JPH03142523A - Identification system for floppy disk - Google Patents

Abstract

PURPOSE:To prevent the breakage of data due to the wrong loading of a floppy disk (FD) by adding the identification information to the FD to read it out, checking whether a desired medium is loaded or not, and producing continuously the warnings until a correct medium is loaded to inhibit the processing if a medium other than the correct one is loaded. CONSTITUTION:A processing program 11 performs the read/write, initialization, copying, and other processes to a floppy disk FD in a processing execution state. An FD identification means 12 reads an identification information file 13 set on the FD to identify the FD loaded presently. If no file 13 exists on the FD, a new file is produced by an FD identification information adding means 14. When it is decided from the identifying result that the loaded FD complies with a request of the program 11, the program 11 is carried on. If not, a warning generating means 15 produces a warning to the program 11. Thus the program 11 interrupts its processing and requests the exchange of the FD. The processing is kept inhibited until a correct FD is loaded in accordance with the request of the program 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floppy disk identification system.

[Conventional technology]

Conventionally, an identification name is written on a label on the outer surface of a floppy disk, and an operator can identify each floppy disk by visually viewing the written identification name.

[Problem to be solved by the invention]

In the conventional floppy disk identification method described above, floppy disk identification relies entirely on human judgment.
If it is necessary to replace the floppy disk while a program is running, the contents of the floppy disk containing the program and important data may be erased due to incorrect checking of the floppy disk after replacement or not checking at all. There was a possibility that an accident could occur.

For example, on a computer with two floppy disk drives connected, the floppy disk containing the system program is stored in the first floppy disk drive, and the floppy disk containing data is stored in the second floppy disk drive. In a computer system that is installed and operated, when the floppy disk containing data is to be copied as a backup for safety, replace the floppy disk of the floppy disk drive with the floppy disk for copying. After confirming that the media has been replaced correctly, physical copying of the media will be performed. At this time, if the process is continued without replacing the floppy disk, the data will be copied onto the floppy disk where the system program is stored, and the system program will be erased.

[Means to solve the problem]

The floppy disk identification method of the present invention includes: an identification information adding means for adding identification information to a floppy disk; an identification means activated by a processing program to read the identification information from the floppy disk and identify whether or not the floppy disk is the intended medium; If the result of the identification indicates that an incorrect medium is installed, the processing program is provided with a warning generating means that issues a warning to the processing program and prohibits the continuation of processing until the correct medium is installed. It is characterized by preventing destruction.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention. The floppy disk identification information adding means 14 creates an identification information file as shown in FIG. 2 on the floppy disk.

The processing program 11 is a series of processing programs executed on a computer, and the floppy disk identification means 12 identifies the identification information file 1 on the floppy disk.
3 to identify the currently installed floppy disk. As a result, if the installed floppy disk does not meet the requirements of the processing program, the warning generating means 15 issues a warning to the processing program.

FIG. 3 shows the operational flow of this embodiment.

When a processing program on a computer attempts to read, write, initialize, copy, etc. on a floppy disk, which is an external storage device, during execution of the process, the floppy disk identification means identifies the floppy disk on the floppy disk. The currently installed floppy disk is identified by reading the identification information file. At this time, if there is no identification information file on the floppy disk, a new identification information file is created by the floppy disk identification information adding means.

As a result of the identification, if the installed floppy disk meets the requirements of the processing program, the processing program will be executed as is, but if the floppy disk does not meet the requirements, a warning will be issued to the processing program using the warning generating means. issue a warning.

When the processing program receives a warning, it interrupts processing, displays a message, etc. to the operator to replace the floppy disk, and continues processing until a floppy disk that meets the requirements of the processing program is inserted. cannot proceed.

If a processing program includes processing to initialize a floppy disk during execution, in order to determine whether the installed floppy disk can be initialized,
The identification code shown in Figure 2 can be assigned as shown in Figure 4. In other words, before the processing program executes the initialization process, the floppy disk identification means is installed in the drive to be initialized. The identification code is read from the identification information of the current floppy disk, and if the identification code is other than OO, the warning generation means issues a warning to the processing program, and the processing program that received the warning is initialized by interrupting execution. This prevents you from accidentally initializing a floppy disk that should not be used.

In order to minimize the damage caused by data destruction due to accidents, etc., if the process includes copying floppy disks on which data is stored at regular intervals, after the copying process is executed, the data cannot be copied with exactly the same content. There are copies of floppy disks, and one operator performs an update process that changes the data stored on one of the floppy disks, and at the same time another operator updates the data stored on another floppy disk. If similar processing is performed on floppy disks, there will be floppy disks that store data with different contents, and it will be difficult to know which floppy disk has the latest data.

In such a case, the identification code shown in Figure 2 is assigned as shown in Figure 5 to distinguish between the floppy disk that will be the original copy and the floppy disk that will be the copy destination.
This can be avoided by issuing a warning and interrupting processing when a copied floppy disk is inserted, and by limiting the number of floppy disks that can update the stored data to one at any time. can.

In either case, this identification code needs to be unified within a series of systems.

〔Effect of the invention〕

As described above, the present invention has the effect of preventing accidents such as erasure of programs, data, etc. on the floppy disk due to the operator's mistake in loading the target medium by directly identifying the floppy disk from the program.

When a floppy disk with the same content is divided into multiple disks, information about the total number of disks and the number of disks the floppy disk is made of is added to the identification information.
Mistakes in the mounting order can be prevented.

Furthermore, since the floppy disk identification information file used for identification can be handled in the same way as a normal character string file, the contents can be easily confirmed and modified from other than the processing program.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a diagram showing the contents of the identification information file 13 in FIG. 1, FIG. 3 is a flowchart of this embodiment, and FIGS. 4 and 5 are , the allocation of identification codes in the identification information file 13 in FIG. 1 is a diagram showing an example. 11... Processing program, 12... Floppy disk identification means, 13... Identification information file, 14...
- Floppy disk identification information adding means, 15...warning generating means.

Claims (3)

[Claims] (1) An identification information adding means for adding identification information to a floppy disk, an identification means activated by a processing program to read the identification information from the floppy disk and identify whether or not the medium is the intended medium, and based on the result of the identification. If an incorrect medium is installed, the processing program is provided with a warning generating means that not only issues a warning to the processing program but also prohibits the continuation of processing until the correct medium is installed, thereby preventing data destruction due to incorrect installation of the floppy disk. A floppy disk identification method characterized by: (2) The floppy disk identification method according to claim 1, wherein the identification information includes a code that can identify write-initializable, writable-initialization-inhibited, or write-initialization-inhibited. (3) The floppy disk identification method according to claim (1), wherein the identification information includes a code that can identify the program, normal data, or copy data.