JP3704767B2 - Information recording device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention The present invention relates to an information recording apparatus. Specifically, when data of the second sector length is recorded on the recording medium of the first sector length, the data of the second sector length is held in the first memory means, and this data is stored in the sector of the recording medium. When this is done, there is an area where no data exists in one or both of the sector of the recording medium where the recording of the data of the second sector length is started and the recording of the data of the second sector length. If it occurs, the data corresponding to the area without this data is transferred to the first memory means, and the data held in the first memory means is read out with the first sector length and recorded on the recording medium. To do.
[0002]
[Prior art]
In a conventional optical disk apparatus, a track formed on an optical disk is divided into a plurality of fixed-length sectors, and data is recorded and reproduced in units of sectors.
[0003]
For example, in an optical disk having a physical sector size of 512 bytes (hereinafter referred to as “512-byte sector disk”), as shown in FIG. 11A, the data field is 600 bytes and the user data area is 512 bytes. Data is recorded in the user data area. An 8-byte CRC (Cyclic Redundancy Code) for error detection and an ECC (Error Correction Code) for error detection / correction of 5 × 16 bytes are added to the 512-byte user data area data. In an optical disk having a physical sector size of 2 Kbytes (hereinafter referred to as “2 Kbyte sector disk”), as shown in FIG. 11B, the data field is 2352 bytes and the user data area is 2 Kbytes. Data is recorded in In addition, a 48-byte error detection CRC and a 16 × 16-byte error detection / correction ECC are added to the data in the user data area of 2 Kbytes. A synchronization signal is added to the data field.
[0004]
Since this 2 Kbyte sector disk has a larger percentage of user data area per unit sector than a 512 byte sector disk, the data recording capacity can be increased. In addition, since the interleave length can be increased, the error correction capability can be improved as compared with the 512-byte sector disk.
[0005]
[Problems to be solved by the invention]
By the way, when the operating system of the data processing apparatus assumes that the physical sector size is 512 bytes, the data read from the 2 Kbyte sector disk cannot be used as it is because the sector size is 2 Kbytes.
[0006]
Therefore, in the present invention, data can be processed with a predetermined sector size using recording media having different sector sizes. Provide information recording device Is.
[0007]
[Means for Solving the Problems]
The information recording apparatus according to the present invention comprises first and second memory means for holding data, control means for controlling the data write operation and data read operation of the first and second memory means, Of the first sector length Data recording means for recording data on the recording medium, the first memory means holding data of a second sector length shorter than the first sector length, and the second memory means Is When the recording process of the data of the second sector length is continuously performed, the data of the second sector length recorded in the sector of the recording medium when the recording is finished in each recording process is held. When repeatedly recording data of the second sector length at the same position on the medium, when the data of the second sector length held in the first memory means is made to correspond to the sector of the recording medium The data of the sector of the recording medium where recording is started by the recording process and the sector of the recording medium where recording is ended by the recording process shall be held, In the control means, when the second sector length data held in the first memory means is made to correspond to the sector of the recording medium, the recording medium sector from which recording of the second sector length data is started and When an area without data occurs in one or both of the sectors of the recording medium where the recording of the second sector length data is completed, the data corresponding to the area without the data is transferred from the second memory means. The data recording means transfers the data transferred from the second memory means and the data of the second sector length held in the first memory means with the first sector length. Recording is performed sequentially from the sector of the recording medium from which recording of the data of the second sector length is started.
[0008]
In addition, data reading means for reading data from the recording medium is provided. When the data reading means associates the data of the second sector length held in the first memory means with the sector of the recording medium, the data reading means The data reading operation is performed from the sector of the recording medium where the recording of the data of the sector length of the first recording sector to the sector of the recording medium where the recording of the data of the second sector length is completed. Only the data of the sector to be finished is supplied to the second memory means.
[0010]
In the present invention, data of the second sector length is held in the first memory means. The second memory means has the second sector length data when the data of the second sector length held in the first memory means is made to correspond to the sector of the recording medium of the first sector length. The data of one or both of the sector of the recording medium where the recording of the recording medium starts and the recording of the sector of the recording medium where the recording of the data of the second sector length ends are held. That is, when the first sector length is “n” times the second sector length, the data set based on the quotient obtained by dividing the sector number of the data of the second sector length by “n” Data of one or both of the sector where recording is started and the sector where recording is finished is held in the second memory means.
[0011]
At this time, if the interval between the sector where data recording is started and the sector where recording is ended is small, a read operation from the sector where recording starts to the sector where recording ends is performed. Only the data of one or both of the sector where the recording is started and the sector where the recording is finished is held in the second memory means.
[0012]
Here, when the data of the second sector length held in the first memory means is made to correspond to the sector of the recording medium, the recording medium sector and data from which the recording of the data of the second sector length is started When an area without data occurs in one or both of the sectors of the recording medium where recording of the data is completed, data corresponding to the area without data is transferred from the second memory means to the first memory means. Then, the data of the second sector length held in the first memory means is recorded as the data of the first sector length on the recording medium.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings. Information recording equipment Embodiments will be described.
[0014]
FIG. 1 relates to the present invention. Information recording equipment The configuration is shown. In FIG. 1, an optical disk 10 which is a data recording medium is an optical disk (2 Kbyte sector disk) having a physical sector size of 2 Kbytes. In the control unit 20 which is a control unit and constitutes a data recording unit and a data reading unit, a data reading process and a writing processing unit in the reading processing unit 21 are communicated with a data processing device (for example, a computer device) 30 described later. 25, data writing processing in sector 25, sector size conversion processing in sector size conversion units 23 and 24, and data writing and reading processing in buffer memory unit 22 and cache memory unit 26 are performed. The control unit 20 is constituted by a microcomputer or the like.
[0015]
In the reading processing unit 21 constituting the data reading means, data is read from the optical disc 10 in units of 2 Kbytes, and error detection and correction are performed. The data reading means includes a control unit 20 and a read processing unit 21. The corrected data in units of 2 Kbytes is supplied to the buffer memory unit 22 which is the first memory unit and the cache memory unit 26 which is the second memory unit. Further, the corrected 2K byte unit data is supplied to the sector size conversion unit 24 to be 512 byte unit data. The 512-byte data is supplied to the buffer memory unit 22. The data in units of 2 Kbytes supplied to the buffer memory unit 22 and the cache memory 26 or the data in units of 512 bytes supplied to the buffer memory unit 22 are transferred to predetermined areas of the buffer memory unit 22 and the cache memory 26 by the control unit 20. Written.
[0016]
The data written in the buffer memory unit 22 is read by the sector size conversion unit 23 in units of 512 bytes and supplied to the data processing device 30. This data processing apparatus 30 assumes that the physical sector size is 512 bytes, and the sector size conversion unit 23 performs processing using data in units of 512 bytes.
[0017]
From the data processing device 30, 512-byte data is supplied to the buffer memory unit 22 and held therein. The data held in the buffer memory unit 22 is read out in units of 2 Kbytes by the sector size conversion unit 24 constituting the data recording means and supplied to the write processing unit 25. The data recording means includes a control unit 20, a sector size conversion unit 24, and a write processing unit 25.
[0018]
In the writing processing unit 25, an error detection / correction code is added to the data read in units of 2K bytes, and data is recorded on the optical disc 10.
[0019]
Data read from the optical disk 10 in units of 2 Kbytes is stored in the cache memory 26, and data written in the cache memory unit 26 is transferred to the buffer memory unit 22.
[0020]
Then configured like this Information recording equipment The operation will be described.
[0021]
The sector length of a 2 Kbyte sector disk is four times the sector length of 512 bytes. Therefore, the “n” sector of the 2 Kbyte sector shown in FIG. 2A corresponds to the “(4n) to (4n + 3)” sectors of the 512 byte sector as shown in FIG. 2B.
[0022]
For this reason, a predetermined amount of data is read from a specified address by a data read command from the data processor 30 assuming that the physical sector size is 512 bytes, for example, data for sector numbers “AR” to “KR” is read. Is performed, the sector number “AR” is divided by “4” in step ST1 of the flowchart of FIG. 3 showing the data reproduction process. The quotient “QRA” obtained at this time is the reproduction start sector number of the data on the 2 Kbyte sector disk. The remainder “MRA” is set as a reproduction start offset, and the process proceeds to step ST2.
[0023]
In step ST2, “KR” is added to the sector number “AR” to obtain “BR”. The quotient “QRB” obtained by dividing “BR” by “4” is the reproduction end sector number of the 2 Kbyte sector disk. The remainder “MRB” is set as a reproduction end offset, and the process proceeds to step ST3. When “MRB” is “0”, “QRB” indicates the sector number next to the reproduction end sector.
[0024]
In step ST3, it is determined whether or not the remainder “MRB” is “0”. When the remainder “MRB” is “0”, the process proceeds to step ST4, and when it is not “0”, the process proceeds to step ST5.
[0025]
In step ST4, a value obtained by subtracting "QRA" from "QRB" is set as the reproduction sector length "LR". When the reproduction sector length “LR” is calculated, the process proceeds to step ST6.
[0026]
In step ST5, “1” is added to the value obtained by subtracting “QRA” from “QRB” to obtain the reproduction sector length “LR”. When the reproduction sector length “LR” is calculated, the process proceeds to step ST6.
[0027]
In step ST6, the read processing unit 21 shown in FIG. 1 reads the data DQRA to DQRL corresponding to the “LR” sector from the reproduction start sector number “QRA” of the optical disc 10 shown in FIG. 4A, as shown in FIG. 4B. The data is written sequentially from a predetermined address “PR” in the buffer memory unit 22.
[0028]
In step ST7, based on the reproduction start offset “MRA”, the reproduction start position is offset by 512 bytes × “MRA” from the predetermined address “PR” of the buffer memory unit 22. Data DQRA read from this offset position is used as reproduction data DRA from sector number “AR” as shown in FIG. 4C. Thereafter, the data DQRA to DQRL written in the buffer memory unit 22 are read out by the sector size conversion unit 23 by 512 bytes × “KR” in units of 512 bytes, and from the sector number “AR” to “KR” sectors. The reproduction data DRA to DRK are transferred to the data processing device 30.
[0029]
As described above, the data of the sector including the desired data is reproduced from the 2 Kbyte sector disk and written to the buffer memory unit 22, and only the desired data from the data written to the buffer memory unit 22 is in 512-byte units. Since the data is read by the sector size conversion unit 23 and supplied to the data processing device 30, even the data recorded on the 2 Kbyte sector disk is processed by the data processing device 30 assuming that the physical sector size is 512 bytes. be able to.
[0030]
Next, a case where data from the data processing device 30 is recorded on the optical disc 10 will be described. When recording the recording data DWA to DWK from the data processing device 30 by the sector number “AW” to “KW” sectors, the sector number “AW” is set in step ST11 of the flowcharts of FIGS. Divide by “4”. The quotient “QWA” obtained at this time is the recording start sector number of the data on the 2 Kbyte sector disk. The remainder “MWA” is set as a recording start offset, and the process proceeds to step ST12.
[0031]
In step ST12, “KW” is added to the sector number “AW” to obtain “BW”. The quotient “QWB” obtained by dividing “BW” by “4” is the recording end sector number of the 2 Kbyte sector disk. The remainder “MWB” is set as a recording end offset, and the process proceeds to step ST13. When “MWB” is “0”, “QWB” indicates the sector number next to the recording end sector.
[0032]
In step ST13, it is determined whether or not the remainder “MWB” is “0”. Here, when the remainder "MWB" is "0", the process proceeds to step ST14, and when not "0", the process proceeds to step ST15.
[0033]
In step ST14, a value obtained by subtracting "QWA" from "QWB" is set as the recording sector length "LW". When the recording sector length “LW” is calculated, the process proceeds to step ST16.
[0034]
In step ST15, “1” is added to the value obtained by subtracting “QWA” from “QWB” to obtain the recording sector length “LW”. When the recording sector length “LW” is calculated, the process proceeds to step ST16.
[0035]
In step ST16, based on the recording start offset “MWA”, the recording data DWA to DWK shown in FIG. 7A has a recording start position of 512 bytes × from a predetermined address “PW” of the buffer memory unit 22 as shown in FIG. 7B. The data is offset by “MWA”, and data of 512 bytes × “KR” is written from this offset position, and the process proceeds to step ST17.
[0036]
In step ST17, it is determined whether or not the recording start offset “MWA” is “0”. If "MWA" is "0", the process proceeds to step ST21. If "MWA" is not "0", the process proceeds to step ST18.
[0037]
In step ST18, it is determined whether or not the data recorded in the sector of the recording start sector number “QWA” of the optical disc 10 is written in the cache memory unit 26. If data has not been written, the process proceeds to step ST19. If data has been written, the process proceeds to step ST20.
[0038]
In step ST19, the data recorded in the sector of the recording start sector number “QWA” is reproduced from the optical disc 10 and written in the cache memory unit 26. When the recording of this data ends, the process proceeds to step ST20.
[0039]
In step ST20, the data corresponding to the offset of the first 512 bytes × “MWA” is read from the data DQWA of the sector with the sector number “QWA” written in the cache memory unit 26 shown in FIG. It is written from the predetermined address “PW”, and the process proceeds to step ST21.
[0040]
In step ST21, it is determined whether or not the recording end offset “MWB” is “0”. If “MWA” is not “0”, the process proceeds to step ST22. If “MWB” is “0”, the process proceeds to step ST25.
[0041]
In step ST22, it is determined whether or not the data recorded in the sector of the recording end sector number “QWB” of the optical disc 10 is written in the cache memory unit 26. If data has not been written, the process proceeds to step ST23, and if data has been written, the process proceeds to step ST24.
[0042]
In step ST23, the data recorded in the sector of the recording end sector number “QWB” is reproduced from the optical disc 10 and written in the cache memory unit 26. When the recording of this data ends, the process proceeds to step ST24.
[0043]
In step ST24, as shown in FIG. 7B, when the data recording area is divided every 2K bytes from the predetermined address “PW” of the buffer memory unit 22 in correspondence with the 2K byte sector disk, the recording data amount is small. The data in the corresponding area is written from the data DQWB of the sector with the sector number “QWB” of the cache memory unit 26 shown in FIG. 7C to the area NW where data is not written, and the process proceeds to step ST25.
[0044]
In step ST25, data corresponding to the sector length “LW” from the predetermined address “PW” of the buffer memory unit 22 is sequentially written from the recording start sector number “QWA” of the optical disc 10 as shown in FIG. 7D. Since “QWB” indicates the sector number next to the recording end sector when “MWB” is “0”, the sector number of the recording end sector is “MWB” is not “0”. When “QWB” and “MWB” are “0”, “QWB-1” is set.
[0045]
In step ST26, it is determined whether or not the remainder “MWA” is “0”. When the remainder “MWB” is not “0”, the process proceeds to step ST27, and when it is “0”, the process proceeds to step ST28.
[0046]
In step ST27, 2 Kbytes of data for one sector from a predetermined address “PW” in the buffer memory unit 22 is written in the cache memory 26 as shown in FIG. 7E, and then the process proceeds to step ST28.
[0047]
In step ST28, it is determined whether or not the remainder “MWB” is “0”. Here, when the remainder “MWB” is “0”, the operation is terminated, and when it is not “0”, the process proceeds to step ST29.
[0048]
In step ST29, 2 Kbytes of data for one sector from the address “SV” obtained by the equation (1), that is, when the data recording area is divided into 2 Kbytes as shown in FIG. The data of the 2 Kbyte area in which the data DQWB of the sector with the sector number “QWB” of the cache memory unit 26 is recorded in the area NW where the amount of recording data is not written is written in the cache memory 26 as shown in FIG. 7E. After that, the operation is finished.
[0049]
SV = PW + (LW-1) × 2048 (1)
As described above, when data supplied from the data processing device 30 assuming a physical sector size of 512 bytes is written into the buffer memory unit 22 and further converted into data of 2 Kbyte sectors, the data is insufficient. Since the data read from the 2 Kbyte sector disk written in the cache memory unit 26 is transferred to the buffer memory unit 22 to compensate for the shortage, 512 byte sector length data can be recorded on the 2 Kbyte sector disk. it can.
[0050]
In the flowcharts of FIGS. 5 and 6 described above, data is written from the offset position of the buffer memory unit 22 in step ST16, and then the data of the optical disc 10 is written to the cache memory unit 26 in the processing of steps ST17 to ST24. Although the data is transferred to the memory unit 22, if the processing from step ST17 to step ST24 is performed in parallel with the processing of step ST16, data can be written in a shorter time.
[0051]
In step ST19, step ST20, step ST23, and step ST24, the data recorded on the optical disc 10 is reproduced and the data of 2 Kbytes is written in the cache memory unit 26, and the required data is written in 512 bytes. The transfer from the cache memory unit 26 to the buffer memory unit 22 is performed, but the reproduction data of the optical disk 10 is converted into 512-byte unit data by the sector size conversion unit 24, and only necessary data is buffered in 512-byte units. 22 may be written.
[0052]
Next, a case where data recording is continuously performed will be described. When data is continuously recorded as shown in FIG. 8A, when the first data recording is completed by the processing from step ST11 to step ST29 described above, step ST29 is performed when the remainder “MWB” is not “0”. As a result of this process, as shown in FIG. 8B, 2 Kbytes of data for one sector corresponding to the end position of the data is written into the cache memory unit 26. It should be noted that the data in the hatched area indicates data read from the optical disc 10. Further, the data in the cache memory unit 26 corresponding to the first data recording start position is the same as the above-described data recording operation, and the description thereof will be omitted.
[0053]
As described above, since 2 Kbytes of data for one sector is written in the cache memory unit 26, in the second data recording process, the process in step ST19, that is, the sector of the recording start sector number of the optical disc 10 is started. Data reproduction processing is unnecessary. Similarly, when the second data recording is completed, 2 Kbytes of data corresponding to the end position of the data for one sector is written in the cache memory unit 26, so that the optical disk 10 is recorded in the third data recording process. This also eliminates the need to reproduce data from the sector having the recording start sector number.
[0054]
Further, when the data recording process is continuously performed, the data recording process can be newly performed using the data written in the cache memory unit 26 in the previous data recording process. There is no need to read data from the optical disk 10 every time, and the data recording process can be completed in a short time.
[0055]
Next, a case where data is repeatedly recorded at the same position on the optical disc 10 will be described. When data is repeatedly recorded at the same position as shown in FIG. 9A, the first data recording is performed by the processing from step ST11 to step ST29 described above. Here, when the first data recording is completed, if the remainder “MWA” is not “0”, 2 Kbytes of data corresponding to the data recording start position corresponding to the data recording start position is stored in the cache memory unit by the process of step ST27. 26 is written. Further, when the remainder “MWB” is not “0”, 2 Kbytes of data for one sector corresponding to the data recording end position is written in the cache memory unit 26 by the process of step ST29.
[0056]
Therefore, in the second data recording process, the process in step ST19, that is, the data reproduction process from the sector of the recording start sector number of the optical disc 10 is not required. Further, the process in step ST23, that is, the process of reproducing data from the sector having the recording end sector number of the optical disc 10 is not required.
[0057]
As described above, when data is repeatedly recorded at the same position, new data recording processing can be performed using data written in the cache memory unit 26 in the previous data recording processing. There is no need to read data from the optical disk 10 every time, and the data recording process can be completed in a short time.
[0058]
In the data recording operation, when data is read from the sector having the recording start sector number of the optical disc 10 in step ST19 and data is read again from the sector having the recording end sector number in step ST23, FIG. As shown in the figure, when the amount of recording data is small and the interval between the recording start sector number sector and the recording end sector number sector is short, there is a waiting time for reading data from the recording end sector number sector.
[0059]
Therefore, if the interval between the sector with the recording start sector number and the sector with the recording end sector number is small, the data reading operation is performed from the sector with the recording start sector number to the sector with the recording end sector number in step ST19. As shown, dummy read processing is performed in which only the data of the sector of the recording start sector number and the sector of the recording end sector number is written in the cache memory unit 26. By this dummy read processing, the data of the sector of the recording start sector number and the sector of the recording end sector number can be written in the cache memory unit 26 without causing a data read waiting time. The command for reading data from the sector having the recording start sector number to the sector having the recording end sector number is performed by stacking a plurality of commands for reading data from one sector, for example.
[0060]
As described above, by performing the dummy read process, the data recording process can be performed in a short time even when the interval between the recording start sector number sector and the recording end sector number sector is small.
[0061]
As described above, according to the above-described embodiment, when the sector length of the recording medium is “n” times the sector length of the recording data, the sector number of the data written in the buffer memory unit 22 is set to “n”. The sector of the recording medium where data recording is started and the sector of the recording medium where recording is ended are set based on the quotient and remainder obtained by dividing "." In addition, when the recording data is converted into the recording medium sector length, if data shortage occurs in the recording medium sector, the recording data is set to the recording medium sector length using the data recorded on the recording medium. The
[0062]
For this reason, for example, data can be recorded / reproduced on the optical disk 10 having a sector length of 2 Kbytes as a recording medium, even if the data processor 30 is assumed to have a physical sector size of 512 bytes. The data processing device 30 that is assumed to have 512 bytes can use a 2 Kbyte recording medium that has a large recording capacity and high error correction capability.
[0063]
In the above-described embodiment, data on the optical disk 10 having a sector length of 2 Kbytes is converted to data having a sector length of 512 bytes and output. However, data having a sector length of 2 Kbytes is output from the sector. Not only can the data be converted to data having a length of 512 bytes, but data of other sector lengths can be easily converted to data of different sector lengths. Of course, the recording medium is not limited to an optical disc, and may be a recording medium using magnetism or the like.
[0064]
【The invention's effect】
According to the present invention, the first memory means holds the data of the second sector length, and the sector of the recording medium on which the recording of the data of the second sector length is started and the data of the second sector length The data of one or both of the sectors of the recording medium for which the recording is completed is held in the second memory means. When the data of the second sector length of the first memory means is made to correspond to the sector of the recording medium of the first sector length, the recording medium sector and data from which recording of the data of the second sector length is started When an area without data occurs in one or both of the sectors of the recording medium where recording of the data is completed, data corresponding to the area without data is transferred from the second memory means to the first memory means. Thus, the second sector length data held in the first memory means is recorded as the first sector length data on the recording medium.
[0065]
For this reason, data can be recorded even on a recording medium having a different sector length, a large recording capacity, and a high error correction capability.
[0066]
When the interval between the sector where data recording is started and the sector where recording is finished is small, a read operation from the sector where recording is started to the sector where recording is finished is performed for a short time. Only data of one or both of the sector where recording is started and the sector where recording is finished is held in the second memory means.
[0067]
Therefore, the second sector length data can be recorded in a short time on the first sector length recording medium.
[Brief description of the drawings]
FIG. 1 relates to the present invention. Information recording equipment It is a figure which shows the structure of embodiment.
FIG. 2 is a diagram illustrating a relationship between a 2 Kbyte sector and a 512 byte sector.
FIG. 3 is a flowchart showing data reproduction processing;
FIG. 4 is a diagram illustrating a data reproduction process.
FIG. 5 is a flowchart showing a data recording process.
FIG. 6 is a flowchart showing a data recording process.
FIG. 7 is a diagram illustrating a data recording process.
FIG. 8 is a diagram showing continuous data recording processing;
FIG. 9 is a diagram showing data repetitive recording processing;
FIG. 10 is a diagram illustrating a recording process when the amount of data is small.
FIG. 11 is a diagram showing a configuration of sectors with sector lengths of 512 bytes and 2 Kbytes.
[Explanation of symbols]
10 Optical disc
20 Control unit
21 Read processing section
22 Buffer memory section
23 Sector size converter
24 Sector size converter
25 Write processing section
26 Cache memory section
30 Data processing device

Claims (3)

First and second memory means for holding data;
Control means for controlling the data write operation and data read operation of the first and second memory means;
Data recording means for recording data on a recording medium having a first sector length ,
The first memory means holds data having a second sector length shorter than the first sector length,
In the second memory means, when the recording process of the data of the second sector length is continuously performed, the second memory unit is recorded in the sector of the recording medium when recording is completed in each recording process. When the recording process of the second sector length data is repeatedly performed at the same position on the recording medium, the second data stored in the first memory means is stored. When the sector length data corresponds to the sector of the recording medium, the data of the sector of the recording medium that starts recording by the recording process and the sector of the recording medium that ends recording by the recording process are retained. Shall be
In the control means, when the second sector length data held in the first memory means is made to correspond to the sector of the recording medium, the recording of the second sector length data is started. If an area without data occurs in one or both of the recording medium sector and the recording medium sector where the recording of the second sector length of data ends, the data corresponding to the area without the data is stored. Transfer from the second memory means to the first memory means;
In the data recording means, the data transferred from the second memory means and the data of the second sector length held in the first memory means are read out with the first sector length to read the second sector An information recording apparatus for sequentially recording from a sector of the recording medium on which recording of long data is started. The first sector length is “n” times the second sector length,
The sector of the recording medium where the recording of the data of the second sector length is started and the sector of the recording medium where the recording of the data of the second sector length is finished are held in the first memory means. 2. The information recording apparatus according to claim 1, wherein the information recording apparatus is set based on a quotient obtained by dividing the sector number of the second sector length data by "n". Data reading means for reading data from the recording medium,
In the data reading means, when the data of the second sector length held in the first memory means is made to correspond to the sector of the recording medium, it corresponds to the recording start position of the data of the second sector length. The recording medium corresponding to the recording start position and the recording end position is read out from the sector of the recording medium to the sector of the recording medium corresponding to the recording end position of the data of the second sector length. 2. An information recording apparatus according to claim 1, wherein only the data of said sector is supplied to said second memory means.

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