JPS61104368A - Optical disc controller - Google Patents

Abstract

PURPOSE:To obtain an optical disc controller where it is sufficient if the capacity of a buffer corresponds to the quantity of data written in one sector, by discriminating whether a sector is good or not when the write to this sector is terminated and writing data in and alternative sector if said sector is bad. CONSTITUTION:In accordance with the indication form a channel device 10, an optical disc controller 20 inputs one-sector components of write data from the channel device 10 to a buffer part 22 and stores it in the part 22. A control part 21 sends this data to an optical disc 30 through a data control part 23 and sends it to a data verifying part 24 also. The verifying part 24 discriminates whether the sector is good or not by comparison of a check code; and if the sector is defective, the data control part 23 writes the address of the defective sector and write data stored in the buffer in an alternative sector and writes a defective sector flag.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc control device, and more particularly to an optical disc control device that detects a bad sector and writes data to an alternative sector.

[Conventional technology]

For optical disk control devices used in the information processing field>
In some cases, a defective sector is determined after data is written to a plurality of sector ICs. Therefore, in order to rewrite the data written to the defective sector into an alternative sector, it is necessary to store the write data in a buffer having a capacity corresponding to at least the above-mentioned plurality of sectors. The capacity of the buffer needs to be large enough to correspond to the amount of data to be written to the maximum buffer.

[Problem that the invention seeks to solve]

The problem to be solved by the present invention is that in order to rewrite the data written in a bad sector to an alternative sector, a large buffer of 1 tora or 2000 yen is required. When the write is completed, it is determined whether the sector is good or not, and if the sector is bad, the data is written to a replacement sector immediately.The buffer capacity should be large enough to correspond to the amount of data written to one sector. An object of the present invention is to provide an optical disc control device.

[Means for solving problems]

The optical disc control device of the present invention can be applied to one sector of an optical disc device! a buffer section that has a capacity corresponding to the amount of data that can be written and that inputs and stores write data from the channel device to the optical disk device; and a buffer section that inputs the write data or 3 output data from the optical disk device and detects errors. a data verification section that inputs the write data from the buffer section and sends it to the optical disc device and the data verification section, or inputs the read data from the optical disc device and sends it to the data verification section. a control unit, when writing and reading of the write data to one sector of the optical disc device is completed and the data verification unit detects an error in the data read from the sector, determining the sector as a bad sector; The sector address of the bad sector and the write data stored in the buffer section are written to an alternative sector provided in a specific part of the groove to which the bad sector belongs, and a bad sector flag is set in the bad sector. To! and means for inserting.

〔Example〕

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

FIG. 1 shows a track former on an optical disk of an optical disk device, and shows a formatter for one track and one sector within the track former.

For one tiger, H+ corresponds to the number of users using the sector.
1 sector 0, 1.2. There is a primary sector consisting of n, and an alternative sector consisting of two sectors n+1 and n+2, which are substituted when a defective sector is found among sectors O to n. 1, within each sector. is gap 10
It has three blocks partitioned by 01, 1004, and 1006, and the first block has a sector address part 1002 in which a sector address is written, and a check, code part 1 in which a check code t and tt are written for the sector address.
IDi! consisting of 003! 15IOIO. The second professional, Ri, is the third professional, Ri, data department 10.
A bad sector flag unit 1005 writes a bad sector flag indicating that the sector is defective when data is not correctly written to the sector. The third block is the bad sector address l'1s1007! :, a user data section 1008 in which user data is written, and a check in which a check code for the defective sector address section 1007 and user data section 1008 is written.

This is a data section 1011 consisting of a code section 1009 and a code section 1009.

FIG. 2 shows a configuration diagram of an embodiment of the present invention.

The channel device 10 is F-connected to a connection 101 to a buffer section 22 which is a component of an optical disk control device 20 . The optical disk control device 20 includes a microprogrammed control unit 21, a data control unit 23 that controls the flow of data, a data verification unit (hereinafter referred to as an ECC unit) 24 that generates and checks codes for checking and checking, and a buffer. It is composed of a section 22. The data control section 23 is connected to the F optical disc device 30 through the connection 107.

Figure 3 shows sector 1 belonging to the primary sector and sector 80 belonging to the alternative sector of the number shown in Figure 1.
It represents a friend. 1001 to 1009 indicate the same contents as in FIG. 1, and 3001 to 3009 relate to sector 80, and indicate contents corresponding to the same last digit of the numbers 1001 to 1009. Note that in FIGS. 1 and 3, it is assumed that the ID sections 1010 and 3010 have been correctly written on the optical disc in advance.

Next, the operation in this embodiment will be explained.

First, upon receiving a write instruction with sector 1 as the starting sector from the channel device ff1tlo, the optical disc control unit R2
0 inputs one sector worth of write data from the channel device 10 to the connection 101 and stores it in the buffer unit 22. The control unit 21 performs all positioning in the ID field 1010 of sector 1 of the optical disc shown in FIG. The sector address of sector 1 is set in the free data control section 23 via the connection 103. At the same time, the control unit 21 transfers the write data for sectors F and l to the connections 102 and 103 from the buffer unit 22 to the data control unit 23 via the connection 104t-, and further transfers this write data to the connection 10.
7t'' to the optical disk device 30.The written data is sent to the optical disk device 30 as well as to the ECC unit 24, and a check code is generated to check whether the written data was correctly recorded in the optical disk device 30. In order to check whether the
This code checker sends a code to the 47ECC unit 24 via connection 106 and performs a code check and write check on the bad sector address and user data in the data section 1011 of sector 1 that has been read. is generated and compared with the read check code.

When this operation is completed, the ECC section 24 notifies the F control section 21 of the check result through the connection 105. The control unit 21 judges this result, and if it is good, it means that the writing of the sector 1 has been completed, and the process proceeds to the same process for the sector 2.

If the determination by the control unit 21 is negative, the above-mentioned positioning is performed in the sector 80 in order to write the first write data in the sector 80, which is the 1st alternative sector, and when the positioning is completed, the control unit 21 sets the sector address indicating the sector 1. connection 10
3 sets the data control unit 23VrP and sends an instruction to send the write data stored in the buffer 77 section 22 to the connections 102 and 103 when writing to sector 1. The data is given to the data control unit 23. The control unit 21 also determines the check result in the ECC unit 24 based on the read data from the optical disk device 30 when writing to the data section 3011 is completed in the same way as writing to the sector 1 for the sector 80 serving as an alternative sector. If it is determined to be good, it will be repositioned to the bad sector l,
After writing to the defective sector flag section 1005 - Vt - is completed, the data section 1011t of sector 1 is skipped, and the process shifts to the write operation for sector 2 . Note that after writing to the previous sector 80, if this sector is also determined to be defective, the same process is performed using sector n+21ft:.

The above write processing is performed for the number of sectors specified by the channel device 10.

The operation when reading the data written on the optical disk exemplified above will be described next.

First, the control unit 21 causes the optical disc device 30 to read out the ID section 101 (l) of sector 1 and read out the sector address section 100.
The sector address of No. 2 is compared with the address specified by the channel device 10, and if they match, it is confirmed that the F positioning is completed, and then the bad sector flag section 1005t
- If the bad sector flag section 1005 indicates that sector 1 is defective, it is repositioned to sector 80 in the same way as the positioning for sector 1, and the bad sector flag of the defective sector flag section 3005 is read, and this indicates that the bad sector flag of sector 80 is good. If so, compare the sector address field 1002 of sector 1, which was previously found to be defective, with the defective sector address section 3007 of the data section 3011, find a match, and compare the defective sector address of the data section 3011 with the user data. and read the check code, ECC
3011, generates a check code for the bad sector address and user data, compares it with the read check code, obtains the result, performs error correction, and sends only the user data in the data section 3011 to the channel device. 10, and the process moves on to the next sector 2 and subsequent sectors.

〔Effect of the invention〕

If the present invention is implemented as described above, it becomes possible to automatically write a replacement sector to a defective sector using a buffer unit having a storage capacity of one sector.

[Brief explanation of drawings]

1 and 3 are explanatory diagrams of a known track format of an optical disc device, and FIG. 2 is a block diagram showing an embodiment of the present invention. 20... Optical disc control device, 21...
・Control unit, 22...Buffer unit, 23...
・Data control unit, 24...Data verification unit, 10
02.3002...Sector address section, 10
05,3005...Bad sector flag section. 10ρ5...Defect upper 7y flag 4y Kaya 2WJ

Claims (1)

[Scope of Claims] A buffer section having a capacity corresponding to the amount of data that can be written in one sector of an optical disk device, and inputting and storing write data from a channel device to the optical disk device; and the write data or the optical disk. a data verification section that inputs read data from the device and performs error detection; and a data verification section that inputs the write data from the buffer section and sends it to the optical disk device and the data verification section, or inputs the read data from the optical disk device. a data control unit that inputs the data and sends it to the data verification unit; writing and reading of the write data to one sector of the optical disk device is completed, and the data verification unit detects an error in the data read from the sector; When the sector is determined to be a bad sector, the sector address of the bad sector and the write data stored in the buffer section are written to an alternative sector provided in a specific part of the track to which the bad sector belongs. , means for writing a bad sector flag into the bad sector.