JP2589378B2 - Magneto-optical disk processing unit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data rewritable magneto-optical disk processing apparatus.

[Conventional technology]

In the conventional magneto-optical disk processing apparatus, since the recording capacity of the magneto-optical disk medium is large and the magneto-optical disk medium is an exchangeable medium, the sector that has been written in the verify check operation after data writing has been used. Is detected, the data in the group replacement sector area assigned to the group consisting of a plurality of sectors including the sector is replaced with the data to be written to the defective sector by the replacement source and the replacement destination. In addition to writing with a pointer indicating an address, information indicating the relationship between the replacement source sector and the replacement destination sector is written in the replacement information map area, and normal writing can be performed even using the group replacement sector area. If the defect cannot be found, the sector in the alternate track area provided for the entire area of the magneto-optical disk That the data tries to write to the sector with writing by adding a pointer to the replacement source and replacement destination address, so that writing information showing the relationship between the exchange sector and alternate co sector replacement information map area.
If normal writing could not be performed using the replacement track area, the user is notified that the magneto-optical disk medium is unusable.

[Problems to be solved by the invention]

Conventionally, as described above, when normal writing could not be performed using the alternate track area, the user was only notified that the magneto-optical disk medium was unusable. There is a problem that the medium cannot be replaced by detecting the deterioration of the medium at an early stage, or the medium cannot be cleaned by detecting the contamination of the medium.

SUMMARY OF THE INVENTION An object of the present invention is to improve the reliability of a magneto-optical disk processing device by enabling early detection of deterioration and dirt on a magneto-optical disk medium.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a magneto-optical disk processing device for writing and reading data to and from a magneto-optical disk medium 1 as shown in the block diagram of FIG. An error management area 2 in which the number of times of occurrence of an error and the number of error sectors are registered is provided. At the time of writing data, a write error in a new sector is detected, so that the number of error sectors registered in the error management area 2 is determined. A read error detecting unit 3 for updating the number of times of error registration registered in the error management area 2 by detecting a read error when reading data; and Determining means for determining whether or not the number of error occurrences and the number of error sectors registered in step 2 exceed a specified value It is provided with a door.

(Operation)

The magneto-optical disk medium 1 is provided with an error management area 2 in which the number of times of error occurrence and the number of error sectors are registered. The write error detecting means 3 detects a write error for a new sector when writing data,
The number of error sectors registered in the error management area 2 is updated, and the read error detection unit 4 updates the number of times of error registration registered in the error management area by detecting a read error when reading data. The determination means 5 determines whether the number of times of error occurrence and the number of error sectors registered in the error management area 2 exceed specified values.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention. The microprocessor 21, a host system 22, a host interface 23, a selector 24, a data buffer 25 for temporarily storing write data and read data, An error correction encoder 26 for adding an error correction code to data, and an error correction using the error correction code, and the number of bytes in one corrected block and the pattern of the data in the block that has been subjected to the error correction processing are changed. An error correction decoder 27 that sends information indicating to the microprocessor 21 whether it is a special short pattern, an empty pattern, or another pattern, which will be described later.
, A modulation circuit 28, a demodulation circuit 29, a sector format control circuit 30, a drive interface 31, a drive device 32, a magneto-optical disk medium 33, a read position, a flag write timing, a flag detection window, etc. And a sector timing control circuit 34 which is added to the modulation circuit 28, the demodulation circuit 29, and the sector format control circuit 30.

FIG. 3 is a format diagram of the storage area of the magneto-optical disk medium 33. The control test areas 41-1 and 41-2, the replacement information map area 42, the error management area 43, and the user area 44
-1 to 44-n and group replacement sector areas 45-1 to 45- provided corresponding to the user areas 44-1 to 44-n.
n and a replacement track area 46.

The control test areas 41-1 and 41-2 are areas for recording the type of medium (write-once type, rewritable type), signal polarity, write power, rotation speed, modulation mode, sector / track, etc., and a plurality of recording test tracks. Consists of The user areas 44-1 to 44-n are areas for writing data transferred from the host system 22, and if there is no defect in the user area, all write data is written to the user area. The replacement information map area 42 includes user areas 44-1 to 44-n.
Is defective and the group replacement sector areas 45-1 to 45-n
Or, when data is written in the replacement track area 46,
This area records information related to the replacement process. The group replacement sector areas 45-1 to 45-n correspond to the user areas 44-1 to 45-n.
The replacement area is used first when there is a defective sector in 44-n, and the replacement track area 46 is used when the corresponding group replacement sector area 45-1 to 45-n has been used. This is a replacement area.

FIG. 4 is a format diagram of a sector on the magneto-optical disk medium 38. As shown in FIG.
Is composed of an ID (address) section 52, a flap section 53, and a data section 54. The data section 54 includes an address pointer (AP) 54-1 and an error correction code (ECC) 54-2, and the address pointer 54-1 of a sector on the user areas 44-1 to 44-n is As shown in FIG. 7B, the self physical address 55 and the replacement destination physical address 56 are recorded, and the address pointer 54-1 of the sector on the group replacement sector areas 45-1 to 45-n and the replacement track area 46 is recorded. The self physical address 57 and the replacement source physical address are recorded as shown in FIG.

FIG. 5 is a diagram showing the storage contents of the replacement information map area 42. One replacement map information 61 stored in the replacement information map area 42 is composed of a replacement physical address 62 and a replacement physical address 63. Is done. In this embodiment, the replacement co-physical address 62 and the replacement destination physical address 63 are both written in quadruple.

FIG. 6 is a diagram showing information written to the error management area 43. The flag 71 indicates that the certification process has not been executed, is being executed, or has been completed, a certification address 72,
The number 73 of defective sectors detected at the time of the certify processing, the number 74 of error sectors detected at the time of write processing, and the number 75 of errors occurring at the time of read processing are written.

7 to 10 are flowcharts showing processing examples of the microprocessor 21, and the operation of the present embodiment will be described below with reference to the drawings.

 First, the write operation will be described with reference to FIG.

After outputting the write command, the host system 22 outputs the write data. The write command is applied to the microprocessor 21 via the host interface 23, and the write data is stored in the data buffer 25 via the host interface 23 and the selector 24. The write instruction includes the physical address of the first sector to be written and the number of blocks of data to be written (one block and one sector correspond to each other). 21 first determines whether or not the replacement information stored in the replacement information map area 42 of the magneto-optical disk medium 23 has been read (step S1). If it is determined that the replacement information has not been read, the replacement information stored in the replacement information map area 43 is read and stored in an internal memory (not shown) (step S2).
The process of S3 is performed, and if it is determined that the data has been read, the process of step S3 is immediately performed. Replacement information map area
When reading the information of 42, the microprocessor 21 causes the drive device 32 to move the head onto the replacement information map area 42 via the drive interface 31, and reads the replacement information written in the replacement information map area 42. To indicate that As a result, the drive device 32 is
The replacement information stored in the replacement information map area 42 is read from the replacement information map 33, and the read replacement information is transferred to the data buffer via the drive interface 31, the sector format control circuit 30, the demodulation circuit 29, the error correction decoder 27, and the selector 24. The microprocessor 21 reads the data through the replacement information selector 24 stored in the data buffer 25 and stores the read data in the internal memory.

Next, in step S3, the microprocessor 21 determines whether or not the information indicating the address of the sector (primary sector) in the user area to which the data is to be written this time exists in the replacement information stored in the internal memory. I do. If it is determined that the original sector does not exist, the erasing process is performed on the source sector (step S4). If it is determined that the source sector is present, the address of the source sector is recorded in the group replacement sector area or the replacement track area. Erase processing is performed on the sector (replacement sector) (step S5).

When the processing in step S4 is performed, the microprocessor 21 writes data to the source sector (step S6), and when the processing in step S5 is performed,
Write data to the replacement sector (step
S7). When writing data to the original sector or the replacement sector, the microprocessor 21
The address of the sector to which the data is to be written is notified to the drive device 32 via 31 and the write data for one block is read from the data buffer 25. The write data read from the data buffer 25 is added with an error correction code by an error correction encoder 26, is applied to a sector format control circuit 30 through a modulation circuit 28, and is formatted in the sector format control circuit 30. After that, the drive device 31 through the drive interface 31
The data is sent to a predetermined position on the magneto-optical disk medium 33. When writing data, if there is a defect 52 'in the ID section 52 of the sector to which data is to be written as shown in FIG. 11, a special short pattern 55 shorter than the original data is written in the data section 54. Write (steps S8, S9). The writing of the special short pattern is performed when the head of the drive device 32 comes over a sector to which data is to be written (the ID portion is defective and the head attempts to write data based on the contents of the ID portion). Since it is not possible to judge whether or not the data has come over the sector that has been written, the head immediately before the sector to which data is to be written is detected, and when the next sector is detected, the head writes the data. This is performed by adding a special short pattern output instruction to the sector format control circuit 30, and the sector format control circuit 30 changes the special short pattern by adding the output instruction. The special short pattern output from the sector format control circuit 30 is applied to the drive device 32 via the drive interface 31, and the ID portion is output. It is written to the defective sector.

When the writing of the write data or the special short pattern is completed, the microprocessor 21 performs a verify check operation to determine whether or not the written data has an error and determine whether or not the written data is the special short pattern. Is determined (step S10). In this verify check operation, the microprocessor 21
Is the drive device 32 via the drive interface 31
Is added to the address of the sector in which the data was written,
Instructs data reading. As a result, data of one designated block is read from the magneto-optical disk medium 33, and the error correction decoder 2 is transmitted via the drive interface 31, the sector format control circuit 30, and the demodulation circuit 29.
Added to 7. The error correction decoder 27 performs an error correction process on the added data of one block, and adds the microprocessor 21 to the number of bytes on which the error correction process has been performed. Information indicating whether the pattern is a pattern, an empty pattern, or another pattern is added to the microprocessor 21. The microprocessor 21 determines whether a verify error has occurred based on whether the number of bytes subjected to error correction added from the error correction decoder 27 exceeds a predetermined threshold value.

If it is determined in step S10 that neither a bell-phi error nor a special short pattern has occurred, that is, if data writing has been performed normally, the microprocessor 21 determines whether or not there is unwritten data. (Step S33), and if it is determined that there is, step S
Returning to the process of 3, if it is determined that there is not, the process is terminated. If it is determined in step S10 that the pattern is a verify error or a special short pattern, the number of error sectors 74 at the time of writing written in the error management area 43 is incremented by 1 (step S11), and the value is determined in advance. It is determined whether or not the specified value has been exceeded (step S12). If it is determined in step S12 that the number of error sectors 74 has become equal to or greater than a predetermined value, the microprocessor 21 sets a warning status therein and sets the host interface 23.
The host system 22 is notified of the prohibition of writing to the user areas 44-1 to 44-n of the magneto-optical disk medium 33 thereafter (step S34). In this embodiment, when the number of error sectors 74 becomes equal to or more than the specified value, write prohibition is notified to the host system 22. However, a request for replacing a magneto-optical disk medium, a request for cleaning, and the like are sent to the host system 22. Alternatively, it may be performed. Also step
If it is determined in S12 that the number of error sectors 74 is not above the specified value, data is written to the sectors in the group replacement sector area (step S13), and it is determined that there is an error in the ID section during the write operation. Writes a special shoot pattern (steps S14, S15). Thereafter, a verify check operation is performed to determine an error and to determine whether the written data is a special short pattern (step S16).

If it is determined in step S16 that the error is neither a verify error nor a special short pattern, the microprocessor 21 stores replacement information indicating the content of the replacement process executed in the replacement information map area 42 on the internal memory and the magneto-optical disk medium 33. Write (step S29). Replacement information map area 4
When the replacement information is written in the second physical address 62 and the replacement physical address 63 in this embodiment, as shown in FIG.
Is written four times. When the processing in step S29 is completed, the microprocessor 21 performs a verify check operation, and determines whether or not two or more of the replacement source physical address 62 and the replacement destination physical address written in quadruple in step S29 are correct (step S29). Step S30). And step S
If the determination result of 30 is NO, the microprocessor 21 performs the process of step S34, and if the determination result is YES, the number of error sectors 74 written in the error management area 43 of the magneto-optical disk medium 33 is increased by +1. Then (step S31), it is determined whether or not the value exceeds a predetermined value (step S32). Then, when it is determined that the value exceeds the specified value, the process of step S34 is performed, and when it is determined that the value is not exceeded, the process of step S33 is performed.

If it is determined in step S16 that the error pattern is a verify error or a special short pattern, the microprocessor 21 increments the number 74 of error sectors written in the error management area 43 by 1 (step S17), and then sets the value in advance. It is determined whether or not a predetermined value is exceeded (step S18). If it is determined in step S18 that the value is equal to or larger than the specified value, the process in step S34 is performed. If it is determined that the value is not equal to or larger than the specified value, data is written to the next sector in the group replacement sector area. (Steps S19, S20, S13). If data writing is not successful even when all sectors in the group replacement sector area are used (when the determination result in step S20 is NO),
The microprocessor 21 moves the head of the drive device 32 onto the replacement track area 46, and writes data to the sectors in the replacement track area 46 with the MSB justified (step S2).
1). Also when writing data to the sector in the replacement track area 46, if there is an error in the ID part, a special short pattern is written (steps S22 and S23). The short pattern is determined (step S24). If it is determined that the pattern is not a verify error or a special short pattern, the process proceeds to step S29, where the verify error or
If it is determined that the pattern is a special short pattern, the number of error sectors 74 written in the error management area 43 is incremented by 1 (step S25), and it is determined whether or not the value is equal to or greater than a predetermined value. A judgment is made (step S26). When it is determined in step S26 that the value is equal to or more than the specified value, the process in step S34 is performed.
A data write process is performed on the sector next to the first sector (steps S27 and S21). Then, the predetermined number of replacement track areas 4
If writing cannot be performed normally even when writing is performed on sector 6 (when the determination result in step S28 is YES), the processing in step S34 is performed.

Next, the operation at the time of reading data will be described with reference to FIG.

The read command output from the host system 22 is applied to the microprocessor 21 via the host interface 23. The read instruction includes the address of the first sector to start reading and the number of blocks to be read. When the read instruction is added, the microprocessor 21 starts the processing shown in the flowchart of FIG. First, it is determined whether or not the replacement information written in the replacement information map area 42 of the magneto-optical disk medium 33 has already been read and stored in the internal memory (step S41).
If it is determined that the replacement information has not been read, the replacement information written in the replacement information map area 42 of the magneto-optical disk medium 33 is read and stored in the internal memory (step S4).
2) Instruct the drive device 32 via the drive interface 31 to read the data by adding the address specified by the read command (step S43). If it is determined that the data has been read, the process in step S43 is immediately performed. Do. By performing the process of step S43,
The door rib device 32 reads one data from the magneto-optical disk medium 33.
The data for one block is read, and the read data for one block is supplied to a drive interface 31, a sector format control circuit 30, a demodulation circuit 29, an error correction decoder 27, and a selector 2.
Stored in the data buffer via 4. The error correction decoder 27 performs error correction on the added data of one block, and indicates the number of bytes and the data pattern for which the error correction has been performed, whether it is a special short pattern, an empty pattern, or another pattern. Is added to the microprocessor 21.

When the microprocessor 21 completes the process of step S43, the sectors in the user areas 44-1 to 44-n which have performed the current reading process based on the information indicating the pattern of the data transmitted from the error correction coder 27 are determined. It is determined whether or not the sector is an empty sector (step S44). If it is determined that the sector is an empty sector, based on the information further indicating the number of error-corrected bytes sent from the error correction decoder 27, the information is further transmitted. Then, it is determined whether or not the sector that has been read this time is an error sector, and whether or not a special short pattern is written in the sector based on information indicating a data pattern (step S4).
Five). If it is determined in step S45 that the sector that has been read this time is not an error sector and that the written data is not a special short pattern, the replacement information written in the internal memory is examined. Then, it is determined whether or not the address of the sector that has been read this time is present in the replacement information (step S47). When an error occurs in the operation of reading the replacement information, reading of all the replacement areas is performed, and the corresponding sector is searched.

If it is determined in step S47 that the data does not exist in the replacement information, the data of one block read this time stored in the data buffer 25 is transferred to the host system 22 via the selector 24 and the host interface 23. (Step S52). If it is determined in step S47 that the data is present in the replacement information, the data written in the replacement sector in which the address and the address of the sector in the user area that has been read this time are registered in correspondence with each other are read. The reading is instructed to the drive device 32 via the drive interface 31 (step S48). Thus, data is read from the magneto-optical disk medium 33 and stored in the data buffer 25 in the same manner as described above. At this time, based on the information indicating the data pattern output from the error correction decoder 27, the microprocessor 21 determines whether or not the replacement sector that has performed the current reading process is an empty sector (step S49). If it is determined that the sector is an empty sector, the status indicating the empty sector is reported to the host system 22 via the host interface 23. When it is determined that the replacement sector is not an empty sector, it is determined whether or not the replacement sector that has been read this time is an error sector based on the information indicating the number of bytes subjected to error correction sent from the error correction decoder 27. In addition to the determination, it is determined whether or not a special short pattern has been written in the sector based on the information indicating the pattern of the data sent from the error correction decoder 27 (step S50).

If it is determined in step S50 that the data is not an error sector and that the written data is not a special short pattern, that is, if the data is read normally, the data is read from the replacement sector and the data buffer is read. The data stored in 25 is replaced with the data in the source sector and transferred to the host system 22 (steps S51 and S5).
2). Thereafter, the microprocessor 21 determines whether or not there is unread data in the data specified by the read command (step S53). When it is determined that there is no data, the process ends, and it is determined that the data exists. If so, the process returns to step S43, and the data written in the next sector is read. Step S50
If it is determined in step (1) that the error sector or the written data is a special short pattern, that is, if the data reading process cannot be performed normally, the reading process for the replacement sector is performed again (step S65) As a result, if the data can be read normally from the replacement sector (if the determination result of step S66 is YES), the process of step S51 is performed. If the data cannot be read normally, It is determined whether the retry has been performed a predetermined number of times (step S67).

If it is determined in step S67 that the retry has been performed the predetermined number of times, the number of times of error 75 during reading written in the error management area 43 is incremented by 1 (step S6).
8) Then, it is determined whether or not the number of times of error occurrence 75 exceeds a predetermined number (step S6).
9). If it is determined in step S69 that the number does not exceed the specified number, the processing is abnormally terminated.If it is determined that the number exceeds the specified number, the microprocessor 21 sets a warning status therein and sets the host interface 23 After notifying the host system that the magneto-optical disk medium 33 will not be used thereafter (step S70), the process is terminated abnormally.

If it is determined in step S44 that the sector on the user area 44-1 to 44-n which has performed the current reading process is an empty sector, and if the sector is an error sector or the sector is determined in step S45. If it is determined that the written data is a special short pattern,
The microprocessor 21 checks the replacement information stored in the internal memory (step S54), and determines whether or not the address of the sector exists in the replacement information (step S5).
Five). When it is determined that the address of the sector is present in the replacement information, the drive device 32 via the drive interface 31 instructs the drive device 32 to read data from the replacement sector in which the address of the sector is registered in correspondence with the address. An instruction is given (step S56). This allows
The data written in the replacement sector is read from the magneto-optical disk medium 33 and stored in the data buffer 25 in the same manner as described above. At this time, the microprocessor 21 checks whether the reading of data from the replacement sector has been performed normally based on the number of bytes subjected to the error correction process and the information indicating the data pattern output from the error correction decoder 27. It is determined whether or not it is (step S57). If it is determined that the data reading has been performed normally (if the determination result in step S57 is NO), the process proceeds to step S51.
If it is determined that the replacement was not performed normally, the read process for the replacement sector is performed again (step S58). Then, as a result of the retry, when it is determined that the data has been read normally (step S59)
If YES, the process of step S51 is performed. If the data cannot be read normally even after retrying a predetermined number of times (when the determination result of step S60 is YES), the process of step S68 is performed. Perform

Also, in the replacement information stored in the internal memory in step S55, the user area 44-1 which has been read this time is displayed.
If it is determined that the address of the source sector on .about.44-n does not exist, it is determined whether or not the source sector is an empty sector (step S61). If it is determined that the source sector is an empty sector, the host interface 23 is turned off. Through the host system 22
Is notified of the empty sector, and if it is determined that the sector is not an empty sector, the read process is performed again on the original sector (step S62). as a result,
If the data can be read normally (if the determination result in step S63 is YES), the process in step S51 is performed, and if the data cannot be read normally even after performing the retry a predetermined number of times (step S63). If the result of the determination in S64 is YES), the processing in step S68 is performed.

Next, the operation at the time of data erasure will be described with reference to FIG.

An erase command from the host system 22 is applied to the microprocessor 21 via the host interface 23.
The erase command includes an address of a sector for erasing data.When the erase command is added, the microprocessor 21 first reads the replacement information written in the replacement information map area 42 into the internal memory. It is determined whether or not there is (step S71). If it is determined in step S71 that the replacement information has not been read, the map S21 reads the replacement information from the replacement information map area 42 (step S7).
2), the process of step S73 is performed, and if it is determined that the replacement information has already been read, the process of step S73 is immediately performed. In step S73, the microprocessor 2
1 performs erasure processing on the sector specified by the erasure command, and then checks the replacement information stored in the internal memory (step S74), and determines whether the address included in the erasure command exists in the replacement information. Is determined (step S75). If it is determined that the replacement information does not exist in the replacement information, the process is terminated. If it is determined that the replacement sector exists, the replacement sector in which the address included in the erase instruction is registered corresponding to the address is included. Is performed (step S76), and then the process ends.

Next, the certification operation will be described with reference to FIG.

A certify command from the host system 22 is applied to the microprocessor 21 via the host interface 23. The certify instruction includes information indicating the number of user areas for performing the certify process, and when the certify instruction is added, the microprocessor 21
The process shown in FIG. 10 is started, and first, the replacement information map area
It is determined whether or not the replacement information written in 42 has been read into the internal memory (step S81). If it has not been read, the replacement information map area 42 is read (step S82), and then the process of step S83 is performed. If it has been read, the process of step S83 is immediately performed.

In step S83, the flag 71 indicating the non-executing, executing, and execution completion of the certifying process written in the error management area 43 is read, and in the next step S84, based on the flag 71 read in step S83. It is determined whether or not the certification process has been executed. If it is determined that the processing has been executed, the microprocessor 21 ends the processing.If it is determined that the processing has not been executed, the microprocessor 21 determines whether the certification processing has not been executed based on the flag 71 read in step S83. Is determined (step S85).
If it is determined in step S85 that the certification processing has not been executed, the start address of the first user area is set as the certification address, and the flag 71 in the error management area 43 indicates that the certification processing is being executed. (Steps S86, 87). Step S8
If it is determined in 5 that the certification process is not yet executed, that is, if it is determined that the certification process is being executed, the certification address 72 is read from the error management area 43 (step S88).

Next, the microprocessor 21 reads a sector indicated by the certify address set in step S86 or the certify address read in step S88 (step S89), and determines whether or not the sector is an empty sector (step S90). ). If it is determined in step S90 that the sector is not an empty sector, it is determined whether the sector is an error sector or a sector in which a special short pattern is written (step S9).
1). If it is determined in step S91 that the sector is neither an error sector nor a sector in which the special short pattern is written, that is, if it is determined that the sector is a normal sector, the user specified by the certify command is determined. It is determined whether the certification process for the area has been completed (step S102). If it is determined in step S102 that the certifying process for the user area specified by the certifying command has not been completed, the certifying address is incremented by 1 (step S106), and whether or not the certifying address is an address in the user area (Step S1
07) If it is determined that the address is in the user area, the process returns to step S89. If it is determined that the address is not in the user area, the head address of the next user area is set as the certify address (step S108). ),
The process returns to step S89. If it is determined in step S102 that the certify processing for the user area specified by the certify command has been completed, it is determined whether the certify processing for all user areas on the magneto-optical disk medium 33 has been completed ( Step S103). If it is determined that the certification process has been completed for all user areas, the error management area
After setting the flag 71 in 43 to indicate the completion of the certify process (step S104), the process is terminated, and if it is determined that the certify process for all user areas has not been completed, the certify address is set to the next user. After setting the start address of the area (step S105), the processing is terminated.

If it is determined in step S91 that the sector is an error sector or a sector in which a special short pattern has been written, the replacement information written in the internal memory is checked (step 92). It is determined whether there is a correspondingly written replacement sector (step S93). If it is determined that the replacement sector does not exist, the number of defective sectors 73 in the error management area 43 is determined.
Is incremented by 1 (step S94), it is determined whether or not the number 73 of defective sectors has exceeded a specified number (step S95). Then, when it is determined that the number is equal to or more than the specified number, a warning status is notified to the host system 22 via the host interface 23 (step S113), and the processing ends abnormally.
If it is determined that the specified number is not abnormal, step S1
Perform the processing of 02. If it is determined in step S93 that a replacement sector exists, the replacement sector is read (step S109), and then the replacement sector is an error sector or a sector in which a special short pattern is written. Is determined (step S11).
0). If it is determined in step S110 that the error sector or the special short pattern has been written, the number of defective sectors 73 written in the error management area 43 is incremented by 1 (step S111). Number of sectors
Determine whether 73 is greater than or equal to the specified value (step
112), if it is determined that the value is equal to or more than the specified value, a warning status is notified to the host system 22 via the host interface 23 (step S113). If it is determined in step S110 that the replacement sector is a normal sector, the process of step S102 is performed. If it is determined in step S91 that neither the error sector nor the sector in which the special short pattern is written,
The processing of S102 is performed.

If it is determined in step S90 that the sector read in step S89 is an empty sector, a process of writing certification data to the sector is performed (steps S96 and S97). In writing the certification data in step S97, if there is an error in the ID part, a special short pattern is written. Then the microprocessor
21 performs a verify check operation to determine whether there is an error in the data written in step S97 or whether a special short pattern has been written (step S97).
S98). If it is determined in step S98 that the sector is a sector in which a verify error or a special short pattern has been written, a process of writing certification data is performed on a replacement sector (step S99). At that time, ID
If there is an error in the section, write a special short pattern.

Upon completion of the process in the step S99, the microprocessor 21 performs a verify check operation, and a step S99
It is determined whether there is an error in the data written in step S99 and whether the data written in step S99 is a special short pattern (step S100). And
If it is determined in step S100 that the write operation has been performed normally, the process of step S102 is performed,
If it is determined that the data cannot be normally written, the certifying data is written to the next replacement sector (steps S99 and S101). If the data cannot be normally written even if the data for certification has been written to all the sectors in the group replacement sector area, the host system 22 is connected via the host interface 23. Is notified of the warning status, and the processing is terminated.

〔The invention's effect〕

As described above, according to the present invention, an error management area for registering the number of selectors in which a write error has occurred and the number of read errors has been registered on the magneto-optical disk medium, and the number of error sectors and the number of error occurrences must be specified. Since it is provided with a judgment means for judging whether or not the recording is performed, it is possible to detect deterioration and dirt of the magneto-optical disk medium earlier than in the conventional example, and to improve the reliability of recorded data. There is an effect that can be done.

[Brief description of the drawings]

1 is a block diagram of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a format diagram of a storage area of a magneto-optical disk medium, FIG. 4 is a format diagram of a sector, FIG. FIG. 6 shows the storage contents of the replacement information map area, FIG. 6 shows the storage contents of the error management area, FIG. 7 is a flowchart showing a processing example at the time of writing processing, and FIG. 8 is a processing example at the time of reading processing. FIG. 9 is a flowchart showing an example of processing at the time of erasing processing, FIG. 10 is a flowchart showing an example of processing at the time of certifying processing, and FIG. 11 is a writing content of a sector when the ID part has a defect. FIG. In the figure, 1,33... Magneto-optical disk medium, 2,43... Error management area, 3... Write error detection means, 4... Read error detection means, 5. Processor, 22 Host system, 23 Host interface, 24 Selector, 25 Data buffer, 26 Error correction encoder, 27 Error decoder, 28 Modulation circuit, 29 Demodulation circuit, 30 ...
Selector format control circuit, 31 drive interface, 32 drive device, 41-1, 41-2 control test area, 42 replacement information map area, 44-1 to 44
-N ... user area, 45-1 to 45-n ... group replacement sector area, 46 ... replacement track area.

Claims (1)

(57) [Claims] 1. A magneto-optical disk processing apparatus for writing and reading data to and from a magneto-optical disk medium, wherein the magneto-optical disk medium has an error management area for registering the number of times of error occurrence and the number of error sectors. A write error detecting means for updating the number of error sectors registered in the error management area by detecting a write error for a new sector when writing data; and detecting a read error when reading data. Reading error detecting means for updating the number of error occurrences registered in the error management area, and determining whether or not the number of error occurrences and the number of error sectors registered in the error management area exceed prescribed values A magneto-optical disk processing apparatus, comprising: