JPS63117353A - Inspecting method for life of magneto-optical disk - Google Patents

Abstract

PURPOSE:To accurately inspect the life of a magneto-optical disk by performing a series of inspecting operations repeatedly up to the number of times specified as an upper limit with respect to a specified track. CONSTITUTION:An inspection signal is recorded on the specified track on the magneto-optical disk and reproduced to check the recording state as a 1st inspection; and recording contents of the track are erased and the track is reproduced to check the unerased signal state as a 2nd inspection. Those inspecting operations are performed repeatedly up to the number of times specified as the upper limit as to the specified track. Namely, if the disk comes to the end of its life before the series of inspecting operations are performed by an many times as specified, a record leak, etc., is detected by checking the unerased signal state thereafter. Further, the unerased record contents are also detected by checking the unerased record state thereafter. If the disk does not come to the end of its life even after the series of inspecting operations are performed by as many times as specified, neither the record leak nor unerased record is detected in each checking operation. Thus, the life of the disk is accurately checked by detecting the record leak or unerased record contents.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for inspecting the lifespan of a magneto-optical disk.

[Conventional technology]

A magneto-optical disk exists as a type of readable/writable optical disk. In the case of magneto-optical disks, they cannot be read and written indefinitely, and they have a certain lifespan. Therefore,
It is preferable to conduct a lifespan test as a quality inspection during the manufacturing process of magneto-optical disks to accurately predict the lifespan.

However, until now, there has been no suitable method for inspecting the lifespan of magneto-optical disks.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a method for inspecting the lifespan of a magneto-optical disk by which the lifespan can be appropriately determined.

[Means for solving problems]

The inspection method according to the present invention includes specifying a specific track to be inspected, specifying the number of times the inspection is to be repeated, recording an inspection signal on the specified track on the magneto-optical disk, and reproducing and recording the inspection signal. A series of tests consisting of a first test to check the status and a second test to erase the recorded content on the track, play it back, and check the status of the remaining data are performed on the specified track as specified above. Repeated execution up to the number of times specified,
It is characterized by consisting of.

[Effect]

If the disk reaches the end of its lifespan after completing a series of inspections a specified number of times, recording omissions, etc. will be detected in subsequent recording status checks, or recordings will be deleted in subsequent recording status checks. Unerased content is detected. On the other hand, if the disk does not reach the end of its lifespan by the time the series of inspections is completed a specified number of times, no recording omissions or unerased data will be detected during each check.

Therefore, the lifespan of the disc can be accurately checked depending on whether recording leakage or unerased data is detected.

〔Example〕

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

FIG. 1 shows an embodiment of the inspection method (an example of the inspection procedure) according to the present invention. This procedure is performed using the inspection device 1 shown in Figure 2.
It is assumed that the microcomputer 11 included in fflo is programmed and executed according to the program.

First, in step 101, a track to be inspected on the magneto-optical disk is designated by the host device 12 of the inspection device 10.

Next, in step 102, the host device 12 specifies the number of times the test is to be repeated.

Subsequently, in step 103, the number of times the test has been completed at which the test should be temporarily stopped is determined by the host device i! 12. This designation is based on the fact that lifespan inspections are usually not completed in one day.
This is done in order to automatically stop the test when night falls during repeated tests.

After completing each of the above specifications, the inspection is started by rotating the magneto-optical disk 13 to be inspected in step 104, and as the first step of the inspection, in step 105, the specified track of the disk (the track specified in step 101) is rotated. Record the test signal.

Next, in step 106, as the second step of the inspection, the recorded contents of the designated track are reproduced and the recording status is checked (detection of recording omissions, etc.).

Subsequently, in step 107, as the third step of the inspection,
Erase the recorded contents of the specified track.

Subsequently, in step 108, as a fourth step of the inspection,
The designated track is played back and the status of remaining erased data is checked.

After completing the series of tests consisting of steps 105 to 108, it is determined in step 109 whether or not the test has been completed the number of times that should be stopped (the number of times specified in step 103). If not digested, go to step 11
0, and it is determined whether the test has been completed the number of times the test should be repeated (the number of times specified in step 102). If it has not been consumed, the process returns to step 105 and the inspections of steps 105 to 108 are repeated for the specified l-rack.

The test is repeated in this way, and when the test has been completed the number of times that should be stopped (i.e., when night comes, as described above), the process proceeds from step 109 to step 111, and the rotation of the disk is stopped. Interrupt the inspection. Then, in step 112, it is determined whether an inspection start command has been issued. If it has not occurred, return to step 111,
Maintain suspension of inspection. When an order to start inspection is issued,
Step 112 returns to step 105, and the inspection of steps 105 to 108 is restarted for the specified track.

In addition, when the inspection is repeated in this way and the inspection is completed the number of times that the inspection should be repeated, the process proceeds from step 110 to step 113 to output the unerased contents of the designated track, and then in step 114 the disk rotates. Stop and finish the inspection.

In the above inspection, if the life of the disk reaches the end of the inspection several times until the inspection in steps 105 to 108 is completed as many times as the inspection should be repeated, then the recording status check in step 106 from then on will detect recording omissions, etc. is detected,
Alternatively, unerased data is detected in the unerased state check in step 108 after that time. On the other hand, if the life of the disk does not come to an end before the tests in steps 105 to 108 are completed the number of times the test should be repeated, step 106
．． No recording omissions or unerased data are detected in the check in step 108.

Therefore, the lifespan of the disc can be accurately checked depending on whether or not this recording leakage or unerased data is detected.

In this embodiment, the test is completed until the end (that is, the number of times the test is repeated) regardless of whether recording omissions or unerased data are detected in the checks at steps 106 and 108. However, if a recording omission or an unerased error is detected in the checks in steps 106 and 108, the inspection may be terminated at that stage (this is referred to as the second mode). Furthermore, it may be possible to select whether to perform the inspection in the first mode or the second mode by an instruction from the host device 12 or by operating the mode selection means 14.

Further, in this embodiment, both the designation of the track to be inspected and the designation of the number of times the inspection is to be repeated are performed by the host device 12, and the inspection track designation means 15. A repeat count designating means 16 may be provided.

〔Effect of the invention〕

As described above, according to the inspection method according to the present invention.

It is possible to accurately test the lifespan of a magneto-optical disk.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing an embodiment of the testing method (an example of testing procedure) according to the present invention, and FIG. 2 is a block diagram showing an example of a circuit configuration used to carry out the testing method shown in FIG. It is. 10... Inspection device, 11... Microcomputer. 12... Host device, 13... Magneto-optical disk, 14...
...Mode selection means, 25...Inspection track designation means. 16...Means for specifying the number of repetitions Fig. 1

Claims (1)

[Claims] 1. Specifying a specific track to be inspected, specifying the number of times the inspection is to be repeated, recording an inspection signal on the specified track on the magneto-optical disk, and reproducing and recording the inspection signal. A first inspection to check the situation and erasing the recorded contents on the track,
A first-speed test consisting of a second test for reproducing this and checking the unerased state is repeatedly executed for the specified track up to the specified number of times. A method for inspecting the lifespan of magneto-optical disks. 2. A first mode in which the series of tests is repeated the specified number of times, and a second mode in which the repetition is terminated when an error is detected in the first or second test;
2. A method for inspecting the lifespan of a magneto-optical disk according to claim 1, wherein one of the following is selectable. 3. The designation of the number of times the test is to be repeated includes designation of the total number of repetitions and designation of the number of times the test should be temporarily suspended;
2. A lifespan testing method for a magneto-optical disk according to claim 1, wherein said series of tests is temporarily interrupted when the series of tests has been repeated the number of times that should be temporarily interrupted.