JPS6313188A - Disk file device - Google Patents

Abstract

PURPOSE:To simplify the storage and management of a disk and a storage device by recording an identification code to a prescribed position of the disk and storing the identification code also to the storage device prior to the write of information. CONSTITUTION:A controller 1 checks an identification code of an optical disk 3 and if the code cannot be read, a designated identification code is written. Then the data is read and the same code is stored in a rewritable storage device, e.g., a specific area of a hard disk 4. In issuing an information write command to the controller 1, the code is read from the disks 3, 4, prior to the write and the both are compared. When the codes are dissident, it is processed as an error, the write is inhibited. When coincident the write is executed. In corresponding one storage device to plural disks in such a way, the storage and management of the disks and storage device are simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk file device typified by an optical disk file device.

[Summary of the invention]

In the present invention, an identification code is stored in both the disk and the storage device that stores the directory.

[Conventional technology]

In recent years, optical discs have been developed and some have been commercialized. Such optical discs use metals, pigments, etc. as recording materials, and although information can be recorded and reproduced, once recorded information cannot be updated (re-recorded). Therefore, when predetermined information is recorded on an optical disk, the directory is recorded on an updateable magnetic disk or the like.

[Problem that the invention seeks to solve]

However, when main information and its directory information are recorded on separate recording media in this way, these recording media must always be stored and managed in pairs, which is inconvenient.

[Means for solving problems]

The present invention provides a disk file device that includes a non-updatable disk for recording predetermined information, a drive device for driving the disk, a control device for controlling the drive device, and an updatable storage device for storing disk directory information. , the control device is located at a predetermined position on the disc,
In addition to recording an identification code to identify the disc,
It is characterized by storing an identification code in a storage device.

[Effect]

Prior to writing information, the control device records an identification code at a predetermined position on the disc and also stores the identification code in the storage device.

〔Example〕

FIG. 1 is a block diagram of a disk file device according to the present invention. In the figure, 1 is a control device such as a computer, and 2 is a drive device, which drives an optical disk 3 to record and reproduce information.

4.5.6 are a hard disk, a floppy disk, and a RAM as updatable storage devices.

When the control device 1 initializes the optical disc 3, it outputs a control signal to the drive device 2 to select a specific sector (for example, S.

S,) when a predetermined identification code has already been written in sectors S0 and S1.

Since the initialization operation has already been completed, it is treated as an error. Sector S. , So, if the identification code cannot be read from the sectors s0 and sl (for example, the volume number N of the optical disc)
). This identification code is sector S0 and sector S
Multiple writing is performed on both 1 and 1.

When this write operation is completed, then that sector S0
If data cannot be read from sector S1, it is considered an error.

Subsequent writing operations of main information are prohibited. When data is read, the read identification code (volume number) is compared with the input identification code, and if the two do not match, an error is determined. If it is possible to write and read the correct identification code for only one of the two sectors S0 and S□, and it is not possible to write or read the correct identification code for the other sector,
It is also possible to prevent this optical disc 3 from becoming an error. However, in this case, if the identification code of the remaining sector cannot be read later, it becomes impossible to identify the optical disc. Therefore, in order to ensure safety against the possibility that the recorded signal will deteriorate and become unreadable in the future, if the identification code cannot be read from both sectors So and S□ at least two (of course more may be possible), it will be considered an error. It is preferable to do so.

When a correct identification code is read out, a specific area of at least one of the primary updateable storage devices, for example, the hard disk 4, is divided as an area of the optical disk, and the same identification code (volume number) is assigned thereto. be recorded. After the above operations are completed, the program moves to the main command routine.

The above operation is shown in a flowchart as shown in FIG.

Next, when a command to write predetermined information (main information) is input, the control device 1 first writes sector S of the optical disc 3 prior to the writing operation. , S data is read from at least one of them. Similarly, the identification code (volume number) is read from the hard disk 4 and compared. If the surface identification codes do not match, it is treated as an error and subsequent writing operations are prohibited. When the two identification codes match, a write operation is executed, and after the write operation is completed, the process shifts to the first command input routine.

The above operation is shown in a flowchart as shown in FIG.

When a write operation is performed as described above, the identification code is checked each time a write command is input, and the write operation takes time. Therefore, when a command is input for the first time, the identification code is checked as described above, and when a write command is input from then on, the optical disc 3 is first read from the drive device 2 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, a write operation is immediately executed, and if it has been replaced, the identification code can be checked in the same way as in the case described above. In this way, the time required for the write operation can be shortened.

Each time the control circuit 1 writes information to the optical disk 3, it updates the corresponding directory on the hard disk 4.

Although the write operation has been described above as an example, the identification code is similarly checked in the read operation as well.

The present invention can also be applied to file devices for non-updatable disks other than optical disks.

〔effect〕

As described above, the present invention provides a disk file device including a non-updatable disk for recording predetermined information, a drive device for driving the disk, a control device for controlling the drive device, and an updatable disk for storing directory information of the disk. The control device records an identification code for identifying the disk at a predetermined position on the disk, and also stores the identification code in the storage device, so that one storage device can be used for multiple disks. storage of disks and storage devices,
Management becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a disk file device of the present invention.
FIGS. 2 to 4 are flowcharts thereof. 1...Control device 2...Drive device 3...Optical disk 4...Hard disk 5...Floppy disk 6...RAM and above

Claims (1)

[Claims] A non-updatable disk that records predetermined information, a drive device that drives the disk, a control device that controls the drive device, and an updatable storage device that stores directory information of the disk. A disk file device, characterized in that the control device records an identification code for identifying the disk at a predetermined position on the disk, and causes the storage device to store the identification code.