JPH0896491A - Medium for checking drive system - Google Patents

Abstract

PURPOSE: To allow the presence of a fault in a drive system in a driver of medium replacement type to be simply checked. CONSTITUTION: A 1st sector 21, a 2nd sector 22, a 3rd sector 23, and a 4th sector 24 separated in the circumferential direction of a magnetic disk are formed on an innermost track 11 of the disk. Address information is recorded magnetically onto an ID part 31 of each of the sectors 21-24 based on number of recording revolutions set differently respectively with respect to a reference value. The magnetic disk is loaded to a magnetic disk device being an object of check, that reproduces the address information recorded onto the ID part 31 of the each of the sectors 21-24. Then a fault in a driving system is discriminated depending whether or not a read error takes place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an inspection mainly used for inspecting a drive system of a drive device such as a magnetic disk device for reproducing information recorded on a magnetic recording medium such as a floppy disk. The present invention relates to a magnetic recording medium for use.

[0002]

2. Description of the Related Art A medium exchange type such as a magnetic disk device for recording or reproducing information on a medium such as a medium such as a floppy disk or a magnetic head is driven (mainly rotated) at high speed. In the drive device, recording and reproduction of information for one medium are often performed by different devices, and it is recorded that there is an error in the rotational speed of the drive system for driving the medium or the magnetic head between the devices. When reproducing information, a read error may occur because a sufficient reproduction signal cannot be obtained. Therefore, in the medium exchange type drive device, the precision of the rotational speed of the drive system is strictly regulated in order to ensure the compatibility between the media (in JIS, the allowable error of the rotational speed in the magnetic disk device is the standard value). It is set to ± 1%).

Conventionally, the inspection of the rotational speed of the drive system in the drive device is performed by rotating the drive motor and measuring the index signal generated in response to the rotation with an oscilloscope or a frequency measuring machine.

[0004]

However, in that case, since it is necessary to observe the signal by connecting a lead wire to the drive circuit system or applying a probe of an oscilloscope, the inspection itself is not possible. Not only is it very time-consuming and time-consuming, but there is a problem that after the drive device is installed in a system such as a personal computer, it cannot be inspected unless the drive device is separated from the system.

On the other hand, for example, Japanese Patent Publication No. 3-70873 and Japanese Unexamined Patent Publication No.
As disclosed in No. 89637, it is a magnetic recording medium in which predetermined inspection information is recorded, and it is loaded into a drive device to be inspected and it is only checked whether or not the inspection information can be reproduced by the device. There is also known a medium capable of easily inspecting a drive device for abnormality. But,
These media are used for inspecting errors in the reproducing system of the drive device, especially in the mounting position accuracy and feeding accuracy of the magnetic head. Although effective for these inspections, drive system abnormality in the drive device Not suitable for inspecting for

The present invention has been made in view of the above circumstances, and it is an object of the present invention to determine the presence / absence of an abnormality in a drive system of a drive device without using a special measuring machine and in a state in which the drive device is incorporated in the system. However, it is to provide a drive system inspection medium that can be easily inspected.

[0007]

In order to achieve the above object, the drive system inspection medium of the present invention has magnetically recorded inspection information for testing whether it can be reproduced by the drive device to be inspected. A recording unit is provided, and the inspection information is recorded by setting the recording rotation speed at the time of recording this information to a value different from the reference value.

Specifically, a plurality of the recording units are provided, and the inspection information recorded in each recording unit is recorded by setting the recording rotation speed to a different value. Is.

In the present invention, the "recording rotational speed" means the rotational speed of the disk medium at the time of recording, and is the same as the rotational speed of the drive motor in a general drive device that rotates the medium using the drive motor.

How much the recording rotation speed is set to a value different from the reference value may be appropriately determined in consideration of the accuracy required for the drive device to be inspected. If there is a possibility that the rotational speed of the drive system of the drive device may deviate from the reference value in both the increasing direction (+ direction) and the decreasing direction (-direction), the recording rotational speed may be deviated from the reference value. It is preferable to shift the setting in ± both directions, but if there is a tendency to shift in only one direction, set the recording rotation speed by shifting it in the opposite direction from the shift direction with respect to the reference value. May be.

Further, it is more convenient to record control software for reproducing the inspection information and determining whether or not a read error has occurred in the medium together with the inspection information.

[0012]

In the drive system inspection medium of the present invention, since the inspection information is recorded at the recording rotational speed different from the reference value, there is an abnormality in the drive system in the drive device to be inspected. If there is an error in the number of rotations, the error is amplified between the medium and the medium, so that it is difficult to reproduce the inspection information of the loaded inspection medium, and the read error easily occurs. By simply observing whether or not this read error occurs, it is possible to easily inspect whether or not there is an abnormality in the drive system in the drive device to be inspected.

As described above, according to the drive system inspection medium of the present invention, the presence or absence of abnormality in the drive system of the drive device is inspected by simply loading the medium into the drive device and checking whether or not the inspection information can be reproduced. Therefore, it is not necessary to use a special measuring instrument and the inspection is extremely easy, and the inspection can be performed even after the drive device is installed in a personal computer or the like. Further, unlike the conventional magnetic recording medium for inspection, it is determined whether or not there is an abnormality in the drive device by setting the recording rotation speed to a value different from the reference value and reproducing the recorded inspection information. Therefore, it is particularly suitable for the inspection of the presence or absence of abnormality of the drive system in the drive device.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a magnetic disk as an embodiment of the magnetic recording medium for inspection of the present invention. The illustrated magnetic disk 10 is a disk-shaped floppy disk having a magnetic material coated on a PET substrate, and the disk surface has
A plurality of tracks are formed along the radial direction from the innermost track 11 to the outermost track 12 according to a predetermined disc format.

FIG. 2 is a diagram showing the structure of part of the innermost track 11. In FIG. 2, the arcuate track is shown as a straight line.

As shown in the drawing, the innermost track 11 has a first recording section divided in the circumferential direction of the magnetic disk 10.
Four sectors, sector 21, second sector 22, third sector 23, and fourth sector 24 are formed. Each sector 21-24
Is further divided into an ID section 31 and a data section 32.
Address information such as a track number and a sector number is magnetically recorded as inspection information in the D section 31.

The recording of the address information in the ID portion 31 of each sector 21 to 24 makes it possible to accurately shift the rotational speed of the magnetic disk 10 as a recording rotational speed by a desired value with respect to a reference value. This is done using a dedicated magnetic disk device. In this embodiment, the address information is recorded by setting the rotation speed of the magnetic disk 10 to a value of + 3% of the reference value in the first sector 21, and similarly in the second sector 22, + 2% and the third sector 23. In the fourth sector 24, the address information is recorded by shifting the recording rotational speed from the reference value by -2%. It should be noted that only the recording rotation speed is changed upon recording, and the other data formats are unified to those normally used. It should be noted that how much the recording rotation speed is set with respect to the reference value and how many sectors are provided are not limited to this example, and may be appropriately determined in consideration of inspection accuracy and the like.

Next, a method of inspecting a drive system in a magnetic disk device using the magnetic disk 10 having the above-mentioned structure will be described. The inspection is carried out by mounting the magnetic disk 10 on the magnetic disk device to be inspected and whether or not the address information recorded in each of the above sectors 21 to 24 can be reproduced. Whether or not there is an abnormality in the drive system and the extent of the abnormality are determined in consideration of which sector information can be reproduced and which sector information cannot be reproduced and a read error occurs.

For example, when a read error occurs only in the first sector 21, the rotational speed of the drive system of the magnetic disk device to be inspected is slightly smaller than the reference rotational speed,
It is possible to judge that. Note that all sectors
If the address information of 21 to 24 is reproduced, it is judged that the drive system is normal, but if the address information of all the sectors 21 to 24 is not reproduced together, other drive system etc. It is preferable to determine whether or not there is an abnormality in the drive system in consideration of whether or not there is any abnormality in the part.

Although one embodiment of the drive system inspection medium according to the present invention has been described above, the drive system inspection medium according to the present invention is not limited to the specific mode of the embodiment, and various modifications can be made. It is possible to

For example, in the above embodiment, the address information recorded in the ID part of each sector is used as the inspection information, but any information may be recorded in the data part as the inspection information. When the address information of the ID part is used as the inspection information as in the above embodiment, the data part may not be provided. Even in that case, the read error due to the absence of the data portion can be excluded by making a determination based on the error code of the magnetic disk device.

Further, although the above-mentioned embodiment is one in which the present invention is applied to a floppy disk, the present invention is intended for inspecting a drive system in various medium exchange type drive devices.
It can be applied to various magnetic recording media used in these devices.

[Brief description of drawings]

FIG. 1 is a plan view of a magnetic disk.

FIG. 2 is a diagram showing a partial configuration of an innermost track.

[Explanation of symbols]

 10 magnetic disk 11, 12 tracks 21, 22, 23, 24 sectors 31 ID section 32 data section

Claims (2)

[Claims] 1. A magnetic recording medium for inspection mounted in a drive device for inspecting the presence or absence of an abnormality in a drive system in a drive device for reproducing information recorded on a magnetic recording medium, the inspection target magnetic recording medium being The recording medium is provided with a recording unit for recording the inspection information to be tested whether or not it can be reproduced by the drive device, and the inspection information has a recording rotational speed at the time of recording the information different from the reference value. A drive system inspection medium characterized by being set and recorded. 2. A plurality of recording units are provided, and the inspection information recorded in each recording unit is recorded by setting the recording rotation speeds to different values. Item 3. The drive system inspection medium according to Item 1.