JPH02205914A - Optical disk processor - Google Patents

Abstract

PURPOSE:To perform the high speed processing by recording and reproducing information in and from a disk-shaped storage medium with a first microprocessor and recording and reproducing information in and from a storage means independent of the storage medium with a second microprocessor. CONSTITUTION:When the read operation will be executed with a first microprocessor 9, a second microprocessor 12 checks whether pertinent data exists in a semiconductor memory or not; and when this data exists there, the second microprocessor 12 interrupts the first microprocessor 9 to transfer data on the semiconductor memory to a host system in place of the first microprocessor 9. When the second microprocessor 12 cannot find pertinent data in the semiconductor memory, data read out by the first microprocessor 9 is recorded on the semiconductor memory through a bus selector circuit 3 by the second microprocessor 12 itself. Thus, the microprocessor which fast finds pertinent data transfers data, and the high speed processing is possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc processing device for recording and reproduction, and more particularly to an optical disc processing device that processes data at high speed.

[Conventional technology]

In conventional optical disk processing devices, because the optical disk medium has a large storage capacity and is a replaceable medium, a verify operation is performed after information is written, and if a defective sector is detected, a verification operation is performed on the defective sector. Writing is performed in a replacement sector area allocated to a group, and a replacement sector is allocated to an error source sector during writing or reading using a pointer or address map indicating the self address, replacement destination, and replacement source address.

A conventional example will be explained with reference to FIG. A write command from the host system 21 is sent to the first micro bromo via the host interface control circuit 22.
9. The first microprocessor 29 instructs the optical disk drive 28 head to move to the specified address through the tribe interface circuit 27. Write data is stored in data buffer circuit 24 through host interface control circuit 22. Next, the write data in the data buffer circuit 24 is encoded by the error correction circuit 25, added with an error correction code, and transferred to the modulation/demodulation circuit 26. A write format is generated by the sector format control circuit 30 and sent to the optical disk drive device 28 via the drive interface circuit 27.

After execution of the write operation, a verify check operation is performed with the data stored in the data buffer circuit 25. If there is any abnormality during this verify operation, replacement sector processing will be performed.

When a read command is received from the host system, it instructs the optical disk drive device 28 to move the optical head, similar to a write operation. The read data is
The data portion and the address (ID) portion are recognized by the sector format control circuit 30 via the interface circuit 27 and demodulated by the modulation/demodulation circuit 26. The sector format control circuit 30 generates timings such as write and read positions, and the modulation/demodulation circuit 26 . Error correction circuit 2
Send to 5. The read data is sent to an error correction circuit,
The error correction code is used to calculate the error occurrence position and error pattern, and if there is an error, a correction operation is performed. In the decoding operation of the error correction circuit 25, defective data is checked in the verify operation after the write operation under stricter conditions than in the read operation. The data after error correction is stored in the -degree data buffer circuit 24. In the read operation, if there is no error in the read data, the read data is transferred to the host system 21 through the host interface control circuit 22. If there is an error in the read data after error correction, the optical head is moved to a replacement sector area, the corresponding sector is searched, and the data in the corresponding sector is transferred to the host system.

If an error is detected in the verify operation after the write operation, a replacement write process is executed to the replacement sector area.

[Problem to be solved by the invention]

In the above-mentioned conventional optical disk processing device, a replacement process for a defective sector is performed by adding and writing a pointer indicating the replacement destination address and replacement address to the data section, and the relationship between the defective original sector and the replacement sector is mapped to the replacement information map. A method of writing data into an area is used, and if the optical disc medium has many defects, it takes a long time to process. In particular, optical heads are heavier than magnetic heads, making it impossible to seek at higher speeds than magnetic disks. Optical disk processing devices also have the disadvantage of not being able to perform high-speed processing because they wait for access from the drive device before processing data. there were.

[Means to solve the problem]

The optical disk processing device of the present invention includes a host interface control device, a data buffer device, an error correction device, a modulation/demodulation device, a drive interface control device, a sector format control device, and a first microprocessor. and add an error correction code,
An optical disk processing device that performs interleaving to arrange data on an optical disk medium and corrects burst errors, which further includes a bus selector device, a semiconductor memory device, and a second microprocessor, and which responds to read instructions from a host system. On the other hand, when the first microprocessor reads data from the optical disk device, the second microprocessor writes the read data to the semiconductor memory, and when the first microprocessor executes the writing operation to the optical disk medium, the second microprocessor writes the read data to the semiconductor memory. The second microprocessor writes the write data to the semiconductor memory, and in response to the next read command from the host system, the first microprocessor reads the data from the optical disk medium, and the second microprocessor reads the data from the optical disk medium. The processor searches for data in the semiconductor memory, and the microprocessor that reads the data faster transfers the data to the host system, making high-speed processing possible.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a diagram showing a block configuration of an optical disc processing apparatus according to an embodiment of the present invention. FIG. 2 is a diagram showing a block configuration of a conventional optical disc processing device.

An embodiment of the present invention will be described with reference to FIG.

First, when compared with the conventional optical disk processing device shown in FIG. 2, the present invention shown in FIG.
Backup 13 has been added.

The control device that connects the host system 1 and the optical disk drive 8 has the following configuration.

Host interface circuit 2. Bus selector circuit 3.
Data buffer circuit 4. Error correction circuit 5, modulation/demodulation circuit 6. The drive interface circuits 7 are connected in series by data signals, and in particular, the path selector circuit 3 is also connected to the semiconductor memory circuit 11 by a data signal line.

On the other hand, the control bus includes the first microprocessor 9, the second microprocessor 12, the sector control circuit 10, which are control circuits, and the host interface circuit 2 to the drive interface circuit 7, which are controlled circuits. Each is connected to blocks connected in series.

However, the semiconductor memory circuit 11 is controlled only by the second microprocessor 12, while the first microprocessor is mainly involved in processing the optical disk.

A write command from the host system 1 is input to the first microprocessor 9 via the host interface control circuit 2. The first microprocessor 9 instructs the optical disk drive device 8 to move the head to the specified address through the drive interface circuit 7.

Next, the first microprocessor 9 selects the V bus of the bus selector circuit-3 to receive the write data.

The write data is sent to the host interface control circuit 2.
Data buffer circuit 4 through bus selector circuit 3
stored in Next, the write data in the data buffer circuit 4 is encoded by the error correction circuit 5, added with an error correction code, and transferred to the modulation/demodulation circuit 6.

A write format is generated by the sector format control circuit 10 and sent to the optical disk drive device 8 via the drive interface circuit 7.

After execution of the write operation, a verify check operation is performed with the data stored in the data buffer circuit 5.

If there is any abnormality during this verify operation, replacement sector processing will be performed.

When a read command is received from the host system, it instructs the optical disk drive device 8 to move the optical head, similar to the write operation. The read data passes through the drive interface circuit 7, the sector format control circuit 10 recognizes the data part and the address (ID) part, and the data is demodulated by the modulation/demodulation circuit 6. A sector format control circuit 10 generates timings such as write and read positions, and a modulation/demodulation circuit 6. It is sent to the error correction circuit 5. The read data is sent to an error correction circuit, the error occurrence position and error pattern are calculated using the error correction code, and if there is an error, a correction operation is performed. In the decoding operation of the error correction circuit 5, defective data is checked in the verify operation after the write operation under stricter conditions than in the read operation. The data after error correction is stored in the -degree data buffer circuit 4. In the read operation, if there is no error in the read data, the read data is transferred to the host system 1 through the bus selector circuit 3 and the host interface control circuit 2. If there is an error in the read data after error correction, the optical head is moved to a replacement sector area, the corresponding sector is searched, and the data of the corresponding sector is transferred to the host system.

If an error or -. is detected in the verify operation after the write operation, a replacement write process is executed to the replacement sector area.

On the other hand, the second microprocessor 12 connects the semiconductor memory 11 to the bus selector circuit 3, and when the first microprocessor 9 executes a write operation, the second microprocessor 12 transfers data to the semiconductor memory 11 in response to the same command. Write. Further, when the first microprocessor executes a read operation, the second microprocessor 12 checks whether the corresponding data exists in the semiconductor memory, and if the corresponding data exists, sends an interrupt to the first microprocessor 9. and transfers the data on the semiconductor memory to the host system on behalf of the first microprocessor 9. In this case, the first microprocessor stops reading from the optical disc medium. If the second microprocessor cannot find the corresponding data on the semiconductor disk, the data read by the first microprocessor passes through the bus selector circuit, and the second microprocessor itself writes the same data onto the semiconductor memory. Record.

With the above operations, the first . The second microprocessor reads and searches for data at the same time, and the microprocessor that finds the relevant data quickly takes priority and transfers the data to the host system, enabling high-speed processing. .

Another method of use is to transfer a large amount of data on the optical disk medium to the semiconductor memory using the - command, and then specify only the second microprocessor and the semiconductor memory to enable high-speed processing.

Furthermore, by providing battery backup for the semiconductor memory, the data in the semiconductor memory can be saved even when the power is turned off, and from the second use, high-speed processing becomes possible with almost no access time to the semiconductor memory.

These processing methods are performed for each micro-processor according to the above configuration.
This can be implemented by setting the firmware of the processor.

〔Effect of the invention〕

As explained above, the present invention connects a semiconductor memory and a second microprocessor to a data bus in an optical disk processing device via a bus selector circuit, and connects a semiconductor memory and a second microprocessor to a data bus in an optical disk processing device. By providing a means of communication in the microprocessor and by allowing the second microprocessor to decode instructions, store data in memory, and initiate data transfer as necessary, frequently used data can be stored without host system intervention. can be stored in the semiconductor memory at all times, and data that has already been handled can be read in the time it takes to access the semiconductor memory. Another method of use is to store data on an optical disk medium in semiconductor memory with a single command from the host system, and by backing this up with a battery, it is possible to supply programs for high-speed system startup and to store data. Can be used for supply. Therefore, it is possible to provide an optical disk processing device that can be used as a memory with a learning function or a system disk for high-speed system start-up.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a block configuration of an optical disc processing apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram showing a block configuration of a conventional optical disc processing apparatus. DESCRIPTION OF SYMBOLS 1... Host system, 2... Host interface control circuit, 3... Bus selector circuit, 4... Data buffer, 5...
...Error correction circuit, 6...Modulation/demodulation circuit, 7...Drive interface control circuit, 8...Optical disc drive device, 9...
...First microprocessor, 10...Sector format control circuit, 11...Semiconductor memory circuit, 12...Second microprocessor, 13... ...Battery backup. Agent Patent Attorney Susumu Uchihara

Claims (3)

[Claims] (1) An optical disk processing device that records and reproduces information on and from a disk-shaped storage medium by optical means, which includes a first microprocessor and a second microprocessor that share a control bus. , the first microprocessor records and reproduces information on the disc-shaped storage medium, and the second microprocessor records and reproduces information on and from a storage means independent of the storage medium. An optical disc processing device characterized by: (2) The optical disk processing apparatus according to claim (1), wherein the storage means is a semiconductor memory. (3) The optical disc processing device according to claim (2), wherein a battery backup is added to the semiconductor memory.