JPH01201858A - Optical disk control method - Google Patents

Abstract

PURPOSE:To diagnose a readout data processing system circuit by reading test data for readout only at a specific position on a medium by an optical disk controller independently of a host device when the medium is loaded and a readable/writable state is set. CONSTITUTION:When an optical disk medium is loaded on a drive 31 and the readable/writable state is set, a controller 30 closes a gate 40, and blocks the transfer of the content of a buffer 33 to the host device. Next, by moving an optical head and reading out recorded test areas on 16 tracks at the innermost periphery of the medium, the diagnosis of the readout data processing system circuit in an optical disk device extending from the drive 31 to the controller 30 is performed. Thereafter, a fact that the readable/writable state of the medium is set is reported to the host device, and the buffer 33 is cleared, and the gate 40 is opened, then, preparation for an instruction from the host device is completed. Therefore, it is possible to eliminate a specific circuit to diagnose the optical disk controller or driving device.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of controlling an optical disc device.

[Conventional technology]

Conventionally, in order for a device used for this type of optical disk control (hereinafter referred to as an optical disk control device or controller) to diagnose the read data processing system circuit section of the controller itself or an optical disk drive device (hereinafter referred to as a drive), 1 is required. A selector was provided in the middle of the original read data path, and the configuration was such that the microgross sensor in the controller could input diagnostic data to the read data processing circuit.

FIG. 6 shows a conventional controller 10 and drive 11.
This is an example of diagnosis number 9 in . In response to commands from the microcomputer (MPU) 4=e in the controller IO, the data read out by the optical disk head of the drive 11 is processed using a phase-locked loop circuit (PLL).
) 19, a data discrimination clock a is obtained, and using this data discrimination clock a, data is framed by the code detector 18 and demodulated by the demodulator 17. It is converted into serial to parallel and input to the first input of the selector 21 of the controller IO. On the other hand, the other input of the selector 21 receives test data from the MPU 12 via the diagnostic register 20. The output of the selector 21 is subjected to error correction/checking in an error correction code circuit (ECC circuit) 15.

After a CRC check is performed by a cyclic redundancy code circuit (CRC circuit) 14, the data is stored in a buffer 13 for transfer to a host device.

In the above configuration, the MPU 1 of the controller 10
By switching the input of the selector 21 to the diagnostic register 20 side, 2 can give pseudo read data for diagnosis to the FCC circuit 15 through the 9 diagnostic register 20, and the data that has entered the buffer 13 through the CRC circuit 14t. By taking out and checking p, F
The CC circuit 15, CRC circuit 14, and buffer 13 can be tested.

The above-mentioned diagnosis is performed when the power is turned on to the controller 10, when a diagnosis execution command is given from a higher-level device, or when the controller determines that it is necessary and failure even during read processing. The results are stored in the controller as logging or reported to a higher-level device if necessary.

Here, an example of the format of an optical disc medium is shown.

FIG. 4 is an example of a selector format.

After the 45-byte identification code section (ID section) 101, there is a 659-byte data section 102 with a 12-byte gap Gl in between, and the I of the next sector.
There is a gap G2 of 14 bytes between it and the D section 103.

FIG. 5 shows the detailed format of the data section 102. Referring to Figures 4 and 5 below, P consisting of 12 bytes
The LL/VFO pull-in code (PLO) 104 is used to cause the PLL circuit 19 of the optical disk device to pull in the VFO, and the following 4-byte data position synchronization code (5YNC) 105 is used to read the following data (
DATA ) 106 start position. The 524-byte DATA 106 is an area for recording data given from the needle, and the 4-byte CRC:I-1' obtained by calculating the DATA 106 is recorded in the CRC 107. DATA 106 and CRC107 total 528
The bytes are treated as a matrix of 22 columns x 24 rows.
A 1-byte data position resynchronization code (RECYNC) l08 is inserted for resynchronizing data positions when a 7-raming shift occurs in units of 22 bytes in the column direction. Next to DATA 102 and CRC 107, ECC code 109 consisting of 88 bytes in total for 22 columns of 4-byte FCC code calculated on a row-by-row basis is recorded with 1-byte RECYNC 108 inserted in each 22-byte column direction. Ru. RECYNC108 has a total of 27 bytes.

In the optical disk device, data is written into and read from the data portion in accordance with the format specifications shown in FIGS. 4 and 5.

[Problem that the invention seeks to solve]

In the above-mentioned conventional optical disk control device used for optical disk control, in order to diagnose the read data processing circuit section, 1) a circuit that is unnecessary for the original read data processing is added, and 2. the entire circuit becomes large and expensive. There were drawbacks. Another drawback is that the microprocessor must also be fast in order to provide pseudo data at a speed equivalent to that of the original read data processing.

Furthermore, in order to diagnose the circuit section and PLL section around the optical disk head of the drive using pseudo signals, there is a drawback that the number of circuits for diagnosis increases more than the above.

[Means for Solving the Problems] The optical disc control method of the present invention temporarily suspends reporting to the host device when an optical disc medium is installed in the drive and becomes readable/writable, and controls the drive and drive. By moving the optical head to a predetermined position that is not concerned with the host device and reading data recorded in advance in a formant different from the drive's predetermined specifications, the circuit of the read data processing system between the drive and the controller can be changed. The system performs a diagnosis, and then reports to the host device that it is possible to read and write to the optical disk medium.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an example of a read data processing system of an optical disk controller (controller) for carrying out the method of the present invention, including a read section of an optical disk drive. Components that are the same as those shown in FIG.
The data discrimination clock a is generated by the data discrimination clock a, and the data is subjected to 7-raming by the code detector 38 and demodulated by the demodulator 37 using the data discrimination clock a. This demodulated data is serial-parallel converted by the S/P circuit 36, inputted to the ECC circuit 35 of the controller 30, and after an error correction V check, a CRC check is performed by the CRC circuit 34, and then stored in the notation buffer 13. . The MPU 32 transfers the contents of the buffer 33 to the higher-level device by either outputting the contents of the buffer 33 by itself or by opening the key (key)=10 as necessary.

FIG. 2 is a logical configuration diagram of an optical disk medium used in an embodiment of the present invention.

The area between the innermost and outermost punto zones 42 on the optical disc medium 41 is divided into a recordable area 43 and a recorded test area 44 .

Of these, only 10 copies indicating sector positions are recorded in each sector of the recordable area 43.

The data section following the ID section is provided for recording unrecorded data given by the user to the optical disc device. Further, an ID section is recorded in each sector of the recorded test area 44, and test data is also recorded in the data section.

The recordable area 43 is a so-called user area that can be accessed by the host device via the controller 30, but the recorded test area 44 can only be accessed by the controller 30 and the tribe 31, which are not concerned with the host device. This is an area where

Figure 3 is a detailed configuration diagram of the recorded test area 44. The recorded test area 44 has a total of 16 tracks, and the same information is recorded in the data section of each sector on the same track, and the content recorded in DATA is sent to the MPU 32 in the controller 30. This has been announced in advance. Each track in the recorded test area 44 is
In order to diagnose the read data processing system of the controller 30 and drive 31, the following procedure is performed.

The standard data trunk TRn is recorded in a specification format according to FIG. 4, and is used when testing the basic functions of the entire read processing section of the optical disk device.

PLO 11) In rack TRp 11, the first byte of PLO 104 is missing, leaving 11 bytes, and the gap G1 is longer by 1.byte. PLOJ,
In rack TRI) 10, the first two bytes of PLO 104 are missing, leaving 11 bytes, and the gap fG is longer by those two bytes. Similarly, PLO9) rack TRp9 to PLO4) rack TRp4 is deleted, and in PLO4) rack TRp4, the first 8 bytes of PLO104 are missing, resulting in 4 bytes, and Gano fGl is longer by that 8 bytes.

The formants after 5YNC105 are as specified. Then, use the optical disk device to load p PLO11) Rack T
By sequentially reading racks RP11 to PLO4) and TRp4, the VFO pull-in characteristic of the PLL circuit section in the read processing section can be tested.

5YNC) Rough riTReync ”T: is 5YNC
The 4-byte code of 105 is recorded as a code different from the specifications.

By reading this track, it is possible to test the operation of the read processing unit when the p5YNC code cannot be detected.

RESYNC) In the rack TRrecy, the code is recorded in some bytes of the RESYNC108, which has a total of 27 bytes, and differs from the specifications. By reading this track, we test the operation of the read processing unit when the RESYNC code cannot be detected. can do.

CRC) In the rack TRc, a code different from the 4-byte CRC code obtained by calculating DATA 106 is recorded in CRC 107, and the CRC error detection function can be tested by reading this track. can.

1 symbol error track TRl5. 2 symbol error track TR2S, single burst track TR5b
, the double burst track TRdb is a track for testing the ECC correction function. DATA 106 and
CRC107, DATA 106 and CRC107
2 is composed of ECC109 obtained by calculating
For a matrix of 2 columns x 28 rows, the 1-symbol error track TRl sc' records any 1-byte data per row forcibly as another value, and the 2-symbol error track TR2g records the data per row per row. Any 2 bytes of data are forcibly recorded as other values.

In the single burst track TR5b, all the data in any one column is forcibly recorded to another value, and in the double burst track Tl (db, all the data in any two columns are forcibly recorded to other values. By reading these tracks, each one symbol error is corrected,
2 Symbol Error fT Correct e ECC correction functions such as single/mast error correction and double burst error correction can be tested.

The optical disc medium is installed in the drive 31.

When the reading becomes possible (ready), the controller 30 closes the gate 40 to prevent the contents of the buffer 33 from being transferred to the host device, and then moves the optical head to the recorded test area 44 with respect to the drive 31. instruct them to do so.

After that, read processing is performed on the 4Q16 tracks of TRn (diagnosis of the read data processing system circuit of the optical disk device from the drive 31 to the controller 30 is performed).

After that, the optical disk medium is loaded into the host device, and
After reporting that read/write is possible and clearing the buffer 33, the controller 40 is opened and prepared for instructions given from the primary device.

〔Effect of the invention〕

As explained above, the present invention enables the optical disk control device to specify information on the optical disk medium that cannot be accessed from the host device, without depending on a command from the host device, when the optical disk medium is loaded and becomes readable or unreadable. By reading the read-only test data located at the location, there is an effect that the circuit of the read data processing system can be diagnosed without adding a special circuit for diagnosis to the optical disk control device or the optical disk drive device.

In addition, by using the above function, when a normal read command is given from the host device and an error is detected in the data during reading, the optical disk control device (controller) can read the above test data at its own discretion. Reading also has the effect that it can be used to determine whether the cause of the error is the user data recorded on the medium or the circuitry of the read data processing system.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an optical disc control device used for controlling the optical disc of the present invention, Fig. 2 is a block diagram of an optical disc medium used in the present invention, and Fig. 3 is a block diagram of the recorded test area shown in Fig. 2. , Figure 4 is a sector format diagram of the optical disc medium used in the optical invention, Figure 5 is a detailed configuration diagram of the data section of Figure 4, and Figure 6 is the configuration of a conventional optical disc control device. It is a block diagram. Explanation of symbols: 30 is a controller (optical disc control device), 31 is a drive (optical disc drive device), 32 is M
PU (microcomputer). 33 is a buffer, 34 is a CRC circuit (cyclic redundancy code circuit), 35 is an ECC circuit (error correction code circuit), 36 is an S/P circuit (series/parallel circuit), 37 is a demodulator, and 38 is a code detector. 1.39d PLL circuit (phase lock loop circuit). 40 is a goo), 41 is an optical disk medium, 42 is a dead zone, 43 is a recordable area, 44 is a recorded test area,
101 is an ID section (identification code section). 102 is a data section, 103 is an identification code section, and 104 is a P
LO (PLL/VFO retraction coat part), 105 is 5
YNC (data position synchronization code), 106 is 1) ATA
(data code), 107 is CRC (cyclic redundancy code)
, 108 is RECYNC (data position resynchronization code: y)
. 109hEcc (error collection code) is displayed. Figure 2 Figure 3 Figure 5 Dan

Claims (1)

[Claims] 1. An optical disk medium is installed in the optical disk drive,
When the optical disk becomes ready for reading and writing, it temporarily suspends reporting to the higher-level device, moves the optical head of the optical disk drive device to a predetermined position that is not concerned with the higher-level device, and reads the optical disk that has been recorded in advance there. By reading data in a format different from the predetermined specifications of the drive device, the circuit of the read data processing system between the optical disk drive device and the optical disk control device is diagnosed, and then a report indicating that reading and writing to the optical disk medium is possible is sent to the upper level. An optical disc control method characterized in that: