JPH09180375A - Medium and device for recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy to judge which of user side and maker side is responsible for a trouble occurring to a recording medium in the case of trouble occurrence, by recording an original pattern on the recordable recording medium. SOLUTION: This recording device 1 has a 1st ROM 9 in which a specific certify pattern is recorded, a 2nd ROM 10 in which a specific original pattern is recorded, and a system controller 8 which controls the ROMs 9 and 10. And, an original pattern for discrimination which is different from the certify pattern and characteristic of the maker is recorded in the 2nd ROM 10 previously in the manufacturing process of the recordable recording medium. Consequently, if a trouble occurs, it can easily be judged which of the user and maker is responsible for the trouble by detecting how much the original pattern is left, i.e., the whole, part, or none of the original pattern being left.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape-shaped recording medium such as a cassette tape, a digital audio tape (DAT), a data cartridge, or a disk-shaped recording medium such as a floppy disk, a magneto-optical disk, a write-once disk. For a recording medium suitable for use in and a recording device for the recording medium, in particular, an identification pattern different from the certify pattern is previously recorded on the recording medium,
A recording medium and a recording device capable of easily determining whether the cause of the trouble is the maker side or the user side by detecting the remaining condition of the identification pattern when the trouble occurs in the recording medium. Regarding

[0002]

2. Description of the Related Art Today, as a recording medium for recording desired information, the recorded information can be easily rewritten, and the recorded information can be stored almost semipermanently. Recently, magneto-optical disks have been widely used instead of tape-shaped recording media.

All magneto-optical disks produced by the manufacturer are shipped after a final inspection process called "certify". In this certifying step, a predetermined certify pattern is recorded on the entire surface of the produced magneto-optical disc, and whether or not it is reproduced correctly is detected to determine whether the magneto-optical disc is a good product or a defective product. This is a process of determining whether there is any. Then, only magneto-optical discs that are determined to be non-defective products by this certifying process are shipped to the market. The shipped magneto-optical disk is purchased by a user through a retail store. Then, the user who purchases the magneto-optical disk normally formats the magneto-optical disk so as to be compatible with the disk drive owned by the user before starting recording of the desired data, and thereafter, the desired data is recorded. Make a record.

[0004] Here, if a user encounters any trouble while using the magneto-optical disk, the manufacturer is often liable for the trouble. In such a case, the manufacturer side investigates the remaining condition of the certify pattern of the magneto-optical disk used by the user, and based on the result of the investigation, it is determined whether the user side is responsible or the manufacturer side is responsible. Determine.

More specifically, if all the initially recorded certify patterns remain when the manufacturer detects the remaining condition of the certify pattern, this means that the user can use the magneto-optical disk at all. In addition to indicating that it could not be done, it also indicates that the magneto-optical disk at the time of shipment had an abnormality or the drive owned by the user had an abnormality. Therefore, when the user owns the drive and if there is no abnormality, the magneto-optical disk is defective from the beginning, and the manufacturer is responsible for the trouble. Also, if you check the drive owned by the user and there is a problem with the drive or if there is a problem in the usage status,
It can be seen that the magneto-optical disk has no problem and the user is responsible for the trouble.

Further, when the manufacturer detects the remaining condition of the above-mentioned certify pattern, if some certify patterns remain out of all the certify patterns initially recorded, this is the used recording area and the unused certifying pattern. Indicates that there is some abnormality on the boundary with the recording area, that an abnormality has occurred on the drive side during recording, or that there is a problem in the usage state of the user. Therefore, when the drive owned by the user and the usage state are investigated and there is no abnormality, it is understood that the magneto-optical disk is defective from the beginning and the manufacturer is responsible for the trouble. In addition, if the user owns a drive, and the drive is abnormal, or if there is a problem with the user's usage status, there is no problem with the magneto-optical disk, and the user is responsible for the trouble. I know there is.

Further, when the manufacturer side detects the remaining condition of the above-mentioned certify pattern and all the certify patterns recorded first do not remain, this means that the entire recording area has been used at least once. There is. Therefore, in this case, there is no problem in the magneto-optical disk purchased by the user, and the trouble caused by the usage state or the storage state occurs after the purchase.
Therefore, in this case, it is understood that the manufacturer has no responsibility and the user has responsibility.

When the responsibility is pursued by the user, the manufacturer investigates the remaining condition of the certify pattern in this way, determines the responsible party based on the result of this investigation, and pursues the cause of the trouble. Was doing.

[0009]

However, the format pattern written on the magneto-optical disk in the disk drive and the certify pattern written at the time of shipment of the disk in the certify step are often the same pattern. If the format pattern and the certify pattern are the same, whether the pattern is the certify pattern recorded on the maker side in the certifying step at the time of producing the disc, or the user recorded on the formatting side. It cannot be distinguished whether it is a format pattern. For this reason, the truly responsible side cannot determine whether it is the user side or the maker side, and in addition, it takes a lot of time to search for the cause of the trouble.

The present invention has been made in view of the above-mentioned problems, and it is possible to easily determine whether the manufacturer or the user is responsible for any trouble in the recording medium. The purpose of the present invention is to provide a recording medium and a recording device that can shorten the investigation time for pursuing the cause of trouble.

[0011]

The recording medium according to the present invention is, for example, a disk-shaped recording medium such as a magneto-optical disc, a write-once disc (write-once, phase change disc, etc.), a cassette tape, an 8 mm tape, a digital tape. · A writable recording medium such as a tape-shaped recording medium such as an audio tape or a data cartridge, and the entire recording area,
A part or a predetermined interval has a predetermined identification pattern different from the certify pattern.

Further, the recording apparatus according to the present invention includes a certification pattern generation means for generating a predetermined certification pattern, an identification pattern generation means for generating a predetermined identification pattern different from the certification pattern, and a recording medium. A recording means for recording the certification pattern and the identification pattern, a recording pattern for recording the certification pattern from the certification pattern generating means on the recording medium, and a recording area for the identification pattern from the identification pattern generating means. And a control means for controlling the recording means so as to record all or part of the recording medium or at a predetermined interval.

The identification pattern is an original pattern unique to the manufacturer, which is different from the normally used certify pattern. By recording this on a medium, if any trouble occurs during use of the recording medium, whether the cause of the trouble lies on the user side by detecting the remaining condition of the identification pattern on the manufacturer side,
Alternatively, it is possible to easily determine whether or not it is on the manufacturer side, and it is possible to shorten the time required for checking the cause of the trouble by checking.

Specifically, if all the initially recorded identification patterns remain when the manufacturer detects the remaining condition of the identification pattern, this allows the user to use the recording medium at all. In addition to indicating that there is no such error, it also indicates that the recording medium at the time of shipment had an abnormality, or that the drive owned by the user had an abnormality. Therefore, when the drive owned by the user is investigated and there is no abnormality, it is understood that the recording medium is defective from the beginning and the manufacturer is responsible for the trouble. Also, investigate the drives owned by the user,
If there is an abnormality in the drive or if there is a problem in the usage situation, there is no problem with the recording medium, and it is understood that the user is responsible for the trouble.

Further, when the manufacturer detects the remaining condition of the above-mentioned identification pattern, if some of the identification patterns initially recorded remain, this is the used recording area and the unused area. Indicates that there is some abnormality on the boundary with the recording area, that an abnormality has occurred on the drive side during recording, or that there is a problem in the usage state of the user. Therefore, when the drive owned by the user and the usage state are checked and there is no abnormality, it is understood that the recording medium is defective from the beginning and the manufacturer is responsible for the trouble. In addition, if the user owns a drive and investigates it, or if there is a problem with the drive or if there is a problem with the usage status of the user, there is no problem with the recording medium and the user is responsible for the trouble. I understand.

Further, when the manufacturer detects the remaining condition of the above-mentioned identification pattern, if all the identification patterns initially recorded do not remain, this means that the entire recording area has been used at least once. There is. For this reason, in this case, there is no problem when the user purchases the recording medium, and after the purchase, a cause of trouble due to the use state or the storage state has occurred. Therefore, in this case, it is understood that the manufacturer has no responsibility and the user has responsibility.

As described above, in the recording medium, the cause of trouble is on the user side or on the maker side by previously recording the manufacturer's unique identification pattern different from the certify pattern on the recording medium. It is possible to easily discriminate whether or not. Therefore, the time required to investigate the cause of the trouble can be shortened.

Incidentally, The recording medium can be applied to, for example, a nonvolatile semiconductor memory (for example, SRAM: static RAM or the like) as long as it can record information, and the same can be applied to the recording device of the present invention. Of course.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of a recording medium and a recording apparatus according to the present invention will be described in detail with reference to the drawings. First, the recording apparatus according to the present invention is
It can be applied to the magneto-optical disk recording / reproducing apparatus 1 as shown in FIG. This magneto-optical disk recording / reproducing apparatus 1
Is mainly used by the maker side, and in the certifying step which is the final step of the manufacturing step of the magneto-optical disk 2, is it possible to record the certify pattern on the manufactured magneto-optical disk 2 and reproduce it correctly? By detecting whether or not the magneto-optical disk 2 is a good product or a defective product.

Specifically, the magneto-optical disc recording / reproducing apparatus 1 has a spindle motor 3 for rotating a turntable on which a magneto-optical disc 2 is mounted at a constant angular velocity (CAV) as shown in FIG. And an optical pickup 4 which irradiates the magneto-optical disk 2 with a laser beam of each intensity for recording or reproduction and receives the returned light to form a light amount detection signal. In addition, an amplifier circuit (amplifier) 5 for amplifying the light amount detection signal from the optical pickup 4 with a predetermined gain, and a magneto-optical signal (MO signal) based on the light amount detection signal from the amplifier 5 are detected. A signal processing system 6 that performs a predetermined signal processing on the MO signal and outputs the signal, and forms servo signals such as a tracking error signal, a focus error signal, and a rotation error signal based on the light amount detection signal from the amplifier 5, A servo control system 7 for performing tracking control and focus control of the optical pickup 4 and rotation control of the spindle motor 3 based on these is provided. Further, the first ROM 9 in which a predetermined certify pattern is recorded, the second ROM 10 in which a predetermined original pattern is recorded, and the read and control of the certify pattern and the original pattern from the first and second ROMs are controlled. It has a system controller 8 and a SCSI interface 11 for connecting the magneto-optical disk recording / reproducing apparatus 1 to a host computer.
In addition, the EFM is applied to the certify pattern and the original pattern read from the ROMs 9 and 10.
EFM processing circuit 12 for performing processing (8-14 modulation processing)
A magnetic head 14 for applying a magnetic field according to the modulated certify pattern and the original pattern to the magneto-optical disk 2;
The magnetic head driver 13 is driven by each modulation pattern from the FM processing circuit 12 (magnetic field modulation drive).

Such a magneto-optical disk recording / reproducing apparatus 1
In practice, as shown in FIG. 2, a plurality of certifying drives are connected to form a certifying drive 20. The certifying drive 20 is connected to the host computer 21 via the SCSI interface 11.
A certifying system for magneto-optical disks used mainly by manufacturers is constructed.

Here, the magneto-optical disk 2 to be certified by such a certification system has servo patterns for servo control in the form of pre-pits at predetermined intervals with respect to the spirally provided recording tracks. It is a sample servo type magneto-optical disk provided. As shown in FIG. 4, the magneto-optical disk 2 is divided into segments (segment 0 to segment 1399) having a track length of 1400. Each segment is classified into an address segment ASEG and a data segment DSEG.

On each track of the address segment ASEG, a track number, which is position information in the radial direction on the disc, and a segment number, which is position information in the tangential direction, are recorded by prepits. This address segment ASEG is shown in FIG.
As shown in FIG. 1, it is provided every 14 segments, and 100 pieces are provided per track. Further, one frame from one address segment ASEG to the next address segment ASEG is one frame. Therefore, one round of the track is composed of 100 frames.

The data segment DSEG exists between two consecutive address segments ASEG.
Each of the three segments. This data segment DS
The EG is provided in 1300 segments per revolution. Each segment has a servo area A for 24 servo clocks.
Rs and data area ARd for 192 servo clocks
And a recording area for a total of 216 servo clocks. The address segment ASE
In G, the data area ARd is the address area ARd.
a and a laser control area ARdb.

In the servo area ARs, as shown in FIGS. 5A to 5E, three pits Pa, Pb, Pc each having a length of 2 servo clocks and a focus sample area ARfs having a length of 6 clocks are provided. Is provided. The pits Pa 1, Pb 2, Pc are provided such that the distances from the center of the pit Pa to the center of the pit Pb and from the center of the pit Pb to the center of the pit Pc are 5 servo clocks. ing.

As described above, each pit Pa, Pb, Pc in the servo area ARs has a length corresponding to two servo clocks, so that the portion where no pit is formed (mirror portion) can be reduced, and the disc can be reduced. It is possible to prevent the generation of ghost pits and the like during molding. Further, since it is possible to reproduce a stable RF signal based on the pits Pb and Pc at the time of access, it is possible to form various servo signals such as a stable tracking servo signal and focus servo signal.
Further, since the centers of the pits Pa, Pb, Pc are separated by a predetermined distance or more, the pits Pa, P
Data interference between RF signals reproduced from b and Pc can be made extremely small. In order to reduce the data interference between the pits, it is desirable that the intervals between the pits Pa, Pb, and Pc be separated by 5 servo clocks or more.

Next, the second pit Pb located in the 11 to 12 clock period and the third pit Pc located in the 16 to 17 clock period are respectively ± 1/4 track pitch from the center of the track in the radial direction of the disk. These wobble pits are provided at positions shifted by a distance, and as will be described later with reference to FIG. 30, the tracking error is detected by the difference between the amplitude values of the RF signals reproduced from these pits Pb and Pc. ing. Also, these pits P
The phase information of the servo clock is detected from the difference between the amplitude values of both shoulders of the RF signal reproduced from b and Pc.
By adding the phase information, the phase information of the clock that does not depend on the tracking state is detected.

Further, the first pit Pa at the beginning of the servo area ARs shows the attribute of the segment depending on its recording position. Specifically, when the first pit Pa is recorded so as to be located in the 3 to 4 clock period as shown in FIG. 5C, the first pit Pa is the address mark ADM and its segment is The address segment ASEG is indicated. Further, when the first pit Pa is recorded so as to be positioned in the 4 to 5 clock period as shown in FIG. 5D, the first pit Pa is the first sector mark STM1 and its segment is It indicates that it is the first segment of a sector. Further, when the first pit Pa is recorded so as to be located in the 5-6 clock period as shown in FIG. 5E, the first pit Pa is the second sector mark STM2, and the next segment Indicates that it is the first segment of the sector. Further, when the first pit Pa is recorded at a recording position other than the above-mentioned recording positions, the first pit Pa is a segment mark SGM.

The information indicated by the first pit Pa is the maximum difference value detection, as shown in FIG. 6, for example.
Using the so-called differential detection method,
Identification is performed by detecting the position of the maximum amplitude value of the reproduced RF signal.

In this way, the address mark ADM, the first sector mark STM1 and the second sector mark STM2 are indicated by the recording position of the first pit Pa recorded at the head of the servo area ARs. It is not necessary to record the sector number or track address for each sector, and the recording capacity of the magneto-optical disk 2 can be improved accordingly.

Next, in the address segment ASEG, as shown in FIG. 7, 16-bit track addresses [AM], [A] are provided as position information in the radial direction of the disk.
2], [A3], [AL] and their parity data [P]
And the access code ACC, and the frame address [F] as position information in the tangential direction.
Frame codes FRC composed of M] and [FL] are gray-coded and recorded in the form of prepits.

In the access code ACC, a total of 16-bit track address is divided into 4 bits, and AM = 15-1 based on the gray code table shown in FIG.
2 bits (MSN), A2 = 11 to 8 bits (2S
N), A3 = 7 to 4 bits (3SN), and AL = 3 to 0 bits (LSN) in the order of table conversion and recorded. At this time, only when the least significant bit of the 4 bits is "1", a value obtained by taking the 1's complement of the next 4 bits is used. As a result, these access codes are recorded so that only one pattern changes between adjacent tracks as shown in FIG. The parity code is divided into groups according to the bit position of the access code, and each group [15, 11, 7, 3], [14, 1
0, 6, 2], [13, 9, 5, 1], [12, 8,
4, 0], the result of taking the parity that becomes “1” when the bit of the value of “1” is an even number is recorded.

As described above, in the magneto-optical disk 2, only when the least significant bit of the 4 bits is "1", the value is obtained by complementing the next 4 bits with 1 and between adjacent tracks. These access codes are designed to change only one pattern. Therefore, when the pit representing the gray code of the upper 2 bits and the pit representing the gray code of the lower 2 bits are "0" in the shortest distance,
Also, in the case of "F" in which one is at the shortest distance and the other is at the longest distance, a pit can be formed in the central area for the one clock, and the central area is in the radial direction. It is possible to prevent the inconvenience of becoming a continuous mirror section. Therefore, since the mirror portion can be minimized, the storage capacity of the disk can be improved, and at the same time, the resin flow can be made uniform at the time of molding the disk to enable high quality molding of the disk.

Next, the frame code FRC divides an 8-bit frame address representing the frame number, which is information in the tangential direction of the address segment ASEG, into upper and lower 4-bits, and the upper 4-bit FM.
= 7 to 4 bits (MSN) and lower 4 bits LM = 3 to 0
It is formed and recorded by gray-coding the bit (LSN) in the same manner as the above access code. Since the frame code FRC is recorded with 8 bits, information of 0 to 256 can be recorded. However, since the number of address segments ASEG in the magneto-optical disk 2 is 99, the frame code FRC is It will be recorded using values from 0 to 99.

Next, the focus sample area ARfs of the servo area ARs is a mirror portion, and focus servo and read power APC (Automatic Powe
r Control), RF signal clamping, etc. It is difficult to accurately specify the positions of various sample pulses for these processes, and fluctuations of ± 0.5 servo clock pitch or less are expected. Therefore, even if such a variation occurs, the focus sample area ARfs is not affected by the level variation of the reproduced RF signal and the sampling is performed at an accurate value in order to ensure the sampling.
Is a mirror unit for 6 clocks.

Next, as shown in FIG. 9, the data area ARd of the data segment DSEG includes a data area ARd for 176 to 368 data clocks for recording user data and a prewrite area A for 12 data clocks.
R _PR and post write area AR for 4 data clocks
It consists of _PO and.

As will be described later, the recording area of the magneto-optical disc 2 is divided into a total of 16 zones from zone 0 to zone 15 along the radial direction of the disc, and the phase is divided according to the position of each zone. Data is recorded / reproduced at a constant angular velocity based on the controlled data clock.
So-called zone CAV recording / playback is performed. Therefore, since the phase of the data clock changes according to each zone, the number of data clocks also changes according to each zone.

The above-mentioned pre-write area AR _PR is the above M
The O drive 56 to 60 secures a distance required for preheating from the start of irradiation of the laser beam to the temperature of the disk suitable for data recording, and DC fluctuation due to birefringence of MO signal during reproduction. This is a region used as a clamp area for suppressing The post-write area _ARPO is an area provided to prevent unerased data when overwriting and to secure a distance that can prevent data interference caused by the edge of the groove Gr.

Even if the magneto-optical disk 2 is a so-called hybrid disk having a read-only area (ROM area) in a part of the entire area in order to ensure format compatibility, the pre-write is performed in the ROM area. Area AR _PR is provided.

Next, in a recordable optical disc such as the magneto-optical disc 2, since no pits are formed in the data recording area, it is better to use a mirror portion than a read-only optical disc in which all data is recorded as pre-pits. Area tends to be large. Therefore, as shown in FIG. 9, the magneto-optical disk 2 is provided with a groove Gr having a depth of λ / 8 where the wavelength of the laser beam is λ, in a portion corresponding to the data area ARd. As a result, the number of mirror portions can be reduced as a whole, and the adverse effect on the servo pits during disk molding can be reduced. Since the groove Gr is not used for tracking control, accuracy such as its depth is not required.

When the magneto-optical disc 2 is a hybrid disc having a read-only area, the above-mentioned FIG.
The groove Gr shown in FIG.
As shown in, an anchor pit Pan for 3 data clocks is recorded at the beginning of the data area ARd. As a result, even when the magneto-optical disk 2 is a hybrid disk, the number of mirror portions can be reduced as a whole, and adverse effects on servo pits during disk molding can be reduced.

Next, one data sector is shown in FIG. 11 and FIG.
66 bytes of reference data and 2
048 bytes of user data (D0 to D2047),
256-byte ECC (E1,1 to E16,16),
24 bytes of 8-byte CRC (CRC1 to CRC8) and 40-byte user defined data (UD)
It consists of 18 bytes. Note that FIG. 12 shows the above 6
A data format of 2352 bytes excluding 6-byte reference data is shown.

As the reference data, an 8T pattern of 4 bytes and a 2T of 12 bytes are obtained so that an RF signal having a waveform as shown in FIG. 13 can be obtained during reproduction.
A total of 4 blocks of reference patterns that form one block of patterns and a 66-byte specific pattern that is provided as a margin for setting the detected information and that is composed of 2-byte all 0 patterns are recorded. It is supposed to be done.

The 8T pattern is used for setting a ternary level (high H, medium M, low L) in data detection by partial response (1, 1) and Viterbi decoding, and the 2T pattern is caused by recording power fluctuation or the like. It is used when correcting a DC-like shift in the pit position during reproduction. In addition, the data area AR of the data segment DSEG
In d, data other than the reference data is scrambled and NRZI converted and recorded for each segment.

Next, the magneto-optical disk 2 is a so-called zone CAV disk, and as shown in FIGS. 14 and 15, GCP (Gra) for 736 tracks from the outer peripheral side.
yCode Part) area, 2 tracks of buffer tracks, 5 tracks of control tracks, 2
Buffer track for 5 tracks, test track for 5 tracks, user zone 0, 864 for 848 tracks
User zone 1 for tracks, user zone 2 for 880 tracks, user zone 3 for 912 tracks 3, 94
User zone 4 for 4 tracks, user zone 5 for 976 tracks, user zone 6 for 1024 tracks,
User zone 7 for 1056 tracks, user zone 8 for 1120 tracks, user zone 9 for 1184 tracks, user zone 10 for 1216 tracks
96-track user zone 11, 1392-track user zone 12, 1488 track-user zone 13, 1696-track user zone 14, 7
A user zone 15 for 70 tracks, a test track for 5 tracks, a buffer track for 2 tracks, a control track for 5 tracks, a buffer track for 2 tracks, a buffer track for 2 tracks, and a GCP area for 820 tracks.

Here, the number of tracks in a zone is Tz, the number of data segments required for one sector in a certain zone is Dsz, and the number of data segments per track is Dt, and a sector is completed for each zone. In addition, in order to keep the number of sectors constant, the number of sectors Sz in the zone is Sz = Tz · Dt / Dsz, and Tz = K ·
The number of tracks may be determined so that it becomes Dsz. Then, the number of sectors Sz determined by using a value of K that is close to the data capacity per zone obtained by dividing the data capacity of the entire disk by the total number of zones is assigned from the outer peripheral side zone, All parameters can be obtained by determining the data clock frequency so that the recording density of the innermost track does not exceed a predetermined recording density. The capacity of one sector is 235, for example.
It is constant at 2 bytes.

In this case, as shown in FIG. 16, when a sector starts from a certain segment and the number of segments constituting one sector ends, the sector ends. Even if there are extra bytes in the last segment, the next sector is not started from the extra bytes, but the next sector is newly started from the next segment. As a result, at the beginning of the zone, a sector that always starts from segment 0 of the 0 frame code can be configured. When a parity sector is provided for a certain number of sectors, the number of sectors in each zone can be made uniform and the capacity of the parity sector can be made constant.

Note that the innermost zone may not have the same number of sectors as the other zones due to the relationship with the recording area, but the track at which the sector ends in segment 1399 is the innermost zone. It is supposed to do.

Next, in such a magneto-optical disk 2, "M" is set to the clock value shown in FIG. 14 and "N".
24, the number of data bytes in one segment (byte / seg) and the number of segments per sector (seg / sector) are determined by the data clock DCK formed by multiplying the servo clock SCK by M / N. .

That is, assuming that the number of servo clocks in the servo area ARs is N and the data clock DCK is M / N times the servo clock SCK, the number of servo clocks SCKseg and the number of data clocks DC in one segment.
Kseg is SCKseg = 9N DCKseg = SCKsegM / N. Note that N and M are integers.

Next, as described above, one track is 1400
It is divided into segments, of which 1300 are data segments DSEG, but no user data is recorded in the GCP area. Therefore, 13
Of the 00 data segments DSEG, 100 segments are used as GCP segments GCPseg for recording GCP information such as media information.

The GCP segment GCPseg is assigned to the data segment at the intermediate position of each address segment ASEG as shown in FIG.
Servo area ARs and GCP area AR as shown in
It is composed of gcp and blank ARblk.

In the GCP area ARgcp, seven 4-bit data gray-coded by the same method as the access code ACC of the address segment ASEG is recorded.

Specifically, the above GCP area ARgcp
Includes [GCPH], [GCP2], [GCP3],
G consisting of [GCPL] and its parity data [P]
The CP code and page numbers [PNH] and [PNL] are recorded in pre-pits, respectively. GCP above
Parity data [P] is added to the code to enable error detection. Also, page number [PN
H] and [PNL] are added, and a plurality of media information and the like can be provided as GCP information. Also,
When recording page numbers [PNH] and [PNL] up to 16 pages, the page numbers [PNH] and [PN] are recorded.
L], by recording the same information,
Can be more robust to errors.

In addition, in the GCP area ARgcp,
As shown in FIG. 19, each GCP segment GCPseg is arranged in a state in which the last digit of the address (frame number) recorded in the address segment ASEG matches the page number of the GCP segment GCPseg. . As a result, the address segment ASE
Misreading of the G frame number and the page number of the GCP segment GCPseg can be prevented. In addition, since one track is composed of 100 frames, 10 pages, that is, 10 kinds of GCP information are recorded as 1
By recording 0 times repeatedly, 10 kinds of G each
Misreading of CP information can be greatly reduced.

Next, the GCP segment GCPseg
GCP information of page number 0 of the GCP information recorded in
The information is information indicating media information / media type as shown in FIG. 20, and bits 15 to 14 provide information indicating the physical format of the medium such as the presence or absence of a groove or the presence or absence of a sector mark. Bit 4, MO, R
Provides information indicating the format of media such as OM, bit 3
~ Bit 0 provides media generation information.

The GCP information of page number 1 is shown in FIG.
1 is information indicating a data information / error correction format as shown in FIG.
Information indicating that it is logical CAV, NRZI coding, etc. is provided, and information indicating an error correction format is provided from bit 7 to bit 0.

The GCP information of page number 2 is shown in FIG.
As shown in 2, it is information indicating the outer circumference SFP track physical address, and bits 15 to 0 provide information indicating the physical address of the outer circumference side control track.

The GCP information of page number 3 is shown in FIG.
As shown in FIG. 3, it is information indicating the inner circumference SFP track physical address, and bits 15 to 0 provide information indicating the physical address of the inner circumference side control track.

The GCP information of page number 4 is shown in FIG.
As shown in FIG. 4, it is information indicating the maximum read power, and bits 15 to 8 provide information indicating the maximum read power. In addition, G of this page number 4
Bits 7 to 0 of the CP information are preliminary information.

The GCP information of page number 5 is shown in FIG.
As shown in 5, the outer control track clock ratio /
It is information indicating the number of segments per sector, which is information indicating the number of clocks of the outer peripheral control track in bits 15 to 8, and provides the clock value "M" shown in FIG. 14, and in bits 7 to 0 It is designed to provide information indicating the number of segments per sector.

The GCP information of page number 6 is shown in FIG.
Inner circumference control track clock ratio /
It is information indicating the number of segments per sector, and bits 15 to 8 provide information indicating the number of clocks of the inner peripheral control track, and bits 7 to 0 provide information indicating the number of segments per sector. Has become.

The GCP information of page number 7 is shown in FIG.
As shown in 7, information indicating the number of clocks per segment / the number of servo clocks per segment is provided, and bits 15 to 8 provide information indicating the number of clocks per segment, and bits 7 to 0 provide information per segment. It is designed to provide information indicating the number of servo clocks.

The GCP information of page number 8 is shown in FIG.
As shown in FIG. 8, it is information indicating the number of segments per track, and bits 15 to 0 provide information indicating the number of segments per track.

Further, the GCP information of page number 9 is information indicating the number of attress segments per track / spare as shown in FIG. 29, and is information indicating the number of attress segments per track by bits 15 to 8. To provide. In addition, GC of this page number 9
Bits 7 to 0 of the P information are preliminary information.

Next, in the control track, the above-mentioned 20 bytes of GCP information, laser wavelength, reflectance,
70 bytes of media information such as track pitch, various physical block addresses, number of bytes in data fields, number of data clocks in various areas, number of zones, etc.
3 bytes of system information and definition data of each zone
20-byte band information is recorded.

In this control track, information A (A = segment number / track) indicating the number of segments (1 byte) per track, information B indicating the start track number (2 bytes) of each zone, and total track of each zone By recording the information indicating the number (2 bytes) and the information D (D = number of segments / sector) indicating the number of segments per sector (1 byte), for example, from the serial sector address, the physical The track address and physical segment address can be calculated.

That is, a serial sector address is converted into a zone number E and an offset number F using a table, and an operation of F × D / A = G (quotient) ... H (remainder) is performed from the offset number F. Thus, the physical track address = B + G physical segment address = H 2 and the physical track address and the physical segment address in the zone can be calculated.

As described above, the magneto-optical disk 2 records the address mark ADM and the sector marks STM1 and STM2 in the servo area ARs, thereby increasing the redundancy of the address area ASEG and the sector without increasing the redundancy of the data area ARd. It is possible to provide information indicating that it is the first segment of the. Moreover, the sector marks STM1 and STM2 indicate whether the segment is the data segment DSEG at the beginning of the sector or the segment immediately before the segment, so that a defect or the like occurs in one sector mark. However, it is possible to prevent the inconvenience that all the sectors are defective sectors, and it is possible to reduce the occurrence rate of defective sectors.

Further, since the magneto-optical disk 2 is adapted to record the servo pit having a length of 2 clocks with respect to the servo clock SCK to be formed in the servo area ARs, the servo area ARs is not recorded. The number of mirror parts can be reduced. Therefore, it is possible to reduce the occurrence of ghost pits and the like when forming the disc. Further, since the pit interval is 5 pit width or more at the shortest, mutual interference of data at the time of reproduction can be suppressed, and stable servo signal formation can be realized.

Further, since the scrambled recording data is recorded in the data segment DSEG as the NRZI modulated data, the recording pattern can be randomized and the inconvenience of continuous fixed patterns can be prevented. it can. Therefore, it is possible to stably form the disc and reduce the memory capacity at the time of Viterbi decoding at the time of reproduction.

Further, since the pre-write area AR _PR and the post-write area AR _PO are provided in the data area ARd of the data segment DSEG, the remaining heat time by the laser beam can be secured, and the data area ARd can be reliably stored. It is possible to record various data.

Further, since the servo information and the address information are provided by the servo areas ARs and the address segments ASEG which are arranged at equal angle divisions, the servo clock obtained on the basis of the servo information in the reproducing system is provided. With SCK, address information can be read regardless of data recording / reproduction, and stable high-speed seek can be realized. Further, since the number of sectors in each of the plurality of zones is the same and the data capacity is equal, there is no need to change the number of parity sectors or alternate sectors for each zone,
The control software can be simplified.

Further, since the end segment of the zone and the start segment of the next zone are provided so as to be continuous, it is possible to prevent the formation of useless segments. Further, since the start segment of each zone is arranged at the same position of each track, the start of each zone can be the segment of the same segment number, and the management of each zone can be facilitated.

Further, by the GCP area extending over a plurality of tracks, it is possible to provide gray coded media information in the same format as the address information recorded in the address segment ASEG. Therefore, it is possible to detect the media information by also using the decoder for detecting the address information. In addition, it is not necessary to use a special signal generator even at the time of cutting, and address information can be read during reading of the GCP area at the time of reproduction, which enables reliable management of the pickup position. .

Further, the magneto-optical disk 2 has the above-mentioned GC.
The P area makes it possible to provide the reproducing apparatus with media information indicating the type and format of the media and information for reading the information of the control track. Further, since the media information having the same content can be provided a plurality of times in one round of the track, it is possible to provide the playback device with the highly reliable media information. Also, since the media information having the same content can be provided by each segment located in the radial direction of each track in the GCP area, the media information can be reproduced even in the off-track state.

Further, in the magneto-optical disk 2, since the same media information can be provided by the GCP areas provided near the inner peripheral edge and the outer peripheral edge, the recording / reproducing apparatus and the outer peripheral side which access start from the inner peripheral side can be provided. It is possible to support any of the recording / reproducing devices whose access is started from.

Since the magneto-optical disk 2 has such various characteristics, the total storage capacity is greatly improved.

Next, the operation of the certifying system will be described with reference to the flowchart shown in FIG. First,
In the flowchart shown in FIG. 3, the main power sources of the certifying drive 20 and the host computer 21 are turned on, and the magneto-optical disk 2 is mounted on each magneto-optical disk recording / reproducing apparatus 1 of the certifying drive 20. Start and step S
Proceed to 1.

Here, when performing the certification process for the magneto-optical disk 2, the keyboard of the host computer 21 is operated to specify "certify".
As a result, the host computer 21 sends the SCSI
A signal (certify start signal) designating the start of certification is supplied to the system controller 8 of each magneto-optical disk recording / reproducing apparatus 1 through the interface 11. The system controller 8 is adapted to detect the start of certification and perform the certification process by being supplied with the certification start signal. Therefore, the above step S1
Then, the system controller 8 detects whether or not the certification start signal is supplied,
Determine if start of certify is specified, N
In the case of o, the step S1 is repeated until the certification start signal is supplied, and in the case of Yes,
Go to step S2.

In step S2, since the certify start signal is supplied, the system controller 8 controls each part so that a predetermined certify pattern is written on the entire surface of the magneto-optical disk 2, and the process proceeds to step S2.

That is, the system controller 8
Is supplied with the certify start signal, enters the certify mode, rotationally drives the spindle motor 3 at a constant angular velocity, and detects the rotational speed of the spindle motor 3. Then, when it is detected that the spindle motor 3 has reached a predetermined rotation speed, the optical pickup 4 is controlled to move to the outer peripheral edge or the inner peripheral edge of the magneto-optical disk 2 so as to move outside the recording area of the magneto-optical disk 2 (zone 0). The optical pickup is driven to emit light so as to irradiate the laser beam to the GCP area (outside of .about.15) to pull in the focus.

When the focus is pulled in the recording area, the recorded data may be erroneously erased when the sensitivity of the magneto-optical disk 2 is high. Since the data is recorded in, the erroneous erasing of the data can be prevented by moving the optical pickup 4 to the GCP area to pull in the focus.

Next, when the magneto-optical disk 2 is irradiated with a laser beam, return light of the laser beam is generated.
The optical pickup 4 receives the return light, forms a light amount detection signal of the return light, and supplies this to the signal processing system 6 and the servo control system 7 via the amplifier 5. The signal processing system 6 detects the media information recorded in the GCP area based on the light amount detection signal and supplies it to the system controller 8. When the system information is supplied, the system controller 8 determines whether the magneto-optical disk 2 is a hybrid disk having a read-only ROM area or the entire area is a magneto-optical recording area based on the media information. Determine if the disk is

As described above, gray coded media information is recorded in the GCP area in the same format as the address information. Therefore, the system controller 8 can read the media information by the same reading method as the address information, and both reading methods can be combined to simplify the control program. Moreover, since the above-mentioned media information is recorded in each GCP area of a plurality of tracks, the media information can be read before the completion of the tracking servo pull-in, until certification or recording / reproduction is started. The time required for can be shortened.

Next, the system controller 8 controls the servo control system 7 so as to supply, for example, a triangular wave current to the optical pickup 4. As a result, the focus actuator of the optical pickup 4 is driven up and down in accordance with the triangular wave to enter the focus search state. The light amount detection signal during this focus search is
It is supplied to the servo control system 7. The servo control system 7
Detects a focus error based on the light amount detection signal and supplies the focus error signal to the system controller 8. The system controller 8 is
The focus error signal is subjected to a predetermined filtering process and supplied to the servo control system 7. The servo control system 7 controls the focus of the optical pickup 4 according to the focus error signal so that the focus error becomes zero. As a result, a servo loop for focus control is formed.

Next, when such focus control is stabilized, the amplitude of the RF signal or MO signal from the above-mentioned pre-write area AR _PR detected by the signal processing system 6 becomes constant to some extent. This RF signal or MO signal is
The signal processing system 6 clamps to an appropriate potential. Thus, by performing clamping using the pre-write area AR _PR, it is possible to obtain a stable signal, it is possible to enable accurate clamping operation.

Next, the signal processing system 6 detects the pit pattern currently being reproduced based on the amplitude difference of the RF signal, and detects the same pit pattern as the pit row in the predetermined servo area. When the same pit pattern as the pit row of the servo area is detected, a window is formed in the servo area of the next frame, which is the timing when the next pit pattern should appear, and the window is formed again at the timing when the window is formed. It is detected whether the pit patterns match.

Such a pit pattern detecting operation is continuously performed a predetermined number of times, and when the coincidence of both patterns is detected a predetermined number of times consecutively, the signal processing system 6 detects the disc rotation phase relative to the rotational phase of the disc. The phase of the servo clock is regarded as locked.

Here, reproduction R of the wobble pit Pb
As shown in FIG. 30, the F signal has the waveform of the waveform at the respective timings t _b1 , t _b2 , t _c1 , and t _c2 of the servo clock that are temporally moved back and forth by one servo clock from the center point (the apex of the waveform) of the signal waveform. Both shoulders are sampled. Then, the sampling data formed by sampling at the timings t _b1 , t _b2 , t _c1 , and t _c2 are respectively b
The phase error (detected phase error data) between the servo clock and the servo data is detected by the following mathematical expressions as 1, b2, c1 and c2.

Phase error data = [(b2-b1) + (c
2-c1)] / 2 Then, the phase servo control by the PLL is performed so that the value of the phase error data is always zero.

As described above, the wobble pits Pb are detected by the tracking position by detecting the amplitude difference between the shoulders of the wobble pits Pb and Pc in the servo area, adding them, and averaging the added value to detect the phase information. , Pc, even if there is an amplitude change in the reproduced waveform, it can be absorbed by the averaging, and the gain fluctuation can be prevented.

Next, when the PLL is locked, the system controller 8 forms a window at the four timings A, B, C and D shown in FIG. 6, and at each of these timings A, B, C and D. The reproduction RF signal of the first pit Pa is sampled and detected, and the signal processing system 6 is controlled so as to detect the maximum value among the sampled values.
When this maximum value is detected at the timing A, it means that the maximum value is that of the address mark ADM. Therefore, it can be detected that the segment is the address segment and is the beginning of the frame. As a result, the frame counter incorporated in the system controller 8 can be cleared and the frame can be synchronized.

That is, since one frame is composed of 14 segments, the system controller 8
A window is formed every 14 segments, and it is determined that the frame synchronization is locked when the address mark is continuously detected a predetermined number of times. Since the position where the address is recorded can be detected when the frame synchronization is applied, the system controller 8 decodes the access code and the frame code.

Specifically, the above system controller 8
Controls the signal processing system 6 so as to sample the reproduction RF signals at the respective positions a, b, c, d shown in FIG.
The position where the amplitude value is maximum is detected by the maximum difference detection method (differential detection method).
Similarly, the system controller 8 controls the signal processing system 6 so as to sample the reproduced RF signals at the respective positions e, f, g and h shown in FIG. 7, and the amplitude value thereof becomes maximum. Detect the position. Then, the above decoding is performed by comparing these combinations with the gray code table shown in FIG. 7 and detecting a match between them.

By this method, the track address [A
M] to [AL], parity data [P], frame addresses [FM] and [FL] are decoded, and the decoding result is stored in the register. The system controller 8 is
When these data are confirmed, the decoding result stored in the above register is read out, so that the optical pickup 4
Detect the current position of. However, since it is gray-coded not only in 4 bits but in the whole, it is not a simple match, but it is compared with a table that is inverted or non-inverted depending on whether the LSB of the upper 4 bits is "1" or "0". Make a comparison. Here, the first decoded frame code is loaded into the frame counter, and the numerical value obtained by incrementing this frame counter for each frame,
It is determined that the rotation synchronization has been applied when the frame codes actually reproduced are compared with each other and they match a predetermined number of times in succession. Hereinafter, the numerical value obtained by the frame counter will be referred to as a frame code. As a result, the frame position can be detected without erroneous detection even if some defect or the like occurs on the disc.

Further, the system controller 8 decodes the GCP information in the same manner as the track address and frame code. However, the contents of the GCP area ARgcp are detected by reading the decoding result stored in the register in the GCP segment GCPseg in which the GCP information is recorded, not in the address segment.

Further, the system controller 8 controls the movement of the optical pickup 4 to a target track while calculating the moving speed of the optical pickup 4 while reading the gray-coded track address at the time of seek. Then, when it is detected that the optical pickup 4 is controlled to move to the target track, tracking control is performed.

As described above, the tracking error signal is
It is detected as the difference between the amplitude values of the reproduced RF signals of the two wobble pits recorded in the servo area. The system controller 8 performs a predetermined filtering process on the tracking error signal and supplies it to the servo control system 7. The servo control system 7 controls the optical pickup 4 based on the tracking error signal so that the tracking error becomes zero. As a result, a servo loop for tracking control is formed.

Next, when tracking is performed in this way, the system controller 8 detects the head position of the target sector. As described above, the sector mark STM1 and STM2 are recorded in the leading segment of each sector and the segment immediately before it.
The reproduction RF signal of each sector mark STM1, STM2 is
Sampling is performed at four timings A, B, C, and D shown in FIG. The system controller 8 detects the maximum value among the sampled values. If this maximum value is sampled at the timing of B, it indicates that the segment is the first segment of the sector, and if it is sampled at the timing of C, the segment is Indicates that the segment is one segment before the beginning of the sector. Basically, the leading segment of a sector is determined by converting the sector address formed by the system controller 8 into a physical sector and calculating which segment of which track the sector is. The empirical probability that the above-mentioned two types of sector marks become defective at the same time is 10 ⁻¹⁰ or less, and the probability of occurrence of defective sectors due to this is extremely small.

Next, the system controller 8 drives the optical pickup 4 to emit light so as to emit a laser beam having a recording intensity when the focus servo and the tracking servo are applied, and the first ROM shown in FIG.
A certify pattern, which is a predetermined pattern such as “23FC”, is read out from 9 and supplied to the EFM processing circuit 12. The EFM processing circuit 12 performs so-called 8-14 modulation processing on the certify pattern and supplies it to the magnetic head driver 13. The magnetic head driver 13 drives the magnetic head 14 according to the certify pattern (magnetic field modulation drive).

The portion of the magneto-optical disk 2 irradiated with the laser beam having the recording intensity from the optical pickup 4 is heated to the so-called Curie temperature and loses the coercive force. By applying a modulating magnetic field from the magnetic head 14 driven according to the certify pattern, the magneto-optical film of the magneto-optical disk 2 is magnetized according to the certify pattern, and the certify pattern is recorded. Is done.

At the time of recording the certify pattern and at the time of recording the original pattern which will be described later, when the system controller 8 scans the servo area in which the servo pattern is recorded by the pre-pits, the laser beam having the reproduction intensity is emitted. The optical pickup 4 is driven to emit light so as to be emitted, and the laser beam of the reproduction intensity is switched to the laser beam of the recording intensity at the timing when the optical pickup 4 moves from the servo area to the prewrite area of the data area. Then, the optical pickup 4 is driven to emit light to record a certify pattern (and an original pattern).

The system controller 8 records the certify pattern on the entire surface of the magneto-optical disk 2 in this way, and proceeds to step S3 shown in FIG. In step S3, the system controller 8 determines whether or not the certify pattern is recorded on the entire surface of the magneto-optical disk 2 by detecting the zone and address where the certify pattern is currently recorded. It is determined whether or not this certification has been completed. Then, when it is determined in step S3 that the certification is not completed (in the case of No),
Step S2 is repeated until the certification is completed, and when it is judged that the certification is completed (Y
In the case of es), the process proceeds to step S4.

In step S4, the system controller 8 supplies data (certify end signal) indicating that the certification is completed to the host computer 21 shown in FIG. 2 and proceeds to step S5. When the certify end signal is supplied, the host computer 21 supplies an original pattern write designating signal for designating the writing of the original pattern to the system controller 8. The system controller 8 starts recording the original pattern when the original pattern writing designation signal is supplied. Therefore, in step S5, the system controller 8 determines whether or not the writing of the original pattern is designated by detecting whether or not the original pattern writing designation signal is supplied, and in the case of No, the writing is determined. This step S5 is repeated until it is designated (until the write designation signal is supplied), and if Yes, the process proceeds to step S6. In step S6, the system controller 8 controls each unit to write the original pattern on the magneto-optical disk 2.

That is, the system controller 8
When the original pattern write designating signal is supplied, reads out the original pattern from the second ROM 10 shown in FIG. This original pattern may be any pattern as long as it is a pattern different from the certify pattern and can be recognized by the maker. For example, the "maker's name" and "manufacturing number" of the maker who produced the magneto-optical disc 2 are used. , "Manufacturing date" and the like. Such an original pattern is recorded in the second ROM 10 by, for example, an ASCII code (ASCII: American Information Exchange Standard Code), and when the system controller 8 reads this original pattern,
Similar to the above-mentioned certify pattern, a predetermined scramble process is performed, and this is supplied to the magnetic head 14 via the EFM processing circuit 12 and the magnetic head driver 13. In addition, as described with reference to FIG.
An address segment ASEG in which a track number, which is position information in the radial direction on the disc, and a segment number, which is position information in the tangential direction, are recorded by pre-pits is recorded on. Therefore, the system controller 8 controls the movement of the optical pickup 4 and the magnetic head 14 based on the address segment ASEG, for example, every 1000 tracks. Then, for each movement control, the optical pickup 4 and the magnetic head 14 are drive-controlled so that the original pattern is recorded in all the head sectors of each track. As a result, the above-mentioned ASCII coded original pattern can be recorded at every 1000 tracks of the magneto-optical disk 2. The magneto-optical disk 2 on which the original pattern is recorded as described above is a magneto-optical disk to which the recording medium according to the present invention is applied. The original pattern does not necessarily need to be made as ASCII code and may be recorded by using another code or the like.

Next, in step S7 shown in FIG. 3, the system controller 8 determines whether or not the recording of the original pattern at every 1000 tracks is completed based on the address segment ASEG, and if No. In this case, the routines of step S6 and step S7 are repeated until the recording is completed, and Yes
In the case of s, all the routines for recording the certify pattern and the original pattern are ended.

Next, when the recording of each pattern is completed, the system controller 8 controls the optical pickup 4 so that the entire recording area of the magneto-optical disk 2 is scanned with the laser beam having the reproducing intensity. At the same time, the reproduced MO signal is detected to determine whether or not the certify pattern and the original pattern are accurately reproduced. When the above patterns are correctly reproduced, the magneto-optical disk 2 is a non-defective product, and therefore a certify mode end signal indicating the end of the certify mode is supplied to the host computer 21 so that the above patterns are accurately reproduced. If it is not reproduced, the magneto-optical disk 2 is a defective product, so a signal indicating that the magneto-optical disk 2 is a defective product is supplied to the host computer 21, and the certify mode is ended. .

Here, the magneto-optical disk 2 on which the above-mentioned original pattern is recorded is shipped and purchased by a user through a retail store or the like and used. However, some trouble occurs during the use of the magneto-optical disk 2. If this happens, the user may be asked to take responsibility for it. In such a case, the manufacturer side can easily determine the side that is truly responsible, as described below, by detecting the remaining condition of the original pattern.

That is, when all the original patterns recorded at the beginning remain when the manufacturer detects the remaining condition of the original pattern, the user cannot use the magneto-optical disk 2 at all. In addition to showing that, the magneto-optical disk 2 at the time of shipment
Has already occurred, or there is an abnormality on the drive side owned by the user. Therefore, when the drive owned by the user is investigated and there is no abnormality, it is understood that the magneto-optical disk 2 is defective from the beginning and the manufacturer is responsible for the trouble. In addition, when the user owns a drive, the magneto-optical disk 2 has no problem and the user is responsible for the trouble if the drive has an abnormality or if there is a problem in the usage status. I understand.

When the manufacturer detects the remaining condition of the original pattern, if some original patterns remain among all the original patterns recorded initially, this is the used recording area and the unused area. Indicates that there is some abnormality on the boundary with the recording area, that an abnormality has occurred on the drive side during recording, or that there is a problem in the usage state of the user. Therefore, when the drive owned by the user and the usage state are investigated and there is no abnormality, it is understood that the magneto-optical disk 2 is defective from the beginning and the manufacturer is responsible for the trouble. In addition, if the user owns a drive, the magneto-optical disk 2 has no problem if the drive has an abnormality or if there is a problem in the user's usage status, and the user is responsible for the trouble. You can see that

Further, when the manufacturer detects the remaining state of the original pattern and all the original patterns recorded first do not remain, this means that the entire recording area has been used at least once. There is. Therefore, in this case, there is no problem when the user purchases the magneto-optical disk 2, and the trouble caused by the usage state or the storage state occurs after the purchase. Therefore, in this case, it is understood that the manufacturer has no responsibility and the user has responsibility.

In addition, a certificate original manufacturer's certificate may be used in some cases. In this case, the medium has the original pattern recorded at the same time when the certification is completed.

By recording the original pattern on the disc in this manner, the magneto-optical disc 2 can be recorded.
Even if some trouble occurs while the user is using the product and the manufacturer asks for the responsibility, the manufacturer detects the remaining condition of the original pattern, and the cause of the problem lies with the user. It is possible to easily determine whether or not it is on the manufacturer side, and it is possible to shorten the time required for checking the cause of the trouble by checking.

In the description of the above embodiment, the magneto-optical disk 2 is a RAM disk whose entire area is a recording area (RAM area), but this is a read-only area (ROM area). It may be a hybrid disc having both a RAM area and a RAM area. Also, 100
The original pattern is recorded every 0 tracks, but this can be arbitrarily changed such as every 500 tracks or every 2000 tracks. Although the original pattern is recorded every 1000 tracks, it may be recorded in the entire recording area (in this case, the certify pattern may be omitted) or in a part thereof. Alternatively, the original pattern may be recorded in all (or a part) of the first sector of each zone formed by dividing the entire recording area into 16. Furthermore, an example in which the recording medium according to the present invention is applied to a magneto-optical disk and the recording device according to the present invention is applied to a magneto-optical disk recording / reproducing apparatus has been described. In addition to disc-shaped recording media such as
Cassette tape, digital audio tape (DA
T), it may be applied to a tape-shaped recording medium such as a data cartridge.

Finally, the technical idea according to the present invention is that "the original pattern unique to the manufacturer is recorded in advance on the recording medium so as to differentiate it from the certify pattern and the format pattern, and when a trouble occurs, Contributes to the pursuit of the cause. " Therefore, it goes without saying that various modifications can be made in accordance with the design etc. within a range not departing from this technical idea.

[0117]

The recording medium and recording apparatus according to the present invention are
It is possible to easily determine whether the user or the manufacturer is responsible for any trouble in the recording medium. Therefore, the time required to investigate the cause of the trouble can be shortened.

[Brief description of the drawings]

FIG. 1 is a block diagram of a magneto-optical disk recording / reproducing device to which a recording medium and a recording device according to the present invention are applied.

FIG. 2 is a diagram for explaining a configuration of a certifying system including a plurality of the magneto-optical disk recording / reproducing devices.

FIG. 3 is a flowchart for explaining the operation of the certify system.

FIG. 4 is a diagram showing a segment structure of a magneto-optical disk which is subjected to certification processing by the certification system.

FIG. 5 is a diagram showing a format of a servo area of the magneto-optical disk.

FIG. 6 is a diagram for explaining a method of detecting the first pit in the servo area of the magneto-optical disk.

FIG. 7 is a diagram showing a format of an address segment of the magneto-optical disk.

FIG. 8 is a diagram showing a part of an access code recorded in an address segment of the magneto-optical disk.

FIG. 9 is a diagram showing a format of a data segment of the magneto-optical disk.

FIG. 10 is a diagram showing a format of a servo area of a ROM area when the ROM area is provided in the magneto-optical disk.

FIG. 11 is a diagram showing a configuration of one frame and one data sector of the magneto-optical disk.

FIG. 12 is a diagram showing a data format of a data sector of the magneto-optical disk.

FIG. 13 is a diagram showing a reproduced waveform of a reference pattern of a data sector of the magneto-optical disk.

FIG. 14 is a diagram showing setting parameters for area division of the magneto-optical disk.

FIG. 15 is a diagram showing a state of area division of the magneto-optical disk.

FIG. 16 is a diagram showing a format of a data sector of the magneto-optical disk.

FIG. 17 is a diagram showing an arrangement state of GCP segments of the magneto-optical disk.

FIG. 18 is a diagram showing a structure of the GCP segment.

FIG. 19 is a diagram showing the relationship between the page number of the GCP segment of the magneto-optical disk and the frame address of the address segment.

FIG. 20: GC of page number 1 of the above GCP segment
It is a figure which shows the content of P information.

FIG. 21: GC of page number 2 of the GCP segment
It is a figure which shows the content of P information.

FIG. 22: GC of page number 3 of the GCP segment
It is a figure which shows the content of P information.

FIG. 23: GC of page number 4 of the GCP segment
It is a figure which shows the content of P information.

FIG. 24: GC of page number 5 of the above GCP segment
It is a figure which shows the content of P information.

FIG. 25: GC of page number 6 of the GCP segment
It is a figure which shows the content of P information.

FIG. 26: GC of page number 7 of the GCP segment
It is a figure which shows the content of P information.

FIG. 27: GC of page number 8 of the GCP segment
It is a figure which shows the content of P information.

FIG. 28: GC of page number 9 of the GCP segment
It is a figure which shows the content of P information.

FIG. 29 G of page number 10 of the GCP segment
It is a figure which shows the content of CP information.

FIG. 30 is a diagram for explaining a sample timing for extracting clock information from a reproduction RF signal of wobble pits recorded at predetermined intervals on the magneto-optical disc.

[Explanation of symbols]

 1 magneto-optical disk recording / reproducing device 2 magneto-optical disk 3 spindle motor 4 optical pickup 5 amplifier circuit (amplifier) 6 signal processing system 7 servo control system 8 system controller 9 first ROM 10 second ROM 11 SCSI interface 12 EFM processing Circuit (8-14 modulation processing circuit) 13 Magnetic head driver 14 Magnetic head 20 Certifying drive 21 Host computer

Claims (4)

[Claims] 1. A writable recording medium in which a predetermined identification pattern different from the certify pattern is recorded in the whole or a part of the recording area or at predetermined intervals. 2. The writable recording medium according to claim 1, wherein the recording area has a disk shape capable of magnetic recording or magneto-optical recording. 3. A certification pattern generating means for generating a predetermined certification pattern, an identification pattern generating means for generating a predetermined identification pattern different from the certification pattern, and a recording of the certification pattern and the identification pattern on a recording medium. Recording means for performing the above, and recording the certify pattern from the certify pattern generating means on the recording medium,
A recording device having a control means for controlling the recording means so as to record the identification pattern from the identification pattern generating means on the whole or a part of the recording area or at predetermined intervals. 4. The recording medium is a magnetic disk or a magneto-optical disk, and the recording means performs magnetic recording or magneto-optical recording corresponding to the magnetic disk or magneto-optical disk. The recording device according to 3.