIG. 6B ). 
         [0065]    In step S 170 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the above described erasure target data is recorded in any of the groups of DMA 1  to DMA 4  that are included in the disc, or not. In case where the data is recorded (Y in step S 170 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step it becomes possible to exclude any disc on which user data is newly recorded after the high speed erasing process from an object of the recovery process. Further in step S 170 , in case where above described erasure target data is not recorded in any of groups of the DMA 1  to DMA 4  (N in step S 170 ), the process proceeds to step S 180 . 
         [0066]    In step S 180 , the control portion  5  confirms whether the latest recording date and hour information which is read out from the disc by the disc recording and reproducing portion  3  agrees with the latest recording date and hour information which is stored in the RAM  9 , and the MID code which is read out from the disc by the disc recording and reproducing portion  3  agrees with the MID code which is stored in the RAM  9 , or not. In case where any of the latest recording date and hour information and the MID code does not agree (N in step S 180 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step even when a disc is removed from the apparatus after the high speed erasing process, and another disc on which the high speed erasing process is performed is loaded onto the apparatus, the disc can be excluded from the object of the recovery process. In step S 180  in case where both of the latest recording date and hour information and the MID code agree (Y in step S 180 ), the process proceeds to step S 190 . 
         [0067]    In step S 190 , by an instruction from the control portion  5 , the disc recording and reproducing portion  3  records the save information which is stored in the RAM  9 , in the group of DMAs that are included in the disc in response to the DMA use pattern information that is stored in the RAM  9 . For example, when the DMA use pattern information designates only the group of DMA 1 , the save information is recorded only in the group of DMA 1  that are included in the disc. When the DMA use pattern information designates the groups of DMA 1  to DMA 4 , the save information is recorded in the group of DMA 1  to DMA 4  that are included in the disc. 
         [0068]    Then in step S 200 , the control portion  5  deletes the header information and the save information which are stored in RAM  9 . 
         [0069]    In step S 210 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms conformance of the data which is recorded in all the groups of DMAs that are included in the disc and are used, with the user data which is recorded in the user data zone that are included in the disc. In case where the conformance is not satisfied for any of the groups of DMAs that are used (N in step S 210 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process fails. In case where the conformance is satisfied for all the groups of DMAs that are used (Y in step S 210 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process succeeds. 
         [0070]    As above described according to the present embodiment, it becomes possible to make the user data possible to be read again by recovering the data of DMA saved in the RAM into the disc, when a user desires to make the user data possible to be read again even after the high speed erasing process is performed for a BD-RE and the disc is in a state which is equivalent to a blank disc. 
         [0071]    In the above described first embodiment of the high speed erasing process, the latest recording date and hour information and the MID code are stored in the RAM  9  as the header information in step S 40  and step S 80 , the control portion  5  may generate a specific Identification Data (ID) based on the latest recording date and hour information and the MID code which are recorded on the disc and store the specific ID in the RAM  9  as the header information. In such case, in the above described first embodiment of the disc recovery process, the control portion  5  may generate a specific ID based on the latest recording date and hour information and the MID code which are recorded on the disc and confirm whether the generated specific ID agrees with the specific ID which is stored in the RAM  9  in step S 130  and step S 180 . At this time if the respective specific IDs agree with each other, the process proceeds to step S 140  or step S 190 . In case where the respective specific IDs do not agree with each other, the process may display that the disc recovery process cannot be performed. By these steps too, even when a disc is removed from the apparatus after the high speed erasing process, and another disc on which the high speed erasing process is performed is loaded onto the apparatus, the disc can be excluded from the object of the recovery process. 
         [0072]    In the above described first embodiment of the high speed erasing process, only the DMA use pattern information may be used as the header information in step S 40  and step S 80 . In the above described first embodiment of the disc recovery process step S 130  and step S 180  may be omitted, if N is specified in step S 120  then the process may proceed to step S 140 , and if N is specified in step S 170  then the process may proceed to step S 190 . In such case, when a disc eject button which is included in the disc recording and reproducing portion  3 , is pushed, and the disc recording and reproducing portion  3  ejects the loaded disc, the control portion  5  may delete the header information and the save information which are stored in the RAM  9 . By these steps, even when a disc is removed from the apparatus after the high speed erasing process, and another disc is loaded onto the apparatus and the disc recovery process is started, because the header information and the save information are not stored in the RAM  9 , a statement that the disc recovery process cannot be performed is displayed by judgment in step S 100  and the above described another disc can be excluded from the object of the recovery process. 
         [0073]    In addition, in the above described embodiment, the storage unit for the header information and the save information may be a hard disk or the like which is included in a hard disk drive other than the RAM. 
       Second Embodiment 
       [0074]    Next, hereinafter, a second embodiment of high speed erasing process by the optical disc apparatus according to the present invention will be explained with reference to a flow chart shown in  FIG. 7A  and  FIG. 7B . 
         [0075]    Because the process is same as the process shown in  FIG. 5A  and  FIG. 5B  of the above described first embodiment other than step S 250  and step S 290  in  FIG. 7A  and  FIG. 7B , detailed explanation is omitted. Hereinafter step S 250  and step S 290  will be explained. 
         [0076]    In step S 250 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  adds a header information at a head of the data which is read out from the DMA 1  to record the data in a Reserved zone (for example, Reserved  3 ,  2 ,  1  shown in  FIG. 2 ) which is included in the disc as a save information. At this point the header information is drive specific information, the latest recording date and hour information which is recorded on the disc, and in addition, a DMA use pattern information. 
         [0077]    Further, in step S 290 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  adds the header information at a head of the data which are read out from the group of DMA 1  to record the data in the Reserved zone (for example, Reserved  3 ,  2 ,  1  shown in  FIG. 2 ) which is included in the disc as a save information. At this point the header information is the drive specific information, the latest recording date and hour information which is recorded on the disc, and in addition, the DMA use pattern information. 
         [0078]    Next, hereinafter, a second embodiment of the disc recovery process by the optical disc apparatus according to the present invention will be explained with reference to a flow chart shown in  FIG. 8A  and  FIG. 8B . 
         [0079]    When an operation to start the disc recovery process is performed in the remote controller  11  and the control portion  5  receives a coded signal from the remote control command receiving portion  10 , the control portion  5  confirms the disc kind information which is stored in the RAM  9  in step S 310 . In case where the disc kind information designates a single layer disc of a BD-RE, the process proceeds to step S 320 . 
         [0080]    In step S 320 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the header information and the save information are recorded in the Reserved zone which is included in the disc, or not. In case where any of the header information and the save information is not recorded (N in step S 320 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. In case where the header information and the save information are recorded in the Reserved zone in step S 320  (Y in step S 320 ), the process proceeds to step S 330 . 
         [0081]    In step S 330 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the erasure target data is recorded in any one of the DMA 1  to DMA 4  which is included in the disc, or not. In case where it is recorded (Y in step S 330 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step it becomes possible to exclude any disc on which the user data is newly recorded after the high speed erasing process from an object of the recovery process. In case where the erasure target data is not recorded in any of the DMA 1  to DMA 4  in step S 330  (N in step S 330 ), the process proceeds to step S 340 . 
         [0082]    In step S 340 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the drive specific information which is recorded in the Reserved zone that is included in the disc designates one of the prescribed drives, or not. If it does not designate any of the prescribed drives (N in step S 340 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step it becomes possible to exclude a disc which has been processed by an optical disc apparatus which is not compatible from an object of the recovery process. In step S 340  in case where the drive specific information designates one of the prescribed drives (Y in step S 340 ), the process proceeds to step S 350 . 
         [0083]    In step S 350 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the latest recording date and hour information which is recorded in the Reserved zone that is included in the disc agrees with the latest recording date and hour information which is recorded in the disk when the user data is recorded, or not. In case where they do not agree (N in step S 350 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step a disc can be excluded from the object of the recovery process even when the high speed erasing process is performed on the disc by the optical disc apparatus according to the present invention then another optical disc apparatus newly records user data and performs the high speed erasing process on the disc. In step S 350  in case where each of the latest recording date and hour information agrees (Y in step S 350 ), the process proceeds to step S 360 . 
         [0084]    In step S 360 , by an instruction from the control portion  5 , the disc recording and reproducing portion  3  records the save information which is recorded in the Reserved zone, in the DMA that is included in the disc in response to the DMA use pattern information that is recorded in the Reserved zone. For example, in case where the DMA use pattern information designates only the DMA 1 , the save information is recorded only in the DMA 1  included in the disc. In case where the DMA use pattern information designates the DMA 1  to DMA 4 , the save information is recorded in the DMA 1  to DMA 4  that are included in the disc. 
         [0085]    Then in step S 370 , the control portion  5  deletes the header information and the save information which are recorded in the Reserved zone utilizing the disc recording and reproducing portion  3 . 
         [0086]    In step S 380 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms conformance of the data which are recorded in all the DMAs that are included in the disc and are used, with the user data which is recorded in the user data zone that is included in the disc. In case where the conformance is not satisfied for any of the DMAs that are used (N in step S 380 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process fails. In case where the conformance is satisfied for all the DMAs that are used (Y in step S 380 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process succeeds. 
         [0087]    In step S 310  described above, in case where the disc kind information designates the double layer disc of BD-RE, the process proceeds to step S 390  ( FIG. 8B ). 
         [0088]    In step S 390 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the header information and the save information are recorded in the Reserved zone that are included in the disc, or not. In case where any of the header information and the save information is not recorded (N in step S 390 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. Further in step S 390 , in case where the header information and the save information are recorded in the Reserved zone (Y in step S 390 ), the process proceeds to step S 400 . 
         [0089]    In step S 400 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the erasure target data is recorded in any of the groups of DMA 1  to DMA 4  that are included in the disc, or not. In case where the data is recorded (Y in step S 400 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step it becomes possible to exclude any disc on which the user data is newly recorded after the high speed erasing process from an object of the recovery process. Further in step S 400 , in case where the erasure target data is not recorded in any of the groups DMA 1  to DMA 4  (N in step S 400 ), the process proceeds to step S 410 . 
         [0090]    In step S 410 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the drive specific information which is recorded in the Reserved zone that is included in the disc designates one of the prescribed drives, or not. If it does not designate any of the prescribed drives (N in step S 410 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step it becomes possible to exclude a disc which is processed by an optical disc apparatus which is not compatible, from an object of the recovery process. In step S 410  in case where the drive specific information designates one of the prescribed drives (Y in step S 410 ), the process proceeds to step S 420 . 
         [0091]    In step S 420 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the latest recording date and hour information which is recorded in the Reserved zone that is included in the disc agrees with the latest recording date and hour information which is recorded in the disk when the user data is recorded, or not. In case where they do not agree (N in step S 420 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the disc recovery process cannot be performed and the disc recovery process is interrupted. By this step a disc can be excluded from the object of the recovery process even when the optical disc apparatus according to the present invention performs the high speed erasing process on the disc then another optical disc apparatus records newly user data then performs the high speed erasing process on the disc. In step S 420  in case where each of the latest recording date and hour information agrees (Y in step S 420 ), the process proceeds to step S 430 . 
         [0092]    In step S 430 , by an instruction from the control portion  5 , the disc recording and reproducing portion  3  records the save information which is recorded in the Reserved zone, in the group of DMAs that are included in the disc in response to the DMA use pattern information that is recorded in the Reserved zone. For example, in case where the DMA use pattern information designates only the group of DMA 1 , the save information is recorded only in the group of DMA 1  included in the disc. In case where the DMA use pattern information designates the groups of DMA 1  to DMA 4 , the save information is recorded in the groups of DMA 1  to DMA 4  included in the disc. 
         [0093]    Then in step S 440 , the control portion  5  deletes the header information and the save information which are recorded in the Reserved zone utilizing the disc recording and reproducing portion  3 . 
         [0094]    In step S 450 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms conformance of the data which is recorded in all the groups of DMAs that are included in the disc and are used with the user data which is recorded in the user data zone that are included in the disc. In case where the conformance is not satisfied for any of the group of DMAs that are used (N in step S 450 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process fails. In case where the conformance is satisfied for all the groups of DMAs that are used (Y in step S 450 ), the control portion  5  makes an instruction for the OSD portion  6  to generate the graphic and character signal to display on a television or the like that the recovery process succeeds. 
         [0095]    As above described according to the present embodiment, it becomes possible to make the user data possible to be read again by recovering the data of DMA saved in the Reserved zone included in the disc into the disc, when a user desires to make the user data possible to be read again even after the high speed erasing process is performed for a BD-RE and the disc is in a state which is equivalent to a blank disc. 
         [0096]    In the optical disc apparatus which performs the high speed erasing process and the disc recovery process according to the above described second embodiment, when the operation to start the user data recording is performed in the remote controller  11 , by utilizing the disc recording and reproducing portion  3 , the control portion  5  confirms whether the header information and the save information are recorded in the Reserved zone which is included in the disc, or not. If they are recorded, these informations become useless after the user data is recorded, therefore, it is preferable that the header information and the save information which are recorded in the Reserved zone are deleted by the disc recording and reproducing portion  3 , then the user data is recorded on the disc.