JP3527572B2 - CD-E writing system device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-E writing device for writing data on a rewritable disc having a CD format (hereinafter referred to as CD-E), and a C-E writing device.
CD-comprising a host computer connected to the D-E writing device and constructing a file structure on the CD-E
The present invention relates to an E writing system device. Specifically, the CD
Rewritable optical disc (CD-
E-disk) defect management, especially,
The present invention relates to a CD-E writing system device capable of defect management compatible with the international standard ISO 9660 format. It can also be applied to the ECMA168 format and CD-DA (music CD).

[0002]

2. Description of the Related Art Conventionally, the CD format has a structure in which error correction to a defect is taken into consideration to some extent. Conventionally, a rewritable CD-ROM disc is used to edit an image file in an electronic file device (Japanese Patent Laid-Open No. 63-2148878), and when a reproduction data error occurs, a reproduction operation is retried. There is known an optical information reproducing apparatus (Japanese Patent Laid-Open No. 5-74064) in which the frequency of error occurrence is reduced by executing the above. However, in the case of a rewritable CD-E disc, unlike a medium such as a magneto-optical disc, it has not been created in consideration of replacement in advance. Where C
The format of the DE disk will be described.

A rewritable CD-E disc is
It basically follows the disc layout of CD-ROM discs specified in the Orange Book. This CD-RO
The format of M is Orange Book (Orange)
Book: Recordable Compact D
Its physical format is defined by isc System Description). As the logical format, the file system of the OS of the computer can be used. Also, there is ISO 9660 as an international standard.

The CD-R format information is a table used for converting a directory structure, a file name, etc. so as to match the file system used for each CD-R disc. Where the international standard I
The file system of the CD-R disc defined by SO 9660 will be described.

FIG. 11 is a diagram conceptually showing a file and directory structure defined by the international standard ISO 9660.

As shown in FIG. 11, ISO 966
The file and directory structure of 0 is a tree structure. For each session, there is a volume descriptor (the area where the attributes of each session are written: on the upper left side of the figure), followed by a path table, a directory, and a file (a set of multiple file sections).

Each directory can also be recognized from the path table. In short, the root directory is located at the top and the directories are located below it. The directory can be up to the 8th place. A basic directory consists of a plurality of file sections as shown below, and constitutes one file. The directory that is not the lowest is composed of one or a plurality of file sections and one or a plurality of directories. International standard ISO 9660
The file system of the CD-R disc specified in
The structure is as shown in FIG. 11, and a file structure is constructed for each CD-R disc.

The CD image means data which is to be written on a CD-R, which is formatted according to a logical format to be used in advance, and which is stored as a file on a hard disk or the like. In addition, existing commercially available C
D is a CD-D recording audio data
Examples of the disk include an A disk and a CD-PROM disk which records digital data used by a computer. The above is the main meaning of the term regarding CD-R. next,
The layout of the CD-E disc will be described in detail.

FIG. 12 is a diagram for explaining the format of a CD-E disc. (1) is a top view of the CD-E disc,
(2) is a side view and a diagram showing a layout of a single session format. In the figure, PCA is the power calibration area and PMA is the program area.
Indicates a memory area.

As shown in an enlarged view below FIG. 12 (2),
A power calibration area PCA is provided on the innermost side (center side) of the disc. This PC
A is divided into two areas, a calibration area and a count area. A program memory area PMA is provided outside the PCA, and track information is written therein. The track information includes information such as what track starts where.

Further, this program memory area P
The MA has a TOC (Ta
This is an area for recording information necessary for writing ble of content, for example, the start / stop position of a track. It is also used to reserve the range of tracks to be written. A data area is provided on the outer peripheral side. This data area is divided into three areas: lead-in, user data, and lead-out.

The central user data area is
This area literally holds the data that the user wants to write. The lead-in area provided inside is
Used when constructing TOC information described later. Further, the lead-out area is located behind (outer area) the user data and plays a role of a user data protection area. A disc in which only one set of lead-in, user data, and lead-out is arranged as shown in FIG. 12 is called a single session, and as shown in FIG.
A disc in which a plurality of sets of lead-in, user data, and lead-out are arranged is called a multi-session (two sessions).

FIG. 13 is a diagram for explaining the format of a multi-session CD-E disc. Reference numerals in the figure are the same as those in FIG.

The CD-E disc shown in FIG. 13 is different from the CD-E disc shown in FIG. 12 in that two sets (plural sets) of lead-in, user data and lead-out are arranged. Here, CD-E (CD-R
Same as above) Each session will be described. In general,
Data is written on the CD-E disc in units of sessions.

Next, each session divided into three areas will be sequentially described. The lead-in area is an area in which header information of the session is recorded, and is information in which information such as a start address of each track / a skipped track number is recorded. Therefore, the session header information is written in the lead-in area of FIG. 12 (2) and FIG. Also, bad lebe
l is information indicating that the session is skipped and is also recorded during the lead-in.

Next, the user data area is an area for recording the actual write data. Finally, the lead-out area represents the end of the session. The above is the information recorded in each session. A track is a unit for writing data in a session. For example, in the case of music data, one track is used for one song.

FIG. 14 is an external view showing an example of the connection of a conventional CD-E writing system device.
In the figure, 1 is a host computer, 1a is a system unit, 1b is a display, 1c is a keyboard, 2
Indicates a CD-E drive device, and 3 indicates an I / F (interface) cable.

The host computer 1 comprises a system body 1a, a display 1b, a keyboard 1c and the like. Note that a pointing device or the like can be connected. The host computer 1 is connected to the CD-E drive device 2 via an I / F cable 3 (for example, a disk interface such as SCSI, ATAPI, or ATA).

The CD-E drive device 2 can be connected (added) a plurality of times, but the number of units that can be added differs depending on the type of interface used.
Up to 7 ITAP devices, ATAP
There is a limit of up to four I-interface devices and up to two ATA interface devices. Next, as an example of the CD-E drive device 2, the configuration of a CD player will be described with reference to the drawings.

FIG. 15 is a functional block diagram showing an example of the main structure of a CD player. In the figure, 11 is a CD (compact disc), 12 is an optical pickup, 13 is a spindle motor, 14 is an analog waveform shaping circuit, 15 is a digital signal section, 15a is a sync detection circuit, 15b is a digital signal processing circuit, and 15c is Crystal oscillator, 15d is a sub-coding detection circuit, 1
6 is a PLL circuit, 17 is a D / A converter filter, 1
Reference numeral 8 is a focus servo circuit, 19 is a tracking servo circuit, and 20 is a rotation servo circuit.

The CD player shown in FIG. 15 is a general stereo type player for compact discs and is known as a prior art, so a detailed description thereof will be omitted. The sub-coding detection circuit 15d is
The disk address information for track positioning is reproduced.

[0022]

As to the CD-E (rewritable disc having the CD format) disc, the format is the same as that of the CD-ROM disc defined by the Orange Book, as described above. Basically follow. However, with respect to the CD-E disc, when a defect such as an error is detected, a spare area for so-called spare processing, such as a magneto-optical disc, is not prepared, and a sufficient measure cannot be taken. There is.

In the present invention, first, the defect management in the CD-E is realized without violating the ISO 9660 format which is the existing CD-ROM format (the invention of claim 1). Secondly, it is possible to surely perform defect management at the time of writing to a track including a defect position (the invention of claim 2). Thirdly, when a defect is detected when writing is performed on a track with or without a defect, it is possible to effectively use the data area before and after the defect position (the invention of claim 3). ).

[0024]

According to a first aspect of the present invention, there is provided a CD-E writing device for writing data on a rewritable disc (hereinafter referred to as CD-E), and a CD-E connected to the CD-E writing device. In a CD-E writing system device including a host computer for constructing a file structure on E, the CD-E writing device includes a defect detection unit for detecting a defect during writing of user data, and a position and a length of the defect. The system management memory that holds the information on the
The recording means for recording at least one portion in a portion not used for the data on the D-E, the loading means for reading the defect information already recorded on the CD-E and loading it on the system management memory, and the defect information Means for notifying the host computer, the host computer constructing the file structure based on the defect information so as to have a file management structure that does not use the defect portion in the file system ;
During writing to a track whose presence or absence is unknown
When a defect is detected, the track
Fits into the track length that is located ahead of the perfect position
Determine if file is in data to be recorded
And the tigers located in front of the defect position.
If there is data that fits in the stack length, that file is
Record on the track where the effect was detected and
The track containing the defect position
Place, write dummy data to that track, and
User data remaining after the track containing the fact
And means for arranging tracks for recording the .

In the invention of claim 2, the CD-E of claim 1
In the writing system device, the CD-E writing device receives the write command from the host computer, and the writing position of the CD-E writing device includes the defect position of the CD-E
A unit is provided for notifying the host computer of an error in the case of a write command for a portion on E.

In the invention of claim 3, the CD-E of claim 1
In the writing system device, when a defect is detected during the writing operation for a track whose defect is unknown, a means for determining whether or not there is data that fits within the track length located in front of the defect position of the track, When there is data that fits within the track length that is located ahead of the defect position, rearrange the tracks that accommodate the data, arrange the track that includes the defect position after the rearranged track, and include the defect. Means for arranging the track to retain the remaining user data on the track,
It has and.

In the CD-E writing system device according to the present invention, the disk is focused on that the reflectance becomes lower when the defect portion is present on the CD-E disk than in the normal case. The defect position and the length are detected according to the level of the reflected light, and the information on the defect position and the length is stored. Then, when a write command for the track including the defect position is received, dummy data is written to the track including the defect position, and the use of the track is stopped,
Rewrite the data by the write command to the track separately secured behind the track including the defect position.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a CD-E writing system device of the present invention will be described in detail with reference to the drawings. This embodiment corresponds to the inventions of claims 1 to 3, but the invention of claim 1 is the basic invention.

FIG. 1 is a functional block diagram showing an embodiment of the main configuration of the CD-E drive device of the CD-E writing system device. The reference numerals in FIG.
The same as 4; 21 is a CPU, 22 is a ROM, 23 is a RAM, 24 is a host I / F circuit, 25 is a buffer memory, 26 is a CIRC encoder (encoder / interleave), 27 is a CIRC decoder, and 28 is an EFM demodulator. Circuit, 29 is EFM modulation circuit, 30 is LD controller, 31 is amplifier, 32 is optical pickup, 33 is first stage amplifier, 34 is AGC circuit, 35 is PLL circuit, 36 is focus servo circuit, 37 is seek servo circuit, 38
Is a tracking servo circuit, 39 is a spindle servo circuit, 40 is an amplifier, 41 is a spindle motor, and 42 is C.
DE disk, 43 is a processor for mechanical control, and 44 is an internal bus.

FIG. 1 shows a typical structure of a CD-E drive device. The basic hardware configuration and operation of the CD-E writing system device of the present invention are also common to those of the conventional CD-E writing system device shown in FIG. 14, but the CPU 1 has a configuration shown in FIG. It is characterized in that the control is performed according to the flowchart shown in FIG. The functions of the respective parts of the CD-E drive device shown in FIG. 1 are as follows. The CD-E drive device usually has a built-in processor such as a CPU 21, a CPU 21, a ROM 22 (EPROM, flash ROM, etc.), a RAM 23, a host I / F circuit 24,
The mechanical control processor 43 and the like are connected to the internal bus 44.

The host I / F circuit 24 is connected to the buffer memory 25. The buffer memory 25 temporarily holds the write data received from the host computer 1 and read data read from the CD-E disk 42. Are used for holding until the transfer to the host computer 1. The write data received from the host I / F circuit 24 to the buffer memory 25 is input to the CIRC encoder 26. Then, in the CIRC encoder 26, after the ECC code is generated or interleaved according to the command writing mode,
It is sent to the EFM modulation circuit 29, and EFM modulation is performed to perform writing.

The LD controller 30 has a function of controlling write power and controlling write strategy. At the time of reading, after the signal from the optical pickup 32 is input to the first stage amplifier 33, the AGC circuit 34 performs AGC (auto gain control) and the PLL circuit 35 performs PLL (phase locked loop). After that, the EFM demodulation circuit 28 performs EFM demodulation, and the CIRC decoder 2
Input to 7 to perform processing for returning ECC and interleave.

The user data after these processes are
The data is once input to the buffer memory 25, held therein, and transferred to the host computer 1. The mechanical control processor 43 controls various servo systems such as the focus servo circuit 36, the seek servo circuit 37, the tracking servo circuit 38, and the spindle servo circuit 39.

Although the ROM 22 and the RAM 23 are illustrated in the CD-E writing system device of FIG.
It is not necessary when built in U21. Further, when it has an I / F (interface) control with a host device and a buffer control (data management) function, the I / F device with the host device and the buffer controller may be integrated. Furthermore, the I / F device, the buffer control unit, and the read / write control unit with the host device may be integrated.

The above is the outline of the configuration and function of the CD-E writing device for writing data on the CD-E disc (rewritable disc having the CD format).
Next, in the CD-E writing device shown in FIG. 1, a specific example of means for detecting a defect during writing of user data will be described.

FIG. 2 shows the optical pickup 32 shown in FIG.
FIG. 3 is a side view showing an example of the configuration of the main part of FIG. In the figure, 51 is a CD-E disc, 52 is an objective lens, 53 is a polarization prism, 54 is a photodetector, and 5 is a photodetector.
Reference numeral 5 indicates an LD (semiconductor laser).

The laser light emitted from the LD 55 is incident on the objective lens 52 via the polarization prism 53, is focused here, and a spot is formed on the CD-E disk 51. The return light from the CD-E disc 51 is polarized by the polarizing prism 53, and the photo detector 54
Is incident on. In this case, the LD power during writing,
That is, the light emission power of the LD 55 (write power) is
It is controlled by the LD controller 30 of FIG. The above description is common to the inventions of claims 1 to 3.

First Embodiment of the Invention The first embodiment of the present invention corresponds to the invention of claim 1, and the defect management of a rewritable CD-E disc is performed by an existing CD-ROM. The feature is that it enables a file system compatible with the international standard ISO 9660 format. Next, the relationship between the LD power during writing and the sum signal detected by the photodetector 54 will be described.

FIG. 3 is a time chart showing the LD power during writing and the sum signal detected by the photodetector 54 when there is no defect.
Power, (2) indicates a sum signal (detect signal) detected by the photodetector 54. The horizontal axis of the figure shows time.

As is apparent from FIGS. 3 (1) and 3 (2),
When there is no defect on the CD-E disc 51, the return light from the CD-E disc 51 is proportional to the LD power. That is, the time width of the write power in FIG. 3 (1) and the time width of the H level of the returning light in FIG. 3 (2) match, and the time width of the erase power in FIG. 3 (1) The time width of the L level of the return light of 3 (2) agrees. The level is also proportional. On the other hand, if there is a defect on the CD-E disc 51, it changes as shown in FIG.

FIG. 4 is a time chart when there is a defect in the LD power during writing and the sum signal detected by the photodetector 54. (1) is the LD
Power, (2) is a CD-E disc 5 with defects
1 is a side view of FIG. 1, (3) shows a sum signal (detect signal) detected by the photodetector 54.

As shown in FIG. 4 (2), when there is a defect on the CD-E disc 51, if the level of the returning light from the defect portion is low, the detection signal by the photodetector 54 will be as shown in FIG. As indicated by the broken line in 3),
Distortion occurs. In the present invention, the position and length of the defect are detected by subtracting the distortion caused by the defect on the CD-E disk 51 by the signal value that should be returned originally. Even when the reflectance of the defect portion is high, it can be detected in the same manner.

It is also possible to perform a read operation after the write operation on the data that has been subjected to the write operation and compare the actually read data with the write data to be written to perform the defect detection. Further, at the time of this reading, the envelope of the waveform is monitored by the photodetector 54, and if the envelope does not reach the predetermined value, it may be determined as the position of the defect portion.

Information on the position and length of the defect thus detected is held in the RAM (23 in FIG. 1) secured as the CPU work area of the CD-E, and as an error, the information is stored in the host computer (FIG. 1). Notify 1). In this case, depending on the length of the error, etc.,
Instead of notifying the host computer 1 immediately, the host computer 1 may be notified separately by using an error notifying means such as an error notification command after the write processing is completed.

When the host computer 1 detects that the written data has not been correctly written by the defect detection means, it writes dummy data to the defective track and stops using the track. Next, the host computer 1
-Rewrite the data that should be written on the defective track on E, by reserving another track behind the defective track. The above operation will be described with a flow.

FIG. 5 is a flow chart showing a main processing flow at the time of writing data in the CD-E writing device side in the CD-E writing system device of the present invention. In the figure, # 1 to # 12 indicate steps.

At step # 1, the write command is received from the host computer 1 shown in FIG.
Then, the write data is received. In step # 3, the received data is written to the CD-E disc 42. In step # 4, it is checked whether there is any defect. As a result of checking the presence / absence of a defect, if there is no defect, the flow of FIG. 5 ends. On the other hand, if the result of checking in step # 4 is that there is a defect, the process proceeds to step # 5, and information on the defect position is stored in a predetermined area in the RAM 23, for example.

At step # 6, the defect list provided in the area on the CD-E disc 42 is updated.
In step # 7, it is checked whether a dummy data write command has been received from the host computer 1. When the dummy data write command is received,
In the next step # 8, dummy data is written in the defect track.

At step # 9, it is checked whether or not a reserve track command is received behind the defect track. When the reserved track command is received, the rewritten track is reserved in the next step # 10. At step # 11, it is checked whether a write command for the rewritten track has been received. When the command to the rewritten track is received, the write operation to the rewritten track is executed in the next step # 12, and the flow of FIG. 5 is ended.

The above is the CD-E writing device (CD-E
This is processing at the time of writing data on the drive side.
Next, a flow on the host computer 1 side will be shown.

FIG. 6 is a flow chart showing the main processing flow at the time of writing data on the host computer 1 side in the first embodiment of the present invention. In the figure, # 21 to # 27 indicate steps.

At step # 21, data to be written is created. At step # 22, the track is reserved.
In step # 23, the created data is written in the reserved track. At step # 24, it is checked whether a write error has occurred.

When a write error occurs, dummy data is written in the track where the error occurred in step # 25. At step # 26, the rewritten track is reserved behind the defect track.

At step # 27, dummy data is written in the rewritten track, and the flow of FIG. 6 is terminated. When writing data, the above processing is performed by the host computer 1. As detailed above,
In the embodiment of the first invention (the invention of claim 1), the defect management for the rewritable CD-E disc is realized without violating the international standard ISO 9660 format which is the existing CD-ROM format. can do.

That is, although the CD format is created in consideration of the error correction to the defect to some extent, it is not created in consideration of substitution in advance like the magneto-optical disk. However, according to the CD-E writing system device of the present invention, it is possible to realize a file system compatible with the conventional ISO 9660 even in such a format.

Second Embodiment of the Invention The second embodiment of the present invention corresponds to the invention of claim 2, and it is ensured that the defect management can be surely performed at the time of writing to the track including the defect position. It has features. The invention of claim 2 is a CD-
This is a case where it is known that the defect exists on an existing track on the E writing device (CD-E drive) side. The hardware configuration is the same as that of the first embodiment, and the CPU 21 shown in FIG.
The control is performed according to the flow shown in.

FIG. 7 is a flow chart showing a main processing flow at the time of writing data in the second embodiment of the present invention. In the figure, # 31 to # 35 indicate steps.

First, in step # 31, it is checked whether a disc (medium) has been inserted. When the disc is inserted, the defect information list is read from the disc in step # 32. Step # 3
At 3, it is checked whether a write command has been received.

When the write command is received, the process proceeds to step # 34 to check whether or not there is a defect at the data position of the write command. When there is a defect at the data position of the write command,
In the next step # 35, the error
Then, the flow of FIG. 7 is terminated. The processing according to the second embodiment is performed by the above processing.

That is, on the side of the CD-E writing device, it is known that a defect already exists on a certain track, and when a write command for the track is issued, error processing can be performed quickly. it can. As described above, according to the second embodiment, the defect management can be surely performed in the write operation on the track including the defect position.

Third Embodiment of the Invention The third embodiment of the present invention corresponds to the third embodiment of the present invention, in which a defect is detected in a write operation for a track whose presence on the disk is unknown. It is characterized in that the data areas before and after the defect position are effectively used when it is performed. The hardware configuration is the same as that of the first and second embodiments described above, and
The CPU 21 shown in FIG. 6 performs control according to the flow shown in FIGS.

FIG. 8 and FIG. 9 are flow charts showing the main processing flow at the time of data writing on the CD-E writing device side in the third embodiment of the present invention. In the figure, # 41 to # 57 indicate steps,
Indicates the connection point.

In step # 41 shown in FIG. 8, the write command is received from the host computer 1, and in the next step # 42, the write data is received. Step # 43
Then, the received data is written to the CD-E disc 42. In step # 44, it is checked whether there is any defect.

As a result of checking the presence of defects,
If there is no defect, the flow of FIGS. 8 and 9 is ended (from the connection of FIG. 8 to the connection of FIG. 9). On the other hand, if the result of checking in step # 44 is that there is a defect, the process proceeds to step # 45, and information on the defect position is stored in, for example, a predetermined area in the RAM 23.

At the next step # 46, the defect list provided in the area on the CD-E disc 42 is updated. In step # 47, it is checked whether or not a track reserve command for a file within the defect track of the defect track has been received. When the track reserve command is received, step # 48
Then reserve the truck.

In the next step # 49, it is checked whether or not a write command for the track before the defect position has been received. When the write command to the track is received, the process proceeds to step # 50 (shift from the connection of FIG. 8 to the connection of FIG. 9). In step # 50, it is checked whether or not a command for reserving the track including the defect position has been received.

At the next step # 51, the defect track is reserved. In step # 52, it is checked whether a dummy data write command has been received from the host computer 1. When the dummy data write command is received, the dummy data is written in the defect track in the next step # 53.

In step # 54, it is checked whether a reserve track command has been received after the defect track. When the reserve track command is received, the rewritten track is reserved in the next step # 55. In step # 56, it is checked whether a write command for the rewritten track has been received.

When the write command is received, in the next step # 57, the write operation to the rewritten track is executed, and the flow of FIGS. 8 and 9 is ended. More than,
This is processing at the time of writing on the side of the CD-E writing device according to the third embodiment. Next, the host computer 1
The processing on the side will be described.

FIG. 10 is a flowchart showing the main processing flow at the time of writing data on the host computer 1 side in the third embodiment of the present invention.
In the figure, # 61 to # 70 indicate steps.

At step # 61, the data to be written is created. At step # 62, the track is reserved.
Proceeding to step # 63, the created data is written in the reserved track. At step # 64, it is checked whether a write error has occurred.

When a write error occurs, it is checked in step # 65 whether or not there is a file that fits up to the defect position. If the file exists, in step # 66, tracks are reserved for the files that fit. In step # 67, the files that fit are written.

At step # 68, a dummy track having a length that covers the defect position is reserved. At step # 69, the dummy data is written on the defect track. Proceeding to step # 70, the tracks for the remaining data are reserved and data is written, and the flow of FIG. 10 is terminated.

By the above processing, when a defect is detected in a write operation for a track in which it is not known whether or not there is a defect on the disc, it is possible to effectively use the data areas before and after the defect position. That is, it is possible to improve the space efficiency of a portion that can be effectively used, instead of discarding the entire track having a defect.

[0075]

Although the CD format is made in consideration of the error correction to the defect to some extent, it is not made in consideration of substitution in advance like the magneto-optical disk. In the CD-E writing system device according to the first aspect, it is possible to realize the file system which can take the conventional ISO 9660 compatibility even in the format in which such substitution is not considered in advance.

In the CD-E writing system device according to the second aspect, when the CD-E drive knows that the defect already exists on the existing track and the write command is issued to the track, an error occurs. Processing can be done quickly.

In the CD-E writing system device according to the third aspect of the present invention, it is possible to improve the space efficiency of the portion that can be effectively used, instead of discarding the entire track having a defect.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of a main part configuration of a CD-E drive device of a CD-E writing system device.

FIG. 2 is a side view showing an example of the main configuration of the optical pickup 32 shown in FIG.

FIG. 3 is an LD power and a photodetector 5 during writing.
4 is a time chart when there is no defect in the sum signal detected by 4.

[FIG. 4] LD power and photodetector 5 during writing
4 is a time chart when there is a defect in the sum signal detected by 4.

FIG. 5 is a flowchart showing a main processing flow at the time of data writing in the CD-E writing device side in the CD-E writing system device of the present invention.

FIG. 6 is a flowchart showing a main processing flow at the time of writing data on the host computer 1 side in the first embodiment of the present invention.

FIG. 7 is a flowchart showing a main processing flow at the time of writing data in the second embodiment of the present invention.

FIG. 8 shows a CD-ROM according to the third embodiment of the present invention.
7 is a flowchart showing a main processing flow at the time of writing data on the E writing device side.

FIG. 9 shows a CD-ROM according to the third embodiment of the present invention.
7 is a flowchart showing a main processing flow at the time of writing data on the E writing device side.

FIG. 10 is a flowchart showing a main processing flow at the time of writing data on the host computer 1 side in the third embodiment of the invention.

FIG. 11 is a diagram conceptually showing a file and directory structure defined by the international standard ISO 9660.

FIG. 12 is a diagram illustrating the format of a CD-E disc.

FIG. 13 is a diagram illustrating the format of a multi-session CD-E disc.

FIG. 14 is an external view showing an example of connection of a conventional CD-E writing system device.

FIG. 15 is a functional block diagram showing an example of a main configuration of a CD player.

[Explanation of symbols]

21 CPU 22 ROM 23 RAM 24 Host I / F circuit 25 buffer memory 26 CIRC encoder 27 CIRC decoder 28 EFM demodulation circuit 29 EFM modulation circuit 30 LD controller 31 amplifier 32 optical pickup 33 First-stage amplifier 34 AGC circuit 35 PLL circuit 36 focus servo circuit 37 seek servo circuit 38 Tracking servo circuit 39 Spindle servo circuit 40 amp 41 Spindle motor 42 CD-E disc 43 Processor for mechanical control 44 Internal bus 51 CD-E disc 52 Objective lens 53 Polarizing prism 54 Photo Detector 55 LD

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-109205 (JP, A) JP-A-6-223373 (JP, A) JP-A-60-79424 (JP, A) JP-A-6- 314174 (JP, A) JP 57-150053 (JP, A) JP 7-29312 (JP, A) JP 5-113855 (JP, A) JP 61-148678 (JP, A) JP-A-6-338147 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 20/10

Claims (3)

(57) [Claims] 1. A rewritable disc (hereinafter referred to as CD-
CD-E writing device for writing data to the CD-E writing device, and the CD-E writing device connected to the CD-E writing device.
A CD-E writing system device comprising a host computer for constructing a file structure on E, wherein the CD-E writing device is a defect detection means for detecting a defect during writing of user data, and a position of the defect. A system management memory for holding information on the length and length, a recording means for recording the defect information on one or more places in the CD-E where the data is not used, and the recording means already recorded on the CD-E. It is provided with a loading unit for reading the defect information and loading it into the system management memory, and a unit for notifying the host computer of the defect information, wherein the host computer does not use the defect portion in the file system based on the defect information. Has file management structure Means for constructing a file structure so that the write operation existence of the defect is for an unknown track
When a defect is detected in the
That fits within the track length that is located in front of the
To determine if the file is in the data to be recorded.
It fits within the steps and the track length located in front of the defect position.
If there is complete data, that file is
Will be recorded in the detected track and will continue to that file.
Place a track that includes the defect position, and
Write dummy data to the track
Continue recording remaining user data on containing tracks
A CD-E writing system device comprising: a means for arranging tracks . 2. The CD-E writing system device according to claim 1, wherein when the CD-E writing device receives a write command from a host computer, the writing position includes a CD-E writing position.
A CD-E writing device comprising means for notifying an error to a host computer when a write command is issued to a portion on E. 3. The CD-E writing system device according to claim 1, wherein when a defect is detected during a write operation on a track with an unknown presence or absence of a defect, the track length is located in front of the defect position of the track. A means for determining whether or not there is data that fits, and when there is data that fits within the track length that is located ahead of the defect position, relocates the track that fits the data and continues to the relocated track. Means for arranging a track containing a position, and arranging a track containing the user data remaining after the track containing the defect, the CD-E writing system device.