JPS5928245A - Optical disk processor - Google Patents

Abstract

PURPOSE:To perform the processing of a substitute track without using a software/upper device, by shifting automatically a substitute sector having an overflow within the same track in write and read modes to a substitute track. CONSTITUTION:When detecting a defective sector, a processor searches an address of a substitute sector and detects the address at an ID detecting part 10. A control part 7 checks whether all substitute sectors are written or not and then writes a track shift flag to the defective sector if all substitutes are written. Then the part 7 shifts a head to a prescribed substitute, detects the address of the substitute track at the part 10 to confirm a writable sector, and produces a substitute track sector correspondence table to write the track address, sector address and write data. In a read mode the part 7 reads out the substitute track sector correspondence table by a track shift flag 16 detected by a defective flag detecting part 11. Then the part 7 shifts the head to a substitute track and searches a sector address to obtain the read data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical disk processing device, and in particular to a digital disk processing device.
An alternative for recording and reproducing data.

The present invention relates to a source disk processing device that performs processing.

Conventional digital data magnetic recording and reproducing disk devices perform alternative track processing for defective sectors that cannot be written or read due to media defects, etc.
Alternative to software.

A table for allocation was set up, and if a bad sector was found, the software would allocate an alternative track. However, the optical disk processing device sends out the target address on the optical disk medium, and when it approaches the target address, the current controller issues a request to send the ID on the above address. When this processing device reads the ID on the track, it calculates whether the previously sent address matches the current address, and if they match, it reports the completion of positioning to the host device.

For this reason, this optical disk processing device takes a considerable amount of time compared to a method that uses servo surfaces for positioning, and also has the disadvantage that the system's sloop and speed drop significantly when alternative track processing is performed through the intervention of all software. It had

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical disk processing apparatus which eliminates the drawbacks of the conventional apparatus and completely reduces time loss in the process of allocating an alternative track for a bad sector and in the process of reading an alternative track during reading.

According to the present invention, an optical disk processing device for controlling a disk device for recording and reproducing digital data includes a data transfer section for transferring all read/write data, and a write buffer for storing write data. , an ID generating part that generates all track addresses and sector addresses, a bad flag generating part that generates all bad sector flags and track movement flags, a read buffer that contains read data, and a read buffer that selects all data from it. track selector and read data.
An ID detection section that detects all addresses and sector addresses, a bad flag detection section that detects bad sector flags or track movement flags, a read/write section that reads or writes data, and an ID detection section that detects all addresses and sector addresses. and a microprogram control unit 7 configured to perform processing on an alternative track, which controls the movement to the alternative track when an alternative sector within the same track on the disk overflows. A processing device is obtained.

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

FIG. 1 shows an optical disk processing apparatus according to an embodiment of the present invention. In FIG. 1, this embodiment is an optical disk processing device for controlling a disk device that records and reproduces all digital data, and includes a data transfer unit 2 connected to a host device 1 and configured to transfer all read/write data; Raidopa, Fa 3 for storing write data, and ID generating section 8 for generating track addresses and sector addresses.
, a defective flag generator 9 that generates all defective sector flags and track movement flags, a read buffer 12 that stores read data, a selector 4 that selects data from them, and a track address from the starting data. ID detection capital that detects all sectors and addresses
, a defective flag detection section 11 for detecting all defective sector flags or track movement flags, a read/write section 5 for reading or writing data, and a microprogram control section 7 for processing alternative tracks. a disc 6 containing and having predetermined alternative tracks;
When an alternative sector within the same track overflows,
This allows the player to automatically move to an alternative track.

FIG. 2 shows a track format of a disk medium used in an embodiment of the present invention. In Fig. 2, the tiger and rim are the original sectors #1 to #M and the alternative sector #M+1.
~N, and this track is rlj-! l-1)
With rack, track n is defined as an alternative. These tigers.

The format of the sector that achieves this is shown in Figure 3, in which ID synchronization data 13 and track address 1
4, ID capital including sector address 15 and defective 7 lag 16, data synchronization data 17, track address 18, sector address 19, fixed length data 2
0 and a data section including an error correction code 21, and the IDfJO defect flag 19 is written in advance, and the defect flag and data section are written by a write operation described later. ing.

Referring to FIGS. 1 and 4, alternative processing at the time of writing in an embodiment of the present invention will be described.
Once the processing device detects a bad sector, it then proceeds to step 22.
The address of the alternative sector is searched for, and the ID detection unit 10 detects the address. In step 23, the control unit 7 checks whether the address matches the output address of the ID detection unit 10, and if the addresses match, it is checked in step 24 whether all alternative sectors have been written. If the write has been completed, the control section 7 activates the defective flag generating section 9 and writes a track movement flag into the defective sector through the selector 4 and the read/write section 5 in step 25. Next, the control unit 7 performs step 26.
The head (not shown) is moved to a predetermined alternative track in step 27, and the address of the alternative track is detected by the ID detection unit 10 in step 27. If the address matches the address, writing is performed in steps 29 and 30. Check all possible sectors. If the control unit 7 is writable, it creates a complete alternative track/sector/correspondence table in step 31, then activates the ID generation unit 8, and generates all the track addresses and sector addresses of the defective sector in step 32. data section, address 18 and sector
Write to address 19. Next, write buffer 3
The data is passed through the selector 4 and the read/write unit 5, and is then fixed length data 20 and error correction code 2.
Written to 1. In this way, the alternative track processing at the time of writing is completed.

Next, the alternative track processing at the time of reading in one embodiment of the present invention will be explained with reference to FIGS. 1 and 5. In step 33, the control section 7
The tiger detected by 1 is detected by the movement flag 16.
In step 34, the alternative track/sector correspondence table 'Jk is taken out. In step 35, the head (not shown) is moved to all alternative tracks. In step 36, all alternative track addresses obtained by the ID detection section 10 are searched. Bell. If the alternative tiger and quad addresses match, the control unit searches all sector addresses in step 37, and in step 38, searches for the ID
After confirming that it matches the sector address output from the detection section 10, the read data from the read buffer 12 is transferred to the host device 1 through the data transfer section 2 in step 39.

In this way, in this embodiment, when an alternative sector within the same track overflows during writing or reading, the control is performed so that the movement is automatically moved to the alternative track, without using any software or host device for processing the alternative track. It is something that is done on a regular basis.

As described above, the present invention has the advantage that processing of alternative tracks can be automatically performed without using software/host equipment, and time loss of software/host equipment can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a basic program in an embodiment of the present invention, FIG. 2 is a diagram showing an example of a 7-track disk medium used in an embodiment of the present invention, and FIG. , FIG. 4 and FIG. 5 are diagrams showing processing flowcharts in an embodiment of the present invention. 1... Upper device, 2... Data transfer section, 3... Write buffer, 4... Selector, 5... Read/write Section, 6.・・・・・・
... Disk, 7 ... Micro program control section, 8 ... ID generation section, 9 ... Defective flag generation section, 10 ... ID detection capital , 11...
...Failure flag detection unit, 12...Read buffer, 13...ID synchronization data, 14...
...Track address 9-address, 15...Sector address, 16...
River/defective flag, 17...Data for data synchronization, 18...Track address, 19...
... Sector address, 20 ... Fixed length data, 21 ... Error correction code. And winter a Lulu is finished 2-

Claims (1)

[Claims] An optical disk processing device for controlling a disk device that records and reproduces digital data includes a data transfer unit that transfers all read/write data, a write buffer that stores write data, a track address,
ID that generates data for writing sector address
A defective flag generating section that generates a defective sector flag and a track movement flag, and an ID that detects a track address and a sector address from read data.
a detection section, a bad flag detection section that detects a bad sector flag and a track movement flag, a read buffer that stores read data, a selector that selects data to be written, and 1. An optical disk processing device comprising: a microprogram control unit configured to perform processing on an alternative track.