JPS63317907A - Magnetic disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To confirm the data write state by recording a DC magnetized part in an end code and putting magnetic powder different in color from the surface of a floppy disk on the floppy disk. CONSTITUTION:A DC magnetized part 14 is recorded in an end code 13 on the boundary between the data field and the gap of each sector 9 on a floppy disk 7. When magnetic powder different in color from the surface of the disk 7 is put on the disk 7, magnetic powder is not stuck to the DC magnetized part 14 of each track 8 and the position of this part 14 is confirmed. Consequently, the position of the DC magnetized part 14 is confirmed to examine the data write state on each sector in case of a defect of the disk 7, development of a data processing program, or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording and reproducing means for recording and reproducing information on and from a magnetic disk such as a floppy disk.

(Prior Art) Conventionally, when recording and reproducing data on a magnetic disk such as a floppy disk, formatting is performed in advance to set a plurality of sectors consisting of ID fields, data fields, etc. in many tracks of the floppy disk. The desired data is recorded in the data field of each set sector.

(Problems to be Solved by the Invention) In the magnetic disk recording and reproducing apparatus as described above, each sector is magnetized by formatting, and data is written in the magnetized portion. Therefore, it is possible to check the position of each track by reading the magnetized part, but it is not possible to check the position of each sector within the track. Therefore, if the floppy disk becomes defective or if data is not recorded on the floppy disk, There is a problem in that it is not possible to check the state of writing to each sector when developing a data processing program for reproduction.

(Object of the Invention) An object of the present invention is to provide a recording/reproducing apparatus for recording data on a floppy disk so that the state of data writing in each sector of a track can be confirmed.

(Means for Solving the Problems) In order to solve the above problems, the present invention records a DC magnetized portion in an end code located at the rear of a data field within a large number of sectors set on a magnetic disk. A magnetic disk recording/reproducing device is provided with a recording control means.

(Function) With the above means, a DC magnetized portion is recorded in the end code, so when magnetic powder of a color different from that of the magnetic disk is attached to the floppy disk, the position of the end code can be confirmed.

(Embodiment) Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings.A magnetic head drive device of a magnetic disk recording/reproducing device has a feed screw 2 on the output shaft of a step motor 1 as shown in FIG. The feed screw 2 is rotated based on the operation of the step motor 1.A carriage 4 is movably supported on a support rod 3 disposed parallel to the feed screw 2. A magnetic head 5 is attached.A feed spring 6 is protruded from one side of the carriage 4, and the tip of the feed spring 6 is engaged with the feed screw 2.Therefore, the feed is caused by the operation of the step motor 1. screw 2
When is rotated, the feed spring 6 is moved in the axial direction of the feed screw 2, so that the magnetic head 5 is moved along the support rod 3 in the radial direction of the floppy disk.

As shown in FIG. 3, the floppy disk 7 on which data is recorded and reproduced by this magnetic disk recording and reproducing device is rotated by a spindle motor (described later), prior to its use.
A-Matting creates a large number of concentric tracks 8 (
In FIG. 3, J3 shows only one track), and each track 8 is so arranged that its entire circumference is divided into a plurality of sectors 9. As shown in FIG. 4, each sector 9 is composed of an ID field 10 in which a sector number indicating the start and address of the sector is recorded, a data field 11 in which data is written, and a gap 12. , an end code 1 indicating the rear end of the data is placed at the boundary between the data field 11 and the gap 12.
3 is recorded. The end code 1
3 usually consists of 10 bytes of hexadecimal rDJ or rllolJ repeated, and as shown in FIG. 4, 3 bytes of DC magnetization part 14 or rooooJ are provided therein.

Next, the electrical configuration of this magnetic disk recording/reproducing apparatus will be explained with reference to FIG.

The magnetic disk control circuit 15 has a central processing unit (hereinafter referred to as a CPU) equipped with a program memory 16 in which a program for controlling the operation of the recording/reproducing apparatus is stored in advance.
) 17 is connected, and the CPLJ 17 outputs a signal to the magnetic disk control circuit 15 based on the program stored in the program memory 16. That is, the program memory 16 contains the floppy disk 7.
A program for formatting via the magnetic head 5 moves the magnetic head onto a predetermined track 8 and records data field 1 in a predetermined sector 9.
1, a program for writing an end code 13 having the DC magnetized portion 14 at the rear end of the data, a program for reading the written data, and the like are stored.

A working memory 18 connected to the same <CPLJ 17 temporarily stores various data while the magnetic disk recording/reproducing device is in operation.

The magnetic disk control circuit 15 includes a magnetic disk drive circuit 1.
A spindle motor 20 for driving the floppy disk 7, the step motor 1, and the magnetic head 5 are connected to the magnetic disk drive circuit 19. The magnetic disk drive circuit 19 drives and controls the step motor 1 and the spindle motor 20 based on the output signal of the magnetic disk control circuit 15.

Now, when data is recorded on the floppy disk 7 using the magnetic disk recording/reproducing device as described above, an end code 13 is written at the rear end of the data file 0--ruby 11 of each sector 9, as shown in FIG. , a DC magnetized portion 14 is recorded within the end code 13.

If magnetic powder is applied to such a floppy disk 7 in a color different from that of the surface of the floppy disk 7, the magnetic powder will not adhere only to the DC magnetized portion 14 of each track 8, making it possible to confirm its position. can.

Therefore, by checking the position of the DC magnetized portion 14, it is possible to check the position of each sector in the track, and also the amount of data written in that sector. When this occurs, or when developing a data processing program for recording and reproducing data on a floppy disk, it is possible to check the state of data written to each sector.

(Effects of the Invention) As detailed above, the present invention can provide a recording/reproducing device that can record data on a floppy disk so that the status of data writing in each sector of a track can be confirmed. Demonstrates excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the electrical configuration of a magnetic disk recording/reproducing apparatus embodying the present invention, FIG. 2 is a perspective view showing a magnetic head feeding mechanism, FIG. 3 is a front view of a floppy disk, and FIG. The figure is an explanatory diagram showing sectors set on a floppy disk. In the figure, 5 is a magnetic head, 7 is a floppy disk, 8 is a track, 9 is a sector, 11 is a data field, 13
is an end code, 14 is a DC magnetization portion, and 17 is a CPU.

Claims (1)

[Claims] 1. Recording a signal on a magnetic disk via a magnetic head,
Alternatively, it consists of a recording and reproducing means for reproducing signals from the magnetic disk, and a recording control means for recording a DC magnetized part in an end code located at the rear of the data area within a large number of sectors set on the magnetic disk. Magnetic disk recording and reproducing device.