JPH0453071A - Information recording method - Google Patents

Abstract

PURPOSE:To effectively utilize recording capacity of a recording medium without complicating verify operation and alternate management by making a sector size variable in accordance with an information amt. of an information file to be recorded. CONSTITUTION:A series of information is recorded to a recording medium having plural tracks for recording information. In this case, whether the tracks should be divided into plural sectors or not is decided in accordance with the information amt. of a series of information, and if the division is decided, a size which is enough to record a series of the information, having the min. information capacity is selected out of plural sector sizes having different information capacities. Then, based on a decision and a selecting result, a process for recording information to a undivided track or a sector formed by dividing a track by a selected size and management information including information showing the decision and the selecting result are recorded to the aforementioned recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recording a series of information on a recording medium provided with a plurality of tracks.

[Conventional technology]

2. Description of the Related Art Various types of media such as optical disks, optical cards, and optical tapes have been known for recording and reproducing information using light. Each of these has its own characteristics and can be used in different ways depending on the purpose and application. Among them, optical cards are easy to manufacture, have good portability, and are easy to access. 3. These optical cards are expected to become more and more popular. In these optical cards, multiple tracking tracks are provided parallel to the long side of the card, and the space between the two tracking tracks is used as an information track for recording information. is common. This tracking track is used as a kite for auto-tracking (AT) to control the optical spot not to deviate from a predetermined information track when scanning a light spot for recording and reproducing information when recording information. Furthermore, in actual recording and reproducing of information, autofocus (AF) is also used to control the light spot to accurately focus on the surface of the recording medium. These AT' and AF are common techniques that have been conventionally used in devices that record and reproduce information using light.

For optical cards, there are two types: one that uses the entire recording capacity of one information track as one sector (in other words, it is not divided into sectors), and one that uses the entire recording capacity of one information track as one sector (in other words, it is not divided into sectors), and one that uses the entire recording capacity of one information track as one sector (in other words, it is not divided into sectors). A device has been devised to be used. In the latter case, as with floppy disks, all tracks must have the same capacity per sector (sector size) and the number of sectors per rack, or all tracks may be logically divided into multiple areas. It is common to divide the area physically or physically and have the same sector size and number of sectors within one area.

Currently, optical cards are of the write-once type where information cannot be erased once recorded. Furthermore, the information recording density of optical recording media is higher than that of floppy disks, etc., and the raw error rate is also poor. Therefore, when recording, a powerful error correction code (FCC) is usually added. Furthermore, after recording the information, the recorded information is reproduced, and a check is made to see if it was recorded correctly (hereinafter referred to as verify), and if an error is found, the recorded information is re-recorded at another location.

As the other location, there are methods that use the next track or sector, and methods that use an alternative area secured in advance at a distant location. In the latter case, it is necessary to separately manage (alternative management) which error track or sector information is recorded in which alternative track or sector.

[Problem that the invention is trying to solve]

By the way, if l track is made into 1 sector (not divided into sectors), even if only 1 byte is recorded, l
Truck (-The capacity of one truck for boat fishing is 512 bytes ~
1024 bytes), resulting in the problem that the storage capacity of the card cannot be used effectively.

On the other hand, if the track is divided into multiple sectors in advance and the amount of information file (a series of mutually related information) to be recorded is large, this information file may be recorded across many sectors. become. In this case, there were problems such as the verification operation taking time and alternative management becoming complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide an information recording method that solves the above-mentioned problems of the prior art and can effectively utilize the recording capacity of a recording medium without complicating verify operations and alternative management.

[Means and effects for solving the problem] The above object of the present invention is to provide a method for recording a series of information on a recording medium having a plurality of tracks for recording information, in which the amount of information in the series of information is increased. Accordingly, the process of determining whether or not to divide the track into a plurality of sectors, and when it is determined to divide the track, recording the series of information from among a plurality of sector sizes having different information capacities; in minutes, and -
a step of selecting a size with the smallest information capacity; and a step of recording the information in a track that is not divided or in sectors formed by dividing the track into selected sizes based on the results of the judgment and selection. This is achieved by an information recording method characterized by comprising the steps of: recording management information including information indicating the results of the judgment and selection on the medium. .

In the present invention, if a method having the following characteristics is adopted, more efficient information recording and management can be performed.

■When dividing a track into sectors, ensure that only sectors of the same sector size exist on each track1. ■Verify each sector or track, and if there is an error, verify the next sector or Re-recording on the track 3. If the capacity of the information noisle to be recorded is thicker than half of the recording capacity of one track, proceed to step 5 without dividing the rack into sectors. , ] 1 - Execute Helinoa 1' for each rack recording, and if an error occurs, repeat the operation to re-record on the next track until all information has been recorded. If the storage capacity of the file is 1-minute, select ii and ii. Select the smallest sector and record it in the D1 sector, D line, and 1 file. After recording, verify it and if there is an error, record this file in another location.61 According to the present invention, In this case, since at least l sectors of recording space with the same sector size exist on the same track, re-recording can be performed in the next sector.

The present invention has the following effects: (1) In the case of a verify error, the information is re-recorded in the next sector or rack, so alternative management is unnecessary and information management is simple.

(2) Verification is performed in units of one track or after recording one file (l sector), so there is no wasted movement or wasted time.

■Since the sector size is varied depending on the capacity of the information file to be recorded, the capacity of the card can be used effectively.

〔Example〕

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

FIG. 5 is a schematic plan view showing an optical card used in implementing the present invention. In FIG. 5, a large number of information tracks 4 extending in the L-F direction are arranged in parallel on the information recording surface of the optical card I, and serve as a reference position for accessing the information tracks 4. A home position 3 is provided. This home position 3 may be virtual. The information tracks 4 are arranged as 4-0, 4-1, . . . 4-n in order from the one closest to the home position 3. Tracking tracks 5-0, 5-1, -5-(n
+1) is provided.

At the beginning of information track 4, there is a physical track number 7 in advance.
is preformatted. The track numbers are arranged in the same way as the information track, and are arranged as 7-0, 7-1, and 7n in order from the one closest to home position 3.

Information track 4 records data (information file) and management information (directory) for managing the information file, and information files are stored in information tracks 4-0 to 4-.
In the n direction (arrow direction in FIG. 5), the directory is recorded from information track 4-n to 4-0 direction (opposite direction to arrow 1 in FIG. 5).

FIG. 6 shows how information is recorded on the optical card l as described above, and
1 is a block diagram showing a schematic configuration of an information recording and reproducing device for reproducing information recorded on the optical card. FIG.

In FIG. 6, reference numeral 19 indicates a recording/reproducing device, to which is connected a host control device CP T, J 50. In the recording and reproducing apparatus 19, 14 is a guide for introducing the optical card I into the recording and reproducing apparatus via a transport mechanism (not shown), moving it back and forth in the R direction at a predetermined recording and reproducing position, and ejecting it from the apparatus. It is Tanabata.

Reference numeral 17 denotes a light beam irradiation optical system including a light source, which forms a light spot on the optical card 1 during information recording and reproduction. In this embodiment, three light spots are formed on the optical card 1. 22 to 24 are photodetectors;
” It is possible to receive the reflected light of the three light spots on the two-dimensional card 1, respectively.

]5 drives a part of the light beam irradiation optical system 17 to move the focal position of the light spot on the light cart surface 1- in the Z direction, that is,
It is an AF actuator for performing AF by moving in the direction perpendicular to the optical card surface, and 16 is an optical beam irradiation system optical 1.
This is an AT actuator for performing AT by driving a part of the optical card 7 to move a light spot on the optical card surface in the Y direction, that is, in a direction orthogonal to both the R direction and the Z direction.

The light beam irradiation optical system 17, photodetectors 22 to 24, A
, an F actuator 15, and an AT actuator 16, an optical head 18 is configured. Reference numeral 13 denotes a drive motor for moving the optical head in the Y direction to access the optical spot to a desired track on the optical card.

The drive motors 13 and 14 are micro-blocks (+)
(MPU) Controlled by No. 71 is drive motor I
4, and outputs a pulse every time the drive motor 14 rotates by a predetermined angle. Since there is a certain relationship between the rotation angle of the drive motor and the amount of movement of the optical card in the R''j three directions, by counting the output pulses of the encoder 71, the position of the optical spot of the optical card ten in the R direction is detected. A waveform shaping circuit 72 shapes the output pulses of the encoder 71 into a form that can be received by the Mi P U I O.

The outputs of the photodetectors 22 to 24 are input to the control circuit 11, and based on this, the control circuit controls the AF actuator 15 and the AT actuator 16 to perform AF and A
Do T. The outputs of the photodetectors 22 to 24 are also input to the modulation/demodulation circuit 12 to demodulate the read information, and the demodulated signals are sent to MPU10. Further, the modulation/demodulation circuit 12 modulates the information signal sent from the MPU10, and drives the light beam irradiation optical system 17 according to the modulation signal to record information. Above MPU10
is controlled by the CPU 5O and exchanges data with the CPU 50.

7 is a perspective view showing details of the optical head portion of FIG. 6. FIG. In FIG. 7, 27 is a semiconductor laser as a light source;
8 is a collimator lens, 29 is a light beam shaping prism,
30 is a diffraction grating for splitting the beam, 20 is a beam splitter, 25 is a reflecting prism, 26 is an objective lens, 21 is an astigmatism focusing lens system, and 22 to 24 are the photodetectors.

The light beam emitted from the semiconductor laser 27 becomes a diverging light beam and enters the collimator lens 28, and is converted into a parallel light beam by the lens. The parallel light beam is shaped into a predetermined light intensity distribution by the light beam shaping prism 29, and then enters the diffraction grating 30, where the diffraction grating forms three effective light beams (0th-order diffracted light and ±1st-order diffracted light). divided into These three light beams enter the beam splitter 20, pass straight through, are reflected by the reflection prism 25, and enter the objective lens 26. Then, the objective lens 26 focuses the optical card 1" to 3".
Two minute light spots Sl (corresponding to +1st order diffracted light)
, 52 (corresponding to the 0th-order diffracted light), and 53 (corresponding to the -1st-order diffracted light). The light spots S1 and S3 are located on adjacent tracking tracks 5, and the light spots S1 and S3 are located on adjacent tracking tracks 5.
2 is located on the information track 4 between the tracking tracks.

The reflected light from the light spot formed on the optical card passes through the objective lens 26 and is made almost parallel to the reflective prism 2.
5, further reflected by the beam splitter 20, condensed by the condensing lens system 21, and sent to the photodetector 2.
2 to 24.

FIG. 8 is a diagram showing the configuration of the photodetectors 22-24. The photodetector 23 is a four-part photodetector.Next, an embodiment of the information recording method of the present invention will be described. First, the initial operation will be explained.

When the optical card 1 is inserted into the information recording/reproducing device 19, it is sent in the direction of arrow (■)7 in FIG.
, F are applied, the light spot is temporarily moved above the home position 3. After that, AT is applied by accessing the information track 4-n, and the directory information already recorded in the direction of the information track 4-0 is read, and the MPU1
Store in RAM in 0.

At this time, the physical track number of the information track where the last directory information was recorded is also stored. after that,
Return the light spot to home position 3.

FIG. 9 is a diagram showing the directory format adopted in this embodiment. In Figure 9, FN is the name of the information file managed by the directory, ST
is the type of sector that the information file records (
(described later), SPT, EPTSSLT.

ELT and SN are the first physical track number, the last physical track number, and the last physical track number on which the information file is recorded, respectively.
These are the first logical track number, the last logical track number, and the sector number, FS is the information capacity of the information file managed by the directory, and M is the file number. Logical track numbers are different from pre-formatted physical track numbers; they are numbers that are consecutively assigned only to tracks that have been successfully recorded; if recording has not been done correctly, the same number will be recorded on the next track. be done.

The file number M is a consecutive number given to the files managed by the directory.

In this embodiment, when one track is not divided into sectors,
Four types of sector sizes are selectable, including (1 sector/track). The sector types are shown below.

Note that the present invention is not limited to the following sector types. What is shown below is only one example adopted in this embodiment. The type numbers O to 3 shown below are recorded in the ST. 1, Type 0...51.2 Kbytes/sector, 1 sector 5. /Track type: 256 bytes/sector, 2 sectors/track type 2...128 bytes/sector, 4 sectors, 2
/Track type 3...64 bytes/sector, 8 sectors/track Sector numbers are given from 0 to a maximum of 7 (depending on the sector type) from the one closest to the physical track number to the one farthest from the physical track number. In addition to the information shown here, information such as the date and time when the file was created may be recorded. Among the read directory information, file name FN
and the file information capacity FS are transferred to the CPU 50.

FIG. 1 is a flow chart for explaining one embodiment of the information recording method of the present invention. Next, each operation will be explained with reference to FIG.

The CPU 50 provides the MPU10 with a recording command signal and the capacity of information to be recorded. MPU 1
In step 101, O determines whether the amount of information to be recorded from now on is larger or smaller than half of the capacity of one track (512 bytes in this embodiment). If there is less, the process proceeds to step 102; if there is more, the process proceeds to step 103. In step 102, a seek is made to the first track of unrecorded information tracks, that is, a track where recording is to be started, and AT is applied. Next, in step 104, the drive motor 14
is driven to move the optical card in the direction of the arrow in FIG. 6, read track number 7, and if it is the target track, record one track's worth of information. At this time, the information to be recorded is CP
When the information capacity to be recorded is less than the information capacity of one track, the insufficient amount is filled with dummy information. Further, this information is recorded on the optical card and also stored in the RAM of MPU10. Furthermore, in the information actually recorded on the optical card, an FCC is added to the data sent from the MPU 50, and a logical track number LT is added to the beginning of the recorded information.
and file number M are added. If the sought track is not the target track, the seek is retried in step 102. (This process is not shown in Figure 1).

After one track has been recorded, verification is performed in step 105 to see if the recording has been performed correctly. After recording one track, the light spot is located at the end opposite to track number 7 of information track 4 in FIG. 1 to drive the optical card 1 in the direction of arrow F, and read out the information in the opposite direction to the direction in which it was recorded, M P L+
The information is compared with the information already stored in the RAM of No. 10. In step 106, if the verification result is correct, step 1.0
The process proceeds to step 7, and if not correct, the process proceeds to step 108. In step 107, it is determined whether there is any further information to be recorded.

,: Starting from CPU 50! This is determined by comparing the selected information volume I to be recorded with the information volume that has already been recorded since the start of recording. If there is still information to be recorded, the process advances to step 108 and the light spot is moved to the next track. After that, the process returns to step 1.04, but the information recorded in step 104 (A) varies depending on the step executed immediately before step 108. If that step is the first step executed in step 107, there is still more information to be recorded. Since the situation is such that the next information to be recorded is requested from CI" U 50, it is recorded. - Force,
When the immediately previous step is step 106, it means that the data recorded immediately before could not be recorded, so the information stored in the RAM of the MPU 10 is re-recorded.

As described above, steps 104 to 108 are repeated as many times as necessary depending on the situation, and when all information has been correctly recorded, step 1.09 is reached.

031: "If the information capacity of recording 1 is less than half of the information capacity of one track, the final recording track, i.e. the body A seek is made to the track last recorded in the recording operation performed immediately before starting the recording operation.Next, in step 110, a sector size is selected.

FIG. 2 is a flowchart 1 for selecting the sector size in step 110. In FIG. 2, FS indicates the amount of information to be recorded. It is clear that type 0 is never selected in step 11.033, that is, type 0 can only be selected when step 102 is reached in step 1.01. Therefore, in step 110, one of the types 1 to 3 is selected.

In step 201, the information capacity FS to be recorded is compared with 128 bytes, and if larger, type 1 is selected in step 202, and 256 bytes/sector is selected. ,
- If the power is smaller than 128 bytes, the process proceeds to step 203, where the information capacity FS to be recorded is compared with 64 bytes. If it is larger, type 2 is selected in step 204, and if smaller, type 3 is selected in step 205.

In this step 110, as a result, the smallest sector size that is sufficient to record the information capacity to be recorded is selected among the selectable sector sizes, and the information to be recorded is recorded in one sector. become.

Returning to FIG. 1, in step 111, step 110
It is determined whether the selected sector size is the same as the final recording track. This embodiment allows a plurality of sectors to be arranged on one information track, but does not allow sectors with different sector sizes to be mixed. In addition, as mentioned above, the sector size ST when each information file is recorded is recorded in the directory that manages that file, so the MPU
The sector size of the final recording track can be known from the directory information stored in the RAM of l0. If they are the same, proceed to step 121; if they are different, proceed to step 1.
Proceed to step 13.

In step 112, it is determined whether there is any empty space in the final recording track for additional information. As mentioned above, the sector size ST in which the information file is recorded
and sector number SN are recorded in the directory information, and if you know the sector size ST, you can know the number of sectors that can be recorded on one track. By comparing the SNs in the information, it can be determined whether there is empty space on the last track. As a result of the judgment, if there is an empty space, proceed to step 114,
If there is none, the process advances to step 113.

In step 113, the light spot is moved to the next track. If this step is executed, step 11.
This is when the sector size of the final recording track and the selected sector size are different, or when the sector size is the same but there is no empty space, and in either case, it is not possible to record on the final recording track. . Therefore, the light spot is moved to the next track.

In step 114, one sector's worth of information, that is, all the information to be recorded is recorded at once. Similarly to step 104, the drive motor 14 is driven to drive the optical card in the direction of the arrow, the track number is read, and if it is correct, recording is performed. At this time, when recording to the first sector (sector O), recording starts immediately after reading the track number, but if the sector to be recorded is other than sector 0, it is skipped to the desired sector position. , the position of the current L1 optical spot for recording in a desired sector in the track direction can be determined by using the output pulses of the waveform shaping circuit 72 as a reference, based on the position where physical track number 7 has been read.
It can be known by counting lO. That is, once the sector size is determined, the physical position of each sector on the information track is determined, so MPU10 counts the output pulses of the waveform shaping circuit 72 to indicate that the optical spot has reached the desired sector position. Detect and start recording.

When the recording is completed, verification is performed in step 11.5. In this embodiment, the data is not reversed and verified immediately after one sector recording is completed. this is,
This is to simplify control by setting the reversal positions only to both ends of the information track. However, there is no problem with the present invention even if the direction is immediately reversed in the middle of a track after recording one sector. Therefore, in this embodiment, as in step 105, the drive motor 14 is driven in the opposite direction to that during recording to drive the optical card in the direction of arrow F to perform verification. The process of skipping to a desired sector is similar to step 114.

At step 116, it is determined whether the verification result is correct or not. If it is correct, the process proceeds to step 109; if it is incorrect, the process returns to step 112; and if there is an empty space on the same track, re-recording is performed at step 114. If there is no empty space in step 112, the optical spot is moved to the next track in step 113, and re-recording is performed in step 114.

As explained above, if steps 112 to 116 can be repeated and recorded correctly as many times as necessary depending on the situation, step 10
Reach 9.

Step 109 is the recording of the directory. FIG. 3 shows a flowchart when recording a directory. In this embodiment, a type 3 sector size is used when recording a directory. Therefore, the flow during recording is almost the same as that for sector types 1 to 3 shown on the right side of FIG.

In step 30I, the information track having the physical track number of the last directory record stored in the RAM of MPU10 in the initial operation is accessed. Next, in step 302, it is determined whether there is any empty space on that track to record another directory, but the operation at this time is different from step 112 in FIG. determine whether there is. this is,
This is because the information recording device of this embodiment does not have information about where and how the directory information is recorded.

After that, in steps 303 to 306, step 1 in FIG.
Perform operations similar to steps 13 to 116 to complete recording of the correct directory. That is, if there is a free space in step 302, the process directly proceeds to step 304; if there is no free space, the light spot is moved to the next track in step 303, and then the process proceeds to step 304. In step 304, the optical card is driven in the direction of the arrow to record the directory. Next, step 30
At step 5, the optical card is driven in the direction of arrow F to perform verification. Then, in step 306, if the verification result is correct, the process proceeds to step 307, and if there is a recording error, the process returns to step 302 and the verification is recorded again.

In this embodiment, as described above, the directory information is stored in the RAM of MPU10 in the initial operation after the optical card is inserted, and the information is not recorded or reproduced until the card is ejected and a new card is inserted. At times, the directory information recorded on the optical card is not reproduced. Therefore, when recording new information on an optical card, the same information is stored in MP C,... + 10 RAM.
also need to be memorized. This is done in step 3()7.

With this, the recording operation ends.

FIG. 4 is a flowchart when the information recorded by the method of the present invention is automatically generated. Next, the reproducing operation will be explained with reference to FIG.

When a reproduction command is given from the CPU 50, the MPU
1.0 is step 401, based on the file name FN to be played that is given at the same time, the R stored at the initial operation is
Search for information on the B-REF on AM. Then, information such as the first physical track number SPT, the first logical track number SLT, the sector size ST, and the sector number SN in which the file to be played is recorded is known, and step 4
02 to seek to the desired first track. Next, in step 403, it is determined whether the sector size is type 0. If the sector size is type O, the process proceeds to step 404; if not, the process proceeds to step 405.

If the sector is type 0, the sura “tub 404”
reads the first information track at step 406, and at step 406 E C
Check C, and in step 407, it is determined whether or not the data has been successfully reproduced.If the data has been reproduced correctly, in step 408, the remaining data to be reproduced is -1.
3. Since the file capacity FS to be generated is known from the directory information, it can be determined by comparing the information capacity played so far with the file capacity FS 1. Step 408 If there is still data remaining, or if the playback was not performed correctly in step 407, access the next track in step 409, and repeat steps 404 to 409 as many times as necessary depending on the situation to ensure that all information is Play correctly.

However, although not shown in the flowchart in Figure 4,
If the next track was not played correctly in step 407 and the logical track number was not the same as the previous logical track number, then in step 40
8, there was still data to be played, so I played the next track, and if the logical track number was not consecutive to the previous logical track number, it was an error, and the MPU
l0 informs the CPU 50 of the problem. .

On the other hand, if the process proceeds to step 405 in step 403, the target sector is reproduced in step 405. At this time, as with verification, data is skipped until the target sector is reached. Then, in step 410, an ECC check is performed,
In step 411, it is determined whether the riverbed has been correctly reproduced. When the file can be played back correctly, in the present invention, if the track is divided into sectors, one file is always recorded in one sector, and there is no information left to play after that. Therefore, the playback operation ends. If the data is not reproduced correctly in step 411, the process advances to step 412 to determine whether there are any more sectors on the same track. This can be determined from the sector number SN and sector size ST to be reproduced. If there are more sectors, the process returns to step 405 and plays the next sector; if there are no more sectors, the next track is accessed in step 413, and the first sector of the next track is played in step 405. As described above, steps 405 to 413 are repeated a necessary number of times depending on the situation, and when the data is correctly reproduced, the reproduction operation ends.

However, although not shown in the flowchart in Figure 4,
Since it was not played correctly in step 411, when the next sector was played back, if the file number was not the same as the previous file number, it was an error and MPUl0 was
Tell PU50 that.

The present invention has been described above based on examples.

In this embodiment, the recording medium was an optical card, but it goes without saying that the present invention can also be applied to a write-once optical disc. Further, in this embodiment, a medium on which physical track numbers are preformatted is used, but physical track numbers are not essential to the present invention. Further, in this embodiment, each track and sector is reproduced only once and no retry is performed, but a retry may be performed if an error occurs.

〔Effect of the invention〕

As explained above, the information recording method of the present invention changes the sector size according to the amount of information in the information film to be recorded, which makes the recording capacity of the medium more effective. How to use it. , j, and l tracks are divided into two parts and used, one file is always recorded in one sector, and there is no need to divide and record it into multiple sectors. Further, the verinoisle is performed in units of one sector (one no'ile), so that there is no wasted operation or wasted time in the device. Therefore, compared to the conventional information recording method in which one file is divided into a plurality of sectors, the throughput is more uniform. Furthermore, if there is a redundancy operation (5-), it is recorded in ruby in the next sector, so there is no need for alternative management of the sector and information management can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a flowchart at the time of recording according to an embodiment of the present invention. FIG. 2 shows Roff + - Char 1 when sector size is selected according to the embodiment of the present invention. FIG. 3 is a flowchart -1 when recording a directory according to an embodiment of the present invention. Fig. 4 (This is a flow chart of the time flow A-- of the information recorded in 512. in the direction of Jkihatsu Qll.・
4. Outline not shown] , FIG. 6 is a block diagram showing a schematic configuration of an information recording intergeneration device used in the present invention. , FIG. 7 is a diagram showing details of the light/sut portion connected to the apparatus of FIG. 6. Figure 8 is a diagram showing the configuration of the photodetector included in the apparatus of Figure 6. Figure 9 shows an embodiment of the human invention. It is a diagram. 1...Light power -1゛4...Information track 5...Tracking track 7...Physical track number 18...Optical head LT...Logic track number edge...File number FS...・File capacity SN...Sector number

Claims (5)

[Claims] (1) In a method for recording a series of information on a recording medium having a plurality of tracks for recording information, whether or not the track is divided into a plurality of sectors depending on the amount of information of the series of information. and when it is determined to divide, a step of selecting a size that is sufficient to record the series of information and has the smallest information capacity from among a plurality of sector sizes with different information capacities. , based on the results of said judgment and selection,
comprising the steps of recording the information on an undivided track or sectors formed by dividing the track into selected sizes; and recording management information including information indicating the results of the judgment and selection on the medium. An information recording method characterized by: (2) In the judgment process, when the amount of information in the series of information is less than half of the information capacity of one track, it is judged to divide the track into a plurality of sectors. information recording method. (3) In the recording process, when information with the same sector size as the selected sector size has already been recorded on the track on which information is to be recorded, and there is a sector in which no information has been recorded yet on this track, , performs recording on the unrecorded sector of this track, and when information of a sector size different from the selected sector size is already recorded on the track on which information is to be recorded, no recording is performed on this track, Claim 1: Recording information from this track to another track closest to it
Information recording method described in section. (4) A patent for verifying the recorded information after recording information on the one track or one sector, and re-recording the information on the nearest unrecorded track or unrecorded sector if an error is detected. An information recording method according to claim 1. (5) The information recording method according to claim 1, wherein the recording medium is a card-shaped optical information recording medium.