JP2005166082A - Information recording and reproducing device, information recording and reproducing method, program and computer readable recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine that the information recording medium is under the write of data even when the write of the data is interrupted owing to power interruption or the like during the write of the data to the information recording medium. <P>SOLUTION: A CPU writes a flag indicating that it is executing the write of user data at a prescribed position of an optical disk before writing the data to the optical disk (S1), writes the user data to the optical disk (S2), and after the write is ended, updates a management table (management information for managing a position at which the data are written and a position at which the data are not written on the optical disk) recorded in the optical disk (S3), rewrites the flag indicating that it is executing the write of the data written at the prescribed position of the optical disk to a flag indicating the write completion of the data after the updating (S4), and ends the processing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hard disk device for reading and writing data to an information recording medium capable of rewriting data, such as a hard disk, a magneto-optical disk, a CD-RW disk, a DVD + RW disk, a DVD-RW disk, a DVD-RAM disk, etc. Information recording / reproducing apparatus such as magnetic disk apparatus, optical disk apparatus, etc., information recording / reproducing method for reading and writing data on the information recording medium as described above, and program for causing a computer to execute the procedure of the information recording / reproducing method And a computer-readable recording medium on which the program is recorded.

For example, in order to make a data rewritable information recording medium (optical disc) such as a CD-RW (Compact Disc Re-Writable) disc and a DVD + RW (DVD + Re-Writable) disc usable at random access, first format the disc. Need to do.
The format is a process in which specific pattern data is written and filled in a blank area of the information recording medium to detect a defect in the recording area of the information recording medium.
However, since it takes time to write specific pattern data in the entire blank area of the information recording medium, it has been necessary to wait for a long time before it can be used.
Therefore, recently, a process called a background format has been performed.

The background format is a format process in which only the minimum necessary part of the recording area is written and the formatting process is temporarily terminated and the entire blank area of the information recording medium is filled with specific pattern data. This method is performed when there is no access to the recording medium.
By this background format, the formatting process of the information recording medium is finished instantly in appearance, and the user can use the information recording medium immediately.
In the background format, when the user writes data (user data) during formatting in the background, the formatting process is interrupted.
Since the user data written at that time can be written at an arbitrary position on the information recording medium, it may be written at a position on the information recording medium where the formatting process has not been completed.

Therefore, when the background formatting process is resumed after the user data is recorded, the formatting process must not destroy the user data.
Therefore, for example, in a DVD + RW disc which is an example of an information recording medium, a management table called a bitmap is recorded at a predetermined position on the disc, and the user data is not destroyed by the formatting process with reference to the management table. .
The bit map is a management information on whether data is written or not written in units of 1 ECC block in the recording area of the DVD + RW disc in a table format, and is retained on the DVD + RW disc until the formatting is completed. At the time of formatting, the format can be restarted from a position where data is not written with reference to this bitmap.

By the way, CD-RW discs and DVD + RW discs have a limited number of rewritable times for which the data recording quality is guaranteed. Therefore, if the bitmap is frequently updated, the number of times that the data can be rewritten is reached immediately. The recording position of the bitmap is deteriorated.
Therefore, if the management information such as the above bitmap is not frequently updated, if the data recording process is interrupted due to a power failure of the optical disk device or the like before the bitmap is updated, There is a risk of losing data because it is not known whether or not the writing was in progress.
2. Description of the Related Art Conventionally, when a power supply is unexpectedly interrupted during real-time recording, an information recording / reproducing apparatus (for example, refer to Patent Document 1) that stores in a nonvolatile memory in which state the power supply is interrupted during real-time recording. there were.
JP 2001-266696 A

However, the conventional information recording / reproducing apparatus has a problem that the manufacturing cost of the apparatus increases because it is necessary to provide a dedicated non-volatile memory for storing the state when the power is turned off. In the case of an exchangeable information recording medium, if the information recording medium is taken out from the information recording / reproducing apparatus while the power is turned off, it becomes impossible to know whether data is being recorded on the information recording medium. There was a problem that there was a risk of losing.
The present invention has been made in view of the above points, and even if data writing is interrupted due to a power interruption or the like during data writing to the information recording medium, the information recording medium is still writing data. The purpose is to make it possible to determine this.

In order to achieve the above object, the present invention provides the following information recording / reproducing apparatus (1) to (5).
(1) Data reading means for reading and writing data to / from an information recording medium capable of rewriting data, and management for managing a position where data is written and a position where data is not written on the information recording medium In an information recording / reproducing apparatus comprising management information writing means for writing information to the information recording medium, identification information indicating that data is being written is written to the information recording medium before the data reading means writes data to the information recording medium. Identification information writing means for writing in a predetermined position, management information updating means for updating the management information after data writing by the data reading means, and after updating the management information by the management information updating means Writes identification information indicating that data is being written at a predetermined position on the information recording medium. Information recording and reproducing apparatus provided with the identification information rewriting means for rewriting the identification information indicating completion.

(2) Data reading means for reading and writing data to / from an information recording medium capable of rewriting data, and management for managing a position where data is written and a position where data is not written on the information recording medium In an information recording / reproducing apparatus comprising management information writing means for writing information to the information recording medium, identification information indicating that data is being written is written to the information recording medium before the data reading means writes data to the information recording medium. Identification information writing means for writing to a predetermined position, management information updating means for updating the management information every time the amount of data written by the data reading means reaches a predetermined amount, and data by the data reading means The data indicating that the data written to the predetermined position of the information recording medium is being written after the writing of the data is finished. Information recording and reproducing apparatus characterized by comprising the identification information rewriting means for rewriting the information in the identification information indicating the completion of the writing of data.

(3) Data reading means for reading and writing data to / from an information recording medium capable of rewriting data, and management for managing a position where data is written and a position where data is not written on the information recording medium In an information recording / reproducing apparatus comprising management information writing means for writing information to the information recording medium, identification information indicating that data is being written is written to the information recording medium before the data reading means writes data to the information recording medium. And a management information for updating the management information when the next data has not been written even after a lapse of a predetermined time from completion of data writing by the data reading means. An update means, and the management information update means updates the management information to a predetermined position on the information recording medium. Information recording and reproducing apparatus provided with the identification information rewriting means for rewriting the identification information indicating that the writing of elaborate come data identification information indicating the completion of the writing of data.

(4) In the information recording / reproducing apparatus according to any one of (1) to (3), when the information recording medium is mounted, the identification information written at a predetermined position of the information recording medium is read and data is being written. Of the information recording medium managed as a position where data is not written in the management information when it is determined as identification information indicating that data is being written. Means for checking whether or not there is data at the corresponding position, and when it is found that there is data, the position where data is not written in the management information while there is data at the corresponding position of the information recording medium Means for updating the managed position to the position where the data is written, and after updating by the means, to the predetermined position of the information recording medium. Information recording and reproducing apparatus having a means for rewriting the identification information indicating that the writing of data being incorporated coming to identification information indicating the completion of the writing of data.

(5) In the information recording / reproducing apparatus according to any one of (1) to (4), the information recording medium is a DVD + RW disc, the management information is a bitmap of a formatting disc control block, and the data is written An information recording / reproducing apparatus in which the identification information indicating the inside is the formatting open bit of the formatting status flag of the formatting disk control block.

The following information recording / reproducing methods (6) to (10) are also provided.
(6) Data reading process for reading and writing data to / from an information recording medium capable of rewriting data, and management for managing a position where data is written and a position where data is not written on the information recording medium Management information writing step for writing information to the information recording medium, and identification information for writing identification information indicating that data is being written to a predetermined position of the information recording medium before the data is written to the information recording medium by the data reading step. A management information updating step for updating the management information after data writing is completed by the data reading step, a data reading step, and a management information updating step for updating the management information to a predetermined position on the information recording medium. Rewrite the identification information indicating that the written data is being written to the identification information indicating the completion of data writing. Information recording and reproducing method comprising the identification information rewriting step.

(7) Management for managing a data reading process for reading and writing data to / from an information recording medium capable of rewriting data, and a position where data is written and a position where data is not written on the information recording medium. Management information writing step for writing information to the information recording medium, and identification information for writing identification information indicating that data is being written to a predetermined position of the information recording medium before the data is written to the information recording medium by the data reading step. A management information update step for updating the management information each time the amount of data written by the data reading step reaches a predetermined amount set in advance, and after the data writing by the data reading step is finished The identification information indicating that data is being written is written at a predetermined position on the information recording medium. Information recording and reproducing method comprising the identification information rewriting step of rewriting the identify information.

(8) Management for managing a data reading process for reading and writing data to and from an information recording medium capable of rewriting data, and a position where data is written and a position where data is not written on the information recording medium. Management information writing step for writing information to the information recording medium, and identification information for writing identification information indicating that data is being written to a predetermined position of the information recording medium before the data is written to the information recording medium by the data reading step. A management information update step for updating the management information when the next data has not been written even after a predetermined time has elapsed since the completion of data writing in the data reading step, and the management information After the management information is updated by an update process, the data written to the predetermined position of the information recording medium is being written. Information recording and reproducing method comprising the identification information rewriting step of rewriting the identify information to the identification information indicating the completion of the writing of data.

(9) In the information recording / reproducing method of any one of (6) to (8), when the information recording medium is mounted, the identification information written at a predetermined position of the information recording medium is read and data is being written. Of the information recording medium managed as a position where data is not written in the management information when it is determined as identification information indicating that data is being written. The process of checking whether or not there is data at the corresponding position, and when it is determined that there is data, the position where the data is not written in the management information while there is data at the corresponding position of the information recording medium A process of updating a managed position to a position where data is written, and after updating by the process, to a predetermined position of the information recording medium Information recording and reproducing method comprising the step of rewriting the identification information indicating that the writing of data being incorporated coming to identification information indicating the completion of the writing of data.

(10) In the information recording / reproducing method of any one of (6) to (9), the information recording medium is a DVD + RW disc, the management information is a bitmap of a formatting disc control block, and the data is written An information recording / reproducing method in which identification information indicating the inside is the formatting open bit of the formatting status flag of the formatting disk control block.

Furthermore, the following programs (11) to (15) are also provided.
(11) A data reading procedure for reading and writing data on an information recording medium capable of rewriting data on a computer, and a position where data is written and a position where data is not written on the information recording medium. Management information writing procedure for writing management information to be managed to the information recording medium, and identification information indicating that data is being written before writing data to the information recording medium by the data reading procedure at a predetermined position of the information recording medium The identification information writing procedure for writing, the management information updating procedure for updating the management information after the data writing is completed by the data reading procedure, and the information recording medium after the management information is updated by the management information updating procedure. Identification information indicating that data is being written at a predetermined position indicates completion of data writing Program for executing the identification information rewriting procedures rewritten to another information.

(12) A data reading procedure for reading and writing data on an information recording medium capable of rewriting data on a computer, and a position where data is written and a position where data is not written on the information recording medium. Management information writing procedure for writing management information to be managed to the information recording medium, and identification information indicating that data is being written before writing data to the information recording medium by the data reading procedure at a predetermined position of the information recording medium The identification information writing procedure to be written, the management information updating procedure to update the management information every time the amount of data written by the data reading procedure reaches a predetermined amount, and the data writing to be completed by the data reading procedure After that, identification information indicating that data is being written at a predetermined position on the information recording medium is displayed. Program for executing the identification information rewriting procedures for rewriting the identification information indicating the completion of writing.

(13) A data reading procedure for reading and writing data to / from an information recording medium capable of rewriting data, and a position where data is written and a position where data is not written on the information recording medium. Management information writing procedure for writing management information to be managed to the information recording medium, and identification information indicating that data is being written before writing data to the information recording medium by the data reading procedure at a predetermined position of the information recording medium An identification information writing procedure for writing, a management information update procedure for updating the management information when the next data has not been written even after a predetermined time has elapsed since the completion of data writing by the data reading procedure, After the management information is updated by the management information update procedure, the data written to the predetermined position on the information recording medium is updated. Program for executing the identification information rewriting procedures for rewriting the identification information indicating that the writing of data to the identification information indicating the completion of the writing of data.

(14) In the program according to any one of (11) to (13), when the information recording medium is mounted on the computer, the identification information written at a predetermined position of the information recording medium is read and data is being written. Of the information recording medium managed as a position where data is not written in the management information when it is determined as identification information indicating that data is being written. The procedure for checking whether or not there is data at the corresponding position, and when it is determined that there is data, the position where the data is not written in the management information while there is data at the corresponding position on the information recording medium The procedure to update the managed location to the location where the data is written, and the information recording after the update by that procedure Program for executing a procedure for rewriting the identification information indicating that the writing of data written in a predetermined position of the body to the identification information indicating the completion of the writing of data.

(15) In any one of the programs (11) to (14), the information recording medium is a DVD + RW disc, the management information is a bitmap of a formatting disc control block, and indicates that the data is being written. A program whose identification information is the formatting open bit of the formatting status flag of the formatting disk control block.
Furthermore, the following (16) computer-readable recording medium is also provided.
(16) A computer-readable recording medium recording the program according to any one of (11) to (15).

  In the information recording / reproducing apparatus and the information recording / reproducing method according to the present invention, even if data writing is interrupted due to a power interruption or the like during data writing to the information recording medium, the information recording medium is still writing data. Can be determined. In addition, the program according to the present invention is used to determine that data is being written to the information recording medium even if the data writing is interrupted due to a power interruption or the like during the data writing to the information recording medium. The procedure can be executed by a computer. Furthermore, the computer-readable recording medium of the present invention was still writing data to the information recording medium even if the data writing was interrupted due to a power interruption or the like during the data writing to the information recording medium. Can be introduced into the computer.

Hereinafter, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of an optical disc apparatus which is an embodiment of the information recording / reproducing apparatus of the present invention.
FIG. 2 is a block diagram showing an internal configuration of the optical pickup device shown in FIG.
As shown in FIG. 1, the optical disk apparatus 1 is an information recording / reproducing apparatus such as a CD-RW disk apparatus, a DVD + RW disk apparatus, a DVD-RW disk apparatus, a DVD-RAM disk apparatus, etc., and includes a spindle motor 2 and an optical pickup apparatus. 3, laser control circuit 4, encoder 5, motor driver 6, reproduction signal processing circuit 7, servo controller 8, buffer RAM 9, buffer manager 10, interface 11, ROM 12, RAM 13, and CPU 14. Etc.
Note that the arrows in FIG. 1 indicate the flow of typical signals and information, and do not represent the entire connection relationship of each block.

The optical disk 15 is an information recording medium such as a CD-RW disk, a DVD + RW disk, a DVD-RW disk, a DVD-RAM disk, etc., in which data can be rewritten, and data on the recording area is written at a predetermined position in the recording area. A management table (management information) for managing the recorded positions and positions where data is not written is recorded.
The spindle motor 2 rotationally drives the optical disc 15 at a predetermined rotational speed when writing and reading data.
The optical pickup device 3 emits a laser beam having a wavelength of 660 nm, a semiconductor laser light source (LD), and guides the light beam emitted from the semiconductor laser light source to the recording surface of the optical disk 15 and also returns the returned light beam reflected by the recording surface. An optical system that leads to a predetermined light receiving position, a light receiver that is arranged at the light receiving position and receives a return light beam, and a driving system such as a focusing actuator, a tracking actuator, and a seek motor (all of which are well known and are not shown). Has been. Then, a current (current signal) corresponding to the amount of received light is output from the light receiver to the reproduction signal processing circuit 7.

The optical pickup device 3 is a device for irradiating a recording surface on which a spiral or concentric track of the optical disk 15 is formed with laser light and receiving reflected light from the recording surface.
As shown in FIG. 2 as an example, the optical pickup device 3 includes a light source unit 20, a collimating lens 22, a beam splitter 23, an objective lens 24, two detection lenses 25 and 28, two light receivers 26 and 29, and a reflection. A mirror 27 and a driving system such as a focusing actuator, a tracking actuator, and a seek motor, which are well-known and are not shown, are provided.
The light source unit 20 includes a semiconductor laser light source 21 as a light source that emits laser light having a wavelength of about 660 nm.
In the present embodiment, the maximum intensity emission direction of the light beam of the laser light emitted from the light source unit 20 (hereinafter abbreviated as “light beam”) is defined as the + X direction.

The collimating lens 22 is disposed on the + X side of the light source unit 20 and makes the light beam emitted from the light source unit 20 substantially parallel light.
The reflection mirror 27 is disposed in the vicinity of the collimator lens 22 and reflects a part of the light beam emitted from the light source unit 20 in the −Z direction as a monitor light beam.
The beam splitter 23 is disposed on the + X side of the collimating lens 22 and transmits the light beam that has been made substantially parallel light by the collimating lens 22 as it is.
Further, the beam splitter 23 branches the light beam (return light beam) reflected by the optical disk 15 and incident via the objective lens 24 in the −Z direction.
The objective lens 24 is disposed on the + X side of the beam splitter 23 and condenses the light beam transmitted through the beam splitter 23 on the recording surface of the optical disc 15.

The detection lens 25 is disposed on the −Z side of the beam splitter 23 and condenses the return light beam branched in the −Z direction by the beam splitter 23 on the light receiving surface of the light receiver 26.
As the light receiver 26, for example, a four-divided light receiving element divided into four partial light receiving elements is used as in the case of a normal optical disk device. Here, the Y-axis direction substantially coincides with the track tangential direction on the optical disc 15. Each partial light receiving element of the four-divided light receiving element generates a current signal corresponding to the amount of received light by photoelectric conversion and outputs it to the reproduction signal processing circuit 7.
The detection lens 28 is disposed on the −Z side of the reflection mirror 27 and condenses the monitoring light beam reflected by the reflection mirror 27 in the −Z direction on the light receiving surface of the light receiver 29.

The light receiver 29 generates a current signal corresponding to the amount of received light by photoelectric conversion, and outputs the current signal to the laser control circuit 4 as a power monitor signal.
The optical pickup device 3 further includes a laser diode driver (LD driver) for generating laser light emitted from the semiconductor laser light source 21.
The reproduction signal processing circuit 7 converts a current signal that is an output signal from the optical pickup device 3 into a voltage signal corresponding to the type of the optical disc 15, and based on the voltage signal, a wobble signal, a reproduction signal, a focus error signal, and the like. Detect servo signal of track error signal.
Then, the reproduction signal processing circuit 7 extracts address information, a synchronization signal, and the like from the wobble signal. The address information extracted here is output to the CPU 14, and the synchronization signal is output to the encoder 5.

Further, the reproduction signal processing circuit 7 performs error correction processing or the like on the reproduction signal and then stores it in the buffer RAM 9 via the buffer manager 10.
The servo signal is output from the reproduction signal processing circuit 7 to the servo controller 8.
The reproduction signal processing circuit 7 sets servo parameters (for example, a signal level adjustment gain) corresponding to the type of the optical disk 15 according to an instruction from the CPU 14.
The servo controller 8 generates a control signal for controlling the optical pickup device 3 based on the servo signal and outputs it to the motor driver 6.
The buffer manager 10 manages input / output of data to / from the buffer RAM 9 and notifies the CPU 14 when the accumulated data amount reaches a predetermined value.

The motor driver 6 controls the optical pickup device 3 and the spindle motor 2 based on a control signal from the servo controller 8 and an instruction from the CPU 14.
The encoder 5 takes out data stored in the buffer RAM 9 via the buffer manager 10 based on an instruction from the CPU 14, adds an error correction code, and creates write data to the optical disk 15.
The encoder 5 outputs write data to the laser control circuit 4 in synchronization with the synchronization signal from the reproduction signal processing circuit 7 based on the instruction from the CPU 14.
The laser control circuit 4 controls the output of the laser light from the optical pickup device 3 based on the write data from the encoder 5. That is, the laser control circuit 4 drives and controls the LD driver.

The interface 11 is a bi-directional communication interface with a host computer such as a personal computer, for example, and conforms to a standard interface such as AT (AT Attachment Packet Interface: ATAPI) or Skazy (Small Computer System Interface: SCSI). .
The ROM 12 is a non-volatile memory, for example, a flash memory that can be written to and read from the CPU 14 and that retains the recorded contents even when the power is turned off. Various control programs including a program according to the present invention, which will be described later, described in possible codes are stored.
The CPU 14 controls the operation of each unit according to the control program stored in the ROM 12 and temporarily stores data necessary for control in the RAM 13. When the optical disk device 1 is powered on, the control program stored in the ROM 12 is loaded into the main memory (not shown) of the CPU 14 and the procedure is executed.

The optical disc apparatus 1 stores the program according to the invention described in (11) in the ROM 12, and the CPU 14 executes the program to record the information according to the invention described in (6). The reproducing method is executed, and the functions of the respective means of the information recording / reproducing apparatus according to the present invention described in (1) above are fulfilled.
Further, by storing the program according to the present invention described in (12) in the ROM 12, the CPU 14 executes the program to execute the information recording / reproducing method according to the present invention described in (7). The function of each means of the information recording / reproducing apparatus according to the present invention described in (2) above is achieved.
Furthermore, by storing the program according to the present invention described in (13) in the ROM 12, the CPU 14 executes the program to execute the information recording / reproducing method according to the present invention described in (8). The function of each means of the information recording / reproducing apparatus according to the present invention described in (3) above is achieved.

Further, by storing the program according to the present invention described in (14) in the ROM 12, the CPU 14 executes the program to execute the information recording / reproducing method according to the present invention described in (9). The function of each means of the information recording / reproducing apparatus according to the present invention described in (4) above is achieved.
Further, by storing the program according to the present invention described in (15) in the ROM 12, the CPU 14 executes the program to execute the information recording / reproducing method according to the present invention described in (10). The function of each means of the information recording / reproducing apparatus according to the present invention described in the above (5) is fulfilled.

  Further, by storing the programs (11) to (15) in a computer-readable recording medium such as a magneto-optical disk, an optical disk (CD-RW disk, DVD + RW disk, DVD-RW disk, DVD-RAM disk). The optical disc apparatus 1 reads the program and stores it in the ROM 12 so that the CPU 14 can execute it, thereby causing the optical disc apparatus 1 to realize the functions of the information recording / reproducing apparatus described in (1) to (5) above. be able to.

Next, a process for writing user data on the optical disk 15 of the optical disk apparatus 1 will be described.
FIG. 3 is a flowchart showing user data writing processing (user data recording processing) in the optical disc apparatus shown in FIG.
The processing described in this flowchart is executed by the CPU 14 in accordance with a control program (the program (11)) stored in the ROM 12.
The CPU 14 writes a flag (identification information) indicating that user data (data) is being written at a predetermined position on the optical disk before writing data on the optical disk in step (indicated by “S” in FIG. 1). Write user data to.

After the completion of the writing, the management table (management information for managing the position where data is written and the position where data is not written) recorded on the optical disk is updated in step 3.
After the update, the flag indicating that data is being written at a predetermined position on the optical disk in step 4 is rewritten to a flag (identification information) indicating completion of data writing, and this process is terminated.
The update process is a process of rewriting the information on the position managed as the position where the data is not written before the recording by the recording of the user data to the information on the position where the data is written.

FIG. 4 is an explanatory diagram showing an example of the format of the management table recorded on the optical disc.
For example, as shown in FIG. 5A, the user data recording area for recording user data on the optical disc is divided into a first area to a sixth area, and the first area, the second area, and the third area. , User data is written in each of the sixth areas (described as “data present” in the drawing), and user data is not yet written in the fourth and fifth areas (“ In the case of “no data”, a management table having a format as shown in FIG. 5B is recorded in a predetermined area of the optical disc. The management table stores a flag indicating that each of the first to sixth areas corresponds to a position where data is written and a flag indicating that the data corresponds to a position where data is not written. The presence or absence of data in each area can be identified. In this case, on the management table, the flag indicating the presence of data is set to “0”, and the flag indicating the absence of data is set to “1”.

  In this way, when a power interruption occurs while writing user data to the optical disk, a flag indicating that data is being written is recorded at a predetermined position on the optical disk. When writing, it is possible to know that user data is written at a position managed as a position where user data is not written in the management table based on the flag, and other user data is added to the user data. It can be used for processing to prevent overwriting and erasing.

Next, another user data writing process in the optical disc apparatus 1 will be described.
In the above-described user data writing process, the management table is updated every time user data has been written to the optical disc. Therefore, when a plurality of units of user data are written successively one after another, the recording of all user data is completed. Processing time may increase, and the number of times of writing by updating the area in which the management table has been written increases, which may cause the area to deteriorate sooner.
Therefore, it is preferable to perform the management table update process every time a predetermined amount of user data is recorded.

FIG. 5 is a flowchart showing another user data writing process (user data recording process) in the optical disc apparatus shown in FIG.
The processing described in this flowchart is executed by the CPU 14 in accordance with a control program (program (12) above) stored in the ROM 12.
The CPU 14 writes a flag (identification information) indicating that user data (data) is being written to a predetermined position on the optical disk before writing data on the optical disk in step (indicated by “S” in FIG. 11). Write user data to.

  After the writing is completed, it is determined in step 13 whether or not a predetermined amount of user data set in advance on the optical disc has been written. In this determination processing, the predetermined amount of value is stored in advance in the ROM 12 or the RAM 13, and the amount of writing is counted each time user data is written on the same optical disk, and the count value is stored in the RAM 13, for example. Thus, the predetermined value and the count value are compared, and when the count value matches the predetermined value, it is determined that a predetermined amount of user data set in advance on the optical disc has been written.

  If it is determined in step 13 that a predetermined amount of user data set in advance on the optical disk has been written, the management table recorded on the optical disk in step 14 (the position where data on the optical disk is written and the position where data is not written) Management information) is updated, and it is determined in step 15 whether or not there has been a request for writing new user data from the host computer. If there is, a return is made to step 12 to repeat the above processing. If it is determined in step 13 that a predetermined amount of user data set in advance on the optical disk has not been written, it is determined in step 15 whether a new user data write request has been received from the host computer. It returns to step 12 and repeats the above-mentioned processing. In other words, the management table is updated every time the amount of user data written on the optical disc 15 reaches a predetermined amount in the processes of steps 12 to 15.

If there is no new user data write request from the host computer in step 15, whether or not there is a user data write end request from the host computer in step 16, or a disk ejection request is issued from the host computer or a user operation instruction to the optical disk device. If there is no request, the process returns to step 15 to repeat the above processing. If there is any request in the determination in step 16, the management table is updated in step 17 (this update process is the same as the above update process). The flag indicating that data is being written at a predetermined position is rewritten to a flag (identification information) indicating completion of data writing, and this process is terminated.
The predetermined amount may be determined on the basis of the amount of time during which overhead due to updating of the management table is reduced compared to the user data write time. As a specific example, if it takes 1 second to update the management table, the data amount corresponds to a user data write time of 30 seconds.

  In this way, the management table is updated each time the amount of user data written to the optical disc 15 reaches a predetermined amount, so that the writing frequency for updating the management table is reduced and the speed of the user data recording process is reduced. The decrease can be prevented, and further, the area where the management table is recorded can be prevented from being deteriorated by frequently rewriting the management table.

Next, another user data writing process in the optical disc apparatus 1 will be described.
In order to reduce the frequency of updating (rewriting) of the management table, the management table updating process may be performed when a predetermined time has elapsed after the writing of user data is completed.
FIG. 6 is a flowchart showing still another user data writing process (user data recording process) in the optical disc apparatus shown in FIG.
The processing described in this flowchart is executed by the CPU 14 in accordance with a control program (the program (13)) stored in the ROM 12.

The CPU 14 writes a flag (identification information) indicating that user data (data) is being written to a predetermined position on the optical disk before writing data on the optical disk in step (indicated by “S” in the figure) 21, and in step 22 the optical disk. Write user data to.
In step 23, it is determined whether or not there is a next user data write request from the host computer, and if there is, the process returns to step 22 to perform user data write processing in accordance with the write request. If it is determined in step 23 that there is no user data write request, it is determined in step 24 whether or not the management table has been updated. If it has been updated, the process returns to step 23; It is determined whether or not a predetermined time has elapsed since the end of writing. This predetermined time corresponds to the time when the next user data is not written since the end of writing the user data. That is, it is a time when it is determined that the continuous writing process of user data is interrupted. Although the time varies depending on the system, as an example, if it is set to 10 seconds (this set value may be stored in the ROM 12 and referred to by the CPU 14, for example), after the user data has been written, When 10 seconds have elapsed, the management table is updated.

If it is determined in step 25 that the predetermined time has not elapsed since the end of user data writing, it is determined again in step 23 whether or not there is a user data write request. Update the management table with.
That is, the contents of the management table on the optical disk are updated when the next user data is not written even after a predetermined time has elapsed since the completion of the writing of user data to the optical disk in the processing of steps 23 to 26 described above. . After the update, the flag indicating that data is being written at a predetermined position on the optical disk in step 27 is rewritten with a flag (identification information) indicating completion of data writing, and the process returns to step 23.
In this way, if the next user data is not written even after a lapse of a predetermined time since the user data is written on the optical disc 15, the management table is updated at that time, so the writing frequency for updating the management table is high. Thus, it is possible to prevent a reduction in the speed of the user data recording process, and it is possible to prevent the area in which the management table is recorded from being deteriorated by frequently rewriting the management table.

Next, even if the recording of user data is terminated in the middle due to a power interruption or the like by the above processing, a flag indicating that user data is being written is recorded on the optical disc. It is possible to prevent overwriting of the recorded user data by referring to the flag when recording, but where the user data is registered in the management table as a position where no user data is written. I do not know if there is.
Therefore, when the optical disc is mounted, the management table may be updated so as to match the recording status of user data on the optical disc.
This mounting process is an internal process of the optical disk apparatus 1 from when the optical disk 15 is inserted into the optical disk apparatus 1 to read information on the optical disk 15 until the user can read and write.

FIG. 7 is a flowchart showing an optical disc mounting process in the optical disc apparatus shown in FIG.
The processing described in this flowchart is executed by the CPU 14 in accordance with a control program (program (14) above) stored in the ROM 12.
When the optical disk is mounted, the CPU 14 reads a flag written at a predetermined position on the optical disk in step (indicated by “S” in the figure) 31, and whether or not the flag indicates that user data is being written in step 32. If it is determined that the flag indicates that user data is being written, it is checked in step 33 whether there is user data at the corresponding position of the optical disc managed as a position where user data is not written in the management table. Do (examine).

In step 34, it is determined whether or not user data is detected based on the result of the check. If not detected, the process proceeds to step 36. If detected, the management table is updated in step 35. That is, in the processing of steps 32 to 35, the position managed as the position where data is not written in the management table while the data exists at the corresponding position on the optical disk is updated to the position where the data is written. After the update, in step 36, the flag indicating that data is being written at a predetermined position on the optical disk is rewritten with a flag (identification information) indicating completion of data writing, and this mounting process is terminated.
On the other hand, if it is determined in step 32 that the flag read from the predetermined position is a flag indicating completion of user data writing and is not a flag indicating that user data is being written, the mount processing is terminated.

  In this way, even if the power is cut off while writing user data to the optical disc, the management table is automatically updated to the correct information at the next mounting, so the user who is recording is based on the contents of the management table. Data can be recovered, and user data can be written while the contents of the management table are interrupted when writing is interrupted, whereby it is possible to prevent accidental overwriting of already recorded user data.

Next, when the optical disk 15 is a DVD + RW disk and the optical disk apparatus 1 is an apparatus capable of accessing the DVD + RW disk, the user data recording process and the mounting process will be described.
First, a DVD + RW disc will be described.
FIG. 8 is a diagram showing the format of the recording area of the DVD + RW disc.
FIG. 9 is a diagram showing the format of the FDCB in the inner disc identification zone shown in FIG.
FIG. 10 is a diagram showing a format of an area for recording a formatting status and mode in the FDCB shown in FIG.

As shown in FIG. 8, the recording area of the DVD + RW disc includes a lead-in area, a data area, and a lead-out area (in the same figure) from the inner circumference side to the outer circumference side of the disc. Are not shown).
There is an FDCB in the format shown in FIG. 9 in the inner disk identification zone of the lead-in area, and an area for recording the formatting status and mode in the FDCB is set with the above flag. Assign to a predetermined position to write.

Then, as shown in FIG. 10, in the formatting open of bit 5 in the formatting status and mode, a flag indicating that the user data is being written and the user data Write (record) a flag value indicating completion of writing.
That is, if formatting / opening = 1 is recorded, it indicates that the information of the DVD + RW disc is not reflected in the FDCB, and that the DVD + RW disc is writing user data.
On the other hand, if Formatting Open = 0 is recorded, it indicates that the information of the DVD + RW disc is reflected in the FDCB, and the DVD + RW disc indicates the completion of writing of user data.

Next, a formatting bitmap in the FDCB shown in FIG. 9 is assigned to an area for recording a management table that is a table for managing the write position. The leading address of the formatting bitmap is recorded at a bitmap start address in the FDCB.
One bit of the formatting bitmap corresponds to one ECC block. When the value of the one bit is “1”, it indicates that nothing is recorded in the corresponding ECC block on the DVD + RW disc. On the other hand, “0” indicates that data is recorded in the corresponding ECC block on the DVD + RW disc.
That is, no user data is written at the corresponding position on the DVD + RW disc corresponding to the position of the ECC block in which “1” is recorded in the formatting bitmap. On the other hand, user data is written at a corresponding position on the DVD + RW disc corresponding to the position of the ECC block in which “0” is recorded in the formatting bitmap.

Next, the user data writing process shown in FIG. 3 will be described in the case where the optical disk 15 is a DVD + RW disk and a predetermined position for recording a flag and a management table are assigned as described above.
Step 1: When the CPU 14 receives a user data write request from the host computer, each block (servo controller 8 or encoder) in the optical disc apparatus 1 is set so that the formatting open value in the FDCB of the DVD + RW disc is set to “1”. 5) etc. As a result, the value of formatting / opening in the FDCB of the DVD + RW disc is set to “1”.

Step 2: In accordance with a user data write request from the host computer, the CPU 14 issues a command to each block in the optical disc apparatus 1 to write (record) the user data in the designated data area in the DVD + RW disc. . And CPU14 memorize | stores the information regarding the ECC block which recorded user data in RAM13.
Step 3: After writing (recording) the user data, the CPU 14 updates the contents of the formatting bitmap in the FDCB, which is the management table, according to the information regarding the ECC block stored in the RAM 13.
Step 4: The CPU 14 gives a command to each block (servo controller 8, encoder 5, etc.) in the optical disc apparatus 1 so as to set the formatting open value in the FDCB to “0”. As a result, the formatting open value of the DVD + RW disc is set to “0”.

Next, the user data writing process shown in FIG. 5 will be described when the optical disk 15 is a DVD + RW disk and a predetermined position for recording a flag and a management table are assigned as described above.
Step 11: Upon receiving a user data write request from the host computer, the CPU 14 sets each block (servo controller 8 and encoder) in the optical disc apparatus 1 so as to set the formatting open value in the FDCB of the DVD + RW disc to “1”. 5) etc. As a result, the value of formatting / opening in the FDCB of the DVD + RW disc is set to “1”.

Step 12: In response to a user data write request from the host computer, the CPU 14 issues a command to each block in the optical disc apparatus 1 to write (record) the user data in the designated data area in the DVD + RW disc. . And CPU14 memorize | stores the information regarding the ECC block which recorded user data in RAM13.
Step 13: The CPU 14 corresponds to a predetermined amount of user data on the DVD + RW disc, for example, a data amount requiring “30” when the management table is updated to “1”, or 5% of the total capacity of the DVD + RW disc. It is determined whether or not such a data amount has been recorded. If not recorded, the process proceeds to step 15; if recorded, the process proceeds to step 14.

Step 14: The CPU 14 updates the management table recorded on the DVD + RW disc, and enters a state of waiting for a command from the host computer.
Step 15: The CPU 14 determines whether or not a user data write request has been received from the host computer. If it is received, the process proceeds to step 15; otherwise, the process proceeds to step 16.
Step 16: The CPU 14 determines whether or not there has been a user data write end request from the host computer, and whether or not there has been a disk ejection request from the host computer or in response to a user operation instruction to the optical disk apparatus. If there is no request, the process returns to step 15. If there is any request, the process proceeds to step 17.

Step 17: The CPU 14 updates the contents of the formatting bitmap in the FDCB, which is the management table, according to the information regarding the ECC block stored in the RAM 13.
Step 18: The CPU 14 gives a command to each block (servo controller 8, encoder 5, etc.) in the optical disc apparatus 1 so as to set the value of formatting / opening in the FDCB to “0”. As a result, the formatting open value of the DVD + RW disc is set to “0”.

Next, the user data writing process shown in FIG. 6 will be described when the optical disk 15 is a DVD + RW disk and a predetermined position for recording a flag and a management table are assigned as described above.
Step 21: When the CPU 14 receives a user data write request from the host computer, each block (servo controller 8 or encoder) in the optical disk apparatus 1 is set so that the formatting open value in the FDCB of the DVD + RW disk is set to “1”. 5) etc. As a result, the value of formatting / opening in the FDCB of the DVD + RW disc is set to “1”.

Step 22: The CPU 14 issues a command to each block in the optical disc apparatus 1 so as to write (record) the user data in the designated data area in the DVD + RW disc in accordance with the user data write request from the host computer. . And CPU14 memorize | stores the information regarding the ECC block which recorded user data in RAM13.
Step 23: The CPU 14 determines whether or not a user data write request has been received from the host computer. If it is received, the process returns to step 22; otherwise, the process proceeds to step 24.

Step 24: The CPU 14 determines whether or not the formatting bitmap (management table) in the FDCB has been updated by reading the contents of formatting open in the FDCB. If the value of the formatting open is “1”, no update has been performed, and if “0”, the update has been performed. If it has been updated, the process returns to step 23, and if not updated, the process proceeds to step 25.
Step 25: The CPU 14 determines whether or not a predetermined time (for example, 10 seconds) has elapsed since the end of the writing of user data. Here, it is determined whether or not user data is not written for a predetermined time. If the predetermined time has not elapsed, the process returns to step 23, and if the predetermined time has elapsed, the process proceeds to step 26.

Step 26: The CPU 14 updates the contents of the formatting bitmap in the FDCB, which is the management table, according to the information regarding the ECC block stored in the RAM 13.
Step 27: The CPU 14 gives a command to each block (servo controller 8, encoder 5, etc.) in the optical disc apparatus 1 so as to set the value of formatting / opening in the FDCB to “0”. As a result, the formatting open value of the DVD + RW disc is set to “0”.
When there is no user data write request for a long time, or when a recording end command or a disc ejection command is received, the management table is updated and a flag indicating that user data is being written is returned (formatting in the FDCB). The open value may be set to “0”).

Next, the user data writing process shown in FIG. 7 will be described in the case where the optical disk 15 is a DVD + RW disk and a predetermined position for recording a flag and a management table are assigned as described above.
This mounting process checks whether the power is shut off while user data is being written after mounting the DVD + RW disc. If the power is shut off, the presence of data at a location not registered in the management table is checked. If there is data at a position not registered in the management table, it is a process of updating.

The CPU 14 performs a known mounting process such as focus pull-in and track pull-in.
Step 31: The CPU 14 gives a command to each block (servo controller 8, encoder 5, etc.) of the optical disc apparatus 1 so as to read the value of formatting / opening in the FDCB of the DVD + RW disc. As a result, the CPU 14 reads the formatting / opening value and stores it in, for example, the RAM 13.
Step 32: The CPU 14 determines whether the read formatting / open value is “0” or “1”. When the value of the formatting / opening is “1”, it can be seen that user data is being written, that is, a trouble such as a power interruption has occurred during the writing of user data. On the other hand, when the value of the formatting open is “0”, it can be seen that the writing of user data is completed (finished) and the formatting bitmap (management table) in the FDCB has been updated.

If the value of formatting / opening is “1”, the process proceeds to step 33, and if the value of formatting / opening is “0”, the mounting process is terminated.
Step 33: The CPU 14 reads the formatting bitmap in the FDCB that is the management table, and the ECC corresponding to the position that is not registered in the formatting bitmap (that is, the formatting bitmap that is “1”). The presence of user data at the corresponding position of the DVD + RW disc corresponding to (block) is checked.
Step 34: The CPU 14 determines whether or not user data is detected by the above check. If detected, the CPU 14 stores information on the ECC block in the RAM 13 and proceeds to step 35. On the other hand, if not detected, the process proceeds to step 36.

Step 35: The CPU 14 records “0” in the formatting bitmap corresponding to all the ECC blocks in which user data is detected in step 34, and updates the contents of the formatting bitmap that is the management table.
Step 36: After updating the formatting bitmap, the CPU 14 rewrites the formatting open value in the FDCB to “0”, and ends this mounting process.

  The present invention is not limited to what is applied to a DVD + RW compatible device, and all information recording media provided with a “flag indicating that user data is being written” and a “table for managing writing position” The present invention can be applied to a recording apparatus that records information.

  The information recording / reproducing apparatus, information recording / reproducing method, program, and computer-readable recording medium according to the present invention can also be applied to a magneto-optical disk apparatus, or a personal computer such as a desktop personal computer or notebook personal computer.

1 is a block diagram showing a schematic configuration of an optical disc apparatus which is an embodiment of an information recording / reproducing apparatus of the present invention. It is a block diagram which shows the internal structure of the optical pick-up apparatus shown in FIG. FIG. 3 is a flowchart showing user data writing processing in the optical disc apparatus shown in FIG. 1. It is explanatory drawing which shows an example of the format of the management table recorded on the optical disk shown in FIG. FIG. 10 is a flowchart showing another user data writing process in the optical disc apparatus shown in FIG. 1.

FIG. 10 is a flowchart showing still another user data writing process in the optical disc apparatus shown in FIG. 1. It is a flowchart figure which shows the mounting process of the optical disk in the optical disk apparatus shown in FIG. It is a figure which shows the format of the recording area of a DVD + RW disc. It is a figure which shows the format of FDCB in the inner disk identification zone shown in FIG. FIG. 10 is a diagram showing a format of an area for recording formatting status and mode in the FDCB shown in FIG. 9.

Explanation of symbols

1: optical disk device 2: spindle motor 3: optical pickup device 4: laser control circuit 5: encoder 6: motor driver 7: reproduction signal processing circuit 8: servo controller 9: buffer RAM 10: buffer manager 11: interface 12: ROM 13 : RAM 14: CPU 15: Optical disk 20: Light source unit 21: Semiconductor laser light source 22: Collimator lens 23: Beam splitter 24: Objective lens 25 and 28: Detection lens 26 and 29: Light receiver 27: Reflection mirror

Claims (16)

Data reading means for reading and writing data with respect to an information recording medium capable of rewriting data, and management information for managing a position where data is written and a position where data is not written on the information recording medium In an information recording / reproducing apparatus comprising management information writing means for writing to an information recording medium,
Before writing data to the information recording medium by the data reading means, identification information writing means for writing identification information indicating that data is being written to a predetermined position of the information recording medium, and writing of data by the data reading means is terminated. Management information updating means for updating the management information after the completion of data writing, and identification information indicating that data written to a predetermined position of the information recording medium is being written after the management information is updated by the management information updating means. An information recording / reproducing apparatus comprising: identification information rewriting means for rewriting identification information indicating Data reading means for reading and writing data with respect to an information recording medium capable of rewriting data, and management information for managing a position where data is written and a position where data is not written on the information recording medium In an information recording / reproducing apparatus comprising management information writing means for writing to an information recording medium,
An identification information writing means for writing identification information indicating that data is being written to a predetermined position of the information recording medium before writing data to the information recording medium by the data reading means; and an amount of data written by the data reading means Indicates that the management information updating means for updating the management information each time the value reaches a predetermined amount, and that data written to a predetermined position of the information recording medium after the data reading means finishes writing data is being written An information recording / reproducing apparatus comprising: identification information rewriting means for rewriting identification information with identification information indicating completion of data writing. Data reading means for reading and writing data with respect to an information recording medium capable of rewriting data, and management information for managing a position where data is written and a position where data is not written on the information recording medium In an information recording / reproducing apparatus comprising management information writing means for writing to an information recording medium,
Before writing data to the information recording medium by the data reading means, identification information writing means for writing identification information indicating that data is being written to a predetermined position of the information recording medium, and writing of data by the data reading means is terminated. Management information updating means for updating the management information when the next data is not written even after a predetermined time has elapsed, and after the management information is updated by the management information updating means, An information recording / reproducing apparatus comprising: identification information rewriting means for rewriting identification information indicating that data written at a predetermined position is being written into identification information indicating completion of data writing. The information recording / reproducing apparatus according to any one of claims 1 to 3,
Means for reading the identification information written at a predetermined position of the information recording medium at the time of mounting the information recording medium to determine whether or not the identification information indicates that data is being written; Means for checking whether or not there is data at a corresponding position of the information recording medium managed as a position where data is not written in the management information when it is determined that the identification information is indicated; Means for updating a position managed as a position where no data is written in the management information to a position where the data is written, while the data exists in the corresponding position of the information recording medium. After completion of the data writing, the identification information indicating that the data written in the predetermined position of the information recording medium is being written is completely written. Information recording and reproducing apparatus characterized by comprising a means for rewriting the identification information indicating. The information recording / reproducing apparatus according to any one of claims 1 to 4,
The information recording medium is a DVD + RW disc, the management information is a bitmap of a formatting disc control block, and identification information indicating that the data is being written is the formatting status flag of the formatting disc control block. An information recording / reproducing apparatus characterized by being an open bit.   Data reading process for reading and writing data with respect to an information recording medium capable of rewriting data, and management information for managing a position where data is written and a position where data is not written on the information recording medium Management information writing step for writing to an information recording medium, and identification information writing step for writing identification information indicating that data is being written to a predetermined position of the information recording medium before writing data to the information recording medium by the data reading step. And a management information update step for updating the management information after data writing is completed by the data reading step, and data written at a predetermined position on the information recording medium after the management information is updated by the management information update step. Identification information that rewrites identification information indicating that data is being written into identification information that indicates completion of data writing Information recording and reproducing method characterized by comprising a rewriting process.   Data reading process for reading and writing data with respect to an information recording medium capable of rewriting data, and management information for managing a position where data is written and a position where data is not written on the information recording medium Management information writing step for writing to an information recording medium, and identification information writing step for writing identification information indicating that data is being written to a predetermined position of the information recording medium before writing data to the information recording medium by the data reading step. A management information update step for updating the management information every time the amount of data written in the data reading step reaches a predetermined amount, and the information recording medium after the data writing is finished in the data reading step Identification information indicating that data is being written at a predetermined position of Information recording and reproducing method characterized by comprising the identification information rewriting step of rewriting the information.   Data reading process for reading and writing data with respect to an information recording medium capable of rewriting data, and management information for managing a position where data is written and a position where data is not written on the information recording medium Management information writing step for writing to an information recording medium, and identification information writing step for writing identification information indicating that data is being written to a predetermined position of the information recording medium before writing data to the information recording medium by the data reading step. A management information update step for updating the management information when the next data has not been written even if a predetermined time has elapsed after the data writing by the data reading step, and the management information updating step. Identification indicating that data written to a predetermined position of the information recording medium after the management information is updated is being written Information recording and reproducing method characterized by comprising the identification information rewriting step of rewriting the broadcast identification information indicating the completion of the writing of data.   9. The information recording / reproducing method according to claim 6, wherein when the information recording medium is mounted, identification information written at a predetermined position of the information recording medium is read to indicate that data is being written. A step of determining whether the information is identification information, and a corresponding position of the information recording medium managed as a position where data is not written in the management information when it is determined as identification information indicating that data is being written by the step A process for checking whether or not there is data, and when it is determined that there is data, the management information is managed as a position where data is not written in the management information while there is data in the corresponding position of the information recording medium. Updating the current position to the position where the data is written, and writing to the predetermined position of the information recording medium after the update by the process Information recording and reproducing method characterized by comprising a step of rewriting the identification information indicating identification information indicating that the writing of data is a completion of the writing of data.   10. The information recording / reproducing method according to claim 6, wherein the information recording medium is a DVD + RW disc, the management information is a bitmap of a formatting disc control block, and the data is being written. The information recording / reproducing method characterized in that the identification information to be displayed is a formatting open bit of the formatting status flag of the formatting disk control block.   Management for managing a data reading / writing procedure for reading and writing data to / from a data rewritable information recording medium and a position where data is written and a position where data is not written on the information recording medium. Management information writing procedure for writing information to the information recording medium, and identification information for writing identification information indicating that data is being written to the information recording medium before writing data to the information recording medium by the data reading procedure. A write procedure, a management information update procedure for updating the management information after the data writing is completed by the data reading procedure, and a management information update procedure after updating the management information by the management information update procedure. The identification information indicating that the written data is being written is changed to the identification information indicating the completion of data writing. Program for executing the identification information rewriting procedures replace come.   Management for managing a data reading / writing procedure for reading and writing data to / from a data rewritable information recording medium and a position where data is written and a position where data is not written on the information recording medium. Management information writing procedure for writing information to the information recording medium, and identification information for writing identification information indicating that data is being written to the information recording medium before writing data to the information recording medium by the data reading procedure. A writing procedure, a management information update procedure for updating the management information each time the amount of data written by the data reading procedure reaches a predetermined amount, and after the writing of data by the data reading procedure is finished Identification information indicating that data is being written at a predetermined position on the information recording medium Program for executing the identification information rewriting procedures for rewriting the identification information indicating incomplete.   Management for managing a data reading / writing procedure for reading and writing data to / from a data rewritable information recording medium and a position where data is written and a position where data is not written on the information recording medium. Management information writing procedure for writing information to the information recording medium, and identification information for writing identification information indicating that data is being written to the information recording medium before writing data to the information recording medium by the data reading procedure. A write procedure, a management information update procedure for updating the management information when the next data has not been written even after a lapse of a predetermined time since the completion of the data writing by the data reading procedure, and the management information Writing of data written at a predetermined position on the information recording medium after the management information is updated by an update procedure Program for executing the identification information rewriting procedures for rewriting the identification information indicating the completion of the writing of data identification information indicating a solid.   14. The program according to claim 11, wherein when the information recording medium is mounted on the computer, the identification information written at a predetermined position of the information recording medium is read to indicate that data is being written. A procedure for judging whether or not it is identification information, and a corresponding position of the information recording medium managed as a position where data is not written in the management information when it is judged as identification information indicating that data is being written by the procedure. A procedure for checking whether or not there is data, and when it is determined that there is data, the management information is managed as a position where data is not written in the management information while there is data at the corresponding position of the information recording medium. For updating the current position to the position where the data is written, and after updating by the procedure, the information recording medium Program for executing a procedure for rewriting the identification information indicating that the writing of the data written in the location identification information indicating the completion of the writing of data.   15. The program according to claim 11, wherein the information recording medium is a DVD + RW disc, the management information is a bitmap of a formatting disc control block, and identification information indicating that the data is being written. Is a formatting open bit of the formatting status flag of the formatting disk control block.   The computer-readable recording medium which recorded the program as described in any one of Claims 11 thru | or 15.

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