JPH10149556A - Cleaning time detecting method and detecting device of optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the maintainability and reliability of a device by checking the increment in the number of uses of alternate sectors when data are written on an optical disk, issuing a warning when the set value is exceeded and performing the cleaning of the device at a proper time. SOLUTION: A cleaning detector is composed of a write demanding part 11 in a central processor 10, an acquisition part of a number of use of alternate sectors, comparator part 12, 13, a message output part 14, a data write part 21 in an optical disk device, an alternate sector saving part 22 and an alternate sector counting part 23. This device acquires the used number of alternate sectors before writing of data and the used number of alternate sectors before writing of data. The difference between the used number of alternate sectors before and after writings is found, the increasing number of alternate sectors is calculated and cleaning warning message is outputted when the increased number exceeds a prescribed number previously set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for detecting a cleaning timing for detecting a stain on an optical disk or an optical head and issuing a cleaning request in the optical disk device.

[0002]

2. Description of the Related Art Since an optical disk apparatus utilizes laser light, data defects are likely to occur due to dirt on an optical disk (optical disk medium) and an optical head (optical head).
For this reason, it is essential to maintain the reliability of data by cleaning the optical disk and the optical head.

[0003] As a conventional cleaning method for an optical disk or an optical head of an optical disk apparatus, data is written in sector units, and then the data is read out to read an error correction code (ECC: ERROR CORRECT COD).
E) to perform a check, or when reading the data, perform an ECC check on the read data,
A sector in which an uncorrectable error has occurred is regarded as a bad sector,
When a predetermined number or more of the defective sectors occur, a method is adopted in which it is determined that the optical disk medium or the optical head is dirty and a cleaning request is issued. As another method, a method is employed in which a complicated mechanism such as a sensor function is provided for detecting dirt on the optical disk medium, and the dirt is detected by checking the optical disk medium of the optical disk device with a sensor.

[0004] In the former method, when there is dirt in one location, the number of defective sectors is increased every time the dirty location is accessed, and the number of defective sectors is increased. However, there is a problem that there is a high possibility that a cleaning request is generated even though the cleaning is unnecessary. Further, in the latter method, since a mechanism for judging dirt is incorporated in the apparatus itself, there is a problem that it is not suitable for reducing the size and weight of the apparatus and the cost increases.

[0005] To solve these problems, Japanese Patent Laid-Open No.
Japanese Patent No. 30332 discloses a method for detecting the contamination of an optical disk medium or an optical head without using a special sensor mechanism for determining the contamination, thereby accurately determining whether or not cleaning is necessary. When an uncorrectable error occurs in the user area used by the user, the sector of the user area in which the uncorrectable error has occurred is allocated to a spare area of the optical disk medium, and the address of the defective sector in which the uncorrectable error has occurred in the user area is assigned. Replacement map creating means for sequentially writing the assigned sector address of the replacement area to the replacement map area of the optical disc medium; range setting means for setting a predetermined range adjacent to the defective sector in the user area where an uncorrectable error has occurred; The number of all the bad sectors existing in the predetermined range set by the range setting means is determined by the replacement. A counting means for searching and counting the map; and a comparing means for comparing the count number counted by the counting means with a predetermined value, detecting contamination when the count value exceeds the predetermined value, and issuing a cleaning request. There is disclosed a dirt detection system for an optical disk device.

[0006]

In the above-described dirt detection system for an optical disk apparatus, the optical disk medium is determined to be dirty when the number of replacement sectors reaches a predetermined number. There is a problem that writing to the medium becomes impossible.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the conventional dirt detection system of an optical disk apparatus by examining the increase in the number of replacement sectors used when writing data to the optical disk. Provided is an optical disk device cleaning timing detection method and an optical disk device cleaning timing detection device with improved maintainability and reliability by enabling a cleaning request of an optical disk device to be made at an appropriate time by determining dirt. Is to do.

[0008]

According to the present invention, there is provided a method for detecting a cleaning time of an optical disk apparatus, comprising the steps of: checking the number of replacement sectors before and after writing data to an optical disk; and cleaning the replacement sector when the increase exceeds a predetermined number. This includes outputting a warning message.

That is, in the method for detecting a cleaning time of an optical disk device according to the present invention, when a request for writing data to an optical disk is made, the number of used alternate sectors before the writing of the data is obtained as a first number of used alternate sectors. After writing the data, the number of replacement sectors used is obtained again as the second replacement sector usage number, and the difference between the first replacement sector usage number and the second replacement sector usage number is obtained to determine the number of replacement sectors. And outputting a cleaning warning message when the replacement sector increase number exceeds a predetermined number set in advance.

According to another aspect of the present invention, there is provided a cleaning time detecting device for an optical disk device, comprising: a writing request unit for outputting a data writing request to the optical disk; a data writing unit for writing data to the optical disk in response to the data writing request; A replacement sector evacuation unit that performs evacuation to a replacement sector of the optical disk when requested by a writing unit; a replacement sector count unit that counts the number of operations of the replacement sector evacuation unit; A replacement sector use number acquisition unit for acquiring the number of uses, and a difference between the acquisition values of the replacement sector use number acquisition unit before and after the output of the data write request to the optical disk is determined and compared with a predetermined number set in advance. Message is output when the difference between the acquired values exceeds the predetermined number. A replacement sector use number comparison unit that outputs a request signal; and a message output unit that outputs a cleaning warning message to a display in accordance with the message output request signal. In particular, the data write request unit and the replacement sector A use number acquisition unit, the replacement sector use number comparison unit, and the message output unit are provided in a central processing unit, and the data writing unit, the replacement sector saving unit, and the replacement sector counting unit are provided in an optical disc device. is there.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a cleaning time detecting device for an optical disk device according to the present invention, and FIG.
3 is a flowchart showing the operation of the embodiment of FIG.

The embodiment shown in FIG. 1 includes a data write request unit 11, a replacement sector use count acquisition unit 12, a replacement sector use count comparison unit 13, and a message output unit 14 provided in a central processing unit 10, and an optical disc drive 20. And a replacement sector saving unit 22 and a replacement sector counting unit 23.

The data write request section 11 outputs a data write request signal 1 to the optical disk device 20.

The data writing section 21 writes the received data on the optical disk when the data write request signal 1 is received. If a bad sector is found when writing the received data to the optical disk, the data writing unit 21 notifies the replacement sector saving unit 22 of the finding.

Upon receiving a notification from the data writing unit 21, the replacement sector saving unit 22 performs a process of writing data to be written to the defective sector to the replacement sector (save of the replacement sector). The replacement sector saving section 22 notifies the replacement sector counting section 23 of the fact each time the replacement sector is used.

The replacement sector counting unit 23 accumulates and counts the number of replacement sectors used each time there is a notification from the replacement sector saving unit 22.

When the data write request unit 11 outputs a data write request signal 1 to the optical disk device 20, the replacement sector use number acquisition unit 12 sends a replacement sector use number request signal to the replacement sector count unit 23. The number of replacement sectors before the data write operation is performed is obtained by the replacement sector use number signal 2, and when a series of data writing to the optical disk is completed, the replacement sector usage number request is sent to the replacement sector count unit 23. By transmitting the signal, the replacement sector count number used by the replacement sector counting unit 23 is obtained again by the replacement sector use number signal 2. The replacement sector use number acquisition unit 12 sends these values to the replacement sector use number comparison unit 13.

The replacement sector use number comparison unit 13 calculates a difference between the counts of the replacement sectors before and after data writing sent from the replacement sector use number acquisition unit 12, and compares the difference with a preset value (predetermined number). Compare. If the difference between the counts of the replacement sectors is larger than a predetermined number, a message output request signal is output to the message output unit 14.

When the message output unit 14 receives the message output request signal from the replacement sector use number comparison unit 13, it sends a signal to the display 30 to display a cleaning warning message.

Next, the operation of the cleaning time detecting device for an optical disk device configured as described above will be described with reference to FIG.

When outputting a data write request signal 1 from the data write request unit 11 to the optical disk device 20 for writing data, the data write request unit 11
Notifies the replacement sector use number acquisition unit 12 of the fact (step 41).

Upon receiving this notification, the replacement sector use number acquisition unit 12 sends a replacement sector use number request signal to the replacement sector count unit 23 to replace the count number of the replacement sector before performing the data write operation. Sector use number signal 2
(Step 42).

On the other hand, upon receiving the data write request signal 1, the data write section 21 starts to write the received data to the optical disk. If a bad sector is found during the data write operation, the data write section 21 notifies the replacement sector. The evacuation unit 22 is notified. Upon receiving the notification from the data writing unit 21, the replacement sector saving unit 22 performs a process of writing data to be written to the defective sector to the replacement sector.
The replacement sector saving section 22 notifies the replacement sector counting section 23 of the fact each time the replacement sector is used. The replacement sector counting unit 23 accumulates and counts the number of replacement sectors used each time there is a notification from the replacement sector saving unit 22 (step 43).

When the writing of the received data by the data writing unit 21 and the writing process to the replacement sector by the replacement sector saving unit 22 are completed, the replacement sector use number acquisition unit 12
Sends a replacement sector use number request signal to the replacement sector count unit 23 again, obtains the count of the used replacement sectors from the replacement sector count unit 23 by the replacement sector use number signal 2, and outputs the data obtained earlier. The replacement sector count is sent to the replacement sector use number comparison unit 13 together with the count of the replacement sectors before writing (step 44).

The replacement sector use number comparison unit 13 receiving these data calculates a difference between the count numbers of the replacement sectors before and after the data writing and compares the calculated count value with a preset value. If it is larger than the count and the difference is larger than a predetermined number, the message output unit 1
Then, a message output request signal is output to step 4 (step 45).

When the message output unit 14 receives the message output request signal from the replacement sector use number comparison unit 13, it sends a signal to the display 30 to display a cleaning warning message and ends the processing (step 46).

In step 45, if the difference between the subsequent count number and the previous count number is smaller than a predetermined number, the process is terminated without outputting a message output request signal to the message output unit 14.

As described above, the number of replacement sectors used before and after writing data to the optical disk is compared,
If the increase in the number of use of the replacement sectors after data writing is larger than a predetermined number, it is determined that the optical disk or the optical head is dirty, and a cleaning warning message is displayed on the display, so that the replacement sector is displayed. Cleaning request can be made at an appropriate time before the number reaches the predetermined number.

[0030]

As described above, the method and the apparatus for detecting the cleaning time of the optical disk apparatus according to the present invention are:
When a request to write data to the optical disk is made, the number of replacement sectors used before writing data and the number of replacement sectors used after writing data are obtained,
The number of replacement sectors is calculated by calculating the difference, and a cleaning warning message is output when the increase number of replacement sectors exceeds a predetermined number set in advance. There is an effect that it is possible to make a cleaning request at an appropriate time before reaching the predetermined number, and thus it is possible to improve the maintainability and reliability of the optical disk device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a cleaning time detecting device for an optical disk device according to the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of FIG.

[Explanation of symbols]

 Reference Signs List 1 data write request signal 2 replacement sector use number signal 10 central processing unit 11 data write request unit 12 replacement sector use number acquisition unit 13 replacement sector use number comparison unit 14 message output unit 20 optical disk device 21 data write unit 22 replacement sector save unit 23 Replacement sector counting section 30 Display 41 to 46 steps

Claims (4)

[Claims] 1. An optical disk apparatus according to claim 1, further comprising the step of checking the number of replacement sectors before and after writing data to the optical disk, and outputting a cleaning warning message when the number of replacement sectors exceeds a predetermined number. Cleaning time detection method. 2. When a data write request is made to an optical disk, the number of use of the replacement sector before writing the data is obtained as a first replacement sector use number, and after the data is written, the replacement sector is used again. The used number is acquired as the second spare sector use number, and the difference between the first spare sector use number and the second spare sector use number is calculated to calculate the spare sector increase number, and the spare sector increase number is set in advance. And outputting a cleaning warning message when a predetermined number is exceeded. A write request unit for outputting a data write request to the optical disk; a data write unit for writing data to the optical disk in response to the data write request; A replacement sector evacuation unit for performing evacuation to the replacement sector of the optical disc; a replacement sector counting unit for counting the number of operations of the replacement sector evacuation unit; An acquisition unit, and a difference between the acquisition values of the replacement sector use number acquisition unit before and after the output of the data write request to the optical disc is obtained and compared with a predetermined number set in advance, and the difference between the acquisition values is the predetermined number. A replacement sector use number comparison unit that outputs a message output request signal when the A message output unit for outputting a cleaning warning message to a display in response to a message output request signal. 4. A central processing unit having the data write request unit, the replacement sector use number acquisition unit, the replacement sector use number comparison unit, and the message output unit, wherein the data write unit, the replacement sector save unit, 4. The apparatus according to claim 3, wherein the replacement sector counting unit is provided in the optical disk device.