JPS582763A - Detection for degradation of magnetic medium - Google Patents

Abstract

PURPOSE:To detect the degradation of a magnetic medium, by performing always the read operation even when input/output commands from software are not executed and counting the number of errors which occur in a certain time. CONSTITUTION:Information on a magnetic disc 2 is read by a magnetic head, which is not shown in figure, and is amplified by a read amplifier 3 and is converted to parallel signals through a gate circuit 14 by a conversion register 4 and is inputted to a CPU11. When the operation of a magnetic device is stopped to stop the read, a diagnosis controlling part 10 places the head in a required position and gives a command to a controlling part 9 to start the read. Since the gate circuit 14 is operated so as to be closed when the magnetic disc device does not perform the read operation, information is inputted to only an error detecting register 6. Contents of the register 6 are inputted to an error detecting circuit 7, and errors are detected; and when the number of errors in a counting circuit 8 becomes a prescribed value, it is displayed on a display device 12 or an alarm device 13 through a CPU11 or alarm is issued.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic medium deterioration detection method, and more particularly to a magnetic medium deterioration detection method κ for detecting deterioration of a magnetic disk used in a magnetic disk device.

In recent years, various types of magnetic media have been used to store information, including magnetic tapes, floppy disks, IUL disks, and magnetic drums. The magnetic disks in these media are often used because they have a sealed structure, a simple second structure, and high reliability. However, even magnetic disk devices that use this magnetic disk are not free from failure, and failures occur due to deterioration of the magnetic head, its surroundings, and the KII disk itself. κ stores a large amount of heavy data, so if a failure occurs, it will cause a serious loss of life to the crew.Therefore, in preparation for failures, magnetic tape devices or medium exchangeable magnetic disk devices should be installed. Alternatively, it is common to prepare a floppy disk device. and ζ is magnetic. tape devices and medium-swappable magnetic disk devices. On the other hand, allotubi disk devices are inexpensive and often used, but due to their processing speed, it takes too much time to store information on large capacity magnetic disks. There are nine drawbacks.

The present invention was developed in view of the above drawbacks.The present invention provides a method for detecting deterioration of a magnetic medium so that an abnormality can be detected and troubleshooting can be performed before the magnetic disk deteriorates and becomes completely κ read or defective. The purpose is to To briefly explain the present invention, it is equipped with a function that always performs read operation even when input/output commands from the software square are executed, and a stitch count circuit that counts the number of errors that occur within a fixed time. The present invention is characterized in that the deterioration of the magnetic medium is detected using the magnetic recording medium.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of an embodiment showing a deterioration detection method of a winning medium according to the present invention, where l is a magnetic disk controller, 2 is a magnetic disk, 3 is a read amplifier,
4 is the conversion register, 5 is the pack register, and 6 is! l detection register, 7 an error detection circuit, 8 a counting circuit, 9 a control section, 10 a diagnostic control section, 11 a central processing unit, 12
13 is a display device, 13 is an alarm device, and 14 is a Ghent circuit. The difference from the general circuit of this embodiment is that a counting circuit 8 and a diagnostic control section 10 are provided.The counting circuit 8 has a function of counting the number of errors of the error detection circuit 7 and a timer function, It has a function of outputting an output signal when a required number of errors occur or exceed the required number. The diagnostic control unit 1o has a magnetic disk control unit @1 that reads /
It detects that there is no operation such as writing or head driving (positioning), and sends the control unit 9 to read or register 1.
It has the ability to issue Eng commands. The operation will be explained below. The information on the magnetic disk 2 is read by a magnetic head that does not disclose information, and the amplified information is input to the conversion register 4 via the gate circuit 14, and the conversion register 4 converts the serial signal into a parallel signal and sends it to the central processing unit. 111. The above is the operation of a magnetic disk device during general KMII use. When the operation of this magnetic device is stopped and reading is stopped, the diagnostic control unit 10 performs the repositioning of the magnetic head as described above. The control unit 9 is driven so as to start the succession at the position shown in FIG. Therefore, information on the magnetic disk 2 is input to the gate circuit 14 through the same culm as described above. This gate circuit 14 operates to shut off when the magnetic disk fit@ does not perform a read operation. Therefore, information is input only to IWt>detection register 6. Of course, the manufacturing detection register 6t1 operates even during normal operation. The contents of the error detection register 6 are input to the error detection circuit 7 to detect an error. The detected error is manually input to the counting circuit 8, and when it reaches a certain value, the stitch count circuit 8 outputs a signal, and accordingly, when the power is turned on, the counting circuit 8 continuously counts the number of errors. 1 is a block diagram showing another embodiment of the present invention, and FIG.
This shows a case in which the processing device is already equipped with an IC processor and a diagnostic control inside it, and it shows that it is only necessary to provide a counting circuit on the processing device W side, which has the advantage that the manufacturing cost is further reduced. have. Further, in the embodiment, the display device 112 or the alarm device 13 was described as being connected through the processing device 111, but it goes without saying that there is no problem in connecting it directly to the counting circuit.

As is clear from the above explanation, by setting the number of errors that occur in the required time to a required value, the present invention becomes a magnetic medium deterioration detection method that detects an abnormality in the magnetic medium before it deteriorates and causes a reading failure. If applied to magnetic equipment, it will have many advantages in terms of magnetic equipment operation.

[Brief explanation of drawings]

Figure 1 shows a method for detecting deterioration of magnetic media according to the present invention.
Example Block Diagram FIG. 2 is a block diagram of another embodiment of the invention. In the figure, 1 indicates the air disk control unit 1, 5 indicates a film detection circuit, and 8 indicates a counting circuit.

Claims (1)

[Claims] This is a method for detecting the deterioration of a magnetic base used in a magnetic device, and includes a means for performing a reading operation even when the wim*device instruction is not being executed, and a method that occurs within a predetermined time.
11 The error @ number of the device is equipped with the # number circuit, ll!
When the needle angle of the needle Wk path is predetermined and is greater than the required number,
A method for detecting deterioration of a magnetic medium, characterized in that a deterioration detection signal for the medium is emitted.