JPH065001A - Optical disk device - Google Patents

Abstract

PURPOSE:To prevent the elongation of the executing time of a read command even if the command for reading the data in the defective sector in an optical disk in the reading command, which is outputted from a host computer, is included. CONSTITUTION:An optical disk drive LUN performs recording or regeneration for an optical disk ODN, A controller 12, which is connected to the optical disk drive LUN and a memory 13, is provided. The exchange data, which are recorded in the optical disk ODN, are recorded in an exchange data region 22 in the memory 13. Therefore, the executing time of the read command RC does not become long even if a command for reading out the data in the defective sector in the reading command is included, by reading the data in the defective sector, i.e. the exchange data, out of the exchange data region 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk apparatus suitable for application to, for example, an optical disk recording / reproducing apparatus in which data to be recorded in a defective sector of an optical disk is recorded in a replacement sector.

[0002]

2. Description of the Related Art FIG. 10 shows allocation of recording surfaces of an optical disc OD _N used in this type of optical disc device. Here, the optical disc OD _N, for example, it is assumed that the write-once optical disks at a constant linear velocity (CLV) scheme 30 cm.

The innermost circumference of the optical disc OD _N is the ID area 1
Is a type of optical disk OD _N This ID area 1,
Addresses for allocating sectors are recorded in advance. Here, 1 sector is 1 sector = 1024 bytes = 1K (km)
It is regarded as a part-time job. The total number of sectors is 3M (mega), so the total recording capacity is 3G (giga) bytes.

A portion outside the ID area 1 is a replacement information area 2, a portion outside the replacement information area 2 is a replacement data area 3, and the outside of the replacement data area 3 is a user-usable area ( Hereinafter, it is referred to as a user area) 4.

FIG. 11 shows allocation of storage capacity to the optical disk OD _N. The recording capacity is allocated to 20 sectors (20 Kbytes) for the ID area 1, 2048 sectors (2 Mbytes) for the replacement information area 2, 2048 sectors (2 Mbytes) for the replacement data area 3, and user area 4. The remaining about 2.6 Gbytes are allocated to.

In the replacement information area 2, the address (sector number) of the defective sector in which an error has occurred in the user area 4,
The address (sector number) of the replacement sector in the replacement data area 3 in which the content to be recorded in the defective sector is recorded as replacement data is recorded as a pair (hereinafter referred to as an address pair, if necessary). .

The optical disk OD _{N having the above-} described structure is a cartridge with a shutter and is inserted into the optical disk drive.

The optical disk drive is connected to a controller, and the controller sends the host computer an S
CSI (Small Computer System Interface) that is connected through a bus, the host computer by the data to the optical disc OD _N recording (hereinafter, optionally, a write or that write) or reproducing (hereinafter, optionally , Read, or read).

[0009]

However, in the above-mentioned conventional optical disk device, when the data recorded on the optical disk OD _N is read by the host computer,
If the read command includes a command to read the data of the defective sector, the data recorded in the user area 4 and the replacement data recorded in the replacement data area 3 on the inner circumference of the optical disc OD _N are read. Therefore, there is a problem in that it takes a long time to access the optical pickup, resulting in a relatively long execution time of the read command.

The present invention has been made in view of such a problem, and even when the read command includes a command for reading the data of the defective sector, the execution time of the read command becomes long. It is an object of the present invention to provide a non-existent optical disk device.

[0011]

SUMMARY OF THE INVENTION The first aspect of the present invention are, for example, as shown in FIG. 2, the optical disc drive OD _N recording or reproducing the optical disc OD _N, the optical disc drive OD _N storage means 13 and a control means 12 connected to the storage means 13, and the storage means 13 stores the replacement data recorded on the optical disc OD _N by the control means 12.
It was made to be memorized in.

A second aspect of the present invention comprises an optical disk drive for recording or reproducing on an optical disk, and control means connected to the optical disk drive and storage means, and when the optical disk is inserted into the optical disk drive. The replacement data recorded on the optical disk is stored in the storage device by the control device.

A third aspect of the present invention comprises an optical disk drive for recording and reproducing on an optical disk, and control means connected to the optical disk drive and storage means, the control means being recorded on the optical disk. And storing new replacement data in the storage means, and when new replacement data is generated on the optical disc, the new replacement data is recorded in the storage means after being recorded in the optical disc. Is.

A fourth aspect of the present invention comprises an optical disc drive for recording or reproducing on an optical disc, and control means connected to the optical disc drive and storage means, the control means being recorded on the optical disc. When the existence of the replacement sector is known while the existing data is reproduced by the optical disk drive, the replacement data recorded in the replacement sector is stored in the storage means.

According to a fifth aspect of the present invention, an optical disk drive for recording or reproducing on an optical disk, a storage means having a data buffer area and a replacement data area, and a control connected to the optical disk drive and the storage means. The control means stores the replacement data recorded on the optical disc in the replacement data area of the storage means, and is changed when the storage capacity of the data buffer area in the storage means is changed. The storage capacity of the replacement data area is changed according to the storage capacity.

According to a sixth aspect of the present invention, a plurality of optical disc drives arranged on a plurality of optical discs for performing recording or reproduction on the optical discs, and a control connected to the plurality of optical disc drives and storage means. Means for storing the replacement data recorded on the plurality of optical disks by the control means in the storage means.

According to a seventh aspect of the present invention, a plurality of optical disc drives arranged on a plurality of optical discs for performing recording or reproduction on the optical discs, and a control connected to the plurality of optical disc drives and storage means. The control means causes the storage means to store the replacement data recorded on the plurality of optical disks respectively inserted into the plurality of optical disk drives, and records the replacement data on the optical disk taken out from the optical disk drive. The replacement data recorded corresponding to the existing replacement data is deleted from the storage means.

[0018]

According to the first aspect of the present invention, for example, as shown in FIG. 2, the replacement data recorded on the optical disk OD _N is stored in the storage means 13, so that the defective sector is included in the read command RC. Even when the command for reading the data is included, the execution time of the read command RC is not lengthened by reading the data of the defective sector, that is, the replacement data from the storage unit 13.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the optical disk device of the present invention will be described below with reference to the drawings. In the drawings referred to below, the same reference numerals are given to those corresponding to those shown in FIGS. 10 and 11 above. Further, the structure of an optical disc to be referred to as an example below, are the same configuration as the optical disc OD _N shown in FIGS. 10 and 11 described above will be explained with reference also to those FIGS. 10 and 11.

The optical disc is not limited to the CLV type write-once type optical disc, but may be a CAV type write-once type optical disc or a CLV type / CAV type rewritable type optical disc.

FIG. 1 shows the overall structure of an optical disk device according to this embodiment. In FIG. 1, reference numeral 11 is a host computer, and a read command RC, a write command WC, a mode selection command MC and the like are supplied from the host computer 11 to a controller 12 of an optical disc as a control means through a SCSI bus.

The controller 12 is connected to a memory 13 which is a storage means as a high speed recording / reproducing means. In this example, the semiconductor memory DR is used as the memory 13.
AM-IC is adopted, and the memory 13 has a storage capacity of 8 Mbytes (for example, a 1 Mbyte DRAM-IC is
8).

Eight optical disk drives LU _{0 to} LU ₇ are connected to the controller 12 through a daisy chain 9. The optical disc drives LU _{0 to} L
Of U _7, when referring to any one of the optical disk drive, hereinafter referred to as an optical disk drive LU _N.

These optical disk drives LU _{0 to} LU
The _7, respectively, the optical disc OD ₀ ~OD ₇ which is a configuration of a cartridge is inserted, or is discharged (taken out). Similarly, optical disks OD _{0 to} OD ₇
Of these, an optical disc OD _N is used to refer to any one optical disc.

The read command RC and the write command WC described above are not limited to reading and writing between the host computer 11 and the optical disk OD _N, but may include reading and writing between the optical disks OD _N. .

FIG. 2 shows a detailed structure of a part of the optical disk device shown in FIG. The same parts as those shown in FIG. 1 are designated by the same reference numerals.

The controller 12 includes a CPU 15 and input / output interfaces 16 and 1 which are mutually connected by a bus 14.
7, ROM 18 and RAM 19. ROM
A management program for the memory 13, a management program for the optical disk drives LU _{1 to} LU ₇ , and the like are stored in advance in 18.

A memory 13 managed by the CPU 15 is connected to the bus 14.

The memory 13 is basically divided into three areas of a data buffer 21, a replacement data area 22 and an area 27 for use. Area 27 is the replacement information area 2
3, the replacement data area management table 24, the work area 25, and the other area 26. Other area 2
A cache area for caching during reading, an ID area, and other work areas are assigned to the area 6.

A total of 1 Mbytes is fixedly allocated to the area 27. A total of 7 Mbytes is allocated to the data buffer 21 and the replacement data area 22.

Data buffer 21 and alternate data area 22
The respective storage capacities can be switched between two types under the control of the controller 12 in accordance with the mode selection command MC output from the host computer 11.

FIG. 3 shows allocation of the two types of storage capacity changes. As can be seen from FIG. 3, in the first type, the storage capacity of the data buffer 21 is 512 Kbytes, and the storage capacity of the replacement data area 22 is 6.5 Mbytes = 2.
6 blocks (0th replacement data block DBK ₀ to 25th
It is allocated to the replacement data block DBK ₂₅ ). In addition,
One replacement data block DBK is defined as 256K bytes.

In the second type, the storage capacity of the data buffer 21 is increased to 4 Mbytes, and the storage capacity of the replacement data area 22 is correspondingly reduced to 3 Mbytes = 12 × replacement data block DBK.

Here, when the first type is selected, the storage capacity of the data buffer 21 increases, which is advantageous in terms of the data transfer rate, but the replacement data area 22 is correspondingly increased.
The storage capacity of the first type and the second type are in a so-called trade-off relationship.

The replacement data stored in the replacement data area 22 is limited to the replacement data recorded in the replacement data area 3 of the optical disk OD _N inserted in the optical disk drive LU _N. Therefore, when the optical disk OD _N is taken out from the optical disk drive LU _N , that is, when it is ejected, the replacement data is automatically erased.

In FIG. 2, the data buffer 21 is used as a buffer memory when recording or reproducing data on the optical disc OD _N.

The replacement data area 22 has an optical disk OD.
The replacement data recorded in the replacement data area 3 on _N (see FIGS. 10 and 11) is recorded. In this case, the replacement data is read in blocks (hereinafter referred to as replacement data blocks ABK). Here, the number of sectors included in each replacement data block ABK is defined as 256. Therefore, the replacement data area 3 to which 2048 Kbytes are allocated is managed by being divided into eight replacement data blocks ABK _{0 to} ABK ₇ .

FIG. 4 shows the relationship between the replacement data area 3 of the optical disk OD _N and the replacement data area 22 of the memory 13. That is, the replacement data area 3 of one optical disk OD _N is divided into eight replacement data blocks ABK _{0 to} ABK ₇ each having 256 Kbytes and managed (see FIG. 4A). On the other hand, the replacement data area 22 of the memory 13 is managed by being divided into 26 replacement data blocks DBK _{0 to} DBK ₂₅ each having 256 Kbytes (see FIG. 4B). Therefore, in the case of the first type of division described above, the optical disc O
It is possible to record about 3 times as much replacement data as the replacement data area 3 of D _N , in other words, about 3 replacement data of the optical disc OD _N.

In FIG. 2, in the replacement information area 23, replacement information recorded in the replacement information area 2 on the optical disc OD _N , that is, an address (sector number) of a defective sector in which an error has occurred in the user area 4 is recorded. , The address pair with the address (sector number) of the replacement sector in the replacement data area 3 in which the contents to be recorded in the defective sector are recorded as replacement data. In this case, 4 bytes (3 bytes for the address and 1 byte for the pointer, 4 bytes in total) are allocated to the recording of one defective sector address pair.

Therefore, in order to record the replacement information for one disc of the optical disk OD _N , a maximum of 8 Kbytes (8 Kbytes = 4 bytes × 256 sectors × 8 replacement data blocks A)
A storage capacity of BK _{0 to} ABK ₇ ) is required. Therefore, as the storage capacity of the replacement information area 27, 64 Kbytes are allocated in order to record all replacement information for eight optical disks OD _{0 to} OD ₇ . The replacement information is the optical disc OD at the time of so-called spin-up immediately after the optical disc OD _N is inserted into the optical disc drive LU _{N.
It is} read from _N and stored in the replacement information area 23.

In the replacement data area management table 24, for example, when the first type of storage capacity allocation is selected, the usage states of the 26 replacement data blocks DBK _{0 to} DBK _{25 in} the replacement data area 22 are selected. Is written (see FIG. 4C). The data "0" represents the used state, and the data "1" represents the unused state. The storage capacity assigned to the replacement data area management table 24 is 26 bytes. This replacement data area management table 2
The contents of 4 are, for example, as described above, the optical disc OD _N.
There when it is ejected from the optical disk drive LU _N, corresponding to the replacement data is erased from the alternative data area 22, the replacement data block DBK ₀ to DB
Among the data _indicating the usage state of K ₂₅ , the corresponding data is rewritten from “0” to “1”.

In FIG. 2, the work area 25 includes an EMC.
(Error Margin Check) Status map MAP0 to MAP6
3 is created. To 64 formed, in order to manage the state of each sector of the replacement data block ABK ₀ ~ABK ₇ of 8 sheets of the optical disc OD _N. The status of each sector can be managed with 1 byte. Therefore,
The storage capacity is 32 Kbytes (32 Kbytes = 256 sectors x 1 byte x 8 replacement data blocks ABK _{0 to} ABK
₇ x 8 sheets) are allocated.

Optical disk drives LU _{0 to} LU ₇ are connected to the input / output interface 16. The optical disk drives LU _{0 to} LU ₇ have the same structure. However, the replacement data area 22 of the memory 13 is
The optical disk drives LU _{0 to} LU ₇ are preferentially used in ascending order of the numbers.

The recording data Q ₁ is supplied from the input / output interface 16 to the recording processing circuit 31. Recording processing circuit 3
1 is an optical recording drive signal Q ₂ corresponding to this recording data Q _1.
Is generated and supplied to the optical pickup 32.

The optical pickup 32 is an optical disc OD _N.
Are arranged so as to face each other and are moved in the radius R direction by a linear motor or the like (not shown). Here, the optical disc OD _N is the spindle motor 3
Since it is rotated at a constant linear velocity (CLV) in the direction of the arrow around the rotation axis of 3, the recording laser beam emitted from the optical pickup 32 can record data in the entire recording area of the optical disc OD _N. .

On the other hand, at the time of reproducing the data recorded on the optical disk OD _N , a reproducing laser beam having a smaller laser power than that at the time of recording is emitted from the optical pickup 32, and an optical reproduction information signal based on the reflected light is emitted. Q ₃ is supplied to the reproduction processing circuit 34. The reproduction processing circuit 34 supplies the reproduction data Q ₄ according to the optical reproduction information signal Q ₃ to the input / output interface 16.

Next, the operation of the above embodiment will be described in the order of A to C below with reference to the flow chart in relation to the replacement process. A. Transfer processing of replacement data when an optical disk is inserted into an optical disk drive (during spin-up) B. Transfer processing of replacement data at write command C. Transfer processing of replacement data at read command

A. Replacement data transfer processing when inserting an optical disk into an optical disk drive (during spin-up) (see the flowchart of FIG. 5)

First, the controller 12 monitors whether or not a new optical disk OD _N has been inserted into the optical disk drive LU _N (step S1).

When inserted, the rotation of the motor 33 is started and the spin-up state is set (step S).
2).

Immediately thereafter, under the control of the controller 12, the replacement information recorded in the replacement information area 2 of the optical disc OD _N is transferred to and stored in the replacement information area 23 of the memory 13 (step S2).

Next, the replacement data area 3 of the optical disk OD _N
When transferring and storing the replacement data recorded in the replacement data area 22 of the memory 13, the controller 12 checks whether or not there is a free space in the replacement data area 22 (step S4). In this case, the vacant information is as shown in FIG.
This can be easily understood by referring to the replacement data area management table 24 shown in C.

If there is no space, it is registered in the other area 26 as the replacement data block ABK in the waiting state, and the processing is terminated.

If there is a vacancy, the EMC status map MAP for the replacement data area 3 is created by that amount (step S5). In this case, from the controller 12 to E
MC command is output to the optical disc drive LU _N.

6A and 6B show examples of the EMC state map MAP. In FIG. 6A, 1-byte data such as the symbol “00” indicates the EMC state for one sector, and the meaning of each symbol is as follows. "00": Good "81": Not so good, but can be used as data. "82", "83": Not so good, but can be used depending on the application. “4b”: Can be read, but the write level is low and may not be readable in the future. "45": Blank and nothing is written.

In this case, only the sector "00" can be read. Therefore, when transferring the replacement data from the replacement data area 3 to the replacement data area 22 this time, as shown in FIG. 6B, the portions of the symbols “81” and “4b” are rewritten to the symbol “00” in the EMC state. Create map MAP ₁ .

Next, the controller 12 refers to the EMC state map MAP ₁ shown in FIG. 6B, reads out the replacement data from the sector of the replacement data area 3 corresponding to the symbol “00”, and replaces it in the replacement data area 22. Data is stored (step S6).

[0058] In this way, the a replacement information recorded at the time of insertion of the optical disk drive LU _N of the optical disc OD _N on the optical disc OD _N replacement information area 2 and the spare data area 3 of the replacement data, respectively, memory 13 Can be stored in the replacement information area 23 and the replacement data area 22. When an access type SCSI command is output from the host computer 11 during the transfer of the replacement data, the SCSI command is terminated with a check condition (CHECK CONDITION) or a busy status (BUSY STATUS). Has become.

B. Transfer processing of replacement data at the time of write command (refer to the flowchart of FIG. 7)

When the write command WC is output from the host computer 11, the write data output together with the write command WC is taken into the data buffer 21 and supplied to the recording processing circuit 31 as the recording data Q ₁ . At that time, the controller 12
Thus, it is monitored whether writing to the user area 4 has failed (step S11). If not failed, it ends.

FIG. 8A shows the processing in the optical disc OD _N when a writing failure occurs. When a failure occurs (write failure X ₁ ), that is, when a defective sector occurs in the user area 4, the data to be recorded in the defective sector is set as new replacement data in the replacement sector in the replacement data area 3. Alternate recording (alternate recording X ₂ ) is performed (step S12).

Further, the address of the defective sector and the address of the replacement sector are recorded in the replacement information area 2 (replacement information recording X ₃ ) (step S13).

Next, when the new replacement data (the replacement data recorded by replacement in the replacement data area 3) is additionally stored in the replacement data area 22, it is determined whether or not there is space in the replacement data area 22. Area management table 24
(Step S14).

If there is no free space, it is registered in the other area 26 as the replacement data block ABK in the waiting state, and the processing is terminated.

If there is a vacancy, the new replacement data is transferred to the replacement data area 22, stored therein, and the process is terminated (step S15).

C. Transfer processing of replacement data at the time of read command (refer to the flowchart of FIG. 9)

When the read command RC is supplied from the host computer 11, the data recorded in the user area 4 of the optical disc OD _N is the reproduction data Q ₄
Is taken into the data buffer 21 in the controller 12. Error correction processing is performed using this data buffer 21, and the controller 12 monitors whether or not the reading of data from the user area 4 has failed (step S21). If not failed, it ends.

FIG. 8B shows the processing on the optical disk OD _N when a read failure occurs. When a failure occurs (read failure Y ₁ ), it is confirmed by the replacement information in the replacement information area 2 whether the defective sector for which the reading has failed is replaced (replacement information confirmation Y ₂ ).
(Step S22).

As a result of the confirmation, if the replacement information does not exist, an error result (ERROR RESULT) is output to the host computer 11 and the process ends (step S23).

If the replacement information exists, the replacement data corresponding to the replacement information has already been stored in the replacement data area 2
2 is checked (step S2)
4).

If it is stored in the replacement data area 22, the data corresponding to the defective sector is read from the replacement data area 22 and transferred to the host computer 11 (step S25). In this case, since the optical pickup 32 is not made to seek the alternate data area 3, the data transfer time does not become long.

If it is not stored in the replacement data area 22, for example, if the replacement data transfer processing could not be performed when the above-mentioned optical disk OD _N was inserted into the optical disk drive LU _N , the optical disk OD _N The replacement data is read from the replacement data area 3 (replacement data extraction Y ₃ ) and transferred to the host computer 11 (step S26).

After that, all the replacement data of the replacement data block ABK in which the replacement data was recorded are stored in the memory 13.
Stored in the replacement data area 22 (step S2)
7). At that time, if there is no space, as described above,
It is registered in the other area 26 as the replacement data block ABK in the waiting state, and the process ends.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various configurations can be adopted without departing from the gist of the present invention.

[0075]

As described above, according to the first aspect of the present invention, the replacement data recorded on the optical disk is stored in the storage means, so that the data of the defective sector is read during the read command. Even if the command is included, by reading the data of the defective sector, that is, the replacement data from the storage means, there is an effect that the execution time of the read command does not become long.

After all, since the replacement data is read in the storage means, the effect that the transfer of the replacement data is completed in a short time is obtained.

Further, according to the second aspect of the present invention, when the optical disc is inserted into the optical disc drive, the replacement data recorded on the optical disc is stored in the storage means. Therefore, at the time of the read command, it is stored in the storage means. The replacement data that is being read can be read, and after that, the effect that the transfer of the replacement data is completed in a short time is obtained.

Furthermore, according to the third aspect of the present invention, when new replacement data is generated on the optical disk, the new replacement data is recorded on the optical disk and then stored in the storage means. At the subsequent read command, the replacement data stored in the storage means can be read out, and the effect that the transfer of the replacement data is completed in a short time is obtained.

Furthermore, according to the fourth aspect of the present invention, when the existence of the replacement sector is known while the data recorded on the optical disk is being reproduced by the optical disk drive, the replacement data recorded in the replacement sector is stored. Since the data is stored in the storage means, the replacement data stored in the storage means can be read at the time of the subsequent read command, and the effect that the transfer of the replacement data is completed in a short time is obtained.

Furthermore, according to the fifth aspect of the present invention, the replacement data recorded on the optical disk is stored in the replacement data area of the storage means, and when the storage capacity of the data buffer area in the storage means is changed, Since the storage capacity of the replacement data area is changed according to the changed storage capacity, it is possible to obtain the effect of making a trade-off between the data transfer rate and the reading of replacement data.

Furthermore, according to the sixth aspect of the present invention, since the replacement data recorded on a plurality of optical disks is stored in the storage means, even when handling a large amount of data, a read command is issued. This has the effect that the execution time in (1) does not become long. After all, since the replacement data is read in the storage means, the effect that the transfer of the replacement data is completed in a short time is obtained.

Furthermore, according to the seventh aspect of the present invention, the replacement data recorded on the plurality of optical discs respectively inserted in the plurality of optical disc drives are stored in the storage means, and the optical discs taken out from the optical disc drive are also stored. Since the replacement data recorded in (1) is erased from the storage means, it is possible to effectively use the storage means.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of an optical disc device according to the present invention.

FIG. 2 is a block diagram showing a configuration of a main part of the optical disc device of FIG.

FIG. 3 is a diagram used to explain a change in storage capacity between a data buffer and a replacement data area.

FIG. 4A is a diagram showing a configuration of a replacement data area on an optical disc. B is a diagram showing a configuration of an alternate data area in the memory. C is a diagram used to explain the operation of the replacement data area management table.

FIG. 5 is a flowchart provided for explanation of replacement data transfer processing when an optical disk is inserted into an optical disk drive (during spin-up).

FIG. 6A is a diagram showing a configuration of an original error margin check state map. FIG. 6B is a diagram showing the configuration of the partially rewritten error margin check state map.

FIG. 7 is a flowchart provided for explaining replacement processing of replacement data when a write command is output.

FIG. 8A is a diagram used for explaining an operation when a write command is output. FIG. 6B is a diagram used to explain the operation when a read command is output.

FIG. 9 is a flowchart provided for explaining a replacement data transfer process when a read command is output.

FIG. 10 is a diagram generally provided for explaining allocation of recording surfaces of an optical disc.

FIG. 11 is a diagram used for explaining allocation of recording capacity of the optical disc shown in the example of FIG.

[Explanation of symbols]

12 controller 13 memory 22 replacement data area 24 replacement data area management table OD _N optical disk

Claims (7)

[Claims] 1. An optical disk drive for performing recording or reproduction on an optical disk, and a control means connected to the optical disk drive and a storage means, wherein the replacement data recorded on the optical disk by the control means is stored in the optical disk drive. An optical disk device characterized in that it is stored in a storage means. 2. An optical disc drive for performing recording or reproduction on an optical disc, and control means connected to the optical disc drive and a storage means, wherein when the optical disc is inserted into the optical disc drive,
An optical disk device, characterized in that replacement data recorded on the optical disk is stored in the storage means by the control means. 3. An optical disk drive for performing recording and reproduction on an optical disk, and control means connected to the optical disk drive and storage means, wherein the control means controls the replacement data recorded on the optical disk. In addition to being stored in the storage means, when new replacement data is generated on the optical disk, the new replacement data is recorded in the optical disk and then stored in the storage means. Optical disk device. 4. An optical disk drive for performing recording or reproduction on an optical disk, and control means connected to the optical disk drive and a storage means, wherein the control means controls the data recorded on the optical disk. An optical disk device, characterized in that, when the existence of a replacement sector is known during reproduction by an optical disk drive, replacement data recorded in the replacement sector is stored in the storage means. 5. An optical disk drive for performing recording or reproduction on an optical disk, storage means having a data buffer area and a replacement data area, and control means connected to the optical disk drive and the storage means. The control means stores the replacement data recorded on the optical disc in the replacement data area of the storage means, and when the storage capacity of the data buffer area in the storage means is changed, the changed storage capacity is set to the changed storage capacity. Correspondingly, the optical disk device is characterized in that the storage capacity of the replacement data area is changed. 6. A plurality of optical disc drives arranged on a plurality of optical discs for performing recording or reproduction on the optical discs, and control means connected to the plurality of optical disc drives and storage means, An optical disk device, characterized in that replacement data recorded on the plurality of optical disks is stored in the storage means by the control means. 7. A plurality of optical disc drives arranged on a plurality of optical discs for performing recording or reproduction on the optical discs, and control means connected to the plurality of optical disc drives and storage means, The control means stores replacement data recorded on the plurality of optical disks respectively inserted in the plurality of optical disk drives in the storage means, and
An optical disk device, characterized in that the replacement data recorded corresponding to the replacement data recorded on the optical disk taken out from the optical disk drive is erased from the storage means.