JP2012208981A - Optical disk playback method, optical disk device and optical disk library device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evaluate the deterioration states of an optical disk and an optical drive in an optical disk library device.SOLUTION: A specific area of an optical disk is played back in a combination of a first optical disk and a first optical drive to measure a first playback error rate, if equal to or more than a predetermined threshold, a second playback error rate is measured in a combination of a second optical disk and the first optical drive, a third playback error rate is measured in a combination of the first optical disk and the second optical drive, and deteriorated states of the first optical disk and the first optical drive are evaluated on the basis of the second and third playback error rates.

Description

  The present invention relates to an optical disk device, and more particularly to a method for evaluating the deterioration state of each optical disk device in an optical disk library device having a plurality of optical disk devices.

  As a background art, for example, there is a technique described in Patent Document 1. Patent Document 1 states that “a disc playback device determines media deterioration based on an error rate. That is, when the error rate becomes a value equal to or greater than a predetermined threshold per unit time, a signal instructing backup is generated. Is done. "

JP 2006-1634332 A

  The hard disk device supports a self-monitoring function (referred to as Self-Monitoring, Analysis and Reporting Technology, SMART) for evaluating the deterioration of the device in a standard after ATA3. Since the drive unit is inseparable, it is not necessary to separate the media unit and the drive unit when evaluating deterioration.

  However, in the optical disk device, the optical disk as a medium can be separated from the optical disk device (hereinafter, the optical disk device is referred to as an optical drive in order to clarify the distinction between the optical disk and the optical disk device). It is necessary to evaluate degradation and degradation of the optical drive individually.

  In particular, in an optical disc library apparatus that is a large-capacity information storage device including a rack that holds a plurality of optical discs, a plurality of optical drives, and a changer mechanism that conveys a predetermined optical disc from the rack to a predetermined optical drive. In order to ensure and maintain reliability, it is important to evaluate and manage the deterioration state of each optical disk and each optical drive.

  As a technique for evaluating the deterioration state of an optical disk with an optical drive, there is the above-mentioned Patent Document 1, but the deterioration of the optical drive is not taken into consideration, and a plurality of optical drives like the above-described optical disk library apparatus are not considered. Recording / reproducing with any combination of a plurality of optical discs was not considered.

  An object of the present invention is to make it possible to evaluate the deterioration state of an optical drive in an optical disk library apparatus.

In order to solve the above-described object, the present invention uses the configuration described in the claims as an example.

  According to the object of the present invention, it is possible to evaluate the deterioration state of the optical drive in the optical disc library apparatus.

Flowchart of optical disk and optical drive deterioration evaluation process in the first embodiment Block diagram of the optical disk library apparatus in the first embodiment Block diagram of optical drive in first embodiment Configuration diagram of optical disc in first embodiment Record format of optical drive monitoring database in the first embodiment Record format of optical disc monitoring database in the first embodiment Flowchart of optical disk and optical drive deterioration evaluation process in the second embodiment Flowchart of optical drive deterioration evaluation process in the third embodiment

  Embodiments of an optical disk library device according to the present invention will be described below with reference to the drawings.

  The configuration and operation of the optical disc library apparatus as the first embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a block diagram of the optical disc library apparatus in the first embodiment. The optical disk library apparatus 10 of this embodiment includes a library control unit 11, a changer mechanism 12, a rack 13 for storing a plurality of optical disks 40, a host interface 14, a drive interface 15, an optical drive monitoring unit 16, and an optical disk monitoring. The database 17, the optical drive monitoring database 18, and a plurality of optical drives 30 are configured.

  The optical disc library apparatus 10 is connected to the host computer 20 via the host interface 14, receives various commands such as recording and reproduction and data to be recorded, and transmits the execution result of the command and the reproduced data.

  The rack 13 includes a plurality of slots, and one optical disk 40 can be stored in each slot.

  The library control unit 11 has a function of controlling the overall operation of the optical disc library apparatus 10, operates the changer mechanism 12, takes out a predetermined optical disc 40 from the rack 13, transports it to a predetermined optical drive 30, and loads it. . Or conversely, the optical disk 40 ejected from the predetermined optical drive 30 is transported to and stored in a predetermined slot of the rack 13. In addition, it is connected to each optical drive 30 via the drive interface 15, and transmits various commands such as recording and reproduction and data to be recorded to a predetermined optical drive 30, and the execution result of the command and the reproduced data and Self-monitoring information described later is received. Further, the deterioration state of each optical drive 30 and each optical disk 40 is monitored via the optical drive monitoring unit, and processing corresponding to the deterioration state is performed.

  Based on the self-monitoring information received from the library control unit 11, the optical drive monitoring unit 16 evaluates and manages the deterioration state of all optical disks 40 stored in the rack 13 and the deterioration state of all optical drives 30. It has a function to do. The evaluation result is passed to the library control unit 11.

  The optical disk monitoring database 17 is a database for the optical drive monitoring unit 16 to manage the state of each optical disk 40. Similarly, the optical drive monitoring database 18 is the optical drive monitoring unit 16 to manage the state of each optical drive 30. It is a database for doing. In any database, the optical drive monitoring unit 16 updates and reads records.

  FIG. 3 is a block diagram of the optical drive 30 in the first embodiment. The optical drive 30 of this embodiment includes a drive control unit 31, an optical pickup 32, a drive memory 33, a controller interface 34, a self-monitoring information recording unit 35, a disk rotation mechanism 50, a slider mechanism 51, a servo. The control unit 52, the servo signal generation unit 53, the reproduction signal generation unit 54, the reproduction signal binarization unit 55, the encoding unit 56, and the decoding unit 57 are configured.

  The drive control unit 31 controls the overall operation of the optical drive 30. That is, the seek control and the feed control for controlling the rotation of the optical disk 40 mounted on the disk rotation mechanism 50 via the servo control unit 52 and driving the slider mechanism 51 to displace the optical pickup 32 in the radial direction of the optical disk 40. Then, the objective lens of the optical pickup 32 is driven to perform focus control and tracking control.

  Further, the drive control unit 31 controls the laser emission of the optical pickup 32. At the time of recording, a recording data signal sent from the library control unit 11 via the controller interface 34 is converted into an NRZI signal according to a predetermined modulation rule by the encoding unit 56 and supplied to the drive control unit 31. Is converted into a recording strategy (light emission pulse train) corresponding to the NRZI signal, and the laser is emitted with a predetermined light intensity and pulse train.

  The amount of light reflected from the optical disk 40 is received by the photodetector of the optical pickup 32 and converted into an electrical signal, which is sent to the servo signal generator 53 and the reproduction signal generator 54. The servo signal generation unit 53 selects and generates various servo signals by a detection method suitable for the mounted optical disk 40, and supplies it to the drive control unit 31. The servo signal includes at least a focus error signal and a tracking error signal. Based on these servo signals, the drive control unit 31 drives the objective lens via the servo control unit 52 as described above to operate the focus servo and tracking servo.

  The reproduction signal generation unit 54 includes a waveform equalization circuit and an A / D converter. The analog reproduction signal supplied from the optical pickup 32 is sampled and quantized after predetermined waveform equalization. Is converted into a digital signal and supplied to the reproduction signal binarization unit 55.

  The reproduction signal binarization unit 55 includes a transversal filter and a Viterbi decoding circuit. The digital signal supplied from the reproduction signal generation unit 54 is equalized to a predetermined PR class by a transversal filter, and maximum likelihood decoding is performed by a Viterbi decoding circuit, and this equalized waveform is converted into an NRZI signal based on a predetermined modulation rule. Convert. The NRZI signal generated by the reproduction signal binarization means 55 is converted into a reproduction data signal by performing a data correction process or the like by the decoding unit 57 and sent to the library control unit 11 via the controller interface 34. Further, the decoding unit 57 has a function of notifying the number of corrections performed during correction processing, and can measure the reproduction error rate.

  Further, the drive control unit 31 controls the self-monitoring information recording unit 35 to collect the self-monitoring information of the optical drive 30 and record it in the drive memory 33 every time an event related to each self-monitoring information occurs. The self-monitoring information includes the use of the optical drive such as the power-on time of the optical drive 30, the laser emission time, the laser emission differential efficiency (IL characteristic inclination), the number of reproduction blocks, the number of recording blocks, and the seek distance of the optical pickup 32. Various data relating to history, status, and performance, and particularly in the present embodiment, includes a reproduction error rate of a disk monitoring area 46 described later. Although detailed description is omitted, the self-monitoring information includes information acquired at any time during the operation of the optical drive 30 and information acquired by executing a predetermined test in accordance with a test execution command from the host.

FIG. 4 is a configuration diagram of the optical disc 40 in the first embodiment. In order to simplify the description, a BD-R of SL (Single Layer) is shown as an example.
The optical disc 40 is roughly divided into three areas, a lead-in area 41 in which various types of information such as disc information are recorded, a data zone area, and a lead-out area 44. The data zone area further includes an inner circumference. A spare area 42 on the side, a user data area 43 for recording user data, and a spare area 42 on the outer periphery side.

  The lead-in area 41 includes a disk management area 45 that updates and records the management information of the recording state for each recording update. A disk monitoring area 46 is provided in the spare area 42 on the inner circumference side. In the disk monitoring area 46, when the optical disk 40 is loaded into any one of the optical drives 30 for the first time, predetermined data is recorded as part of the initialization process. In the present embodiment, the disk monitoring area 46 is arranged closer to the user data area 43 so as not to divide the replacement area arranged in the spare area 42.

  A processing operation in which the optical disk library apparatus of the first embodiment evaluates the deterioration state of the optical disk and the optical drive will be described. FIG. 1 is a flowchart of an optical disk and optical drive deterioration evaluation process in the first embodiment.

  When the library control unit 11 receives a reproduction command from the host computer 20, the library control unit 11 performs a deterioration evaluation process in conjunction with the execution of the reproduction process. Here, it is assumed that a command for reproducing data recorded on the optical disc M having the disc ID M is received from the optical disc 40.

  The library control unit 11 selects the optical drive N with the drive ID N as the optical drive 30 for reproducing the optical disc M, and drives the changer mechanism 12 to load the optical disc M into the optical drive N in S10. In S101, a series of reproduction processing is performed, and user data is reproduced from the user data area 43 of the optical disc M.

  In S11, the optical drive N reproduces the disc monitoring area 46 of the optical disc M and measures the reproduction error rate. By fixing the data to be measured, it is possible to eliminate variations in the reproduction error rate due to variations in data recording quality. By the way, in the recording type optical disc, the deterioration of the recording data proceeds according to the number of times of reproduction, but it is considered that the number of times of reproduction is always larger than the user data by reproducing the disk monitoring area 46 every time. That is, it is expected that the deterioration on the disk is the fastest, and even if the deterioration is observed, it can be expected that the user data can be reproduced with sufficient reproduction quality. Is suitable. Note that if the reproduction error rate is measured after the series of reproduction processing in S101, an increase in the read start time can be suppressed.

  In S 12, the library control unit 11 ejects the optical disc M from the optical drive N. The ejected optical disk M is conveyed to the rack 13 by the changer mechanism 12.

  In S 13, the optical drive N updates the self-monitoring information and transmits it to the library control unit 11, and the library control unit 11 passes the received self-monitoring information to the optical drive monitoring unit 16. The self-monitoring information is recorded and updated in the drive memory every time an event corresponding to the type of information occurs while the optical drive N is operating.

  In S14, the optical drive monitoring unit 16 compares the reproduction error rate in the disk monitoring area 46 in the self-monitoring information with a predetermined threshold value.

  When the reproduction error rate is smaller, the optical drive monitoring unit 16 sets the deterioration warning flag to OFF in S15, and the optical disk monitoring database 17 and the optical drive monitoring database 18 respectively include deterioration warning flags in S23. Add a record. However, the deterioration warning flag corresponds to the reproduction error rate measured in S11 in the combination of the optical drive M and the optical disk N. The deterioration warning flag of the record recorded in the optical disk monitoring database 17 and the optical drive monitoring database The deterioration warning flag of the record recorded in 18 has the same contents.

  FIG. 5 shows a record format of the optical drive monitoring database in the first embodiment, which is composed of a drive ID, various self-monitoring information including a reproduction error rate of the disk monitoring area 46, and a deterioration warning flag. The self-monitoring information is an item related to the state of the drive such as a power-on time. Also, the disk ID at the time of acquiring the self-monitoring information is included in the record.

  On the other hand, FIG. 6 shows a record format of the optical disk monitoring database in the first embodiment, which is composed of a disk ID, various self-monitoring information including a reproduction error rate of the disk monitoring area 46, and a deterioration warning flag. The self-monitoring information is an item related to the state of the disc, such as a reproduction time. The drive ID at the time of acquiring the self-monitoring information is also included in the record.

  It is possible to record cumulative data such as the cumulative time and the number of loadings as a record. In that case, prior to recording the record, the optical drive monitoring unit 16 obtains the previous record regarding the optical disc M from the optical disc monitoring database 17 and performs a predetermined calculation on the self-monitoring information received this time. Similarly, the previous record related to the optical drive N is acquired from the optical drive monitoring database 18, and a predetermined calculation is performed on the self-monitoring information received this time.

  Next, in S24, the optical disk monitoring unit 16 passes the evaluation results of the deterioration states of the optical disk M and the optical drive N to the library control unit 11 and ends the deterioration state evaluation process.

  If the reproduction error rate in the disk monitoring area 46 is larger than the predetermined threshold value in S14 described above, the optical disk monitoring unit 16 sets the deterioration warning flag to ON in S16.

  Next, the optical disk monitoring unit 16 reads the previous record related to the optical disk M from the optical disk monitoring database 17 in S17, and reads the previous record related to the optical drive N from the optical drive monitoring database 18 in S18. However, if the previous record related to the optical drive N is a record for the optical drive N, it is read back to the record for other than the optical drive N, and if the previous record related to the optical drive N is a record for the optical disk M, the optical disc Read retroactively to records other than M.

  The optical disk monitoring unit 16 confirms the deterioration warning flag of the past record related to the optical disk M and the past record related to the optical drive N read in S17 and S18, and the deterioration warning flag is on only in the previous record related to the optical disk M in S19. In step S20, it is determined that the optical disk M is in a deteriorated state.

  If the degradation warning flag is on only in the previous record related to the optical drive N in S21, it is determined in S22 that the optical drive N is in a degraded state.

  In other words, when the reproduction error rate in the disk monitoring area exceeds the threshold in the combination of the optical disk M and the optical drive N, the optical drive can be used if the optical disk M is properly reproduced by any one of the optical drives 30 except the optical drive N. N is determined to be in a deteriorated state. Conversely, if the optical drive N can satisfactorily reproduce any one of the optical discs 40 except the optical disc M, it is determined that the optical disc M is in a deteriorated state.

  The case where the deterioration warning flags of the previous record related to the optical disk M and the previous record related to the optical drive N are both turned on can be generally eliminated by not using the optical disk 40 and the optical drive 30 determined to be in the deteriorated state. it can. Even if both are on, detailed description is omitted, but by using the optical disc 40 and the optical drive 30 that have not been determined to be in the past according to the second embodiment described later, It is possible to determine which deterioration.

  Hereinafter, as described above, records are added to the optical disk monitoring database 17 and the optical drive monitoring database 18 in S23, respectively, and the evaluation results of the deterioration states of the optical disk M and the optical drive N are passed to the library control unit 11 in S24. The state evaluation process ends.

  In the present embodiment, an example in which the deterioration state is determined based on the reproduction error rate of the specially provided disk monitoring area 46 is shown. However, the present invention is not limited to this, and if the same area is reproduced each time the disk is reproduced. Similarly, the effect of eliminating variations in the reproduction error rate due to variations in recording quality can be obtained. For example, it may be based on the reproduction error rate of the disk management area 45. In this case, each area can be expanded by allocating the disk monitoring area 46 to a replacement area or a user data area.

  Further, in determining the deterioration state of the optical disk and the optical drive, it is not based on the reproduction error rate alone, but using other self-monitoring information, for example, by calculating the power-on cumulative time from the power-on time, It can be combined with the process of determining deterioration when exceeding.

  In the present embodiment, an example in which the deterioration state is determined based on the reproduction error rate has been described. However, the present invention is not limited to this. Likelihood Sequence Error) is possible.

  Further, by adding a drive deterioration flag indicating a drive deterioration state to the record format of the optical drive monitoring database 17, and by determining that the optical drive 30 is in a deterioration state, the drive deterioration flag is turned on and a record is recorded. By referring to the latest record, it is possible to immediately confirm whether or not the optical drive is in a deteriorated state. Similarly, by adding a disk deterioration flag indicating the disk deterioration state to the record format of the optical disk monitoring database 18 and determining that the optical disk 40 is in a deterioration state, the disk deterioration flag is turned on and a record is recorded. By referring to this record, it is possible to immediately confirm whether or not the optical drive is in a deteriorated state.

  As described above, according to the first embodiment of the present invention, it is possible to evaluate the deterioration states of the optical disc and the optical drive in the optical disc library apparatus.

  FIG. 7 is a flowchart of an optical disk and optical drive degradation evaluation process in the second embodiment of the present invention. The configurations of the optical disc library apparatus, the optical drive, and the optical disc are the same as those in the first embodiment, and a description thereof will be omitted. This embodiment is different from the first embodiment in that it is configured without a deterioration warning flag.

  When the library control unit 11 receives a reproduction command from the host computer 20, the library control unit 11 performs a deterioration evaluation process in conjunction with the execution of the reproduction process. Here, it is assumed that a command for reproducing data recorded on the optical disc M having the disc ID M is received from the optical disc 40.

  The library control unit 11 selects the optical drive N with the drive ID N as the optical drive 30 for reproducing the optical disc M, and drives the changer mechanism 12 to load the optical disc M into the optical drive N in S10. In S101, a series of reproduction processing is performed, and predetermined user data is reproduced from the user data area 43 of the optical disc M.

  In S11, the optical drive N reproduces the disc monitoring area 46 of the optical disc M and measures the reproduction error rate.

  After the optical drive N performs a series of reproduction processes, the library control unit 11 ejects the optical disc M from the optical drive N in S12. The ejected optical disk M is conveyed to the rack 13 by the changer mechanism 12.

  In S 13, the optical drive N updates the self-monitoring information and transmits it to the library control unit 11, and the library control unit 11 passes the received self-monitoring information to the optical drive monitoring unit 16. The process up to this point is the same as in the first embodiment.

  Next, in S23, the optical drive monitoring unit 16 adds records to the optical disc monitoring database 17 and the optical drive monitoring database 18, respectively. The record format of the optical disc monitoring database 17 conforms to the format in the first embodiment shown in FIG. 6 except for the deterioration warning flag. The record format of the optical drive monitoring database 18 conforms to the format in the first embodiment shown in FIG. 5 except for the deterioration warning flag.

  In S14, the optical drive monitoring unit 16 compares the reproduction error rate in the disk monitoring area 46 in the self-monitoring information with a predetermined threshold value.

  If the reproduction error rate is smaller, the optical disk monitoring unit 16 passes the evaluation results of the respective deterioration states of the optical disc M and the optical drive N to the library control unit 11 and ends the deterioration state evaluation process in S24.

  If the reproduction error rate is larger as a result of the comparison in S14, the optical disc monitoring unit 16 notifies the library control unit 11. In S25, the library control unit 11 refers to the optical disk monitoring database 17 via the optical drive monitoring unit 16, and data is recorded in the disk monitoring area among the plurality of optical disks 40 other than the optical disk M. Then, the optical disk P with the disk ID P, which is a predetermined optical disk that has not been determined to be in a degraded state, is selected, and the changer mechanism 12 is driven and loaded into the optical drive N.

  In S26, the optical drive N reproduces the disk monitoring area 46 of the optical disk P, measures the reproduction error rate, and the library control unit 11 ejects the optical disk P from the optical drive N in S27. The ejected optical disk P is conveyed to the rack 13 by the changer mechanism 12.

  In S 13, the optical drive N updates the self-monitoring information and transmits it to the library control unit 11, and the library control unit 11 passes the received self-monitoring information to the optical drive monitoring unit 16.

  In S23, the optical drive monitoring unit 16 adds the respective records to the optical disk monitoring database 17 and the optical drive monitoring database 18.

  Again in S14, the optical drive monitoring unit 16 compares the reproduction error rate of the disk monitoring area 46 in the self-monitoring information with a predetermined threshold. Here, if the reproduction error rate is larger, it is determined in S22 that the optical drive N is in a deteriorated state.

  Next, in S <b> 28, the library control unit 11 refers to the optical drive monitoring database 18 via the optical drive monitoring unit 16, and among the plurality of optical drives 30 other than the optical drive N, it has been determined that the degradation state has occurred in the past. An optical drive Q having a drive ID Q, which is not a predetermined optical drive, is selected, and the changer mechanism 12 is driven to load the optical disk M into the optical drive Q.

  In S29, the optical drive Q reproduces the disk monitoring area 46 of the optical disk M, measures the reproduction error rate, and the library control unit 11 ejects the optical disk M from the optical drive Q in S30. The ejected optical disk M is conveyed to the rack 13 by the changer mechanism 12.

  In S 13, the optical drive Q updates the self-monitoring information and transmits it to the library control unit 11, and the library control unit 11 passes the received self-monitoring information to the optical drive monitoring unit 16.

  In S23, the optical drive monitoring unit 16 adds the respective records to the optical disk monitoring database 17 and the optical drive monitoring database 18.

  Again in S14, the optical drive monitoring unit 16 compares the reproduction error rate of the disk monitoring area 46 in the self-monitoring information with a predetermined threshold. Here, when the reproduction error rate is larger, it is determined in S20 that the optical disc M is in a deteriorated state.

  In S24, the optical disk monitoring unit 16 passes the evaluation results of the deterioration states of the optical disk M and the optical drive N to the library control unit 11 and ends the deterioration state evaluation process.

  In selecting the optical disk P, it is desirable that the period from the time when it is determined that the optical disk P is not deteriorated to the present is shorter. Similarly, in selecting the optical drive Q, it is desirable that the period from the time when it is determined not to be in a degraded state to the present is shorter. If there is no corresponding optical disk P or optical drive Q, it is necessary to separately search for the optical disk 40 and the optical drive 30 that are not deteriorated. Although details are omitted, as an example, the reproduction error rate in the disk monitoring area is measured with an arbitrary optical disk P and optical drive Q, and it is used if it is confirmed that it is below the threshold value. If not confirmed, change the combination and repeat.

  As described above, according to the second embodiment of the present invention, it is possible to evaluate the deterioration states of the optical disk and the optical drive in the optical disk library apparatus. In particular, immediately after detecting the deterioration state, it is possible to distinguish between the deterioration of the optical disk and the optical drive, and the influence of aging deterioration from the previous measurement can be eliminated.

  FIG. 8 is a flowchart of an optical drive deterioration evaluation process in the third embodiment of the present invention. The configurations of the optical disc library apparatus and the optical drive are the same as those in the first embodiment, and a description thereof is omitted. In this embodiment, the host computer 20 issues an instruction for evaluating the deterioration state of a predetermined optical drive 30 to the optical disk library apparatus, and a predetermined one of the optical disks 40 is a test disk for evaluating the deterioration state of the optical drive. This is different from the first and second embodiments.

  When the library control unit 11 receives a deterioration evaluation command from the host computer 20, it performs a deterioration evaluation process. Here, it is assumed that an instruction for evaluating the optical drive N is received.

  In step S31, the library control unit 11 drives the changer mechanism 12 to load the test disk into the optical drive N. The test disk is a reproduction-only disk having a predetermined disk monitoring area 46, and the disk monitoring area 46 is used for evaluation when the reproduction error rate becomes smaller than a predetermined threshold value for judging the deterioration state when reproduced by a normal optical drive 30. Data is recorded.

  In S32, the optical drive N reproduces the disk monitoring area 46 of the test disk and measures the reproduction error rate. By using a read-only optical disk, measurement can be performed without considering the deterioration of recorded data corresponding to the number of reproductions described above.

  In S <b> 33, the library control unit 11 ejects the test disk from the optical drive N. The ejected test disk is transported to the rack 13 by the changer mechanism 12.

  In S 13, the optical drive N updates the self-monitoring information and transmits it to the library control unit 11, and the library control unit 11 passes the received self-monitoring information to the optical drive monitoring unit 16.

  In S <b> 34, the optical drive monitoring unit 16 adds a record to the optical drive monitoring database 18. The record format of the optical drive monitoring database 18 conforms to the format in the first embodiment shown in FIG. 5 except for the deterioration warning flag, as in the second embodiment.

  Next, in S14, the optical drive monitoring unit 16 compares the reproduction error rate of the disk monitoring area 46 in the self-monitoring information with a predetermined threshold value. Here, if the reproduction error rate is larger, it is determined in S22 that the optical drive N is in a deteriorated state. Since the evaluation is performed using a specific test disk, it is possible to determine the deterioration of the optical drive without having to distinguish between the deterioration of the optical disk and the optical drive.

  In S24, the optical disk monitoring unit 16 passes the evaluation result of the deterioration state of the optical drive N to the library control unit 11 and ends the deterioration state evaluation process.

  Although detailed description is omitted, the deterioration state evaluation of the optical disk 40 can be determined based on the measured reproduction error rate by reproducing the disk monitoring area 46 with the optical drive 30 that is known not to be in the deteriorated state. It is.

  As described above, according to the third embodiment of the present invention, in the optical disk library apparatus, in particular, by using a reproduction-only test disk, it is possible to simplify the separation process of whether the optical disk or the optical drive is deteriorated, It is possible to easily evaluate the deterioration state of the optical disk and the optical drive.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of each embodiment.

  In addition, each of the above-described configurations may be configured such that some or all of them are configured by hardware, or are implemented by executing a program by a processor. Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. In practice, it can be considered that almost all the components are connected to each other.

  In addition, the Example described below can also be employ | adopted for this invention, for example.

  In the optical disc library apparatus 10, when a user or the like adds or changes the optical disc 40 or adds or changes the optical drive 30, the above-described evaluation threshold and / or evaluation index of the optical disc or optical drive is set to the optical disc or optical drive. It can be different depending on. The evaluation threshold and / or evaluation index corresponding to the optical disk or optical drive can be efficiently evaluated by registering in advance in the firmware of the optical disk library.

DESCRIPTION OF SYMBOLS 10 ... Optical disk library apparatus, 11 ... Library control part, 14 ... Host interface, 15 ... Drive interface, 17 ... Optical disk monitoring database, 18 ... Optical drive monitoring database, 32 ... Optical pickup, 33 ... drive memory, 34 ... controller interface, 40 ... optical disc, 50 ... disc rotating mechanism, 51 ... slider mechanism

Claims (7)

A plurality of optical drives capable of recording / reproducing on an optical disc, a control unit for controlling the plurality of optical drives, and a monitoring unit for monitoring a deterioration state of the plurality of optical drives,
The controller is
A first optical drive reproduces data in a predetermined area of the first optical disc to measure a first reproduction evaluation index, and the monitoring unit compares with a predetermined threshold;
When the first reproduction evaluation index is bad with respect to the threshold value,
The first optical drive reproduces the data in the predetermined area of the second optical disc for which the predetermined reproduction quality is confirmed, measures a second reproduction evaluation index, and the monitoring unit compares it with the threshold value. Determining that the first optical drive is in a deteriorated state when the second reproduction evaluation index is bad with respect to the threshold;
A second optical drive whose predetermined reproduction performance has been confirmed reproduces data in the predetermined area of the first optical disc to measure a third reproduction evaluation index, and the monitoring unit compares it with a predetermined threshold value. And an optical disc library apparatus that controls to determine that the first optical disc is in a deteriorated state when the third reproduction evaluation index is worse than the threshold. The first optical drive reproduces data in a predetermined area of the first optical disc, measures the first reproduction evaluation index, compares it with a predetermined threshold,
When the first reproduction evaluation index is bad with respect to the threshold value,
Based on the result of reproducing the data in the predetermined area of the second optical disk whose predetermined reproduction quality is confirmed by the first optical drive, measuring the second reproduction evaluation index, and comparing it with the threshold value, When the reproduction evaluation index of 2 is bad with respect to the threshold, it is determined that the first optical drive is in a deteriorated state,
Based on the result of reproducing the data in the predetermined area of the first optical disc with the second optical drive whose predetermined reproduction performance has been confirmed, measuring the third reproduction evaluation index, and comparing it with the predetermined threshold value, An optical disc reproducing method comprising: evaluating a deterioration of an optical drive by determining that the first optical disc is in a deteriorated state when a third reproduction evaluation index is poor with respect to the threshold value. A plurality of optical drives capable of recording / reproducing on an optical disc, a control unit for controlling the plurality of optical drives, and a monitoring unit for monitoring a deterioration state of the plurality of optical drives,
The plurality of optical drives are:
A self-monitoring information recording unit capable of measuring a reproduction evaluation index by reproducing data in a predetermined area of the optical disc;
The controller is
A predetermined optical drive measures the reproduction evaluation index of a predetermined optical disc for which a predetermined reproduction quality is confirmed, and the monitoring unit compares the predetermined evaluation value with a predetermined threshold value when the reproduction evaluation index is worse than the threshold value. An optical disc library apparatus, wherein the optical drive is controlled to determine that the optical drive is in a deteriorated state.   4. The optical disk library apparatus according to claim 3, wherein the predetermined optical disk whose reproduction quality is confirmed is a reproduction-only optical disk.   A reproduction evaluation index of a predetermined optical disk for which a predetermined reproduction quality is confirmed by a predetermined optical drive is measured, and the monitoring unit compares with the predetermined threshold value when the reproduction evaluation index is worse than the threshold value. A method of reproducing an optical disk, comprising: a process of evaluating deterioration of an optical drive by determining that the drive is in a deteriorated state.   6. The optical disk reproducing method according to claim 5, wherein the predetermined optical disk whose reproduction quality is confirmed is a reproduction-only optical disk. A recording / reproducing unit that performs recording / reproducing on an optical disc, a control unit that controls the recording / reproducing unit, a self-monitoring information recording unit that records self-monitoring information, a memory, and an interface that transmits / receives information to / from a host device; With
The controller is
When the optical disc is mounted, the recording / reproducing unit reproduces data in a predetermined area of the optical disc,
Measure the regeneration evaluation index,
An optical disc apparatus, wherein the reproduction evaluation index is recorded in the memory by the self-monitoring information recording unit, and the reproduction evaluation index is controlled to be output according to a command from a host.

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