JPS6363166A - Information recording system - Google Patents

Abstract

PURPOSE:To prevent futile consumption of alternate areas by indicating a message corresponding to the frequency of alternate writing. CONSTITUTION:An optical disk controller 523 includes the number of times of alternate processing occurred during present writing and the cumulative number of times of alternate processing. The frequency of alternate processing is controlled also by a main controller 512. For instance, when the cumulative number of times of alternate processing exceeded 50, the frequency of alternate processing is calculated from the values of the data table on a main storage section 517, and the rate of change of the cumulative number of times of alternate processing and frequency of alternate processing, and every time the number of times or the rate of change exceeds specified numbers, information is given to an operator that acquired defects are occurring frequently on the surface of a recording medium. By such information, the operator urges restoration of the state of the surface and thereby, the futile alternate processing can be prevented.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an information recording system.

[Prior Art] Conventionally, in a recording medium such as a write-once optical disk or an optical card, when alternate writing processing is performed on the sector, defects, scratches on the surface, dust, etc. that occur in the manufacturing process of the recording medium, etc. Therefore, the sector to which replacement writing is to be performed becomes a defective sector, and replacement writing may not be performed normally. In this case, since the defect in the recording medium is local, alternate writing is performed in a physically different sector from the defective sector.

On the other hand, the size of the replacement write area (that is, the number of sectors) is set by adding some margin to the value calculated based on the probability of occurrence of each defect described above.

By the way, with removable recording media such as write-once optical discs, it is difficult to predict the number of defective sectors that will occur due to the adhesion of acquired dust, etc., and the number of defective sectors that will occur due to scratches on the surface. . For this °
Efforts have been made to attach covers to removable recording media, but there are some recording media, such as optical cards, for which it is difficult to attach covers.

When reading data from these recording media, read errors caused by dust or the like can be recovered by wiping the surface of the recording medium. Further, read errors caused by scratches can be recovered by retrying after repairing the surface of the recording medium.

However, for writing, it is necessary to rely on the above-mentioned replacement processing. Therefore, if writing errors occur frequently due to acquired dust, scratches, etc., the replacement area will be used up, and subsequent writing will be impossible. The problem is that it cannot be done.

[Object of the Invention] The present invention has been made by focusing on the above-mentioned problems of the conventional device, and it is possible to prevent the occurrence of frequent write errors due to acquired defects in the recording medium and the needless use up of the spare area. The purpose of this invention is to provide an information recording system that can prevent such problems.

[Embodiment of the Invention] FIG. 1 is a diagram showing a single-sided recording format of an optical disc used in an embodiment of the invention.

Figure t52 is a diagram showing the format of the buffer memory for n sectors in the above embodiment.

There are 25,000 racks on one side with 20 sectors per track, and the sector addresses range from θ to 499,999. Among them, addresses 0 to 999 are the replacement information recording area 114. Addresses 1ooo to 1999 are the replacement area 115. Addresses 2000 (logical address 0) to 401
Address 999 (logical address 11399999) is the information registration area 116. Addresses 402000 to 499999 are the management information area 117.

FIG. 5 is a configuration diagram of the information registration system in the above embodiment.

This embodiment includes a main controller 512, a DMA (direct memory access) controller 513 that controls data transfer within the system, and a DMA (direct memory access) controller 513 that compresses and encodes binary image data using the MMR encoding method, and a data compression/expansion circuit 514 that decodes the image into binary image data; an image storage section 525 that temporarily stores the binary image data and compression-encoded codes; and a serial input/output circuit that controls low-speed serial input/output devices such as keyboards. An output control section 515, a keyboard 516 of the system console, a main storage section 517 of the system, a control section of the system console output and image output CRT, a video output image memory section 518, and a CRT 519 that is a display device. , an image scanner 521 that reads an image with a CCD line sensor and converts it into an electrical signal, a laser printer 522 that outputs the electrical signal as image information on paper, a control unit 520 that controls the image scanner 521 and the laser printer 522, and a compressor. An optical disk device 524 that records encoded image information and management information on an optical disk, a control section 524 of the optical disk device, a data bus 526 for image information, and a main bus 51 of the system.
1.

The main controller 512 is an example of message display control means that displays a message according to the frequency of alternate writing.

FIG. 6 is a diagram showing a part of the data table on the main storage unit 517.

In the above configuration, the optical disk is in the optical disk device 524.
When loaded into the main storage unit 5, part of the management data 120 is stored in the main storage unit 5.
17. The contents of the data table shown in FIG. 6 are also part of the data read at this time. Also,
When a command to take out an optical disk from the optical disk device 524 is input from the keyboard 516, the necessary management information, including the contents of the data table shown in FIG.
17 and is additionally written to the management information area 117 of the optical disc.

Under the control of the DMA controller 513, image data read from the image scanner 521 is transferred to the image storage section 525. The transferred image data is further transferred to the VRAM 518 and displayed on the CRT 519, and at the same time, the image data compressed and encoded by the data compression/expansion circuit 514 is stored again in a part of the image storage section 525.

Here, when an image registration command is input from the keyboard 516, the compressed and encoded image data on the image storage section 525 is additionally written from the beginning of the unused portion 119 on the optical disk. This additional state is indicated by the arrow (→) 121 in Figure 1.
It is shown by . After this additional writing, the data table on the main storage unit 51/7 is updated.

The optical disc controller 523 has a buffer memory for n sectors, and the write data transferred from the image storage unit 525 is stored in the optical disc while being temporarily stored in the buffer memory in units of n sectors. Of course, if the amount of data written at one time is less than n sectors, only the required number of sectors are temporarily stored and recorded on the optical disc.

Furthermore, in the above embodiment, the data temporarily stored in the buffer memory is recorded on the optical disk, and then the recorded data is read and simultaneously verified with the data on the buffer memory, thereby performing a write check after recording. I am doing it.

Next, a case will be described in which data on the buffer memory is additionally written in the position R after the already written data (the position indicated by →121 in FIG. 1).

Data 201 on the buffer memory is appended to position 121 as shown by reference numeral 102, and after the additional writing, a writing check of the appended portion 102 is immediately performed.This check is performed one sector at a time starting from the first sector of the appended portion 102. , is verified with the data on the corresponding buffer memory. As a result of verification, if sector 103 is detected where additional writing was not performed normally, the optical disk controller
5523 L*, data 2 on the corresponding buffer memory
02 at the position after the already written part of the replacement area 115.
Add to i.

After the addition, the data at position 111 is also verified, and when it is confirmed that the data has been added successfully, the information that sector 103 has been replaced with sector 111 is displayed in the replacement information table prepared on the register of the optical disk controller 523. will be newly added. Thereafter, the replacement information on the register, including the added information, is additionally written in the replacement information area 114 of the optical disc.

FIG. 3 is a diagram showing the format of the additionally written replacement information sector 106.

FIG. 3(L) shows the contents of the replacement information sector 104, and the sector 112 at the address 2100 of the safety field 11 is the replacement area 115.
1000 (relative address O) is replaced with sector 108, and FIG.
Address 113 at address 0030003 was replaced with sector 109 at address 1001fiff (relative address 1), but this was not done normally and in the end, sector 11 at address 1002 (relative address 2) was replaced.
It is a figure which shows that it was replaced with 0. FIG. 3C is a diagram in which information indicating that address 103 at address 501180118 has been replaced with sector 111 at address 1003 (relative address 3) is added.

As mentioned above, the replacement information sector increases by at least one sector each time replacement processing for one sector occurs, and the replacement information sector itself is also subject to replacement processing, so writing to the replacement information sector is As a result of the verification, if it is determined that the process has not been performed normally, the replacement process is performed to the next address, which is an unwritten sector.

In other words, the content of the last added replacement information sector becomes the latest replacement information, and this optical disc is transferred to the optical disk device 5.
24, the contents of the replacement information sector are read onto the register of the optical disk controller 523. As a result, the optical disk controller 523
By searching the replacement information on the register, it is confirmed whether the corresponding sector has been replaced in response to a read access from the main controller 512, and if replacement has occurred,
The replaced sector is accessed according to the replacement address in the replacement information.

The replacement in the replacement area 115 and the replacement information area 114 is performed by replacing the primary address as described above, but the replacement can only be performed up to three times in one replacement process, and even three replacements cannot be processed normally. If not, the host computer is notified of this as an error status.

FIG. 4 is a diagram showing replacement processing in the above embodiment.

FIG. 5A is a diagram showing a case where, while the transferred data from the image storage unit 525 is being additionally written to the position 404 on the optical disk, writing cannot be performed normally due to a problem with the optical disk device 524.

In this case, a write error occurs in sector 403 during verification after writing, and its contents are replaced with sector 405 in the replacement area. Then, a write error occurs here as well, and the sectors are replaced with sectors 406 and 407, but all of them are determined to be a write error upon verification. At this time, the main controller 512 is notified of the status of replacement processing error.

In this case, generally, the cause of the defect on the optical disk device 524 side is removed and the optical disk is loaded into the optical disk device again. The replacement information of this optical disk is sector 401.
When the sector pointer 306 indicating the end of the used sector in the spare area in the spare area is read out, a sector search is performed to determine whether the value of the sector pointer 306 indicating the end of the used sector in the spare area is correct. This is determined by the operation of sequentially performing sector-by-sector operations to determine whether the sector is to be written. In sector 401, the sector pointer indicates position 408 (because the replacement of 403→405→406→407 is not communicated as replacement information), and the sector search indicates position 409, causing a contradiction. The optical disk controller 523 replaces the value of the sector pointer loaded into the register with the value obtained by the sector search, and continues the subsequent processing.

FIG. 4(b) shows that the replacement process has occurred, the data replacement to the replacement area has been completed, and new replacement information including that fact is sent.
5 is a diagram illustrating a case where a trouble occurs in the optical disk device 524 when writing to sector 414, and writing from sector 414 onwards results in an error. FIG.

In this case, remove the cause of the defect on the drive side.

When the optical disc is loaded into the optical disc mount M524 again, the replacement information is read. But here, sector 4
16 has failed to write.

Unreadable, in this case sector 41 of the previous generation
5 is targeted for reading, but since this also fails, the contents of sector 410 are eventually loaded onto the register of the optical disk controller 523, and from then on, as shown in FIG. 4(a).
The same processing is performed.

In the above embodiment, the optical disk controller 523 records the number of replacement processes that occurred during the current write in the result data after completing processing for a write command from the main controller 510.

Includes the cumulative number of replacement processes.

The main controller 512 has a cumulative number of replacement processing times of, for example, 50.100.150. ........., the CRT519 will send a message to the operator such as "Please wipe the dirt on the optical disk surface" or "Please repair the scratches on the optical disk surface." to notify you that liberal arts processing is occurring frequently.

Furthermore, the main controller 512 also manages the replacement processing frequency. For example, if the cumulative number of replacement processing is 5
When the value exceeds 0, the replacement processing frequency is calculated from the value of the data table on the main storage unit 517. Here, the replacement processing frequency is expressed as replacement processing frequency = ((total number of sectors in the information registration area) - (total number of sectors in the unused portion of the information registration area))/(cumulative number of replacement processing). The replacement processing frequency is thereafter calculated every time registration is performed, and even if the rate of change exceeds a predetermined value, the above message is displayed on the CRT 519.

As mentioned above, the cumulative number of replacement processing times and the rate of change in replacement processing frequency are obtained, and each time the number of times or rate of change exceeds a predetermined value, the operator is notified of many acquired defects on the surface of the recording medium. I try to let you know what I'm doing. If the operator is aware of this notification, he or she will be prompted to repair the surface condition, and wasteful replacement processing can be prevented.

The predetermined value of the number of times of alternation processing of the above-mentioned repeated planting can be arbitrarily set, and the predetermined value of the rate of change of the alternation processing frequency can also be arbitrarily set.

[Effects of the Invention] According to the present invention, it is possible to prevent the spare area from being used up wastefully when writing errors occur frequently due to acquired defects in the recording medium.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the format of an optical disc in one embodiment of the present invention. FIG. 2 is a diagram showing the format of the buffer memory for n sectors in the above embodiment. FIG. 3 is a diagram showing the format of the replacement information sector in the above embodiment. FIG. 4 is a diagram showing replacement processing in the above embodiment. FIG. 5 is a diagram showing a system configuration diagram in the above embodiment. FIG. 6 is a diagram showing a part of the data table on the main memory in the above embodiment. 512... Main controller, 513... DMA controller, 521... Image scanner, 523... Optical disk control unit, 524... Optical disk device. Patent applicant: Canon Co., Ltd. Agent: Tokoro Yokubo - Figure 3 (a) (b) (C)

Claims (1)

[Scope of Claims] Recording means for alternately writing data in at least one block of a recording medium into physically different blocks; Message display control means for displaying a message according to the frequency of the alternate writing; An information recording system comprising: