JP2013242935A - Optical disk recording and reproducing device and recording and reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk recording and reproducing device which can perform data recording and reproducing for a double-sided optical disk at high speed, and a recording and reproducing method therefor.SOLUTION: When the number of drives recording and reproducing one plane of a double-sided optical disk and the number of drives recording and reproducing the other plane are made different from each other, and data with the capacity of two or more planes are recorded and reproduced, depending on a data amount subjected to recording and reproducing, switching between both planes, only one plane, or only the other plane is done, to cause the drive to perform parallel recording and reproducing operation.

Description

  The present invention relates to an optical disc recording / reproducing apparatus and an operation method thereof, and more particularly to a technique effective for recording / reproducing a double-sided optical disc.

  A library device has been developed that records and reproduces a plurality of double-sided optical discs with a plurality of single-sided optical disc recording and reproducing units.

  In Patent Document 1, in a double-sided optical disc file device, a player unit for the first side and a player unit for the second side are provided as a pair, and the player unit for the first side and the player unit for the second side according to the surface to be recorded and reproduced. Recording and reproduction of a plurality of double-sided optical disks are performed by exchanging the optical disks in the player unit.

JP-A-1-173467

  However, in Patent Document 1, since the player unit for the first surface and the player unit for the second surface are provided as a pair, the number of player units for the first surface is equal to the number of player units for the second surface. The number of data that can be recorded / reproduced in parallel on only the same side of the double-sided optical disk is limited to half the number of player units. In this case, recording / reproducing data over more than half of the number of player units involves replacement of the optical disc in the player unit, so high-speed data recording / reproducing cannot be performed. Further, when parallel recording / reproduction is not performed only on the same side surface of the double-sided optical disc, management of the recording / reproduction surface becomes complicated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical disc recording / reproducing apparatus capable of recording / reproducing data on a double-sided optical disc at high speed and a recording / reproducing method thereof.

In order to solve the above-described problems, the present invention uses the configuration described in the claims as an example.

  According to the present invention, it is possible to perform data recording / reproduction of a double-sided optical disk at a high speed with a single-sided optical disk drive device.

FIG. 1 is a diagram showing an example of the configuration of an optical disc recording / reproducing apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of an address table format according to an embodiment of the present invention. FIG. 3 is a diagram showing an example of the format of the recording state table according to the embodiment of the present invention. FIG. 4 is a diagram showing an overview example of the picker unit of the optical disc recording / reproducing apparatus according to the embodiment of the present invention. FIG. 5 is a diagram showing an overview example of the A-side drive of the optical disc recording / reproducing apparatus according to the embodiment of the present invention. FIG. 6 is a diagram showing an example of an overview of the B-side drive of the optical disc recording / reproducing apparatus according to the embodiment of the present invention. FIG. 7 is a diagram showing an example of the positional relationship between the picker unit and the drive of the optical disc recording / reproducing apparatus according to the embodiment of the present invention. FIG. 8 is a diagram showing an example of the configuration of the drive of the optical disc recording / reproducing apparatus according to the embodiment of the present invention. FIG. 9 is a diagram showing an example of a recording flow of the optical disc recording / reproducing apparatus according to the first embodiment of the present invention. FIG. 10 is a diagram showing a reproduction flow example of the optical disk recording / reproducing apparatus according to the first embodiment of the present invention. FIG. 11 is a diagram showing a flow example of disc storage determination processing in the reproduction flow of the optical disc recording / reproducing apparatus according to Embodiment 1 of the present invention. FIG. 12 is a diagram showing an example of a recording flow of the optical disc recording / reproducing apparatus according to the second embodiment of the present invention. FIG. 13 is a diagram showing an example of a double-sided recording process flow of the optical disc recording / reproducing apparatus according to the third embodiment of the present invention. FIG. 14 is a diagram showing a flow example of the recording mode determination process in the double-sided recording process flow of the optical disc recording / reproducing apparatus according to the third embodiment of the present invention.

  First, Example 1 will be described with reference to FIGS. FIG. 1 is a configuration example of an optical disk recording / reproducing apparatus as an embodiment of the present invention. Hereinafter, a double-sided optical disc is simply referred to as an optical disc unless otherwise specified. In this embodiment, the case of a write-once optical disk will be described. In the following description, the front and back surfaces of the optical disc will be referred to as A side and B side for explanation. In the following description, it is assumed that the recording capacities (sizes) per side of the optical disc recorded and reproduced by the optical disc recording / reproducing apparatus as the embodiment of the present invention are equal.

  The optical disk recording / reproducing apparatus 1 according to the present invention records or reproduces an optical disk in response to a recording or reproduction request from a request source such as a personal computer or a server (not shown) connected to the network 2. The optical disc recording / reproducing apparatus 1 includes an interface unit 11 that exchanges data with the request source via the network 2, a control unit 12 that controls each unit in the optical disc recording / reproducing device 1, a memory unit 13 that stores various data, A picker unit 15 that moves the picker unit 15, a picker unit 15 that temporarily stores the optical disk and moves under the control of the transport unit 14 to transfer the optical disk to and from the A-side drive 16, B-side drive 17 and storage unit 18. The A-side drive 16 and the B-side drive 17 perform recording and reproduction on one side of the optical disc, and the storage unit 18 for storing a plurality of the optical discs. The storage unit 18 is partitioned inside, and the optical disk is fixed by each partition. Hereinafter, a space in which the optical disk is fixed is referred to as a slot. The slot is not limited to the above structure as long as the optical disk stored in a steady state is in a stationary state. Each slot is provided with a mechanism for ejecting the optical disk stored in the slot, and ejects the optical disk upon receiving a medium ejection request command from the control unit 12. Further, a mechanism for storing the optical disk in the slot is provided, and when the optical disk is inserted partway into the slot, the optical disk is operated to be stored in the slot. The mechanism of the storage unit 18 is not limited to the above-described mode. For example, the storage unit 18 may be a mechanism for storing and discharging by a tray method. The storage unit 18 includes only the optical disk discharge mechanism, and the picker unit 15 side. A mechanism for storing the optical disk in the storage unit 18 may be provided, and various modifications are included.

  The memory unit 13 stores table data (hereinafter referred to as an address table) for managing the correspondence between logical addresses and physical addresses. The address table is read / written and managed by the control unit 12.

  FIG. 2 shows an example of the field format of the address table in the embodiment of the present invention. The address table is a list of a head logical address 1310 corresponding to the logical address and optical disc identification information 1311 and surface information 1312 corresponding to the physical address as a set. The head logical address 1310 corresponds to the head address of one side of the optical disk. The optical disc identification information 1311 is information that can uniquely identify the optical disc in the storage unit 18. The surface information 1312 is information for identifying the A surface or B surface of the optical disc. The address table is a list of recorded areas. Note that there is one set of the head logical address 1310, the optical disc identification information 1311, and the surface information 1312 for one surface of the optical disk. That is, only one set of data relating to one surface of the optical disc is stored in the address table.

  The memory unit 13 stores table data (hereinafter, a recording state table) for managing the correspondence between the physical address area and the recording state of the area. The recording state table is read / written and managed by the control unit 12.

  FIG. 3 shows an example of the field format of the recording status table in the embodiment of the present invention. The recording status table is a list of optical disc identification information 1320 and surface information 1321 corresponding to the physical address, and recording status information 1322 indicating whether recording has been performed or not. The optical disc identification information 1320 is information that can uniquely identify the optical disc in the storage unit 18. The surface information 1321 is information for identifying the A surface or B surface of the optical disc. The optical disks listed in the recording state table are all the optical disks stored in the storage unit 18.

  Although the optical disc recording / reproducing apparatus 1 receives a recording or reproduction request from the request source connected to the network 2, the recording or reproduction request source is not limited to this. For example, a host computer connected to the optical disc recording / reproducing apparatus 1 on a one-to-one basis may be used.

  FIG. 4 is an example of an overview of the picker unit 15 included in the optical disc recording / reproducing apparatus 1. The picker unit 15 has a slot-type medium insertion / ejection port, and the optical disc is inserted and ejected through the medium insertion / ejection port to temporarily store the optical disc.

  FIG. 5 is an example of an overview of the A-side drive 16 of the optical disc recording / reproducing apparatus 1. The A-side drive 16 is a generic name for the drives A1 to AM, and each of the drives A1 to AM has a slot-type medium insertion / ejection port and performs recording and reproduction on one side of one optical disc. The optical disk to be recorded and reproduced by the A-side drive 16 can be exchanged via the picker unit 15, and recording is performed on one side of all the optical disks stored in the storage unit 18 by exchanging the optical disk. And playback is possible.

  FIG. 6 is an example of an overview of the B-side drive 17 included in the optical disc recording / reproducing apparatus 1. The B-side drive 17 is a generic name for the drives B1 to BN, and each of the drives B1 to BN has a slot-type medium insertion / ejection port, and performs recording and reproduction on one side of one optical disc. However, recording and reproduction are performed on the surface opposite to the surface on which the A-side drive 16 records and reproduces. The optical disk to be recorded and reproduced by the B-side drive 17 can be exchanged through the picker unit 15, and recording and recording on one side of all the optical disks stored in the storage unit 18 by exchanging the optical disk. Playback is possible.

  In this embodiment and the following embodiments, the number M of the A-side drives 16 is greater than the number N of the B-side drives 17.

  FIG. 7 shows a drive L (L is one of A1 to AM or B1 to BN) among the picker unit 15 and the A-side drive 16 or the B-side drive 17 which is performed when the optical disc is replaced. ) Shows an example of the positional relationship between the picker unit 15 and the drive L when the optical disk is transferred. The medium insertion / ejection port of the picker unit 15 and the medium insertion / ejection port of the drive L face each other, and the surfaces on which the medium insertion / ejection ports are located are separated by a distance d. In the slot-type medium insertion / ejection, the distance d is determined based on the positional relationship between the medium position when one ejects the medium and the medium position where the other detects that the medium is inserted.

  FIG. 8 shows an arbitrary one of the A-side drive 16 and the B-side drive 17 (in the following description, it is expressed as drive Q. Q is one of A1 to AM or B1 to BN). ) Is a configuration example. The drive Q performs a code process at the time of recording, a spindle motor 161 that rotationally drives the optical disk 3, an optical pickup 162, a decode circuit 163 that performs a decoding process at the time of reproducing the optical disk 3, a memory 164 that is a storage means The encoder circuit 165 includes an interface circuit 166 that receives commands and data of the control unit 12, and a microcomputer 167 that controls the entire drive L.

  The optical pickup 162 receives the optical pickup control signal S02 from the microcomputer 167, moves in the radial direction of the optical disc 3 and moves to a recording or reproducing position, and indicates the focus of the laser beam by the optical pickup control signal S02. The optical disk 3 is irradiated with laser light for recording or reproduction in accordance with the position. The irradiated laser light is reflected by the optical disc 3, and a light receiving unit (not shown) included in the optical pickup 162 receives the reflected light. The light receiving unit converts the reflected light into an electric signal S03 and outputs it to the decoding circuit 163. During recording, the optical disc 3 is irradiated with laser light under the control of a recording control signal S06 input from an encoding circuit 165 described later.

  The spindle motor 161 receives motor rotation control from the microcomputer 167 by a motor control signal S01, and rotates the optical disc 3.

  The decoding circuit 163 performs analog signal processing such as amplification of the electrical signal S03 output from the optical pickup 162, digitization, binary data generation, and decoding, and stores the decoding result S04 in the memory 164.

  The microcomputer 167 controls each block in the drive Q. The microcomputer 167 is controlled by software. The microcomputer 167 outputs the optical pickup control signal S02 to the optical pickup 162 at the time of recording / reproduction, and controls the optical pickup to move to the recording / reproducing position by moving in the radial direction of the optical disc 3, thereby Control is performed so that the focus is adjusted, and control is performed so that one side of the optical disc 3 is irradiated with laser light for recording or reproduction. Further, the motor control signal S01 is output to the spindle motor 161 to perform motor rotation control, and the optical disk 3 is controlled to rotate. The microcomputer 167 reads / writes data from / to the memory unit 164 as appropriate. The number of the microcomputers 167 is not limited to one. For example, a circuit for performing servo control such as the motor control signal S01 and the optical pickup control signal S02 may be provided, and the servo control processing may be separated from the microcomputer 167. .

  The memory 164 is a storage means such as an SDRAM (Synchronous Dynamic Random Access Memory) or a flash memory, and stores data related to processing in the microcomputer 167.

  The interface circuit 166 communicates with the control unit 12 in accordance with various interface standards such as ATAPI, USB, and IEEE1394, receives commands and data, stores the commands and data in the memory 164 at the time of reception, and transmits them. Sometimes the data is transmitted to the control unit 12.

  The encoding means 165 reads out the recording data S05 from the memory 164, performs modulation processing, converts the data into binary data to be stored on the optical disc 3, and records the binary data on the optical disc 3. S06 is output to the optical pickup 162.

  FIG. 9 is an example of a processing flow at the time of recording in the optical disc recording / reproducing apparatus 1 as an embodiment of the present invention. Hereinafter, the recording processing operation of the optical disc recording / reproducing apparatus 1 will be described with reference to FIG.

  The request source transmits the recording request command data to the optical disc recording / reproducing apparatus 1 via the network 2. The recording request command data includes start address information, size information, and recording data of the recording data. The head address information is an address independent of the identification information of the optical disk on which the recording data is recorded. The optical disc recording / reproducing apparatus 1 receives the recording request command data at the interface unit 11, and the interface unit 11 transmits the recording request command data to the control unit 12. The control unit 12 starts recording upon receiving the recording request command data. In the following description of the present embodiment, the description will be made assuming that the head address information corresponds to the head address of the surface of the optical disc.

  In the recording surface number calculation 1000, the control unit 12 calculates how many data surfaces of the optical disc 3 are based on the size information of the recording data included in the recording request command data. In the calculation, for example, 1 is added to the quotient obtained by dividing the size information of the recording data by the capacity per surface of the optical disc 3, and the addition result is used as the number of surfaces. Hereinafter, the number of faces is S.

  After the recording surface number calculation 1000, the control unit 12 determines whether or not S is greater than the number M of the A-side drives in data amount determination (1) 1001. When the S is greater than the M, it is determined as True, and when it is equal to or less than the M, it is determined as False.

  When the control unit 12 determines True in the data amount determination (1) 1001, the A-side drive disk storage 1002 is performed. In the A-side drive disk storage 1002, the control unit 12 controls each unit to store the N number of optical disks 3 in the number of the B-side drives 17 in the A-side drive 16. In the present embodiment, description will be made on the assumption that they are stored in the drives A1 to AN, but the combination of storing the N optical disks 3 in the A-side drive 16 is not limited to this. The control unit 12 selects the number of the optical disks 3 corresponding to an integer number obtained by rounding the result obtained by dividing S by 2 to the nearest decimal point. In the selection, the optical disc identification information 1320 in which the A side and the B side are unrecorded in the recording state table is searched and selected. The N optical disks 3 are selected from N optical disks 3 indicated by the selected optical disk identification information 1320. The control unit 12 specifies the slot in the storage unit 18 in which the N optical disks 3 indicated by the selected optical disk identification information 1320 are stored. The control unit 12 controls the transport unit 14 to store the N optical disks in the drives A1 to AN. The transport unit 14 receives the control, takes out the optical disk 3 from the slot, moves, and controls the picker unit 15 to store the optical disk in the drives A1 to AN.

  The controller 12 performs A-side drive data recording 1003 after the A-side drive disk storage 1002. In the A-side drive data recording 1003, the control unit 12 determines the address in the optical disc 3 (hereinafter referred to as the optical disc address) and the information based on the head address information of the recording request command data and the size information of the recording data. A data amount to be recorded on the optical disc 3 (hereinafter referred to as an optical disc recording data amount) is calculated for each of the N optical discs. Further, data to be recorded on the N optical disks (hereinafter referred to as optical disk recording data) are respectively extracted from the recording data of the recording request command data. The control unit 12 transmits the address in the optical disc, the optical disc recording data amount, and the optical disc recording data to the drives A1 to AN, respectively. The drives A1 to AN record the optical disc recording data in the amount of the optical disc recording data from the address in the optical disc on the optical disc 3 stored by the picker unit 15. Here, by performing the parallel recording operation of the drives A1 to AN, the recording data for the N surfaces can be recorded in the recording time for approximately one surface, and high-speed recording can be performed.

  After the A side drive data recording 1003, the control unit 12 performs B (A) side drive disk storage 1004. In the B (A) side drive disk storage 1004, the control unit 12 stores the N optical disks 3 recorded in the A side drive data recording 1003 in the drives B1 to BN, respectively. To control. Under the control of the control unit 12, the transport unit 14 takes out the N optical disks 3 stored in the drives A1 to AN, moves them, and stores the N optical disks 3 in the drives B1 to BN. The unit 15 is controlled. Further, when the S calculated by the recording surface count calculation 1000 is larger than 2 × N, there is data that cannot be recorded on the N optical disks 3, so the control unit 12 further increases the N number of the optical disks 3. The optical disk 3 is selected and stored in the drives A1 to AN (maximum). The maximum N optical disks 3 to be selected are selected from the optical disks 3 selected in the A-side drive disk storage 1002.

  After the B (A) side drive disk storage 1004, the control unit 12 performs B (A) side drive data recording 1005. In the B (A) side drive data recording 1005, as in the A side drive data recording 1003, the control unit 12 uses the start address information of the recording request command data and the size information of the recording data on the optical disc. An internal address and an optical disk recording data amount are calculated for each of the N optical disks. Further, the N pieces of optical disc recording data are respectively extracted from the recording data of the recording request command data. The control unit 12 transmits the address in the optical disc, the optical disc recording data amount, and the optical disc recording data to the drives B1 to BN, respectively. The drives B1 to BN record the optical disk recording data in the amount of the optical disk recording data from the address in the optical disk on the optical disk stored by the picker unit 15. Here, by performing the parallel recording operation of the drives B1 to BN, the recording data for the N surfaces can be recorded in the recording time for approximately one surface, and high-speed recording can be performed. Further, when the optical disk is also stored in the drives A1 to AN in the B (A) side drive disk storage 1004, the addresses in the optical disk are stored in the drives A1 to AN similarly to the A side drive data recording 1003. The optical disc recording data amount and the optical disc recording data are transmitted, and the drives A1 to AN perform parallel recording operations.

  After the B (A) side drive data recording 1005, the control unit 12 performs an end determination 1006. In the end determination 1006, the control unit 12 determines whether or not all the recording data of the recording request command data has been recorded on the optical disc 3. If it is determined that all the recording data of the recording request command data has not yet been recorded on the optical disc 3, the processing returns to the B (A) side drive disk storage 1004. On the other hand, when it is determined that all the recording data of the recording request command data has been recorded on the optical disc 3, the control unit 12 performs a table update 1012 process to be described later.

  In the data amount determination (1) 1001, when the control unit 12 determines False, data amount determination (2) 1007 is performed. In the data amount determination (2) 1007, it is determined whether the S is greater than the number N of the B-side drives 17 or not. When the S is greater than the N, it is determined as True, and when it is equal to or less than the N, it is determined as False.

  When the control unit 12 determines True in the data amount determination (2) 1007, the controller 12 performs A-side drive disk storage 1008. In the A-side drive disk storage 1008, the control unit 12 controls each unit to store the same number of the optical disks 3 as S in the A-side drive 16. In the present embodiment, description will be made on the assumption that they are stored in the drives A1 to AS, but the combination of storing the S optical disks 3 in the A-side drive 16 is not limited to this. The control unit 12 selects the S optical disks 3. In the selection, the optical disc identification information 1320 in which the A side is in an unrecorded state is searched and selected in the recording state table. The S optical disks 3 are selected from the S optical disks indicated by the selected optical disk identification information 1320. The control unit 12 specifies the slot in the storage unit 18 in which the S optical discs 3 indicated by the selected optical disc identification information 1320 are stored. The control unit 12 controls the transport unit 14 to store the S optical disks in the drives A1 to AS. The transport unit 14 receives the control, takes out the optical disk 3 from the slot, moves, and controls the picker unit 15 to store the optical disk 3 in the drives A1 to AS.

  The controller 12 performs A-side drive data recording 1009 after the A-side drive disk storage 1008. In the A-side drive data recording 1009, the control unit 12 sets the address in the optical disc and the amount of recording data on the optical disc based on the head address information and the size information of the recording data of the recording request command data to the S optical discs. Calculate for each of the three. In addition, the S optical disk recording data is extracted from the recording data of the recording request command data. The control unit 12 transmits the address in the optical disc, the optical disc recording data amount, and the optical disc recording data to the drives A1 to AS, respectively. The drives A1 to AS record the optical disk recording data in the amount of the optical disk recording data from the address in the optical disk on the optical disk 3 stored by the picker unit 15. Here, by performing the parallel recording operation of the drives A1 to AS, the recording data for the S surface can be recorded in the recording time for approximately one surface, and high-speed recording can be performed.

  After the A-side drive data recording 1009, the control unit 12 performs processing of a table update 1012 described later.

  When it is determined that the data amount determination (2) 1007 indicates False, the control unit 12 performs the B-side drive disk storage 1010. In the B-side drive disk storage 1010, the control unit 12 controls each unit so that the same number of the optical disks 3 as S are stored in the B-side drive 17. In the present embodiment, description will be made on the assumption that the drive is stored in the drives B1 to BS, but the combination of storing the S optical disks in the B-side drive 17 is not limited to this. The control unit 12 selects the S optical disks 3. In the selection, the optical disc identification information 1320 in which the B side is in an unrecorded state is searched and selected in the recording state table. The S optical disks 3 are S optical disks 3 selected from the optical disks 3 indicated by the selected optical disk identification information 1320. The control unit 12 specifies the slot in the storage unit 18 in which the S optical discs 3 indicated by the selected optical disc identification information 1320 are stored. The control unit 12 controls the transport unit 14 to store the S optical disks 3 in the drives B1 to BS. The transport unit 14 receives the control, takes out the optical disc 3 from the slot, moves, and controls the picker unit 15 to store the optical disc 3 in the drives B1 to BS.

  The controller 12 performs B-side drive data recording 1011 after the B-side drive disk storage 1010. In the B-side drive data recording 1011, the control unit 12 sets the address in the optical disc and the amount of recorded data on the optical disc based on the head address information and the size information of the recorded data of the recording request command data. Calculation is performed for each optical disc 3. Further, the S pieces of optical disc recording data are respectively extracted from the recording data of the recording request command data. The control unit 12 transmits the address in the optical disc, the optical disc recording data amount, and the optical disc recording data to the drives B1 to BS, respectively. The drives B1 to BS record the optical disk recording data in the amount of the optical disk recording data from the address in the optical disk on the optical disk 3 stored by the picker unit 15. Here, by performing the parallel recording operation of the drives B1 to BS, the recording data for the S surface can be recorded in a recording time for approximately one surface, and high-speed recording can be performed.

  When the controller 12 determines that all of the recording data of the recording request command data has been recorded on the optical disc 3 after the B-side drive data recording 1011, the controller 12 performs a table update 1012 process.

  The control unit 12 next updates the table update 1012 when the end determination 1006 determines True, when the A-side drive data recording 1009 ends, or when the B-side drive data recording 1011 ends. Do. In the table update 1012, the control unit 12 updates the address table and the recording state table.

  In updating the address table, the head address information of the recording request command data is added to the list of the address table as the head logical address 1310. When S is 2 or more, the value of (start address information + size of one surface of the optical disc 3 × s) (s = 1... S−1) is set as the start logical address 1310 and the S A set of data is added to the address table list.

  In the update of the recording state table, it is selected from the A-side drive disk storage 1001, the B (A) -side drive disk storage 1004, the A-side drive disk storage 1007, or the B-side drive disk storage 1010. For the optical disc 3, the control unit 12 searches the optical disc identification information 1320 and the surface information 1321 corresponding to the optical disc 3 in the recording status table and updates the field of the recording status information 1322 to data indicating recorded. .

  When the control unit 12 finishes the table update 1012, the control unit 12 ends the recording and transmits the recording status data to the request source via the interface unit 11 and the network 2. The recording status data is data including information indicating normal end or abnormal end. The abnormal end is, for example, that the start address information and the size information of the recording data of the recording request command data transmitted from the request source to the optical disc recording / reproducing apparatus 1 via the network 2 are already recorded on the optical disc 3. This indicates that the process of the recording request command data cannot be completed, for example, when an area including an area is indicated or when the number of recordable optical disks 3 and the number of faces are insufficient for the size information.

  In the present embodiment and the following embodiments, the head address information of the recording request command data has been described as corresponding to the head address of the surface of the optical disc 3, but the case where it does not correspond is as follows, for example: Process.

  In the recording surface number calculation 1000, the control unit 12 refers to the address table, and a set of data in which the address indicated by the head address information of the recording request command data is included in the range is included in the list of the address table. To find out if In the search, it is determined whether or not the head address information exists in the range from the head logical address 1310 to (the head logical address 1310 + the capacity per one surface of the optical disc 2). Search the list. If it exists as a result of the search, the control unit 12 initializes based on the search result data (the head logical address 1310 + capacity per surface of the optical disc 3−the head address information of the recording request command data). The recording size Size_ini_rec is calculated. The control unit 12 calculates the remaining recording size Size_rest_rec based on (the size information of the recording data of the recording request command data−the Size_ini_rec). The recording surface number S is a value obtained by adding 2 to the quotient obtained by dividing the Size_rest_rec by the capacity per surface of the optical disc 3. If not present as a result of the search, the control unit 12 subtracts the remainder obtained by dividing the head address of the recording request command data by the capacity per side of the optical disc 3 from the capacity per side of the optical disc 3. Based on the value, the initial recording size Size_ini_rec is calculated. The control unit 12 calculates the remaining recording size Size_rest_rec based on (the size information of the recording data of the recording request command data−the Size_ini_rec). The recording surface number S is a value obtained by adding 2 to the quotient obtained by dividing the Size_rest_rec by the capacity per surface of the optical disc 3.

  Further, the control unit 12 selects the optical disk 3 of an integer number obtained by rounding the result obtained by dividing S by 2 in the A-side drive disk storage 1002 to the nearest decimal point, or the A-side drive disk storage 1008, and when selecting the S optical disks 3 in the B-side drive disk storage 1010, the range includes the address indicated by the head address information of the recording request command data of the recording surface number calculation 1000. As a result of searching whether or not a set of data is included in the list of the address table, if the one set of data exists, the optical disc that selects the optical disc 3 indicated by the optical disc identification information 1311 of the data Include in 3.

  Also, the recording status information 1322 of the recording status table shown in FIG. 3 can be identified whether it is recorded or not recorded, and in the update of the recording status table in the table update 1012 Then, the recording status information 1322 corresponding to the optical disc identification information 1320 corresponding to the optical disc 3 that has not been recorded in the entire area of one surface of the optical disc 3 is rewritten to data indicating that a part has been recorded. As described above, the processing by the control unit 12 enables processing even when the head address information of the recording request command data does not correspond to the head address of the surface of the optical disc 3.

  In the A-side drive disk storage 1002, the B (A) -side drive disk storage 1004, the A-side drive disk storage 1008, and the B-side drive disk storage 1010, N or S If the optical disc 3 cannot be selected, the control unit 12 notifies the request source that the optical disc 3 could not be selected via the network 2, and the addition of the optical disc 3 or the recorded optical disc 3 and an unrecorded optical disc 3 are notified. Message data suggesting replacement with the optical disk 3 may be transmitted. As a result, it is possible to know that all of the data requested by the request source cannot be recorded.

  FIG. 10 is an example of a processing flow during reproduction in the optical disc recording / reproducing apparatus 1 as an embodiment of the present invention. Hereinafter, the reproduction processing operation of the optical disc recording / reproducing apparatus 1 will be described with reference to FIG.

  The request source transmits reproduction request command data to the optical disc recording / reproducing apparatus 1 via the network 2. The reproduction request command data includes reproduction data start address information and size information. The head address information is an address independent of the identification information of the optical disc from which the reproduction data is reproduced. The optical disc recording / reproducing apparatus 1 receives the reproduction request command data by the interface unit 11, and the interface unit 11 transmits the reproduction request command data to the control unit 12. When receiving the reproduction request command data, the control unit 12 starts reproduction. Note that the description will be made assuming that the head address information corresponds to the head address of the surface of the optical disc 3 as in the case of recording.

  In the address table extraction 1100, the control unit 12 records data corresponding to the size indicated by the size information from the address indicated by the start address information based on the start address information and the size information of the reproduction request command data. The optical disc identification information 1311 and the surface information 1312 of the optical disc 3 are all extracted from the address table.

  After the address table extraction 1100, the control unit 12 performs disk storage determination 1101. FIG. 11 shows an example of the processing flow of the disk storage determination 1101.

  When the reference surface determination 110100 refers to the optical disc identification information 1311 and the surface information 1312 extracted in the address table extraction 1100 in ascending order of addresses indicated by the head logical address 1310, the control unit 12 determines the reference surface determination. 110100 It is determined whether the surface information 1312 referred to at the start indicates the A surface or the B surface. When the surface information 1312 indicates the A surface, the A surface drive storage determination 110101 is performed. When the surface information 1312 indicates the B surface, the B surface drive storage determination 110104 is performed.

  In the A-side drive storage determination 110101, the control unit 12 determines whether the optical disc 3 indicated by the referenced optical disc identification information 1311 is stored in the storage unit 18 or the drives A1 to AM of the A-side drive 16. It is determined whether it is stored in any one of the drives B1 to BN of the B surface drive 17 or not. When it is determined that the data is stored in any one of the drives A1 to AM of the A-side drive 16 or any of the drives B1 to BN of the B-side drive 17, wait (A) 110102 is performed. When it is determined that the image is stored in the storage unit 18, reference plane confirmation (A) 110103 is performed.

  The control unit 12 stores the optical disk 3 indicated by the referenced optical disk identification information 1311 stored in any of the drives A1 to AM or any of the drives B1 to BN in the wait (A) 110102. The reference plane confirmation (A) 110103 is performed.

  The control unit 12 refers to the next surface information 1312 in the reference surface confirmation (A) 110103, and when the surface information 1312 indicates the A surface, the control unit 12 returns to the A surface drive storage determination 110101 and the next The same processing is performed on the optical disc identification information 1311. If the surface information 1312 indicates the B surface, the disk storage determination 1101 is terminated.

  In the reference surface determination 110100, the control unit 12 performs a B surface drive storage determination 110104 when the referenced surface information 1312 indicates the B surface. In the B-side drive storage determination 110104, the control unit 12 determines whether the optical disc 3 indicated by the referenced optical disc identification information 1311 is stored in the storage unit 18 or the drives A1 to AM of the A-side drive 16. It is determined whether it is stored in any one of the drives B1 to BN of the B surface drive 17 or not. When it is determined that any one of the drives A1 to AM or any one of the drives B1 to BN is stored, a wait (B) 110105 is performed. When it is determined that the image is stored in the storage unit 18, reference plane confirmation (B) 110106 is performed.

  The control unit 12 stores the optical disk 3 indicated by the referenced optical disk identification information 1311 stored in any of the drives A1 to AM or any of the drives B1 to BN in the wait (B) 110105. It waits until it is stored in the unit 18, and when it is stored, the reference surface confirmation (B) 110106 is performed.

  The control unit 12 refers to the next surface information 1312 in the reference surface confirmation (B) 110106, and when the surface information 1312 indicates the B surface, the control unit 12 returns to the B surface drive storage determination 110104 and the next The same processing is performed on the optical disc identification information 1311. If the surface information 1312 indicates surface A, the disk storage determination 1101 is terminated.

  In the wait (A) 110102, the optical disc 3 indicated by the referenced optical disc identification information 1311 stored in any of the drives A1 to AM or any of the drives B1 to BN is a storage unit. However, if the optical disc 3 indicated by the optical disc identification information 1311 referred to is stored in any one of the drives A1 to AM, It is also possible to wait until the recording or reproduction is completed. In this case, the time for storing and retrieving from the storage unit 18 can be omitted, so that the processing time can be shortened.

  Similarly, in the wait (B) 110105, the optical disc 3 indicated by the referenced optical disc identification information 1311 stored in any of the drives A1 to AM or any of the drives B1 to BN is stored. In the case where the optical disk 3 indicated by the referenced optical disk identification information 1311 is stored in any of the drives B1 to BN, the optical disk 3 is stored. It is also possible to wait until the recording or reproduction of the recording is completed. In this case, the time for storing and retrieving from the storage unit 18 can be omitted, so that the processing time can be shortened.

  After the disk storage determination 1101, the control unit 12 performs drive disk storage 1102. In the drive disk storage 1102, it is confirmed that the optical disk identification information 1311 and the surface information 1312 extracted from the address table in the address table extraction 1100 are stored in the storage unit 18 in the disk storage determination 1101. The transport unit 14, any one of the drives A1 to AM, or the drive so as to store all the optical discs 3 from the storage unit 18 in any of the drives A1 to AM or any of the drives B1 to BN. Any one of B1 to BN and the storage unit 18 are controlled. Whether the data is stored in any of the drives A1 to AM or any of the drives B1 to BN depends on the surface determined in the reference surface determination 110100 in FIG. In any case, if it is the B side, it is stored in any of the drives B1 to BN. It should be noted that all of the optical disks 3 that have been confirmed to be stored in the storage unit 18 in the disk storage determination 1101 are stored in the storage unit 18 to any one of the drives A1 to AM or the drives B1 to BN. However, it is needless to say that not all cases are satisfied when the wait (A) 110102 and the wait (B) 110105 in FIG. 11 wait until recording or reproduction on the optical disc 3 is completed. Yes.

  The control unit 12 performs data reproduction 1103 after the drive disk storage 1102. In the data reproduction 1103, the control unit 12 records the optical disc identification information 1311 of the optical disc 3 in which data of the size indicated by the size information is recorded from the address indicated by the head address information extracted in the address table extraction 1100. Of the surface information 1312, the optical disk 3 stored in one of the drives A1 to AM or any of the drives B1 to BN in the drive disk storage 1102 is calculated based on the head logical address 1310 information. The optical disk internal address and the optical disk playback data amount are transmitted to any one of the drives A1 to AM or the drives B1 to BN, respectively. Any one of the drives A1 to AM or the drives B1 to BN that has received the address in the optical disc and the amount of reproduction data of the optical disc or the drive B1 to BN is indicated by the address in the optical disc from the optical disc 3 stored by the picker unit 15. The optical disc reproduction data is reproduced from the address by the data amount indicated by the optical disc reproduction data amount. The reproduced optical disk reproduction data is sequentially transmitted to the request source via the interface unit 11 and the network 2. In this case, by performing a parallel reproduction operation of any one of the drives A1 to AM or the drives B1 to BN that have received the address in the optical disc and the amount of reproduction data of the optical disc, the reproduction time for approximately one surface can be obtained. Can be played back, and high-speed playback can be performed.

  The control unit 12 performs an end determination 1104 after the data reproduction 1103. In the end determination 1104, the control unit 12 records the optical disc identification information 1311 of the optical disc 3 in which data corresponding to the size indicated by the size information is recorded from the address indicated by the head address information extracted by the address table extraction 1100. And it is determined whether or not all the surfaces of the optical disc 3 indicated by the surface information 1312 have been reproduced. If it is determined that all playback has been performed, it is determined that the playback has ended, the playback process ends, and playback status data is transmitted to the request source via the interface unit 11 and the network 2. The reproduction status data is data including information indicating normal end or abnormal end. The abnormal end is, for example, the start address information of the reproduction data of the reproduction request command data transmitted from the request source to the optical disc recording / reproducing apparatus 1 via the network 2, and the size information indicating an unrecorded area on the optical disc 3. This indicates that the processing of the reproduction request command data cannot be completed, for example, in the case of indicating an area to be included. If it is determined in the end determination 1104 that all the data has not been played back, the disk storage determination 1101 is processed as incomplete.

  In the present embodiment and the following embodiments, the head address information of the reproduction request command data has been described as corresponding to the head address of the surface of the optical disc. I do.

  In the address table extraction 1100, the control unit 12 refers to the address table, and a set of the optical disc identification information 1311 and the surface information 1312 in which the address indicated by the head address information of the reproduction request command data is included in the range. Is searched for whether it is included in the address table list. In the search, it is determined whether or not the head address information exists in the range from the head logical address 1310 to (the head logical address 1310 + the capacity per one surface of the optical disc 2). Search the list. If it exists as a result of the search, the control unit 12 determines the initial playback size based on the search result data (the head logical address 1310 + capacity of one surface of the optical disc 2−the head address information of the playback request command). Calculate Size_ini_ply. The control unit 12 calculates the remaining reproduction size Size_rest_ply based on (size information of the reproduction data of the reproduction request command data−Size_ini_ply). The number of sets of the optical disk identification information 1311 and the surface information 1312 extracted by the address table extraction 1100 is a value obtained by adding 2 to the quotient obtained by dividing the Size_rest_ply by the capacity per surface of the optical disk 3.

  Further, in the data reproduction 1103, the control unit 12 uses the address table for the address in the optical disc and the amount of optical disc reproduction data to be transmitted to any one of the drives A1 to AM or any one of the drives B1 to BN. Any one of the drives A1 to AM or the drives B1 to BN for reproducing the optical disc 3 indicated by the optical disc identification information 1311 at the head of the data of the optical disc identification information 1311 and the surface information 1312 extracted in the extraction 1100 The in-optical disk address to be transmitted is calculated based on (capacity of one surface of the optical disk 2−Size_ini_ply), and the optical disk reproduction data amount is calculated based on the Size_ini_ply. Further, any one of the drives A1 to AM for reproducing the optical disc 3 indicated by the optical disc identification information 1311 at the end of the data of the optical disc identification information 1311 and the surface information 1312 extracted by the address table extraction 1100, or the drive The in-optical disk address to be transmitted to any one of B1 to BN is the head address of the surface of the optical disk 3, and the optical disk reproduction data amount is calculated based on the remainder obtained by dividing the Size_rest_ply by the capacity per one surface of the optical disk 3. To do.

  As described above, the processing by the control unit 12 enables processing even when the head address information of the reproduction request command data does not correspond to the head address of the surface of the optical disc 3.

  In the address table extraction 1100, a set of data of the optical disc identification information 1311 and the surface information 1312 including the address indicated by the head address information of the reproduction request command data is included in the list of the address table. If there is no search result, the control unit 12 may notify the request source that there is no data to be reproduced via the network 2. As a result, it is possible to know that there is no data requested by the request source for reproduction, and it is possible to perform error processing. This is the same in both cases where the head address information of the playback request command data corresponds to the head address of the surface of the optical disc 3 or not.

  As described above, in an optical disk recording / reproducing apparatus that records and reproduces data on a double-sided optical disk using a plurality of single-sided optical disk drive devices, the number of A-side drives and the number of B-side drives are different, and data is recorded during recording. When the number of optical discs to be recorded is larger than the larger number of A-side drives and B-side drives, recording is performed on both sides, and the number of sides is the number of A-side drives and the number of B-side drives. (Including the number of A-side drives and the number of B-side drives) is recorded only on the side with the larger number of single-sided optical disk drive devices, otherwise it is for single-sided optical disks. High-speed recording can be performed by performing parallel recording operation by recording only on the surface with the smaller number of drive devices. Further, by recording the related data recording surface on only one surface, it is possible to easily carry the optical disk when the recording is performed again on both surfaces during migration or the like.

  Further, when reproducing the optical disk 3 recorded on both sides, the same surface of the plurality of optical disks 3 is reproduced by a plurality of single-side optical disk drive devices, and the other surface of the plurality of optical disks is used for the other surface of the plurality. High-speed reproduction can be performed by performing parallel reproduction operation by reproducing with the one-side optical disk drive apparatus. Further, when reproducing the optical disk 3 recorded only on the surface with the larger number of single-sided optical disk drive devices, the reproduction is performed at a higher speed by performing the parallel reproduction operation by reproducing with the larger number of single-sided optical disk drive devices. Playback can be performed. Similarly, when reproducing the optical disk recorded only on the surface having the smaller number of single-sided optical disk drive devices, by performing the parallel reproduction operation by reproducing with the smaller number of single-sided optical disk drive devices. High-speed playback can be performed.

  That is, when recording / reproducing data having a capacity of two or more surfaces, the number of drives for recording / reproducing one side of the double-sided optical disc is different from the number of drives for recording / reproducing the other side. High-speed recording can be performed by switching between both sides, only one side, or only the other side according to the amount of data, and operating the drive in parallel.

  A second embodiment will be described. FIG. 12 is an example of a flow during recording in the optical disc recording / reproducing apparatus 1 as an embodiment of the present invention. Hereinafter, the recording processing operation of the optical disc recording / reproducing apparatus 1 will be described with reference to FIG. In FIG. 12, the same numbers are assigned to those performing the same processing as in FIG. 9.

  The difference between the recording flow shown in FIG. 12 and the recording flow shown in FIG. 9 is that the frequency determination 2000 is performed after the recording surface count calculation 1000. If the frequency determination 2000 determines True. The data amount determination (1) 1001 is performed. If it is determined as False, the A-side drive disk storage 1002 is performed.

In the second embodiment, the recording request command data transmitted from the request source to the optical disc recording / reproducing apparatus 1 via the network 2 is recorded in addition to the head address information, the size information, and the recording data of the recording data. Contains data frequency information. The recording data frequency information is information indicating the frequency with which the recording data is referred to. For example, the cumulative number of times the recording data is referred to before the request source transmits the recording request command data via the network 2. The level value when the request source classifies the number of times the recording data is referred to in several stages, and the predicted frequency to be referred to from the request source after the recording data is recorded in the optical disc recording / reproducing apparatus 1 It is a level value when the level is divided, and is not limited to this as long as it is information relating to the reference frequency from the request source of the recording data.
In the frequency determination 2000, the control unit 12 determines whether or not it is equal to or greater than a predetermined threshold (hereinafter referred to as a recording data frequency threshold) based on the recording data frequency information of the recording request command data. If it is equal to or greater than the recording data frequency threshold, it is determined as True, and the control unit 12 performs the data amount determination (1) 1001 as the next processing. If it is not equal to or greater than the recording data frequency threshold, it is determined to be False, and the A-side drive disk storage 1002 is performed as the next process.

  That is, the control unit 12 performs control so as to record the recording data that is low in reference frequency or predicted to be low in reference frequency on both surfaces of the optical disc 3. Since the recording data with a low reference frequency or predicted to have a low reference frequency can be considered to be managed or disposed of outside (offline) outside the optical disc recording / reproducing apparatus 1, When the recording data is recorded on both sides of the optical disc 3, the recording data on both sides of the optical disc becomes related data, so that it becomes easy to manage when managing offline, and the data becomes unnecessary. Since the entire optical disk 3 can be disposed as it is, it does not take time and effort to transfer the recording data.

  Since the processing flow at the time of reproduction by the optical disc recording / reproducing apparatus of the second embodiment is the same as that of the first embodiment, the description thereof is omitted.

  As described above, in addition to the effects of the first embodiment, the recording data that is infrequently referenced or predicted to be infrequently referred to is recorded on both sides of the optical disc 3, so that it is managed when managed offline. And / or disposal can be easily performed.

  A third embodiment will be described. FIG. 13 is an example of a flow at the time of double-sided recording processing in the optical disc recording / reproducing apparatus 1 as an embodiment of the present invention. The double-sided recording process is a process performed when re-recording on both sides of the optical disc 3 when related recording data is recorded on only one side of the plurality of optical discs 3. For example, it is a process performed when off-line management or disposal is easily performed, for example, when the frequency of reference to the optical disk 3 is reduced, and it can be considered triggered by a migration process or the like. In the first and second embodiments, the related recording data indicates that they are included in the recording data recorded over a plurality of surfaces of the optical disc 3 by one recording request command data.

  As a specific example of the double-sided recording process, the optical disk on which the recording data is recorded, which is the recording data recorded only on the A surface of the two or more optical disks 3 by the optical disk recording / reproducing apparatus 1. 3 is recorded on the B surface of the optical disc 3 by recording a part of the recording data related to the recording data recorded on the A surface. The recording data is recorded on both sides of the surface. The control unit 12 performs processing so that the recording data on the A side on which the recording data recorded on the B side has been recorded is not reproduced thereafter.

  In addition, recording data recorded only on the A side of the two or more optical discs 3 by the optical disc recording / reproducing apparatus 1 and not related data is recorded on the B side of the optical disc 3 on which the recording data is recorded. In the case of recording on both sides, the recording data recorded only on the A side is recorded on the both sides of the optical disc 3 which has not been recorded on both sides. The control unit 12 processes so that the recorded data recorded only on the A side is not reproduced thereafter.

  Similarly, the recording data recorded on only the B surface of the two or more optical disks 3 by the optical disk recording / reproducing apparatus 1 and the A surface of the optical disk 3 on which the recording data is recorded are not yet recorded. In this case, a part of the recording data related to the recording data recorded on the B surface is recorded on the A surface of the optical disc 3, thereby recording the recording data on both the A surface and the B surface. . The control unit 12 performs processing so that the recording data on the B side on which the recording data recorded on the A side is recorded will not be reproduced thereafter.

  In addition, recording data recorded on only the B surface of the two or more optical disks 3 by the optical disk recording / reproducing apparatus 1 and recording data not related to the A surface of the optical disk 3 on which the recording data is recorded are recorded. If so, the recording data recorded only on the B side is recorded on both sides of the optical disc 3 which has not been recorded on both sides. The control unit 12 processes so that the recorded data recorded only on the A side is not reproduced thereafter.

  Note that the double-sided recording process is unnecessary for the optical disk 3 on which the recording data recorded by the recording request command data has already been recorded on both sides and the optical disc on which only one side is recorded. Absent.

  Hereinafter, the double-side recording processing operation of the optical disc recording / reproducing apparatus 1 will be described with reference to FIGS.

  The request source transmits the double-sided recording request command data to the optical disc recording / reproducing apparatus 1 via the network 2. The double-sided recording request command data includes head address information and size information of data for performing double-sided recording (hereinafter referred to as double-sided recording data). The head address information of the double-side recording request command data is an address independent of the identification information of the optical disc 3 that reproduces the double-side recording data. The optical disc recording / reproducing apparatus 1 receives the double-sided recording request command data at the interface unit 11, and the interface unit 11 transmits the double-sided recording request command data to the control unit 12. When receiving the double-sided recording request command data, the control unit 12 starts double-sided recording. As in the first and second embodiments, the description will be made assuming that the head address information corresponds to the head address of the surface of the optical disc 3.

  In the address table extraction 3000, the control unit 12 records data for the size indicated by the size information from the address indicated by the start address information based on the start address information and the size information of the double-sided recording request command data. All of the optical disc identification information 1311 and the surface information 1312 of the optical disc 3 being extracted are extracted from the address table. Let S be the extracted number.

  After the address table extraction 3000, the control unit 12 performs the extraction number determination 3001. The control unit 12 determines the number of extracted from the address table the optical disc identification information 1311 and the surface information 1312 of the optical disc 3 in which data corresponding to the size indicated by the size information is recorded from the address indicated by the head address information. It is determined whether the number is 2 or more. If the number is 2 or more, the recording mode determination 3002 is performed as True, and if not, the double-sided recording process is terminated as False.

  When the control unit 12 determines that the extraction number determination 3001 is true, the control unit 12 performs the recording mode determination 3002 next. FIG. 14 is an example of the processing flow of the recording mode determination 3002.

  When the reference surface determination 300200 refers to the optical disc identification information 1311 and the surface information 1312 extracted in the address table extraction 3000 in ascending order of the addresses indicated by the head logical address 1310, the control unit 12 determines the reference surface determination. It is determined whether the surface information 1312 referred to at the start of 300200 indicates the A surface or the B surface. When the surface information 1312 indicates the A surface, reference surface confirmation (A) 300201 is performed, and when the surface information 1312 indicates the B surface, reference surface confirmation (B) 300204 is performed.

  In the reference surface confirmation (A) 300201, the control unit 12 refers to the next surface information 1312. When the surface information 1312 indicates the A surface, the control unit 12 returns to the reference surface confirmation (A) 300201 again. The same processing is performed for the next optical disc identification information 1311. When the surface information 1312 indicates the B surface, a recording mode determination (double-sided recording mode) 300205 is performed. When all the optical disc identification information 1311 and the surface information 1312 extracted by the address table extraction 3000 have been processed, it is determined that the list is at the end, and a recording mode determination (A surface recording mode) 300202 is performed.

  In the recording mode determination (A-side recording mode) 300202, the control unit 12 determines the recording mode as the A-side recording mode, and ends the recording mode determination 3002.

  In the reference surface determination 300200, when the surface information 1312 referred to at the start of the reference surface determination 300200 indicates the B surface, the reference surface confirmation (B) 300203 is performed. In the reference surface confirmation (B) 300203, the control unit 12 refers to the next surface information 1312. When the surface information 1312 indicates the B surface, the control unit 12 returns to the reference surface confirmation (B) 300203 again. The same processing is performed for the next optical disc identification information 1311. When the surface information 1312 indicates the A surface, the recording mode determination (duplex recording mode) 300205 is performed. When all the optical disc identification information 1311 and the surface information 1312 extracted by the address table extraction 3000 have been processed, it is determined that the list is at the end, and a recording mode decision (B surface recording mode) 300204 is performed.

  In the recording mode determination (B-side recording mode) 300204, the control unit 12 determines the recording mode as the B-side recording mode, and ends the recording mode determination 3002.

  When the surface information 1312 indicates the B surface in the reference surface confirmation (A) 300201, or when the surface information 1312 indicates the A surface in the reference surface confirmation (B) 300203, the recording mode is used. Determination (duplex recording mode) 300205 is performed. In the recording mode determination (double-sided recording mode) 300205, the control unit 12 determines the recording mode as the double-sided recording mode, and ends the recording mode determination 3002.

  When the recording unit determination 3002 determines that the A-side recording mode is selected, the control unit 12 performs a blank surface determination (A) 3003. In the empty surface determination (A) 3003, the control unit 12 determines whether or not the B surface of the optical disk 3 indicated by the optical disk identification information 1311 has been recorded for the optical disk identification information 1311 extracted by the address table extraction 3000. For example, referring to the recording status table of Example 1, the optical disc identification information 1320 of the recording status table corresponding to the optical disc 3 indicated by the optical disc identification information 1311 and the surface information 1321 of the recording status table indicate the B side. A set of data shown is retrieved and the recording status information 1322 of the set of data is referenced. The control unit 12 determines that the optical disc identification information 1311 extracted by the address table extraction 3000 is False when the recording status information indicating that one of the corresponding recording status information 1322 is recorded exists. A-side drive playback disk storage (F) 3004 is performed. Otherwise, A-side drive playback disk storage (T) 3010 is performed.

  In the A-side drive playback disk storage (F) 3004, the control unit 12 transfers the S optical disks 3 indicated by the optical disk identification information 1311 extracted by the address table extraction 3000 from the storage unit 18 to the drives A1 to A1. Each unit is controlled so as to be stored in one of the AMs.

  After the A-side drive playback disk storage (F) 3004, the control unit 12 performs the B-side drive recording disk storage (F) 3005. In the B-side drive recording disk storage (F) 3005, the control unit 12 controls each unit so as to store the optical disk 3 that has not been recorded on both sides from the storage unit 18 to any of the drives B1 to BN. The number of the optical disks 3 stored in the drives B1 to BN is the half of S (rounded up after the decimal point) or the smaller number N of the B-side drives 17.

  After the B-side drive recording disk storage (F) 3005, the control unit 12 performs disk copy (1) 3006. In the disk copy (1) 3006, the control unit 12 uses the B-side drive recording disk storage (F) 3005 among the optical disks 3 stored in the A-side drive playback disk storage (F) 3004. To BN, the number of the optical discs 3 stored in any one of the optical discs 3 is selected, and the recording data on the A side of the selected optical disc 3 is stored in the drive recording disc storage (F) 3005 for the B side in the drives B1 to BN. Any one of the drives A1 to AM and any one of the drives B1 to BN are controlled so as to copy to the optical disk 3 stored in any of the above. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order. At this time, any one of the drives A1 to AM and any one of the drives B1 to BN is subjected to parallel reproduction operation and parallel recording operation, whereby high-speed recording and reproduction can be performed.

  After the disk copy (1) 3006, the control unit 12 performs a disk copy (1) completion determination 3007. In the disc copy (1) completion determination 3007, it is determined whether or not the optical disc 3 has been copied for the half of the S (rounded up to the nearest decimal place). When the drive reproduction disk is removed 3008 and it is determined that copying has not yet been performed (False), the process returns to the B-side drive recording disk storage (F) 3005. At this time, in the B-side drive recording disk storage (F) 3004, the number of copies of the optical disc 3 that is half of the S (rounded up after the decimal point) has not yet been copied and the B-side drive 17 The control unit 12 controls each unit so as to store the smaller number of the optical disks 3 in the number N in any of the drives B1 to BN.

  When the control unit 12 determines True in the disc copy (1) end determination 3007, the control unit 12 performs the A-side drive playback disc ejection 3008. In the A-side drive playback disk ejection 3008, control is performed so that the optical disk 3 stored in any of the drives A1 to AM reproduced for copying in the disk copy (1) 3006 is stored in the storage unit 18. The unit 12 controls each unit. The number of optical disks 3 is half the number of S (rounded up after the decimal point).

  After taking out the A-side drive reproduction disk 3008, the control unit 12 performs the A-side drive recording disk storage 3009. In the A-side drive recording disk storage 3009, half of the S recorded in the disk copy (1) 3006 (truncated after the decimal point) is stored in any one of the drives A1 to AM. .

  After the A-side drive recording disk storage 3009, the control unit 12 performs disk copy (2) 3010. In the disk copy (2) 3010, the optical disk 3 that has not yet been copied from among the drives A1 to AM is stored in any of the drives A1 to AM in the A-side drive recording disk storage 3009. The control unit 12 controls each unit so as to perform the copying to the third.

  After the disk copy (2) 3010, the control unit 12 performs a table update 3025. The table update 3025 will be described later.

  In the empty surface determination (A) 3003, with respect to the optical disc identification information 1311 extracted by the address table extraction 3000, it is determined whether the B side of the optical disc 3 indicated by the optical disc identification information 1311 has been recorded. If No. 12 is determined, A-side drive playback disk storage (T) 3011 is performed. In the A-side drive playback disk storage (T) 3011, the control unit 12 selects the number of the optical disks 3 indicated by the optical disk identification information 1311 extracted by the address table extraction 3000 by half the number of S (rounded up after the decimal point). Then, each unit is controlled so as to be stored from the storage unit 18 in any of the drives A1 to AM. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order.

  After the A-side drive playback disk storage (T) 3011, the control unit 12 performs the B-side drive recording disk storage (T) 3012. In the B-side drive recording disk storage (T) 3012, the A-side drive playback disk storage (T) 3011 among the optical disks 3 that were not selected to be stored in any of the drives A1 to AM. The control unit 12 controls each unit so that the half of S (rounded down) and the smaller number of N are selected and stored in any one of the drives B1 to BN. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order.

  After the B-side drive recording disk storage (T) 3012, the control unit 12 performs disk copy (3) 3013. In the disk copy (3) 3013, the control unit 12 out of the optical disk 3 stored in the A-side drive playback disk storage (T) 3011, uses the B-side drive recording disk storage (T) 3012 in the drive B1. To the number of the optical disks 3 stored in any one of BN to BN, and the recording data on the A side of the selected optical disk 3 is stored in the drive recording disk storage (T) 3012 for the B side in the drives B1 to BN. One of the drives A1 to AM and one of the drives B1 to BN are controlled so as to copy to the optical disk 3 stored anywhere. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order. At this time, any one of the drives A1 to AM and any one of the drives B1 to BN is subjected to parallel reproduction operation and parallel recording operation, whereby high-speed recording and reproduction can be performed.

  After the disk copy (3) 3013, the control unit 12 performs a disk copy (3) completion determination 3014. In the disk copy (3) completion determination 3014, it is determined whether or not the optical disk has been copied for half the number of S (rounded up after the decimal point). If it is determined that the copy has been performed (True), a table update described later is performed. If it is determined that copying has not yet been performed (False), the process returns to the B-side drive recording disk storage (T) 3012. At this time, in the B-side drive recording disk storage (T) 3012, the number of optical disks that have not yet been copied and the number of the B-side drives 17 among the half of the S (rounded up after the decimal point). The control unit 12 controls each unit so that the smaller number of the optical disks 3 is stored in any one of the drives B1 to BN.

  When the recording mode determination 3002 determines that the recording mode is the B-side recording mode, the control unit 12 performs a blank surface determination (B) 3015. In the empty surface determination (B) 3015, the control unit 12 determines whether or not the A surface of the optical disc 3 indicated by the optical disc identification information 1311 has been recorded for the optical disc identification information 1311 extracted by the address table extraction 3000. For example, referring to the recording status table of the first embodiment, the optical disc identification information 1320 of the recording status table corresponding to the optical disc 3 indicated by the optical disc identification information 1311 and the surface information 1321 of the recording status table are the A side. Is retrieved, and the recording status information 1322 of the one set of data is referred to. The control unit 12 determines that the optical disc identification information 1311 extracted by the address table extraction 3000 is False when the recording status information indicating that one of the corresponding recording status information 1322 is recorded exists. B-side drive playback disk storage (F) 3016 is performed. Otherwise, B-side drive playback disk storage (T) 3022 is performed.

  In the B-side drive playback disk storage (F) 3016, the control unit 12 transfers the S optical disks 3 indicated by the optical disk identification information 1311 extracted by the address table extraction 3000 from the storage unit 18 to the drives B1 to B1. Each unit is controlled to be stored in one of the BNs.

  After the B-side drive playback disk storage (F) 3016, the control unit 12 performs the A-side drive recording disk storage (F) 3017. In the A-side drive recording disk storage (F) 3017, the control unit 12 controls each unit so as to store the optical disk 3 that has not been recorded on both sides from the storage unit 18 to any of the drives A1 to AM. The number of the optical disks 3 stored in the drives A1 to AM is half of the S (rounded up after the decimal point).

  After the A-side drive recording disk storage (F) 3017, the control unit 12 performs disk copy (4) 3018. In the disk copy (4) 3018, the control unit 12 uses the A-side drive recording disk storage (F) 3017 among the optical disks 3 stored in the B-side drive playback disk storage (F) 3016, and drives the drive A1. The number of the optical disks 3 stored in any one of the optical disks 3 is selected, and the recording data on the B surface of the selected optical disk 3 is stored in the drive recording disk storage (F) 3017 for the A surface in the drives A1 to AM. One of the drives A1 to AM and one of the drives B1 to BN are controlled so as to copy to the optical disk 3 stored anywhere. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order. At this time, any one of the drives A1 to AM and any one of the drives B1 to BN is subjected to parallel reproduction operation and parallel recording operation, whereby high-speed recording and reproduction can be performed.

  After the disk copy (4) 3018, the control unit 12 performs B-side drive playback disk removal 3019. In the B-side drive reproduction disk takeout 3019, control is performed so that the optical disk 3 stored in any of the drives B1 to BN reproduced for copying by the disk copy (4) 3018 is stored in the storage unit 18. The unit 12 controls each unit. The number of optical disks 3 is half the number of S (rounded up after the decimal point).

  After the B-side drive playback disk removal 3019, the control unit 12 performs the B-side drive recording disk storage 3020. In the B-side drive recording disk storage 3020, half of the S recorded in the disk copy (4) 3018 (truncated after the decimal point) is stored in one of the drives B1 to BN. .

  After the B-side drive recording disk storage 3020, the control unit 12 performs disk copy (5) 3021. In the disk copy (5) 3021, the optical disk 3 that has not yet been subjected to disk copy among the drives B1 to BN is stored in any of the drives B1 to BN in the B-side drive recording disk storage 3020. The control unit 12 controls each unit to perform copying on the optical disc.

  After the disk copy (5) 3021, the control unit 12 performs a table update 3025. The table update 3025 will be described later.

  In the empty surface determination (B) 3015, with respect to the optical disc identification information 1311 extracted by the address table extraction 3000, it is determined whether or not the A side of the optical disc 3 indicated by the optical disc identification information 1311 has been recorded. If No. 12 is determined, B-side drive playback disk storage (T) 3022 is performed. In the B-side drive playback disk storage (T) 3022, the control unit 12 selects the number of the optical disks 3 indicated by the optical disk identification information 1311 extracted by the address table extraction 3000 by a half number of the S (rounded up after the decimal point). Then, each unit is controlled so as to be stored from the storage unit 18 in any of the drives B1 to BN. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order.

  After the B-side drive playback disk storage (T) 3022, the control unit 12 performs the A-side drive recording disk storage (T) 3023. In the A-side drive recording disk storage (T) 3023, the B-side drive playback disk storage (T) 3022 includes the optical disk 3 that is not selected to be stored in any of the drives B1 to BN. The control unit 12 controls each unit so as to select the half of S (rounded down after the decimal point) number of the optical disks 3 and store them in any of the drives A1 to AM. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order.

  After the A-side drive recording disk storage (T) 3023, the control unit 12 performs disk copy (6) 3024. In the disc copy (6) 3024, the control unit 12 uses the drive A1 in the A-side drive recording disc storage (T) 3023 among the optical discs 3 stored in the B-side drive playback disc storage (T) 3022. The number of the optical discs 3 stored in any one of the optical discs 3 to AM is selected, and the recording data on the B side of the selected optical disc 3 is stored in the drives A1 to AM in the A side drive recording disc storage (T) 3023. Any one of the drives A1 to AM and any one of the drives B1 to BN are controlled so as to copy to the optical disk 3 stored in any of the above. In the selection, for example, the addresses indicated by the head logical address 1310 are selected in ascending order. At this time, any one of the drives A1 to AM and any one of the drives B1 to BN is subjected to parallel reproduction operation and parallel recording operation, whereby high-speed recording and reproduction can be performed.

  After the disk copy (6) 3024, the control unit 12 performs a table update 3025. In the table update 3025, the control unit 12 updates the address table and the recording state table.

  In updating the address table, the optical disc identification information 1311 and the surface information 1312 extracted by the address table extraction 3000 are used as the disc copy (1) 3006, the disc copy (2) 3010, and the disc copy (3) 3013. The optical disc identification information 1311 and the surface information 1312 corresponding to the optical disc 3 recorded in the disc copy (4) 3018, the disc copy (5) 3021, and the disc copy (6) 3024 are updated.

  In updating the recording status table, the disc copy (1) 3006, the disc copy (2) 3010, the disc copy (3) 3013, the disc copy (4) 3018, among the recording status tables, For the optical disc identification information 1311 and the surface information 1312 corresponding to the optical disc 3 recorded by the disc copy (5) 3021 and the disc copy (6) 3024, the recording state information 1322 is updated to data indicating that recording has been completed. To do.

  When the control unit 12 finishes the table update 3025, the control unit 12 ends the double-sided recording process, and transmits the double-sided recording process status data to the request source via the interface unit 11 and the network 2. The double-side recording process status data is data including information indicating normal end or abnormal end. In the abnormal end, for example, the start address information of the double-side recording data of the double-side recording request command data transmitted from the request source to the optical disc recording / reproducing apparatus 1 via the network 2 and the size information are not recorded on the optical disc 3. The double-sided recording request command data cannot be completed, such as when an area including the above-mentioned area is indicated, or when the number of recordable optical disks 3 and the number of faces are insufficient for the size information. Show.

  As described above, the related data is the recording data recorded only on one side of the optical disc. For example, the recording data whose reference frequency is reduced is re-recorded on both sides of the optical disc. In addition, offline management and disposal can be easily performed.

  The head address information included in the recording request command data, the reproduction request command data, and the double-sided recording request command data in the first to third embodiments of the present invention is a logic independent of the identification information of the optical disc 3. Although the address is used, an address associated with the identification information of the optical disc 3 may be used. In this case, the request source connected via the network 2 needs to manage and refer to data indicating the correspondence between the recording data and the identification information of the optical disc 3.

  The optical disk 3 has been described as a double-sided optical disk, but may include a single-sided optical disk. In this case, the surface information 1311 corresponding to the single-sided optical disk of the address table and the surface information 1321 corresponding to the single-sided optical disk of the recording state table have only one-sided information.

  The number of layers on one surface of the optical disk 3 may be one or two, and the number of layers is not limited.

  In the first to third embodiments of the present invention, the recording capacity per one surface of the optical disc 3 recorded and reproduced by the optical disc recording / reproducing apparatus 1 is described as being equal, but may be different. In this case, the address table further includes size information indicating a recording capacity of one surface corresponding to the optical disc identification information 1311 and the surface information 1312, and the optical disc identification information 1320 and the surface information 1321 in the recording state table. Further includes size information indicating the recording capacity of one surface corresponding to. At this time, in the recording surface number calculation 1000, the address table and the recording state table are referred to, and the surface of the optical disc 3 in which the recording state information indicates unrecorded is searched while referring to the size information. The number of faces S is determined.

  In the first to third embodiments of the present invention, when the number of surfaces is equal to or greater than M, recording is performed on the A surface of the N optical disks, and then is recorded on the B surface of the N optical disks 3. Has been described, but the flow for recording on both sides of the optical disc 3 is not limited to the above. For example, after recording on the A side of the M optical discs 3 The same effect as in the above embodiment can also be obtained in the flow of recording on the A side of the optical disk 3 again after repeating the recording on the B side of the N optical disks 3 several times. Needless to say, it is not always necessary to perform recording from the A side of the optical disk, and the same effect as in the above-described embodiment can be obtained.

  In the first to third embodiments of the present invention, the address table is a list of recorded areas, but the unrecorded optical disk 3 and surface may be included in the list. In this case, a logical address is assigned to the unrecorded optical disc 3 in advance.

  In the first to third embodiments of the present invention, the number M of the A-side drives 16 is assumed to be larger than the number N of the B-side drives 17, but the number N is larger than the number M. In this case, the same explanation can be made by replacing A and B in the above drawings and explanation.

  In the first to third embodiments of the present invention, the number M of the A-side drives 16 is assumed to be larger than the number N of the B-side drives 17, but the M is an integral multiple of the N. In some cases, even when the recording request command data and the reproduction request command data having a data amount larger than the M-plane are continuously received, the A-side drive 16 is connected to each of the N recording request commands. Since data and each reproduction request command data are allocated and can be recorded and reproduced in parallel, processing can be performed at higher speed. The same effect can be obtained when the relationship between M and N is reversed. Further, the same effect can be obtained even when continuous recording request command data and reproduction request command data are mixed and continuous. Further, when the M is an integer multiple of the N, the M optical discs are stored in one cartridge and handled as RAID (Redundant Arrays of Independent Disks, or Redundant Arrays of Independent Disks), Recording / playback is performed with the A side of the M optical discs as one volume and the B side of the N optical discs as one volume, and large volumes of data and data requiring high-speed recording / playback are on the A side. By recording small-capacity data or data that does not require relatively high-speed recording / reproduction on the B side, data can be efficiently recorded / reproduced. If the number of the A-side drives 16 and the number of the B-side drives 17 are equal, it is difficult to record / reproduce large-capacity data or data that requires high-speed recording / reproduction. According to the above, it is possible to efficiently record and reproduce data as described above. In order to operate as described above, the request source does not transmit the recording request command data or the reproduction request command data relating to data exceeding the data amount for the M plane, or the optical disc recording / reproducing apparatus 1 When the recording request command data or the reproduction request command data relating to data exceeding the data amount for the M plane is received, the operation flow ends abnormally. For example, in the operation flow of FIG. 9, the data amount determination (1 ) 1001, the A-side drive disk storage 1002, the A-side drive data recording 1003, the B (A) -side drive disk storage 1004, the B (A) -side drive data recording 1005, and the end determination 1006 This can be realized by using an operation flow in which is deleted. The relationship between the M and the N can achieve the same effect when the X times the M and the Y times the N (X and Y are natural numbers) are equal, and the A plane is the M number One volume can be handled as an optical disk, and the B side can be handled as one volume by the N optical disks. In this case, the number of the optical discs X times M may be stored in one cartridge.

  In the above embodiment, a write-once optical disc has been described. However, the present invention is not limited to this, and can be applied to a rewritable optical disc. When a write-once optical disk is used, when the optical disk recording / reproducing apparatus is used for archiving, the recorded data is not accidentally overwritten or intentionally altered by others. Therefore, it is useful from the viewpoint of data integrity and security.

  In the first to third embodiments of the present invention, the address table is stored in the memory unit 13, but storage such as a server (not shown) to which the optical disc recording / reproducing apparatus 1 is connected via the network 2 is stored. May be stored and managed by the control unit of the server. In that case, the read / write operation of the address table performed by the control unit 12 in the first to third embodiments is performed by the control unit of the server.

  In the first to third embodiments of the present invention, the recording state table is stored in the memory unit 13. However, the optical disk recording / reproducing apparatus 1 is connected to the network 2 via a server (not shown). You may memorize | store in a memory | storage part and the control part of the said server may manage. In that case, the control unit of the server performs reading and writing of the recording state table that was performed by the control unit 12 in the first to third embodiments.

In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

DESCRIPTION OF SYMBOLS 1 ... Optical disk recording / reproducing apparatus 2 ... Network 11 ... Interface part 12 ... Control part 13 ... Memory part 14 ... Conveyance part 15 ... Picker part 16 ... Drive for A side 17 ... Drive for B side 18 ... Storage part

Claims (20)

In an optical disk recording / reproducing apparatus for recording data on a double-sided optical disk medium and / or reproducing data recorded on the double-sided optical disk medium,
M (M is a natural number) optical disc recording / reproducing units A for recording and / or reproducing one side of the double-sided optical disc medium;
Controls recording and reproduction of N optical disk recording / reproducing units B (N is a natural number) for recording and / or reproducing the other surface of the double-sided optical disk medium, and recording and reproducing of the optical disk recording / reproducing unit A and the optical disk recording / reproducing unit B A control unit,
The M and the N are different, and when the control unit records or reproduces data across a plurality of surfaces of the double-sided optical disc medium, the plurality of optical disc recording / reproducing units A or the plurality of optical discs are used. An optical disc recording / reproducing apparatus, wherein the recording / reproducing unit B controls in parallel to record data on the double-sided optical disc medium or to reproduce data from the double-sided optical disc medium.   When recording data on the double-sided optical disc medium, the control unit according to claim 1 records data on both sides of the double-sided optical disc medium based on the amount of data to be recorded, or records data on only one side. An optical disc recording / reproducing apparatus that switches between recording and recording on the other side only.   3. The double-sided optical disk medium according to claim 2, wherein the recording data amount is larger than P times the capacity of one side of the double-sided optical disk (P is the larger of M and N). If the data is recorded on both sides of the double-sided optical disk and the data is larger than Q times (Q is the smaller value of M and N) and less than P times, the data is recorded only on one side of the double-sided optical disk, In this case, the optical disc recording / reproducing apparatus controls to record data only on the other side of the double-sided optical disc.   4. The optical disk recording / reproducing apparatus according to claim 3, wherein the P is an integral multiple of the Q, and the control unit performs recording / reproduction with the optical disc recording / reproducing unit A or the optical disc recording / reproducing unit B having a large number. In this case, the optical disk recording / reproducing apparatus controls to perform a process for recording data on both sides or a process for reproducing data recorded on both sides in parallel.   The control unit according to claim 1 records data on both sides of the double-sided optical disc medium based on a reference frequency of data to be recorded and a data amount to be recorded, or only on one side or only on the other side. An optical disc recording / reproducing apparatus, wherein data recording is switched.   The control unit according to claim 5, wherein the reference frequency of the data to be recorded is lower than a predetermined frequency, or the amount of data to be recorded is P times the capacity of one side of the double-sided optical disc (P is M, If the number is larger than N, the data is recorded on both sides of the double-sided optical disc, and the amount of data to be recorded is Q times the capacity of one side of the double-sided optical disc (Q is the value of M or N) In the case where it is larger and less than P times, data is recorded only on one side of the double-sided optical disc, and when the amount of data to be recorded is less than Q times the capacity of one side of the double-sided optical disc An optical disc recording / reproducing apparatus that controls to record data only on the other side of the double-sided optical disc.   The control unit according to claim 1, based on a reference frequency of data recorded on only one side or only the other side of the double-sided optical disc medium of R sheets (R is a natural number of 2 or more) R / 2 An optical disc recording / reproducing apparatus that controls to copy and record data of the R double-sided optical disc media on both sides of a double-sided optical disc medium (rounded up after the decimal point).   The control unit according to claim 7, based on a reference frequency of data recorded on only one side or only the other side of the double-sided optical disc medium of R sheets (R is a natural number of 2 or more). If the side is unrecorded, the data related to the opposite side is copied and recorded. If the opposite side is already recorded, both the new side and the data related to both sides of the unrecorded double-sided optical disc medium are recorded. An optical disc recording / reproducing apparatus controlled to perform copy recording.   The optical disc recording / reproducing apparatus according to claim 1, wherein the larger value (assuming P) of M and N is X times (X is a natural number) and the smaller value of M and N ( Q) is equal to Y times (Y is a natural number), and the control unit performs control to record or reproduce on one side of the P optical discs as a set, and record on the other side as Q sets of the optical discs Alternatively, an optical disc recording / reproducing apparatus that controls the reproduction.   The control unit according to claim 9, when the amount of data to be recorded is larger than a predetermined amount of data or when the recording / reproducing speed required for the data to be recorded is faster than a predetermined speed, When the data amount to be recorded is less than a predetermined data amount or when the recording / reproducing speed required for the data to be recorded is less than a predetermined speed, the optical disc Q An optical disc recording / reproducing apparatus for controlling recording on a surface to be controlled as a set. In an optical disk recording / reproducing method for recording data on a double-sided optical disk medium and / or reading data recorded on the double-sided optical disk medium,
Controlling at most M of M (M is a natural number) optical disc recording / reproducing sections A for recording and / or reproducing one side of the double-sided optical disc medium;
Controlling at most N out of N (N is a natural number) optical disc recording / reproducing sections B for recording and / or reproducing the other side of the double-sided optical disc medium,
The M and the N are different, and in the case of recording or reproducing data across a plurality of surfaces, a plurality of the optical disk recording / reproducing units A or a plurality of the optical disk recording / reproducing units B are arranged in parallel. An optical disc recording / reproducing method comprising recording data on a medium or reproducing data from the double-sided optical disc medium.   12. The optical disc recording / reproducing method according to claim 11, wherein when data is recorded on the double-sided optical disc medium, the data is recorded on both sides of the double-sided optical disc based on the amount of data to be recorded, or the data is recorded on only one side. Recording / reproducing method, wherein recording is switched between recording on the other side and recording only on the other side.   13. The optical disc recording / reproducing method according to claim 12, wherein the data size to be recorded is greater than P times the capacity of one side of the double-sided optical disc (P is the larger of M and N). If data is recorded on both sides of the optical disc, and Q times (Q is the smaller of M and N) and P times or less, data is recorded only on one side of the double-sided optical disc, and Q times An optical disc recording / reproducing method, wherein data is recorded only on the other side of the double-sided optical disc in the following cases.   14. The optical disc recording / reproducing method according to claim 13, wherein the P is an integral multiple of the Q, and the control unit performs recording / reproduction with the optical disc recording / reproducing unit A or the optical disc recording / reproducing unit B having a large number. In this case, the optical disk recording / reproducing method is characterized in that a plurality of processes for recording data on both sides or a process for reproducing data recorded on both sides are performed in parallel.   12. The optical disc recording / reproducing method according to claim 11, wherein data is recorded on both sides of the double-sided optical disc medium based on a reference frequency of data to be recorded and a data amount to be recorded, or only one side or the other side. An optical disc recording / reproducing method characterized in that data recording is switched to only the data.   The optical disc recording / reproducing method according to claim 15, wherein the reference frequency of the data to be recorded is lower than a predetermined frequency, or the amount of data to be recorded is P times the capacity of one side of the double-sided optical disc (P is If there is more than M or N, the data is recorded on both sides of the double-sided optical disc, and the amount of data to be recorded is Q times the capacity of one side of the double-sided optical disc (Q is M or N) When the value is larger and smaller than P times, data is recorded on only one side of the double-sided optical disc, and the amount of data to be recorded is Q times the capacity of one side of the double-sided optical disc or less. Includes recording data on only the other side of the double-sided optical disc.   The optical disc recording / reproducing method according to claim 11 is based on a reference frequency of data recorded on only one surface or only the other surface of R double-sided optical disc media (R is a natural number of 2 or more). A method for recording and reproducing an optical disk, comprising: copying and recording data of the R double-sided optical disk media on both sides of a double-sided optical disk medium (rounded up after the decimal point).   The optical disc recording / reproducing method according to claim 17 is based on a reference frequency of data recorded on only one side or only the other side of the R double-sided optical disc medium (R is a natural number of 2 or more). When the side surface is unrecorded, data related to the opposite side is copied and recorded. When the side surface is already recorded, both new sides are related to both sides of the unrecorded double-sided optical disc medium. An optical disk recording / reproducing method comprising copying and recording together with data.   12. The optical disc recording / reproducing method according to claim 11, wherein X is a larger value of M and N (P is a natural number) and X is a smaller value of M and N. Q) is equal to Y times (Y is a natural number), and recording or reproduction is performed on one side with the P optical disks as a set, and recording or reproduction is performed on the other side with the Q optical disks as a set. Optical disc recording / playback method.   12. The optical disc recording / reproducing method according to claim 11, wherein the optical disc P is recorded when a data amount to be recorded is larger than a predetermined data amount or when a recording / reproducing speed required for data to be recorded is higher than a predetermined speed. If the amount of data to be recorded is equal to or less than a predetermined data amount or the recording / reproducing speed required for the data to be recorded is equal to or less than a predetermined speed, Q optical discs are recorded. Is recorded on a surface controlled as a set.

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