JPS5994243A - Optical disk processor - Google Patents

Abstract

PURPOSE:To avoid deteriorating the characteristics of large capacity not by deciding all defective sectors to the faults of hardware which are temporarily generated in a writing mode but by performing the checking after writing to decide the normal sectors. CONSTITUTION:An optical disk processor 10 reads an index ID with an instruction given from an upper device 30 and positions it to a desired sector. An ECC recorder checks whether the read-out sector has a defective pattern. Then the data of fixed length and its error correction code ECC given from the device 30 are supplied to an optical disk device 40 and also written to an optical disk medium 50 with a nondefective sector. However in case a hardware error is detected by a detecting circuit 24 during the write processing of the data of fixed length and its ECC, the data of fixed length of the written data is read. If this data has no error, the data is decided correct to complete the processing. While a defective pattern 4 is written to the written sector if the read data has an error.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an original disk processing device, and more particularly to an optical disk processing device that takes into account processing in the event of a failure of a medium or a disk device.

Conventionally, this type of optical disk processing device performs media error processing under software management, which has the drawback of taking a long processing time, as well as problems with data protection due to software abnormalities and hardware failures. It has the disadvantage that it is difficult to analyze if it affects the following.

Furthermore, due to the irreversible nature of optical disk media, this optical disk processing device has to treat the sector as defective even when a hardware failure occurs during writing, and the defective sector cannot be used. However, this has the drawback of detracting from the advantages of optical discs, which are a major feature of optical discs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-speed, highly reliable optical disk processing apparatus that eliminates the drawbacks of conventional apparatuses and also allows for the decentralization of processing apparatuses.

Another object of the present invention is to not treat all temporary hardware failures as bad sectors during writing;
It is an object of the present invention to provide an optical disk processing device which performs a check after writing and determines the sector to be normal if it is normal, and which does not impair the feature of large capacity.

According to the present invention, it is an irreversible medium in which information is recorded by changing the characteristics of the medium by an optical method or by removing a part of the medium, and each track consists of a plurality of data addresses and a physical sector address that increases by one. An optical disk processing device that uses a medium having a pregrouped ID section, an area for recording a pattern indicating a bad sector, and a data section for recording ID information, data, and ECC bytes, which are transferred from a host device. means for writing fixed length data; means for generating and writing ECC; means for reading and recognizing pregrouped track addresses and sector addresses on the medium; and means for reading and recognizing the fixed length data recorded on the medium. means for transmitting data to the device; means for reading data and ECC bytes written on the medium to detect errors; means for writing a pattern indicating that the medium is defective; and means for transmitting saved data from the host device. means for storing one sector worth of data when a fault occurs, means for detecting a hardware failure, means for recognizing a pattern written on the medium indicating that it is a bad sector, and means for writing an ID of the data section. An optical disk processing apparatus is obtained, which is characterized by comprising:

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

FIG. 1 shows a recording format of an optical disk medium used in an embodiment of the present invention. In FIG. 1, an optical disc medium has a plurality of data recording sectors N,
N+1 and alternative sector part M.

It has M+1. Each sector has 1 byte with the same ID.
1 physical track address 2 and an index (ID
) part, and a data part of data synchronization byte 5, track address/sector address 6, fixed length data 7, and error correction code (ECC) byte 8, and further includes a bad sector 7 lag indicating that the sector is bad. It has 4 areas.

This optical disk medium is coated by optical methods.
Sector addresses 3 that increase by one are pregrouped.

FIG. 2 shows an optical disc processing apparatus which is an embodiment of the present invention. In FIG. 2, this optical disk 5-processing device 10 is connected to a host device 30.

Furthermore, it is connected to an optical disk device 40 that directly records on and reproduces information from an optical disk medium 50. This optical disk processing device 10 includes a data transfer and data buffer circuit 14 that processes fixed length data transferred from a host device 30, and an error correction code (ECC) according to the fixed length data from the buffer circuit 14 during writing. '1ii7 generating circuit 15, a fixed-length data buffer and control circuit 16 that stores one sector worth of data when reading or writing, and an error correction code detection (ECC) decoder that checks for errors in read data. 17 and the data when reading E
an error correction circuit 13 corrected by a CC decoder;
Microprocessor 2 that controls the format on the media
Including 0. The microprocessor 20 has means for reading and recognizing the ID, means for recognizing a bad sector pattern, and means for writing the ID of the data section.

Furthermore, this optical disk processing device 10 includes a plurality of selection circuits 1.
1 * 12 + 18 + 19, a conversion circuit 21 that converts data into serial-parallel, 6- and parallel-serial, a modulation circuit 22 that sends data to the optical disk device 40, and data from the optical disk device 40. The optical disc device 40 includes a demodulation circuit 23 that demodulates the optical disc device 40, and a hardware error detection circuit 24 that detects errors in the optical disk device 40. The selection circuit 11 is the host device 3
The 1 selection circuit 12 is a circuit that selects data 101 from 0, data 102 from the microprocessor 20, and modified data 105 at the time of writing.The 1 selection circuit 12 selects 1 sector data 104 at the time of writing or modified data 105 at the time of writing. The selection circuit 18 is a circuit that selects one sector of data 106 during writing or the data 107 during reading, and the selection circuit 19 selects data from the host device during writing and generation based on this data. This is a circuit that selects ECC by 1.

Next, the 1-input operation of this embodiment will be explained with reference to FIG. 3. The optical disc processing device 10 of this embodiment positions the sector at the III reading opening based on a command from the host device 30. The '1Ecc recorder 17 detects whether or not there is a bad sector pattern in the read target sector, and if it is not a bad sector, the fixed length data and its error correction code (FCC) from the host device 30 are directly sent to the selection circuit 19. The signal is supplied to the optical disk device 40 via the parallel conversion circuit 21 and the modulation circuit 22, and written from the optical disk device 40 to the original disk medium 50.

Hardware error detection circuit 2 during write operation to this medium
If it is not detected in step 4, the write operation ends. However, the data and its error correction code (FCC) cannot be transferred to the medium 5.
If the detection circuit 24 detects a hardware error during writing to 0, the fixed length data of the written sector is read, and if no error occurs in the data, the written data is assumed to be correct. The process ends. 1+ If a defect 2- occurs in the read data, a defective pattern 4 is written in the written sector.

The data written to the bad sector in this way is written to the alternative sector again, but the alternative sector has 1
The data from the buffer circuit 16 in FIG. 2 stored for sectors is written, and the ID Q
It is also written to the data section.

On the other hand, when IDE reading, an edge positioned in the target sector, or a bad sector pattern is detected, an unused alternative sector is searched and data from the host device and its error correction code (ECC) are written to the alternative sector. It's crowded.

Next, in the alternative sector written by Bootara, the written data is checked for errors in the same manner as described above, and if there is no read error as a result of this check, the process is terminated. If a read error occurs, a bad sector pattern is written in an alternative sector. Similarly, the same process is continued for other alternative sectors, and if there is no usable alternative sector, an abnormality report is sent to the higher-level device.

Next, the read operation of this embodiment will be explained with reference to FIG. 4. The optical disk processing device 10 searches for a target sector based on a read command from the host device 30. If there is no defective pattern 9- in the target sector, the data is read from the medium 50, transferred to the host device, and the process is completed.

If the target sector has a defective pattern, a replacement sector is searched for and the detected sector address of the replacement sector is compared with the ID of the data section of the replacement sector. As a result of this comparison, if they match, the data in the alternative sector is read, the data is transferred to the host device, and the process ends.

Also, if the sector address and the ID of the alternative sector data section do not match, the same process is performed for other alternative sectors, and if there is no data section with the same sector address in the other alternative sectors, the process ends abnormally and the host device receives an error. Report.

In this embodiment, there is no need to consider software errors, and only a normal routine needs to be created, and an extremely simple system program can be prepared. Furthermore, since this embodiment does not require a software/hardware interface, the processing time is significantly improved.

Furthermore, this embodiment can sometimes be used to overcome tempo 2 failures during writing, and can be fully utilized without reducing capacity.

As described above, the present invention has the effects of shortening the processing time for temporary errors, preventing the capacity from decreasing, and simplifying the creation of software.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a recording format on a medium used in an embodiment of the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a diagram showing a recording format in an embodiment of the present invention. FIG. 4 is a diagram showing a processing flow for an error at the time of reading in an embodiment of the present invention. 10... Optical disk processing device, 11.12.1
8119... Selection circuit, 13... Error correction circuit, 14... Buffer circuit, 15...
...Error correction code (ECC) generation circuit, 16.
...Buffer and control circuit, 17...
ECC decoder, 20... microprocessor, 21... conversion circuit, 22... modulation circuit, 23... demodulation circuit, 24... No.1
- Douware error detection circuit, 30... Host device, 40... Optical disk device, 50...
Optical disc media.

Claims (1)

[Claims] An irreversible medium in which information is recorded by changing the characteristics of the medium using an optical method or by removing part of the medium.Recording an ID section consisting of a regrooved physical track address and a physical sector address, and a pattern indicating a bad sector. A source disk processing device using a medium having an area for recording ID information, data, and a data section for recording ECC bytes, a means for writing fixed length data transferred from a host device, and a means for generating and writing ECC. means for reading and recognizing pregrouped track addresses and sector addresses on the medium; means for reading fixed length data recorded on the medium and transferring it to a host device; FCC buy)? Reading process 2 - means for detecting, means for writing a pattern indicating that the medium is defective, and when writing data from the host device is transferred 1
It includes means for storing data for a sector, means for detecting a hardware failure, means for recognizing a pattern written on the medium indicating a bad sector, and means for writing an ID of the data section. An optical disk processing device characterized by: