JPS61973A - error detection device - Google Patents

Abstract

PURPOSE:To restore a system quickly when error occurs during the operation of a secondary storage device, by recording classifications and positions of errors which occur when data of a recording medium is read and checking this hysteresis. CONSTITUTION:When receiving a read instruction from a CPU1, a flopply disc controller 2 controls a foppy disc drive 3 to read out data on a floppy disc. If an error occurs, the CPU1 stores the position (a track number and a sector number) of this error occurrence on the recording medium and an error code in a RAM4. This position and the code error are compared with those of errors which occur in the past; and if the same kind of error occurs N-number of times continuously in the same position, it is judged that the recording medium is damaged physically or magnetically. The sector or the track where this error occurs is not used hereafter to stabilize the operation of an apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an error detection device in an apparatus using a secondary storage device in which recording media such as Freonbie disks are exchanged and used.

Conventional Structures and Problems In recent years, Freonbie disk devices have become smaller and lighter, and are now being used in ordinary homes as inexpensive peripherals for personal computers.

However, storage of recording media such as floppy disks is difficult, and they are easily damaged physically and magnetically.

On the other hand, devices that use floppy disks can only determine whether the data on the recording medium can be read correctly or not. It was not possible to determine whether this was due to simple noise.

Also, positions where conventional data cannot be read correctly (track numbers,
The sector number) was recorded only when the recording medium was formatted, and even if an error occurred during subsequent use, it was simply treated as a read error.

As a result, it took time to investigate the cause of the error, which sometimes delayed system recovery.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks and eliminates the problem when an error occurs during operation of a secondary storage device such as a floppy disk.
So that you can quickly restore your system,
The present invention provides an apparatus for detecting physical and magnetic damage caused to a recording medium.

Structure of the Invention The present invention provides an error code that displays the type of error that occurs when reading a recording medium, and a RAM that records the location where the error occurs, and uses data recorded in the RAM to detect damaged records. It is configured to detect the medium.

DESCRIPTION OF EMBODIMENTS Examples of the present invention will be described below. In Figure 1, 1 is the CPU, 2 is the floppy disk controller, 3 is the floppy disk drive, and 4 is the error code and location where the error occurred (
Track number, sector number) are recorded (RAM).

FIG. 2 shows a flow diagram of the above embodiment. First, the CPU 1 issues a data read command to the floppy disk controller 2. Having received the read command, the Fronby disk controller 2 controls the 70-inch disk drive 3 to read the data on the Fronby disk. When the reading is completed, the floppy disk controller 2 notifies the C'PU 1 that the data reading has ended and whether or not there is an error.

If there is an error, the CPU 1 records the location (track number, sector number) on the recording medium where the error occurred and the error code in the RAM 4.

Next, compare the occurrence position and error code of this error with the occurrence position and error code of past errors, and if the same type of error has occurred at the same position N times in a row (for example, 5 times in this example), If so, it is determined that the recording medium has suffered physical or magnetic damage.

Then, during subsequent use, the sector or track is not used, thereby stabilizing the operation of the device.

Effects of the Invention As is clear from the above explanation, according to the present invention, the types and locations of errors that occur when reading data on a recording medium such as a floppy disk are recorded, and the history of the errors is examined. It is possible to detect recording media that have suffered physical and magnetic damage. By detecting a recording medium that has suffered such physical or magnetic damage, it is possible to significantly shorten the time required for system recovery.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an error detection device according to an embodiment of the present invention, and FIG. 2 is a flow diagram showing the operation of this device. 1... CPU, 2... Floppy disk controller, 3... Floppy disk drive, 4... RAM. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 figure

Claims (1)

[Claims] A secondary storage device used by exchanging recording media, a controller that controls this secondary storage device, and an error code and error occurrence that can determine the type of error that occurs when reading data from the secondary storage device. RAM that can record the location (track number and sector number)
and a CPU that controls the controller and the RAM.
and an error detection device comprising means for detecting a recording medium that has suffered physical and magnetic damage by checking the state of errors that occurred during the past N times of reading recorded on the RAM. .