JPH09320245A - Disk file system and controller therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the storage and management of disks and a storage device by storing the directory information of plural disks into a single storage device. SOLUTION: This system is provided with a disk 3 whose information is incapable of being renewed, a drive device 2 which drives the disk, a control device which controls the drive device 2, and a renewable storage device (e.g. hard disk 4) which can store the directory information of the disk. The control device 1 causes the storage device 4 to store the disk-identifying information recorded on the disk 3 and thereby correspondence of one storage device 4 to plural disks is made possible and the storage and management of the disk 3 and the storage device 4 are simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc file system and a disc file system controller for recording identification information recorded on a disc in association with a storage device for storing directory information of the disc.

[0002]

2. Description of the Related Art In recent years, optical discs have been developed and partially commercialized. Such an optical disc uses a metal as a recording material,
Although a dye or the like is used, information can be recorded and reproduced, but information once recorded cannot be updated (rerecorded). Therefore, when predetermined information is recorded on the optical disk, the directory information is recorded on an updatable magnetic disk or the like.

[0003]

However, if the main information and its directory information are recorded on different recording media in this way, it is inconvenient because the recording media must always be stored and managed as a pair. .

[0004]

The present invention has been made in view of the above problems, and a disk file system according to claim 1 is a disk in which information cannot be recorded and updated, and a drive device for driving the disk. A control device for controlling the drive device and one updatable storage device for storing directory information of the disc are provided, and the control device stores identification information for identifying the disc recorded on the disc in the storage device. It is what

According to a second aspect of the present invention, there is provided a disk file system control device which stores a disc in which information cannot be recorded and updated, a drive device which drives the disc, a control device which controls the drive device, and directory information of the disc. And an updatable storage device for controlling a disc file, wherein the control device controls the storage device to store identification information for identifying the disc recorded at a predetermined position of the disc. To do.

[0006]

According to the invention described in claim 1, the control device comprises:
Prior to operations such as recording information, the identification information recorded on the disc is read via the drive device,
Identification information for identifying such a disc is stored in one storage device for storing the disc directory information in association with the directory information.

According to the second aspect of the present invention, the control device reads the identification information recorded at a predetermined position of the disc through the drive device and operates the directory of the disc prior to an operation such as recording and reproducing of information. The storage device for storing information is also controlled to store the disc identification information in association with the directory information.

[0008]

1 is a block diagram of a disk file system according to the present invention. In the figure, reference numeral 1 is a control device including a computer and the like, and 2 is a drive device, which drives an optical disc 3 to record or reproduce information recorded on the optical disc. Reference numerals 4, 5, and 6 are a hard disk, a floppy disk, and a RAM, which are updatable storage devices.

When the control device 1 initializes the optical disc 3, the control device 1 outputs a control signal to the drive device 2 so that a specific sector (eg, S0, S1) of the optical disk 3 is output.
Read data from. When the identification code as the predetermined identification information is already written in the sectors S0 and S1, it is an error because the initialization operation has already been completed. When the identification code cannot be read from the sectors S0 and S1, the identification code (for example, the volume number N of the optical disc) designated and input to the sector S0 and S1 is written. This identification code is sector S0
And sector S1 are multiplexed.

When this write operation is completed, the data is read from the sector S0 and the sector S1. If the data cannot be read, it is determined that an error has occurred, and the subsequent main information write operation is prohibited. On the other hand, when the data is read, the read identification code (volume number) is compared with the input identification code, and if they do not match, an error is generated. Also, two sectors S0,
If the correct identification code can be written or read in only one sector of S1 and the correct identification code cannot be written or read in the other sector, the optical disc 3 should not be an error. You can also However, in such a case, if the identification code of the remaining one sector cannot be read later, the optical disc cannot be specified. Therefore, at least two (or more may be necessary) in consideration of the safety against future unreadable read signals.
It is preferable to make an error when the identification code cannot be read from both the sectors S0 and S1.

When the correct identification code is read, at least one of the updatable storage devices, for example, a specific area of the hard disk 4 is divided as an area of the optical disk, and the same identification code ( Record the volume number). After the above operation is completed, the process proceeds to the next command routine. FIG. 2 shows the above operation in a flowchart.

Next, when a command for writing predetermined information (main information) is input, the control device 1 first reads data from at least one of the sectors S0 and S1 of the optical disc 3 prior to the writing operation. Similarly, the identification code (volume number) is read from the hard disk 4 and the two are compared. If the two identification codes do not match, the subsequent write operation is prohibited as an error. When the two identification codes match, the write operation is executed, and after the write operation is completed, the process proceeds to the next command input routine. The above operation is shown in a flowchart in FIG.

When the write operation is performed as described above, the identification code is checked every time a write command is input, and the write operation takes time. Therefore, when a command is first input, the identification code is checked as described above, and thereafter, when a write command is input, for example, as shown in the flowchart of FIG. It is possible to determine whether or not it has been replaced, and if it has not been replaced, immediately execute the write operation. If it has been replaced, the identification code can be checked in the same manner as described above. By doing so, the time required for the write operation can be shortened.

Each time the control circuit 1 writes information on the optical disc 3, it updates the directory information of the corresponding hard disk 4. The write operation has been described above as an example,
The identification code is checked in the same manner in the read operation. The present invention can be applied to a file system of a non-updatable disc other than the optical disc.

[0015]

As described above, according to the first aspect of the invention, the control device reads the identification information recorded on the disc and stores the directory information of the disc prior to the operation such as recording the information. Since the identification information is stored in one storage device corresponding to the directory information, one storage device can be made to correspond to a plurality of disks, and the storage and management of the disks and storage devices can be simplified. Become.

According to the second aspect of the present invention, the control device reads the identification information recorded at a predetermined position on the disc prior to an operation such as recording / reproducing of information.
In the storage device that stores the directory information of the disc,
Since the identification information is controlled so as to be stored in association with the directory information, one storage device can be associated with a plurality of disks, and the storage and management of the disks and storage devices can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram of a disk file system of the present invention.

FIG. 2 is a flowchart of a control device of the disk file system of the present invention.

FIG. 3 is a flowchart of the control device of the disk file system of the present invention.

FIG. 4 is a flowchart of the control device of the disk file system of the present invention.

[Explanation of symbols]

 1 ... Control device 2 ... Drive device 3 ... Optical disk 4 ... Hard disk 5 ... Floppy disk 6 ... RAM

Claims (2)

[Claims] 1. A disc in which information cannot be recorded and updated, a drive device for driving the disc, a control device for controlling the drive device, and one updatable storage device for storing directory information of the disc. The disc file system, wherein the control device stores identification information for identifying the disc recorded on the disc in the storage device. 2. A disc comprising a disc on which information cannot be recorded and updated, a drive device for driving the disc, a control device for controlling the drive device, and an updatable storage device for storing directory information of the disc. A control device for a file, wherein the control device controls the storage device to store identification information for identifying a disc recorded at a predetermined position of the disc in the storage device. .