JPH09139020A - Disk recording/reproducing device and disk discrimination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to use a data format recorded on a disk as a CD-ROM drive by discriminating whether or not an inserted disk is readable with a specified format with a discrimination means when the disk is read. SOLUTION: The disk recording/reproducing device 20 is provided with a memory 4, etc., in a computer device 21. A system program in the memory 4 constructs a file system driver 8, a disk answering driver 22, etc., successively and hierarchically under an operating system 7. When the disk is inserted into a CD-R drive 6, a command D2 is issued, and the fact of the presence of the disk is returned to the file system driver 8, and the state is discriminated. Further, the disk for driver 22 issues the command of whether or not the disk is a nonformat disk, and whether or not the data are recorded in a prescribed format, and discriminates whether or not the data can be read in a CD-ROM format.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. TECHNICAL FIELD OF THE INVENTION Conventional Technology (FIGS. 4 and 5) Problem to be Solved by the Invention (FIG. 6) Means for Solving the Problem Embodiments of the Invention (FIGS. 1 to 3)

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus and a disk identifying method, and more particularly to a CD-R (Compac
t Disk Recordable) CD-ROM (Compac
t Disk Read OnlyMemory) Applicable when used as a drive.

[0003]

2. Description of the Related Art In recent years, CD-ROM (Compact Disk Rea
d Only Memory) drives have come to be used as external storage devices such as computer devices. CD-
The ROM drive is a CD that was normally used for music
A (Comppact Disk) is used as a data recording medium, and a large amount of data can be recorded on a single recording medium as compared with a conventional recording medium. By using such a recording medium, the computer device can easily use a large amount of data such as moving image data.

However, the CD-ROM drive has a narrow range of operation because the disk used as a recording medium is a read-only disk and cannot be written by the user. In order to avoid such narrow operation, an external storage device called a CD-R (Compact Disk Recordable) drive has been devised. This uses a write-once disc that can be written by the user only once but as a recording medium. Since the CD-R drive extends the operation of the CD-ROM drive, the CD-R drive is
It is considered to be able to be used also as an OM drive.

In order to realize this, a CD-R drive is loaded into a CD-ROM drive by incorporating a device driver, which is a program for managing and controlling the CD-ROM drive into the computer device, so that the CD-ROM disc can be read. -A method is being considered that can also be used as a ROM drive.

In FIG. 4, reference numeral 1 denotes a disk recording / reproducing apparatus as a whole, and a controller 3 in the computer apparatus 2 uses a system program built in a memory 4 to make a CD-ROM interface board 5 The CD-R drive 6 is controlled by a control signal S1 sent via the. Also, as shown in FIG.
The system in the memory 4 is the operating system 7
Under the CD-ROM file system driver 8,
The CD-ROM device driver 9 and the hardware control driver 10 are sequentially constructed hierarchically. This system is operating system 7
Generates a control command in accordance with an instruction issued by the control unit 3 and sends the control command to the control unit 3, and the control unit 3 outputs the CD-ROM interface.
By the control signal S1 sent through the board 5, the CD-
Control the R drive 6.

The CD-ROM file system driver 8 issues a command D2 to the CD-R drive 6 in response to an instruction command D1 given from the operating system 7 and gives it to the CD-ROM device driver 9. . The CD-ROM device driver 9
A program for executing the operation by the command D2 is called to generate a control instruction command D3, and this is sent to the hardware control driver 10. The hardware control driver 10 issues a control command to the control unit 3 in response to the control instruction command D3. The control unit 3 sends the control signal S1 corresponding to the control command to the CD
-CD via ROM interface board 5-
It is supplied to the R drive 6 to actually drive the CD-R drive 6.

Since these drivers are for managing and controlling the data of the format originally recorded on the CD-ROM disk, the CD-R drive 6 is set to the CD-ROM.
It can be used by being recognized by the operating system 7 as a ROM drive. When writing data with the CD-R drive 6, a command is issued directly to the CD-R drive 6 by a dedicated program started up by the operating system 7.

[0009]

By the way, in the CD-R drive 6 which can be used also as the above-mentioned CD-ROM drive, a user who is not familiar with the system can use the CD-R drive 6 as the CD-ROM drive. It is not easy to confirm whether it is operating as a CD-R drive or a CD-R drive. Therefore, the CD
In the CD-R drive 6 operating as a ROM drive, a blank disc or an incomplete CD-ROM format, that is, a recording format as shown in FIG. There is a problem that the system does not operate normally when a disc on which data is recorded is inserted with the session incomplete.

For example, when a blank disk is inserted (FIG. 5), the CD-ROM file system driver 8 first issues a command to the CD-R drive 6 to detect the presence or absence of a disk. Since the CD-R drive 6 is a device capable of executing writing on a disk,
In response to this command, a status signal indicating a "Ready" state indicating that a disk exists is output. However, since the CD-ROM file system driver 7 manages and controls the read-only CD-ROM disk, it cannot recognize that the inserted disk is a blank disk, and the CD-R drive. 6
When a status signal indicating the "Ready" state is returned from, a command such as read is issued. Therefore, the CD-R drive 6 outputs a status signal indicating an error state in response to a command, or outputs incorrect information.

At this time, in the worst case, the CD-ROM file system driver 8 issues a command and the CD
-In some cases, the state in which the R drive 6 returns an error state in response to a command is repeated endlessly and the system falls into a runaway state.

The present invention has been made in consideration of the above points, and a disk recording / reproducing apparatus which can be used as a CD-ROM drive without the user being aware of the use mode and the recording format of the data recorded on the disk. And a disc identification method.

[0013]

In order to solve such a problem, in the present invention, a writable write-once disk and a disk drive for accessing a read-only disk in which data is recorded in a predetermined format, and a disk read At this time, it is detected whether or not the disk inserted in the disk drive is an unformatted disk and / or a disk recorded in a predetermined format, and the disk is determined in accordance with the result of this detection. And an identification means for identifying whether or not the data can be read in the form of.

At the time of reading the disk, by the identifying means,
Whether or not the inserted disk can be read in a format according to a predetermined format is identified, and the identification result is output as a status indicating the presence or absence of the disk in the disk drive.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1 in which parts corresponding to those in FIG. 4 are designated by the same reference numerals, 20 indicates a disk recording / reproducing device as a whole, and a control unit 3 in the computer device 2 is a system constructed in the memory 4. Using the program, CD-R
OM (Compact Disk Read Only Memory) drive to C
The CD-R (Compact Compact) is controlled by the control signal S1 sent through the D-ROM drive interface board 5.
Disk Recordable) The drive 6 is controlled. Further, as shown in FIG. 2, the system built in the memory 4 has a CD-ROM file system driver 8 and a CD-ROM under the operating system 7.
An R-disk compatible driver 22, a CD-ROM device driver 9, and a hardware control driver 10 are sequentially constructed in a hierarchical manner. This system is
A control command is generated in accordance with an instruction issued by the operating system 7 and is sent to the control unit 3, and the control unit 3 sends a CD.
The CD-R drive 6 is controlled by the control signal S1 sent through the ROM interface board 5.

That is, the CD-ROM file system driver 8 issues the command D2 to the CD-R drive 6 in response to the instruction command D1 issued from the operating system 7, and the CD-R disk compatible driver. It is sent to the CD-ROM device driver 9 via 22. CD-ROM device driver 9
Calls a program for executing the operation by the command D2, generates a control instruction command D3, and sends this to the hardware control driver 10.
The hardware control driver 44 supplies a control command to the control unit 3 in response to the control instruction command D3. The control unit 3 generates the control signal S1 according to this control command, and the CD-ROM interface board 5 is generated.
To the CD-R drive 6 via the
Drive the drive 6. Here, the driver 22 compatible with the CD-R disk is a CD-ROM file system system.
It is provided as an auxiliary driver for the driver 8, and normally, the command D2 issued from the CD-ROM file system driver 8 is directly sent to the CD-ROM.
-Supply to the device driver 9.

When a disc is inserted into the CD-R drive 6, the CD-ROM file system driver 8 issues a command D2 to the CD-R drive 6 to detect the presence or absence of the disc. On the other hand, CD-R drive 6
Shows the status indicating the presence / absence of a disk in the CD-ROM /
Return to file system driver 8. Upon receiving this status, the CD-R disk compatible driver 22 determines whether or not the inserted disk is a non-format disk, that is, a blank disk, and a predetermined format.
That is, a command is issued to detect whether or not the disk has data recorded with the "Lead-in" area and the "Lead-out" area added. At this time, from the CD-R drive 6 to the CD-ROM
The status indicating whether or not the disk is returned to the file system driver 8 is not passed to the CD-ROM file system driver 8. CD-R
The disk-compatible driver 22 inserts a disk that can be recognized by the CD-ROM file system driver 8 based on the status returned by the CD-R drive 6 in response to the command issued to the CD-R drive 6 by itself. Identify whether or not Only the identification result thus obtained is supplied to the CD-ROM file system driver 8.

For example, when a blank disk is inserted in the CD-R drive 6, the CD-ROM file system driver 8 first issues a command to the CD-R drive 6 to detect the presence or absence of the disk. Then, the CD-R drive 6 sends a "Ready" status indicating that there is an inserted disk to the CD-ROM file system driver 8 in response to this command. In response to this status, the CD-R disk compatible driver 22 issues a CD-R command to detect whether the inserted disk is a blank disk or not.
Issue to drive 6. At this time, the driver 22 corresponding to the CD-R disk is changed from the CD-R drive 6 to the CD-ROM.
The status indicating whether or not the disk is returned to the file system driver 8 is not passed to the CD-ROM file system driver 8.

The CD-R drive 6 sends a status indicating that the inserted disk is a blank disk to the CD-R disk compatible driver 22 in response to a command issued from the CD-R disk compatible driver 22. To do. Based on this status, the CD-R disk compatible driver 22 identifies that the disk inserted in the CD-R drive 6 is not a disk that the CD-ROM file system driver 8 can recognize, and
The status of "Not Ready" indicating that the disk is not inserted in the R drive 6 is supplied to the CD-ROM file system driver 8.

The disk recording / reproducing apparatus 20 is a CD
-When the R drive 6 is changed to the CD-R mode and the data is written to the disk, the operating system 7 starts a dedicated program. At this time, the operating system 7 supplies a "Disable" code to the CD-R disk compatible driver 22 to stop the operation. As a result, when the blank disk is inserted, the CD-R disk compatible driver 22 is "Not Ready".
The operating system 7 can recognize the existence of the disk because the status of the disk is not output.

In the above structure, the disk recording / reproducing apparatus 20 checks the presence / absence of the disk inserted in the CD-R drive 6 by the CD-ROM file system driver 8 to check the inside of the CD-R drive 6. If a disk is present in the disk, the CD-R disk compatible driver 22 checks whether the disk can be read in the CD-ROM format.

That is, in the procedure as shown in FIG.
First, the procedure starts at step SP1. Next, at step SP2, the CD-ROM file system driver 8 checks whether or not there is a disk inserted in the CD-R drive 6. If it is detected that the inserted disk does not exist, the process jumps to step SP7. When it is detected that the inserted disk exists, the state of the disk is detected by the CD-R disk compatible driver 22 in step SP3. First, in step SP4, it is detected whether or not the inserted disk is a blank disk. When it is detected that the inserted disk is a blank disk, the jump to step SP7 is performed. If the inserted disk is not a blank disk, the process proceeds to the next step SP5.

At step SP5, the CD-
It is detected whether or not the first session of recording in ROM format has been written. The first session is not written, or the "Lead-in" area and "Lead-ou"
If the writing is incomplete without the addition of the "t" area, jump to step SP7. If the first session was written in a format with the "Lead-in" area and "Lead-out" area added, the next step SP
Proceed to 6. At step SP6, it is detected that the inserted disk is neither the blank disk nor the disk recorded in the incomplete state of the first session, so that the CD-R disk compatible driver 22 C
The D-ROM file system driver 8 displays "Ready
Supply status. In step SP7, it is detected that the inserted disk does not exist, the disk is a blank disk even if it is inserted, or the disk cannot be recognized because the first session is incomplete. The R-disk compatible driver 22 is a CD-ROM file system driver 8
To the "Not Ready" status. Finally, in step SP8, the procedure ends.

In this way, the disk recording / reproducing apparatus 20 is
The CD-R disk compatible driver 22 detects whether or not the disk inserted in the CD-R drive 6 can be read in the CD-ROM format, and according to the detection result, the status indicating the presence or absence of the disk is displayed in the CD-ROM. By supplying the file system driver 8 to the CD
It is possible to prevent a malfunction that occurs when a disk in a state that the ROM file system driver 8 cannot recognize is inserted.

The disk recording / reproducing apparatus 20 is a CD-ROM.
When writing data to the disk by the R drive 6, a dedicated program is set up by the operating system 7. At this time, the operating system 7 makes the CD-R disk compatible driver. A "Disable" code is supplied to 22 to stop the operation. As a result, when a blank disk is inserted, the CD-R disk compatible driver 22 will
The operating system 7 can recognize the existence of the disk.

According to the above configuration, at the time of reading the disk, it is detected whether the disk inserted in the disk drive is a blank disk and / or whether the disk is recorded in the complete CD-ROM format. Then, a CD-R disk compatible driver 22 for identifying whether or not the disk can be read out in the CD-ROM format according to the result of this detection is provided, and the presence or absence of the disk is checked by the CD-ROM file system driver 8. When the command D2 to be detected is issued, the CD-R disk compatible driver 22 which has received the status indicating the detection result discriminates whether or not the disk can be read in the CD-ROM format. The CD-ROM file system driver 8 is provided with only the status corresponding to the identification result. As a result, a malfunction that occurs when a disc that cannot be recognized by the CD-ROM file system driver 8 is inserted can be prevented without the user's awareness, and the disc recording can be used as a CD-ROM drive. The playback device 20 and the disc identification method can be realized.

In the above-described embodiment, the operating system 7 issues a "Disable" code to the CD-R disk compatible driver 22 at the time of writing to stop the operation so that it is inserted into the CD-R drive 6. The case has been described in which the recorded blank disk or the disk recorded in the incomplete CD-ROM format can be recognized. However, the present invention is not limited to this, and the operating system 7 may use the CD-R disk. Compatible driver 2
The presence / absence of the disk may be checked using a command that can be directly issued to the CD-R driver 6 without going through step 2.

[0029]

As described above, according to the present invention, a writable write-once disk and a disk drive for accessing a read-only disk in which data is recorded in a predetermined format, and a disk drive when reading the disk are provided. It is possible to detect whether the inserted disk is an unformatted disk and / or whether it is a disk recorded in a predetermined format, and the disk can be read in a format of a predetermined format according to the result of this detection. A discriminating means for discriminating whether or not the disc inserted in the disc drive is discriminated by discriminating whether or not the inserted disc can be read out in a format according to a predetermined format. It is output as a status indicating the presence or absence of. In doing so, the C mode is used without the user being aware of the usage mode and the recording format of the data recorded on the disk.
A disk recording / reproducing apparatus and a disk identifying method that can be used as a D-ROM drive can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a disk recording / reproducing apparatus according to an embodiment.

FIG. 2 is a chart showing a system configured in a memory and a processing procedure performed by the system.

FIG. 3 is a flow chart showing a processing procedure of a disk identifying method according to an embodiment.

FIG. 4 is a block diagram showing a configuration of a conventional disk recording / reproducing device.

FIG. 5 is a chart provided for explaining a processing procedure and problems in the conventional disk identification method.

FIG. 6 is a structural diagram of data used for explaining a recording format of a CD-ROM disc.

[Explanation of symbols]

1, 20 ... Disk recording / reproducing device, 2, 21 ... Computer device, 3 ... Control unit, 4 ... Memory, 5 ... C
D-ROM interface board, 6 ... CD-
R drive, 7 ... Operating system, 8 ...
… CD-ROM file system driver, 9 ……
CD-ROM device driver, 10 ... Hardware control driver, 22 ... CD-R disk compatible driver.

Claims (4)

[Claims] 1. A disc recording / reproducing apparatus for accessing or writing data to or from a writable write-once disc or a read-only disc on which data is recorded in a predetermined format, wherein the write-once disc or the read-only disc is used. It is detected whether or not the disk drive to be accessed to, and the disk inserted in the disk drive when reading the disk are unformatted disks and / or recorded in the predetermined format. And a disc recording / reproducing apparatus for discriminating whether or not the disc can be read in a format according to the predetermined format according to a result of the detection. 2. The disk recording / reproducing apparatus according to claim 1, wherein the identifying means is a system program built in a memory. 3. The disk recording / reproducing apparatus according to claim 1, wherein the function of the identifying means is stopped or avoided when writing the disk. 4. When reading a disk, it is detected whether the disk inserted in the disk drive is an unformatted disk and / or a disk recorded in a predetermined format, and the result of the detection is detected. A disc identification method according to which the disc is discriminated whether or not the disc can be read out in a format according to the predetermined format.