JPS6095763A - Optical disc processor - Google Patents

Abstract

PURPOSE:To improve the system through-put and to protect the data on an optical disc by allowing the titled processor to judge whether or not the next write instruction is executed at the reception of instruction of sector positioning. CONSTITUTION:When an instruction of the write system is transmitted, a microprocessor 34 reads the state of a sector medium corresponding to a designated sector address from a memory 31 to check whether a defective flag is written, noise exists, or data is written or not, and when any defective condition exists, the system enters the abnormal end mode. If all conditions are not set, the microprocessor 34 controls the system that the data is written in a medium as to the sector via an ECC encoder 33 and a parallel serial converting circuit 36. Since the medium is not written dupilicatively, the system through-put is improved and the data on the optical disc is protected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical disk processing apparatus, and more particularly to a data protection system for an optical disk processing apparatus.

Conventional optical disk processing devices check whether a gator has already been written before writing all the data onto the irreversible source disk (/C is used to issue a positioning command to the sector, and after positioning, I had to issue a restraining order.

Therefore, the conventional device has the drawback that it takes time ρ to process the data, resulting in significant performance deterioration.

In particular, in conventional optical disk processing devices, or when data is omitted after being divided into N sectors on one track, after checking the status of each sector,
In addition, the conventional optical disk processing unit had to issue a 4°C instruction to write a command, which caused a performance drop of N times. If the data has been written (or not) and JAL has issued an order to write the data, double writing will occur on top of the data that has already been written onto the optical disk medium. This created a serious problem in terms of data protection.

The purpose of the present invention is to solve the problems of conventional optical disk devices, and to check the status of each sector on a track when receiving a sector positioning command to determine whether or not the next write command can be executed. It is an object of the present invention to provide an optical disk processing device that improves system throughput using an optical disk, protects data on the optical disk, and does not write data to abnormal sectors.

According to the present invention, there is provided a means for detecting a preformatted track address and a sector address on a non-reversible optical disk medium to record and reproduce data, and a means for detecting a preformatted track address and sector address on a non-reversible optical disk medium, and a means for recording and reproducing data, and a flag indicating that a sector recorded on the medium is defective. means for detecting, means for detecting whether a defect exists in the data section of the medium, means for detecting whether data is recorded in the data section of the medium, and storing information of all sectors on the track of the medium. upon receiving a command to search for a target sector from a host device, inspecting the state of a track, storing it in memory, and recording data on a sector of the track; An optical disk processing device is obtained, which is characterized in that it is determined whether data can be recorded on a track.

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

FIG. 1 shows the format of sectors on an optical disk medium processed by the present optical disk processing apparatus. In Figure 1,
On the optical disk medium, there is an ID in which the address of each preformatted sector is written on the optical disk medium.
section 14, and this ID section is a PLO synchronization byte 1.5Y.
An NC byte 21, a track address, and a sector address 3 are written.Furthermore, the optical disk medium has a flag byte section 4 and a data section 15.

In flag byte 4, a signal is written to indicate that the written data is defective. The data section 15 in which data is written on the medium by the optical disk processing device includes a PL.
O synchronization byte 15, 8YNC byte 6 indicating that the following is data, ID byte 7 where the track address and sector address where the data is written are recorded.
, a data byte 8, an error correction code 9, and a byte 10 indicating the end of the data.

As shown in FIG. 2, the optical disk processing apparatus of this embodiment includes means for detecting a preformatted format on an optical disk, recording and reproducing data, and detecting whether the sector recorded on the medium is defective. means for detecting whether or not there is a defect in the data section of the medium; means for detecting whether data □ is recorded in the data section of the medium; and memory means for storing information of all sectors on the track.

When this optical disk processing device records or reproduces data on a medium formatted as shown in FIG. 1, it detects the ID section 14 and uses the track address specified by a command from a host device (not shown).

Compare with the sector address and if they match, data part 1
Data is recorded or reproduced in accordance with the format shown in No. 5, and the data is transferred with the host device.

Furthermore, regarding an embodiment of the present invention (to explain specifically, in this embodiment, read data 104 from the read circuit of the read/write circuit 47 is input to the VFO circuit 42, and the data signal 104 and the clock signal are input to the VFO circuit 42. 105. This data 104 is input to the serial/parallel M 43, and is input as parallel data 104 to the °C take buffer 39.The ID storage buffer 37 contains the track address of the ID section 14,
A sector address is stored, and the microprocessor 34 makes it possible to read the track address and ID data signal of the sector address.

The data buffer 38 stores the parallel data 104 from the data buffer 39, and after inputting the data to the data transfer circuit 35 under the control of the microprocessor 34, the data buffer 38 stores parallel data 104 from the data buffer 39.
2, the data is transferred to the higher-level device. 8YNC
Code detection Oki 1 road 44 is 5YN from lead data 104
After detecting the C code, it operates to convert the data into serial and parallel data.

The counting circuit 45 counts read data pulses, and when noise or data is written to the flip-flop 40 (.
microprocessor 3.
4 to make it readable. Similarly, the defect flag detection circuit 16 can be read by the microprocessor 34.

Note that the memory 31 can be omitted by the microprocessor 34. In the write system from the host device, data is transferred to a data transfer circuit 32, an ECC encoder 33. The data is configured to be written onto the medium through the parallel-to-serial conversion circuit 36, the MFM conversion circuit 41, and the read/write circuit 47. Next, the operation of this embodiment will be explained with reference to the operation flowcharts of FIGS. 3 and 4.

In Figure 3, when a positioning command is now received from the host device, the microprocessor 34 is activated. In other words, when receiving a positioning command, the mode is such that data is always read from the optical disk medium, and the read data is read from the second
It is always input to the serial-to-parallel conversion circuit 43 shown in the figure, and is similarly input to the 5YNC code detection circuit 45. It is also input to the counting circuit 46.

In the counting circuit 45, the number of input data is used as an argument,
If any counting data exists, a message indicating whether noise or data has been written is sent to the flip-flop 40 and set.The microprocessor 34 checks the value of the flip-flop 40 and sets each flag. If so, store it in the memory 31.

Next, as shown in FIG. 4, when a write-related command is sent from the host device, the microprocessor 34 memorizes the state of the housing of the sector corresponding to the sector address specified by the host device. 31, the defective flag is not written, but there is noise (・) or the data has already been written (・). If all conditions are set (if left), the microprocessor 34 transfers the data to that sector using the ECC code shown in FIG.
Encoder 33. Parallel to serial conversion circuit 36. MFM change circuit 41. It controls writing to the medium via the read/write circuit 47.

As mentioned above, make sure that the data is not destroyed by double scratching the actual Fi medium, and that the data is written by issuing a read command before issuing the write command. system throughput)
teeth! Improve yourself.

As described above, the present invention has the effect of improving system throughput, preserving data on an optical disk, and preventing data from being written into abnormal sectors.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a format format on an optical disk according to an embodiment of the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a diagram showing a positioning command reception in this embodiment. FIG. 4 is a diagram showing a flowchart when receiving a stocking command in a non-embodiment. 1...PLO synchronization byte, 2...S
Y N C byte, 3...ID byte, 4...
...Flag byte, 5...PLO synchronization byte, 6...5YNC byte, 7...More byte, 8...Data byte, 9. Old...E
CC, 10...END mark, 11...
・Track address, 12...Sector address, 13...CRC, 14...ID section,
15. Old...Data Department. 31...Memory, 32...Data transfer circuit, 33...BCC encoder, 34. Old.
・Microprocessor - 135...BCC decoder, 36...Parallel-to-serial conversion circuit, 37...
...ID storage buffer, 38°39...Data buffer, 40...7 lip-flop, 41.
...MFM modulation circuit, 42...VFO circuit, 43...Serial-to-parallel conversion circuit, 44...
・5YNC code detection circuit, 45... Counting circuit, 46... Defective flag detection circuit, 47...
...Read/write circuit. 101...Data bus with host device, 102.
...Memory read signal, 103...
Male input data, 104...Reading data,
105...Clock data, 106...
・Count value, 107...Noise signal, 108
...Data written signal, 109...
- Bad sector signal, 110... ID data signal, 111... Memory write signal, 112
...Input into the medium, read signal. Atsushi? Old bow j 'r: ZJ3 z4 diagram

Claims (1)

[Claims] A means for detecting a tonk address and a sector address preformatted on an irreversible optical disk medium and recording and reproducing data; and a means for detecting a flag indicating that a sector recorded on the IX disc is defective. , means for detecting whether a defect exists in the data section of the medium, means for detecting whether a gator is recorded in the data section of the medium,
and a memory means for storing information of all sectors on a track of the medium, and when a command to omit a target sector is received from a host device, the state of the track is inspected, the information is stored in the memory, and the information of the track is An optical disk processing device characterized in that, when receiving a command to record data on a sector, it is determined whether or not data can be recorded on a track.