JP2002170342A - Method for recording write-once type optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To additionally record on an optical disk later even when a record error occurs again during record error processing. SOLUTION: When the error occurs during recording is made on the optical disk, whether or not >=300 blocks being the minimum length of one track are recorded by the time when the error occurs is decided (step S3), and when >=300 blocks are not recorded, dummy data are successively recorded until >=300 blocks are recorded (step S4 to step S6). When an error occurs again while the dummy data are recorded (Yes in step S5), whether or not the number of record blocks so far surpasses the reference number of blocks (150 blocks) is decided (step S7), and the dummy data are successively recorded until >=150 blocks are recorded (step S8 and step S3 to step S6) when it is decided that the number of record blocks surpasses the reference number of blocks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup which sequentially accumulates recording data transferred from a host computer in a buffer memory, and sequentially reads out the accumulated recording data, via an optical pickup which follows at a constant speed. Track-at-once (Track)
At-Once) write-once optical disc.

[0002]

2. Description of the Related Art When data is recorded on a write-once optical disc, data to be recorded is generally transferred from a host computer to a recording apparatus via a bus-type high-speed interface. The recording data is temporarily stored in a buffer memory in the recording device and then read out sequentially, and is sequentially written to an optical disk by an optical pickup, for example, by a track-at-once method. The track-at-once method is a method in which recording data is recorded on a track formed on an optical disk at once.

When a recording error occurs due to a scratch or an attached dust on an optical disk while data is being recorded by such a track-at-once method, information recorded on the PMA and information recorded on an actual track are recorded. Since the data content does not match, a media error,
That is, there is a problem that the optical disk itself becomes unusable.

Therefore, an information recording / reproducing apparatus which solves such a problem has been proposed (for example, Japanese Patent Laid-Open No. 10-1).
43980). This information recording / reproducing apparatus stores an error address at the time of stopping data recording when a servo error such as an off-track or the like occurs during recording on an optical disc, and starts recording from the vicinity of the stored error address. Predetermined dummy data is recorded in the remaining portion of the area allocated as a track. Specifically, FIG. 5 of the publication discloses a detailed flowchart.

That is, according to this information recording / reproducing apparatus, when an error occurs during recording, dummy data is recorded up to 300 blocks, which is the minimum length of one track, and
The error information is set in the MA and the processing is terminated.

[0006]

By the way, errors caused by scratches on the surface of the optical disk or attached dust are as follows.
It is not sporadic and likely to occur repeatedly. That is, there is a high possibility that an error occurs during the recording, and the error occurs again during the additional recording process of recording the dummy data at that time.

However, in the above-described conventional information recording / reproducing apparatus, when an error occurs during such a process of adding dummy data, the error processing is simply performed and the process is terminated (see FIG. 5). In step S27), no consideration is given to such an error during the additional recording process. In other words, there is a problem that it is not possible to cope with an error that occurs during the dummy data appending process.

If an error occurs during the additional writing process, it is assumed that the same additional writing process is repeated from the beginning at that time. For example, if the error is repeated 10 times thereafter, the dummy data additional writing process is performed. As a result, 10 tracks are used, which causes a problem that the number of usable tracks is greatly reduced. Further, for example, if an error occurs at the time when the additional recording process has been performed for 100 blocks, the additional 200 blocks are directly subjected to the additional recording process, the recording for one track is completed, and then the additional recording process for one track (300 blocks) is performed again. Therefore, there is a problem that blocks that can be originally used are used in the additional recording process, and the data recordable area is reduced accordingly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has as its object to reduce the number of tracks for error processing even when an error occurs during error processing (during the additional writing processing in the prior art). It is an object of the present invention to provide a write-once optical disc recording method capable of performing an error process so that the optical disc can be additionally recorded without increasing the number of blocks and reducing the number of usable blocks more than necessary.

[0010]

In order to solve the above-mentioned problems, a recording method for a write-once optical disc according to the present invention comprises: sequentially storing recording data transferred from a host computer in a buffer memory; Is a track-at-once write-once optical disc recording method for sequentially recording data on an optical disc via an optical pickup that follows at a constant speed while sequentially reading out the data. A first procedure for determining whether or not the track is a reserved track, and a second procedure for determining whether or not 300 or more blocks, which is the minimum length of one track, is recorded before an error occurs if the track is not a reserved track. Step 2 and 300
If no data has been recorded for more than 300 blocks, a third procedure is to continuously record the dummy data until the data reaches 300 blocks or more. If an error occurs again during the recording of the dummy data, the number of recorded blocks until then But,
A fourth procedure for determining whether or not the reference block number is obtained by subtracting 150 trackable blocks from the 300 blocks, and until the fourth procedure determines that the recording block number has exceeded the reference block number. A fifth procedure for repeating the third procedure, and when it is determined by the fourth procedure that the number of recording blocks has exceeded the reference block number by repeating the fifth procedure, the fifth block And a seventh procedure for repeating the sixth procedure when an error occurs again during the recording of the dummy data until the number of blocks reaches 150 or more. When it is determined that 300 or more blocks have been recorded in the second procedure, or when 300 blocks have been recorded in the third procedure. When recording the dummy data until more than rock, or in the sixth step 15
When dummy data is recorded until the number of blocks reaches 0 or more, an eighth procedure for recording a link block lastly is provided.

According to the present invention having such features,
When an error occurs during recording on the optical disc, 300
Dummy data is continuously recorded until a block is reached, and finally a link block (runout 1 block, runout 2 block, link block) is recorded. At this time, if an error occurs again during the recording of the dummy data, the number of recording blocks up to that point is the reference block number (150 blocks in this case) obtained by subtracting 150 trackable blocks from 300 blocks. It is determined whether or not the number has exceeded the limit, and the recording of the dummy data is continued as it is until it is determined that the number of recording blocks exceeds the reference block number (150 blocks). If it is determined that the number of recording blocks has exceeded the reference number of blocks (150 blocks), the dummy data is continuously recorded from that point onward until the number of trackable blocks becomes 150 or more. If an error occurs again at this point, dummy data is continuously recorded again until 150 blocks or more from that point. As a result of repeating such processing, if the dummy data is recorded until the number of blocks on the track becomes 300 or more, or if the dummy data is recorded until the track becomes 150 or more blocks that can be tracked, the link is finally set. Record the block for use.

That is, when an error occurs during recording on the optical disk and the error occurs again during the error processing, the error processing is continuously executed again from there. The number of blocks for recording dummy data is changed from the first 300 blocks to 150 blocks that can be tracked, and then executed. Then, when the dummy data of 150 blocks or more is recorded,
Finally, a link block is recorded.

[0013] That is, although the recorded data itself can be correctly read only halfway, it is recorded as a track in the same form as a normal track recorded up to a link block. When additional recording is performed, this new track can be recorded following the track on which the dummy data is recorded.
Further, in the present invention, even if an error occurs again during the error processing, the dummy data is continuously recorded, and the link block is finally recorded. Therefore, the number of blocks for recording the dummy data is more than 300 blocks. In some cases, only one track is required for error processing. That is, since only one track is required for error processing, the data recording track is not wasted. Further, even if an error occurs again during the error processing, the dummy data is continuously recorded, so that the number of usable blocks is consumed more than necessary as compared with the information recording / reproducing apparatus shown in the related art. Such a trouble does not occur.

Further, according to the recording method of the write-once optical disc of the present invention, an optical pickup which sequentially accumulates recording data transferred from a host computer in a buffer memory and sequentially reads out the accumulated recording data while following at a constant speed. A method of recording a write-once optical disc of a track-at-once type, which sequentially records information on an optical disc via an optical disc, wherein when an error occurs during recording on the optical disc, it is determined whether or not the track being recorded is a reserved track. A second procedure for determining whether or not a certain number of blocks have been recorded before an error occurs, and a second procedure for determining whether or not a certain number of blocks have been recorded before the occurrence of an error. A third procedure for continuously recording the dummy data until the number of blocks becomes equal to or more than the number of blocks; When an error occurs in the fourth step, the dummy data is continuously recorded until the number of blocks reaches a predetermined number of blocks smaller than the predetermined number of blocks. If it occurs, it is determined that a certain number of blocks or more are recorded in the fifth procedure for repeating the fourth procedure and the second procedure, or to a certain number of blocks or more in the third procedure. In the case where the dummy data is recorded until the number of blocks reaches the predetermined number, or in the case where the dummy data is recorded until the number reaches the predetermined number of blocks or more in the fourth procedure, the sixth procedure of recording the link block lastly is provided. Features.

According to the present invention having such features,
Although the recorded data itself can only be read correctly halfway, it is recorded as a track in the same form as a normal track recorded up to the link block, so the next time a new track is added, the dummy This new track can be recorded following the track on which the data has been recorded. Further, even if an error occurs again during the error processing, the dummy data is continuously recorded, and the link block is finally recorded, so that only one track is required for the error processing.
That is, since only one track is required for error processing, the data recording track is not wasted. Further, even if an error occurs again during error processing, dummy data is continuously recorded, so that compared with the information recording / reproducing apparatus shown in the related art,
There is no problem that the number of usable blocks is unnecessarily consumed.

Further, in the recording method for a write-once optical disc according to the present invention, in the above configuration, it is preferable that the number of recording blocks until an error occurs exceeds a reference block number obtained by subtracting the predetermined block number from the predetermined block number. The method further includes a seventh procedure for determining whether the number of recording blocks exceeds the reference block number, and the process shifts from the third procedure to the fourth procedure only when the seventh procedure determines that the number of recording blocks exceeds the reference block number. It is characterized by the following. Here, the fixed number of blocks is 300 blocks which is the minimum length of one track, and the predetermined number of blocks is 150 blocks which is a trackable number of blocks. Further, the dummy data is null data or silence data.

According to the present invention having such features,
Even if an error occurs again during the error processing, the number of blocks for recording dummy data while securing the minimum length of 300 blocks of one track and securing 150 blocks that can be tracked (necessary for tracking). Can be kept to the minimum necessary number of blocks.

Further, according to the recording method of the write-once optical disc of the present invention, an optical pickup which sequentially accumulates recording data transferred from a host computer in a buffer memory and sequentially reads out the accumulated recording data while following at a constant speed. A method of recording a write-once optical disc of a track-at-once type, which sequentially records information on an optical disc via an optical disc, when an error occurs during recording on the optical disc, determines whether or not the track being recorded is a reserved track A second procedure for determining whether or not a certain number of blocks have been recorded before an error occurs, and a second procedure for determining whether or not a certain number of blocks have been recorded before the occurrence of an error. A third procedure for continuously recording the dummy data until the number of blocks becomes equal to or more than the number of blocks; In the case where an error occurs again, a fourth procedure for judging whether or not the number of recording blocks up to that time exceeds a reference block number obtained by subtracting a predetermined block number from the fixed block number; The fifth procedure of repeating the third procedure until it is determined that the number of recording blocks exceeds the reference block number according to the procedure described above, and the repetition of the fifth procedure allows the number of recording blocks to be reduced by the fourth procedure. When it is determined that the number of reference blocks has been exceeded, a sixth procedure of continuously recording dummy data until the number of predetermined blocks is smaller than the predetermined number of blocks, and recording dummy data until the number of blocks is equal to or more than the predetermined number of blocks. If an error occurs again during the operation, the seventh procedure for repeating the sixth procedure and the constant procedure in the second procedure are repeated. If it is determined that the number of blocks is recorded more than the number of blocks, or if the dummy data is recorded until the number of blocks reaches a certain number in the third procedure, or the dummy data is recorded until the number of blocks exceeds a predetermined number in the sixth procedure. If you record
Finally, an eighth procedure for recording a link block is provided.

According to the present invention having such features,
If an error occurs during recording on the optical disc and an error occurs again during the error processing, reset the error and continue the error processing again. The number of blocks to be recorded is changed from the first fixed block to a predetermined trackable block and executed. Then, when dummy data of a predetermined number or more is recorded, a link block is recorded last.

That is, although the recorded data itself can only be read correctly halfway, it is recorded as a track in the same form as a normal track recorded up to the link block. When additional recording is performed, this new track can be recorded following the track on which the dummy data is recorded.
Also, if an error occurs again during error processing,
Since the dummy data is recorded continuously and the link block is recorded last, only one track is required for error processing. That is, since only one track is required for error processing, the data recording track is not wasted. Also,
Even if an error occurs again during error processing, dummy data is continuously recorded, so that the number of usable blocks is unnecessarily consumed as compared with the information recording / reproducing apparatus described in the related art. Also does not occur.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an entire system to which a recording method for a write-once optical disc according to the present invention is applied. This system includes, for example, a CD-R (/ RW) device 1 as a write-once disc device,
And a host computer 2 for recording data by using an R (/ RW) device 1.

The CD-R (/ RW) device 1 has an interface controller (I / F controller) 11 for connecting to a host computer 2. The I / F controller 11 has a data control unit 12. And the microcomputer 17 are connected. Also, the data control unit 12
Is connected to an optical pickup 14 via a data processing unit 13 and RA as a buffer memory.
M15 is connected.

The optical pickup 14 is controlled by a drive circuit 16. The drive circuit 16
The optical pickup 14 is driven under the control of the microcomputer 17. That is, at the time of data recording, control is performed so as to move (follow) at a constant speed in the radial direction of the optical disc 4 along the recording surface of the optical disc 4. The microcomputer 17 controls each of the I / F controller 11, the data control unit 12, and the data processing unit 13.

That is, the I / F controller 11 outputs a data transfer request (transfer command) to the host computer 2 according to an instruction from the microcomputer 17. The host computer 2 sequentially transfers the recording data to the CD-R (/ RW) device 1 according to the transfer command. The transferred recording data is given to the data control unit 12 via the I / F controller 11 and is sequentially stored in the RAM 15 according to the instruction of the data control unit 12.

In the data processing section 13, signal processing (encoding) for recording data on the optical disk 4 is performed. That is, when data is recorded on the optical disc 4,
The data processing unit 13 prepares for encoding according to an instruction from the microcomputer 17, and when the preparation is completed, outputs a preparation completion command to the microcomputer 17. Microcomputer 17
Controls the data control unit 12 in response to the preparation completion command, reads out the data stored in the RAM 15, and outputs the data to the data processing unit 13. The data encoded by the data processing unit 13 is sequentially recorded on the optical disc 4 by the optical pickup 14. In this case, in this embodiment,
It is assumed that recording data is recorded on a track formed on the optical disc 4 at once by a track-at-once method.

As described above, while recording data on the optical disk 4 by the track-at-once method, a servo error occurs due to scratches or attached dust on the optical disk 4, and as a result, a recording error occurs. The error processing during recording, which is a feature of the present invention, is executed. On this occasion,
The microcomputer 17 controls the data processing unit 13 to record the dummy data on the track where the error has occurred. In order to count the number of blocks on which the dummy data is recorded, the microcomputer 17 includes a block counter 18.
Is connected.

Hereinafter, this recording error processing operation will be described with reference to the flowchart shown in FIG. That is, if a recording error occurs due to a servo error or the like while recording data on the optical disc 4, the microcomputer 17
Determines whether the track being recorded is a reserved track (step S1). Here, the reserved track is a track for recording information on the track after recording information on the PMA. On the other hand, an invisible track is a track for recording data on a track and then recording information of the track on the PMA. In other words, if the track being recorded is a reserved track (Yes in step S1), there is both PMA information and a track. In this case, the process ends without performing error processing.

On the other hand, if the track being recorded is not a reserved track, that is, if it is an invisible track (if No is determined in step S1), the error processing of the present invention is executed. That is, the next step S
In step 2, an initial value is set in the block counter 18. This initial value is the number of recorded blocks until an error occurs.

Thereafter, the microcomputer 17 executes the next step S
In step 3, the count value of the block counter 18 and the minimum length of one track set in advance (300 blocks = 4 Second).

As a result, when the count value is not 300 blocks or more (when it is determined Yes in step S3), the operation proceeds to step S4, and null data (NULL DATA) or silence data as dummy data is Block recording. Thereafter, it is checked whether or not an error has occurred (step S5). If no error has occurred, the count value of the block counter 18 is incremented (+1), and the process returns to step S3. The count value is compared with 300 blocks set internally in advance.

As described above, unless an error occurs again during the error processing for recording the dummy data (unless it is determined Yes in step S5), steps S3 to S3 are executed.
The process of step S6 is repeated until the total number of recording blocks reaches 300, which is the minimum length of one track.
Dummy data is recorded. When 300 blocks are recorded including the regular data and the dummy data (No in step S3), the microcomputer 17
Is a link block (RUN) at the end of the track.
-OUT1 block, RUN-OUT2 block, link block) are recorded (step S9). If an error occurs even during this recording, the process proceeds to step S8, which will be described later. On the other hand, when the recording of the link block is normally completed (Yes in step S10), the information of the track is recorded in the PMA (step S11), and the error processing ends.

On the other hand, if an error occurs again during the error processing for recording the dummy data (steps S3 to S3).
In the repetition process of step S6, when it is determined as Yes in step S5), the count value up to that point is the reference block number obtained by subtracting 150 blocks necessary for tracking (trackable) from 300 blocks (in this case, Is determined to be more than 150 blocks) (step S7). If the count value does not exceed 150 blocks, step S
Go to 6, increment the count value as it is,
It returns to step S3.

On the other hand, when the count value exceeds 150 blocks (when it is determined Yes in step S7)
After resetting the block counter 18 once, the reference block number is set to 150 blocks (step S8).

That is, at this point, 1
Since 50 blocks have been recorded, thereafter, by recording at least 150 blocks, 1
The minimum track length of 300 blocks can be reliably secured. That is, it is established as a track. On the other hand, even if 300 blocks, which is the minimum length of one track, can be secured, the continuous recording length of dummy data is 150
If it is less than the block, tracking cannot be performed correctly. Therefore, the minimum length of one track (3
At this point, the count value of the block counter 18 is set to 150 (blocks) in step S8 to ensure that 150 blocks required for tracking can be reliably secured. You have set. In addition, this is because if the situation that an error occurs again during error processing is repeated (this situation is likely to occur if the disc is scratched, etc.), There is also an effect that the number of used blocks (that is, the number of blocks for recording dummy data) is reduced as much as possible, and a wider data recording area is secured thereafter.

After the count value of the block counter 18 is set to 150 (blocks) in step S8, the process returns to step S3 to compare the set count value with 300 blocks set in advance. I do. Then, unless an error occurs again during the error processing for recording the dummy data (Y in step S5).
Steps S3 to S
6 is repeated, and the dummy data is
Blocks or more will be recorded. In this case, the total number of recording blocks is 300 blocks or more including the regular data and the dummy data.

Then, when 150 blocks of dummy data are continuously recorded (No in step S3), the microcomputer 17 adds a link block (RUN-OUT1 block, RUN-OUT block) at the end of the track. OU
T2 block, link block) are recorded (step S9). If an error occurs even during this recording, the process proceeds to step S8 again, where the block counter 18 is reset once, and then set to the reference block number of 150 blocks. On the other hand, when the recording of the link block is normally completed (Yes in step S10), the information of the track is recorded in the PMA (step S11), and the error processing ends.

That is, according to the write-once optical disc recording method of the present invention, when an error further occurs during the error processing for recording the dummy data, the recording of the dummy data is further extended, When 300 tracks, which is the minimum length of one track, can be secured, the extension is switched to 150 blocks required for tracking. When 150 or more blocks of dummy data have been recorded continuously, a link block indicating the end of one track is recorded. As a result, the minimum number of blocks for recording dummy data can be kept to the minimum necessary while securing 300 blocks, which is the minimum length of one track, and 150 blocks required for tracking. Further, there is an effect that the number of blocks used for error processing (that is, the number of blocks for recording dummy data) is reduced as much as possible, and a wider data recording area can be secured thereafter.

[0038]

According to the write-once optical disc recording method of the present invention, when an error further occurs during the error processing for recording the dummy data, the recording of the dummy data is further extended. When a minimum track length of 300 tracks can be secured, the extension is switched to 150 blocks required for tracking. Then, when the dummy data can be continuously recorded for 150 blocks or more,
A link block indicating the end of one track is recorded. As a result, although the recorded data itself can be correctly read only halfway, the track is recorded in the same form as the normal track recorded up to the link block, so a new track was added next. At times, the new track can be recorded following the track on which the dummy data is recorded. In addition, it is possible to secure the minimum length of 300 blocks for one track, and also secure 150 blocks required for tracking, while keeping the number of blocks for recording dummy data to the minimum necessary number. In addition, various effects are obtained such that the number of blocks used for error processing (that is, the number of blocks for recording dummy data) is reduced as much as possible, and a wider data recording area can be secured thereafter. is there.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an entire system to which a recording method for a write-once optical disc according to the present invention is applied.

FIG. 2 is a flowchart illustrating a recording method for a write-once optical disc according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 CD-R (/ RW) device 2 Host computer 4 Optical disk (write-once optical disk) 11 I / F controller 12 Data control unit 13 Data processing unit 14 Optical pickup 15 RAM (buffer memory) 16 Drive circuit 17 Microcomputer 18 Block counter

Claims (8)

[Claims] 1. A track-at-once method for sequentially storing recording data transferred from a host computer in a buffer memory and sequentially recording the stored recording data on an optical disk via an optical pickup that follows at a constant speed while sequentially reading the stored recording data. A write-once optical disc recording method, comprising: a first step of determining whether a track being recorded is a reserved track when an error occurs during recording on the optical disc; Has 1
A second procedure for determining whether or not the minimum track length of 300 blocks has been recorded; and a third procedure for continuously recording dummy data until the track length has reached 300 blocks or more if not recorded. Procedure: If an error occurs again during the recording of the dummy data, the number of recording blocks up to that time is 30
4th judgment is made as to whether or not the number of reference blocks obtained by subtracting 150 trackable blocks from 0 blocks is exceeded
A fifth procedure of repeating the third procedure until it is determined by the fourth procedure that the number of recording blocks exceeds the reference block number; and a fourth procedure of the fourth procedure is repeated by the fifth procedure. If it is determined that the number of recording blocks exceeds the reference number of blocks according to the above procedure, a sixth procedure of continuously recording dummy data until the number of blocks reaches 150 or more; If an error occurs again during the operation, a seventh procedure for repeating the sixth procedure, and if it is determined that 300 or more blocks have been recorded in the second procedure, or the third procedure At 3
If dummy data is recorded until the number of blocks reaches 00 or more, or if dummy data is recorded until the number of blocks reaches 150 or more in the sixth procedure, an eighth procedure of finally recording a link block is provided. A recording method for a write-once optical disc, characterized in that: 2. A track-at-once method for sequentially storing recording data transferred from a host computer in a buffer memory and sequentially recording the stored recording data on an optical disk via an optical pickup that follows at a constant speed while sequentially reading the stored recording data. A write-once optical disc recording method, comprising: a first step of determining whether a track being recorded is a reserved track when an error occurs during recording on the optical disc; The second procedure is to determine whether or not a certain number of blocks have been recorded before an error occurs. If no more than a certain number of blocks have been recorded, continue recording dummy data until the number of blocks exceeds a certain number A third procedure, and when an error occurs during the recording of the dummy data, 4 to continue to record the dummy data until the less than predetermined number of blocks from the constant number of blocks
If an error occurs during the recording of the dummy data until the number of blocks reaches a predetermined number or more, the fourth step
A fifth procedure that repeats the above procedure, and if it is determined that a certain number of blocks or more are recorded in the second procedure, or if dummy data is recorded until the number of blocks exceeds a certain number in the third procedure Or a sixth step of finally recording a link block when dummy data is recorded until the number of blocks reaches a predetermined number or more in the fourth procedure. Method. 3. The method according to claim 1, further comprising: determining whether the number of recording blocks until an error occurs exceeds a reference block number obtained by subtracting the predetermined block number from the fixed block number. 3. The write-once optical disc according to claim 2, wherein the procedure shifts from the third procedure to the fourth procedure only when it is determined that the number of recording blocks exceeds the reference block number in the procedure of (7). Recording method. 4. The recording method for a write-once optical disc according to claim 2, wherein the fixed number of blocks is 300 blocks, which is the minimum length of one track. 5. The recording method for a write-once optical disc according to claim 2, wherein the predetermined number of blocks is a number of blocks that can be tracked. 6. The recording method for a write-once optical disc according to claim 2, wherein the predetermined number of blocks is 150 blocks. 7. The recording method for a write-once optical disc according to claim 1, wherein the dummy data is null data or silent data. 8. A track-at-once method for sequentially storing recording data transferred from a host computer in a buffer memory and sequentially recording the stored recording data on an optical disk via an optical pickup that follows at a constant speed while sequentially reading out the stored recording data. A write-once optical disc recording method, comprising: a first step of determining whether a track being recorded is a reserved track when an error occurs during recording on the optical disc; The second procedure is to determine whether or not a certain number of blocks have been recorded before an error occurs. If no more than a certain number of blocks have been recorded, continue recording dummy data until the number of blocks exceeds a certain number And if an error occurs again during the recording of the dummy data, A fourth procedure for judging whether or not the number of recording blocks up to this time exceeds a reference block number obtained by subtracting a predetermined number of blocks from the fixed number of blocks; and A fifth procedure for repeating the third procedure until it is determined that the number of recording blocks exceeds the reference block number by the fourth procedure by repeating the fifth procedure. A sixth procedure of continuously recording dummy data until the number of blocks reaches a predetermined number of blocks smaller than the predetermined number of blocks; and a case where an error occurs again during the recording of the dummy data until the number of blocks reaches the predetermined number of blocks or more. A seventh procedure for repeating the sixth procedure, and a case where it is determined in the second procedure that a certain number of blocks or more are recorded. Alternatively, in the case where dummy data is recorded until the number of blocks reaches a certain number or more in the third procedure, or in the case where dummy data is recorded until the number of blocks reaches a predetermined number or more in the sixth procedure, a link block is finally added. Recording a write-once optical disc, comprising: an eighth procedure for recording.