JP2014132508A - Data archive system and data duplication processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the loss of data stored in a recording medium having a short residual life.SOLUTION: A data archive system is equipped with a data library device and a server. The data library device is equipped with one or more recording media; one or more recording media storing portions in which the recording media are stored; one or more record reproducing portions obtaining the reading quality of the recorded data when reproducing; and a library control portion for controlling the record reproducing portion and sending/receiving the data or commands to/from the server. The server is equipped with an overall control portion for controlling the entire system; a life management portion for calculating residual lives of the recording media based on the reading quality obtained by the record reproducing portion and managing those; and a data duplication control portion for selecting a duplication destination recording medium in which the data recorded in the short residual life recording medium are duplicated, and carrying out control to duplicate the data, when the calculated residual life of the recording medium is shorter than a predetermined period. A medium having a longer residual life than the short residual life medium is selected as the duplication destination.

Description

  The present invention relates to a data archive system and a data replication processing method.

  As background art in this technical field, there is JP-A-2002-32271. Patent Document 1 discloses that an information processing apparatus capable of accurately determining the life of a storage medium of a connected external storage device and taking an appropriate response is described as “External storage device via a predetermined interface”. In the information processing apparatus that can be connected, it is determined that the life of the storage medium of the external storage device has expired, and the life of the storage medium of the external storage device is determined to have expired In this case, it is provided with notifying means for notifying that effect ”.

JP 2002-32271 A

  In Patent Document 1, the purpose is to determine and notify that the recording unit has reached the end of its life, and it does not take into account protecting data recorded on a recording medium that has reached the end of its life.

  In order to solve the above problems, for example, the configuration described in the claims is adopted.

  According to the present invention, data recorded on a recording medium is copied to another recording medium before the recording medium has reached the end of its life, so that data loss can be prevented.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a block diagram which shows the structure of a data library apparatus. It is a block diagram which shows the structure of a data recording / reproducing part. It is a flowchart which shows operation | movement of a data recording / reproducing part. It is a block diagram of an optical disk conveyance part. It is an external view of an optical disk conveyance part. It is a flowchart which shows operation | movement of an optical disk conveyance part. It is a block diagram which shows the structure of a data archive system. It is a flowchart which shows the recording / reproducing operation | movement of a data archive system. It is a figure which shows the quality degradation by the aging of an optical disk. It is a flowchart which shows the data replication operation | movement of a data archive system. It is a figure which shows the data amount currently recorded on the optical disk used as a lifetime. It is a figure which shows the state of the disk of an optical disk storage part. It is a figure which shows the data amount required for replication in consideration of the data lifetime. It is a figure which shows the data amount which can be added by exchanging a discard disk. It is a figure which shows the relationship between recording speed and the quality deterioration by the aging of an optical disk. It is a figure which shows changing a recording speed with remaining data lifetime. It is a figure which shows arrangement | positioning of the disk of an optical disk storage part. It is a figure which shows the method of discharging | emitting a waste disk.

  Embodiments will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of the data library apparatus.

  A data library apparatus 101 receives data from the network 104 at the time of recording, accumulates it in the hard disk 105 via the server 103, and records the accumulated data on the optical disk 109. At the time of reproduction, data is reproduced from the hard disk 105 or the optical disk 109 and sent to the network 104 via the server 103. Reference numeral 103 denotes a server that controls the data library device through communication with a CPU (Central Processing Unit) 102 built in the data library device 101, and controls the hard disk 105 to record and reproduce data and transmit / receive data via the network 104. Data management such as.

  A hard disk 105 stores data transmitted from the network 104 under the control of the server 103. In FIG. 1, the hard disk 105 is illustrated outside the server 103, but a configuration included in the server 103 may be used.

  Reference numeral 109 denotes an optical disc, and a plurality of optical discs 109 are stored in the optical disc storage unit 108. Although only one optical disk storage unit 108 is shown in FIG. 1, a plurality of optical disk storage units 108 may be built in. For example, one may be used properly according to the application, such as an unrecorded disk storage unit and the other a recorded disk storage unit. Of course, the inside of the optical disk storage unit 108 may be divided into an unrecorded disk storage area and a recorded disk storage area. By using different areas, it becomes easy to grasp the number of recorded disks or the number of unrecorded disks.

  At the time of data recording, the optical disk 109 is taken out from the optical disk storage section 108 by the optical disk transport section 107 and loaded into one of the data recording / reproducing sections 110, 111, 112, 113. Returned to the optical disk storage unit 108. On the other hand, at the time of data reproduction, the optical disk 109 is taken out from the optical disk storage unit 108 by the optical disk transport unit 107, loaded into any of the data recording / reproduction units 110, 111, 112, and 113, data is reproduced, and data reproduction is completed. The optical disk transport unit 107 returns the optical disk storage unit 108 to the optical disk storage unit 108.

  Reference numerals 110, 111, 112, and 113 denote data recording / reproducing units, which are controlled by the CPU 102 of the data library apparatus to perform data recording on the optical disk 109 or data reproduction from the optical disk 109. Further, at the time of reproduction, the data recording / reproducing units 110, 111, 112, 113 can acquire the read quality when reading the data recorded on the optical disc 109, and can be transmitted to the server 103 via the CPU 102.

  The read quality is information indicating the quality of recorded data, such as how much error correction processing has been performed at the time of reading. The timing for acquiring the read quality may be implemented by an instruction from the CPU 701 of the server 103, or may be implemented periodically by the CPU 102 of the data library apparatus 101. Alternatively, it may be performed at the timing when a data reproduction request is received from the user.

  An optical disk transport unit 107 is controlled by the CPU 102 of the data library apparatus 101 to take out the optical disk 109 from the optical disk storage unit 108, transport it, and load it into the data recording / reproducing units 110, 111, 112, and 113. Alternatively, the optical disk 109 is received from the data recording / reproducing units 110, 111, 112, and 113, transported, and stored in the optical disk storage unit 108. Further, for example, the optical disk may be transported between the data recording / reproducing units from the data recording / reproducing unit 110 to the data recording / reproducing unit 111, or the optical disk 109 may be conveyed within the optical disc storage unit 108. When the data library apparatus 101 includes a plurality of optical disk storage units 108, the optical disk transport unit 107 may transport the optical disk from the built-in optical disk storage unit to another built-in optical disk storage unit.

  Reference numeral 102 denotes a CPU of the data library apparatus 101, which controls the optical disc transport unit 107 in response to a request from the server 103, selects a desired optical disc from among a plurality of optical discs 109 stored in the optical disc storage unit 108, The data is sent to the data recording / reproducing units 110, 111, 112, and 113. Further, the optical disc transport unit 107 is controlled to receive the optical disc 109 from the data recording / reproducing units 110, 111, 112, and 113, and the optical disc is stored at a predetermined position in the optical disc storage unit 108. Reference numeral 106 denotes a memory in which a program for controlling the CPU 102 of the data library apparatus and various setting information are recorded.

  FIG. 2 is a block diagram showing the configuration of the data recording / reproducing unit.

  A data recording / reproducing unit 110 records data input from the CPU 102 of the library apparatus on an optical disk. Further, the data reproduced from the optical disc is output to the CPU 102 of the library apparatus.

  Reference numeral 207 denotes a CPU which controls recording processing and reproducing processing of the data recording / reproducing unit 110. Note that an arbitrary circuit capable of similar control may be used instead of the CPU. Reference numeral 201 denotes a data recording medium, for example, a BD (Blu-ray Disc). The data recording medium is not necessarily limited to an optical disk, and may be a recording medium such as a magneto-optical disk or a hologram. Similar effects can be considered in these recording media.

  An optical pickup 202 reads a signal from the optical disc 201 and sends it to the amplifier circuit 203. Also, the modulation signal sent from the signal processing circuit 204 is recorded on the optical disc 201. An amplification circuit 203 amplifies the reproduction signal read from the optical disc 201 via the optical pickup 202 and sends the amplified signal to the signal processing circuit 204. In addition, a servo signal is generated and sent to the servo circuit 206.

  A signal processing circuit 204 demodulates an input signal and sends data subjected to error correction or the like to the interface circuit 205. Further, an error correction code is added to the data sent from the interface circuit 205, and the data is modulated and sent to the optical pickup 202. Reference numeral 205 denotes an interface circuit that performs data transfer processing conforming to, for example, SATA (Serial Advanced Technology Attachment) or other transfer methods. At the time of data transfer, the data sent from the signal processing circuit 204 is sent to the CPU of the library device that is a host. Further, the data sent from the CPU of the library device as a host is sent to the signal processing circuit 204.

  A memory 208 stores a program for controlling the data recording / reproducing unit, various setting information, medium information acquired from the optical disc, and the like. Although the memory 208 is connected to the CPU 207 in the data recording / reproducing unit, the memory 208 may be connected anywhere inside or outside the data recording / reproducing unit. In addition, as long as information can be held, the memory may not be used, and for example, a hard disk may be used. A servo circuit 206 controls the optical pickup 202 with the servo signal generated by the amplifier circuit 203.

  The data recording / reproducing unit configured as described above can record data on the optical disk in accordance with an instruction from the CPU 102 of the data library apparatus 101, and can reproduce data from the optical disk and pass it to the CPU 102 of the data library apparatus 101. Although the data recording / reproducing unit 110 has been described here, the data recording / reproducing units 111, 112, and 113 have the same configuration.

  FIG. 3 is a flowchart showing the operation of the data recording / reproducing unit.

  When an optical disk is loaded in the data recording / reproducing unit in step S301, a setup process is performed in step S302.

  In step S303, if data reproduction is requested by the CPU of the data library apparatus, data reproduction processing is performed in step S304. Alternatively, if data recording is requested from the CPU of the data library apparatus in step S305, data recording processing is performed in step S306. If the reproduction or recording process has been completed in step S307, the process ends.

  FIG. 4 is a block diagram of the optical disk transport unit, and FIG. 5 is an external view of the optical disk transport unit.

  An optical disk transport unit 107 receives an instruction from the CPU 102 of the data library apparatus 101, takes out the optical disk 109 from the optical disk storage unit 108, and loads it into the data recording / reproducing units 110, 111, 112, and 113. Further, the optical disk is taken out from the data recording / reproducing unit and stored in the optical disk storage unit.

  Reference numeral 401 denotes a CPU which controls the optical disc transport unit. A memory 402 stores a program for controlling the optical disc transport unit, various setting information, and the like. In addition, although the memory 402 showed the example connected with CPU401 within an optical disk conveyance part, it may be connected anywhere inside and outside an optical disk conveyance part. In addition, as long as information can be held, the memory may not be used, and for example, a hard disk may be used.

  Reference numeral 403 denotes a sensor control circuit that controls various sensors based on instructions from the CPU 401. In addition, it receives input signals from various sensors and notifies the CPU 401 of them.

  A motor control circuit 404 drives the robot arm units 405, 406, and 407 based on instructions from the CPU 401. Further, the robot hand unit 408 is driven.

  The robot arm units 405, 406, and 407 adjust the position of the robot hand unit 408 by linear movement such as forward movement and reverse movement and rotational movement.

  The robot hand unit 408 has a shape that can hold the optical disk 109 without damaging it. The robot hand unit 408 moves the optical disk in and out of the optical disk storage unit 108 and the data recording / reproducing units 110, 111, 112, and 113.

  The optical disk transport unit configured as described above can transport the optical disk between the data recording / playback unit and the data recording / playback unit in accordance with an instruction from the CPU 102 of the data library apparatus 101.

  Although an example in which one optical disk transport unit exists in the data library apparatus is shown here, a plurality of optical disk transport units may exist. Further, the shape of the optical disk transporting portion is not limited to the example of FIG. 5. For example, the optical disk may be fixed and transported using the center hole of the optical disk.

  FIG. 6 is a flowchart showing the operation of the optical disk transport unit.

  In step S601, a setup process for starting the operation of the optical disk transport unit is performed.

  Next, if it is specified in step S602 that the optical disc transport source is the data recording / reproducing unit from the host, information indicating which of the data recording / reproducing units 110, 111, 112, and 113 has been designated is acquired in step S603. .

  Next, in step S604, information on which address in the optical disk storage unit is to be transported and stored is acquired, and in step S605, the optical disk is received from the data recording / playback unit that is the designated transport source, and the received optical disk is designated as the transport destination. Is transported to a predetermined address in the optical disk storage unit.

  Alternatively, if it is specified in step S606 that the optical disk transport source is the optical disk storage unit from the host, information on which address the optical disk is transported to and stored in the optical disk storage unit is acquired in step S607.

  Next, in step S608, information on whether the optical disk is transported and delivered to any of the data recording / reproducing units 110, 111, 112, and 113 is acquired, and in step S609, from the predetermined address of the optical disk storage unit that is the designated transport source. An optical disc is acquired, and the acquired optical disc is transported to a data recording / reproducing unit as a designated transport destination and loaded.

  If the transportation process has been completed in step S610, the process ends.

  FIG. 7 is a block diagram showing the configuration of the data archive system.

  The data archive system is configured by connecting one or more data library apparatuses 101, 708, and 709, a hard disk 105, and a network 104 to a server 103. Note that the data library apparatuses 708 and 709 have the same configuration as the data library apparatus 101, and a description thereof will be omitted. In FIG. 7, three data library devices are connected, but the number is not limited to three. In this embodiment, the server 103 describes the operation for the data library apparatus 101, but the same operation is performed for the data library apparatus 708 or the data library apparatus 709.

  A server 103 provides services centered on data recording / reproduction to the data library apparatus 101, performs data recording / reproduction with respect to the hard disk 105, and transmits / receives and manages data via the network 104.

  A CPU 701 of the server 103 records data received from the network 104 via the network control unit 705 to the hard disk 105 via the hard disk I / F unit 704 at the time of data recording. Alternatively, the data library apparatus 101 is controlled via the data library I / F unit 703 and recorded on the optical disk built in the data library apparatus 101.

  At the time of data reproduction, data is read from the hard disk 105 via the hard disk I / F unit 704 and the read data is transmitted to the network 104 via the network control unit 705.

  Alternatively, the data library apparatus 101 is controlled via the data library I / F unit 703, the data is reproduced from the optical disk built in the data library apparatus 101, the reproduced data is received, and the received data is received via the network control unit 705. To the network 104.

  Reference numeral 702 denotes a memory in which a program for controlling the CPU 701 of the server 103 and various information are recorded.

  A data library I / F unit 703 performs control related to data transmission / reception between the data library apparatus 101 and the CPU 701 of the server 103.

  In the figure, a plurality of data library devices are connected to one data library I / F unit. However, for example, a configuration in which a plurality of data library devices are connected via a network may be used.

  A hard disk I / F unit 704 performs data transfer with the hard disk 105 according to a standard such as SATA.

  A network control unit 705 performs control related to data transmission / reception between the network 104 and the CPU 701 of the server 103.

  A life management unit 706 predicts the life of the optical disc 109 based on the read quality acquired from the library apparatus 101. The prediction method will be described later.

  A data replication control unit 707 receives a data replication request from the CPU 701. The data replication control unit 707 selects where the data recorded on the optical disk is replicated and notifies the CPU 701 of the data. Then, a request for a duplication process is issued to the CPU 701. Details of the data replication control unit 707 will be described later.

  FIG. 8 is a flowchart showing the operation of the data archive system.

  When a reproduction request is made to the server 103 via the network 104 in step S801, the CPU 701 of the server 103 checks the storage destination of the data requested for reproduction in step S802. If the requested data is in the hard disk 105, the CPU 701 of the server 103 performs data reproduction processing from the hard disk 105 in step S803. The reproduced data is transmitted from the CPU 701 of the server 103 to the network 104 via the network control unit 705. In step S804, the reproduction process is completed.

  Alternatively, if the requested data is not in the hard disk 105, the CPU 701 of the server 103 identifies the optical disk on which the requested data is recorded in step S805.

  Next, reproduction means determination processing is performed in step S806. The reproduction means determination process is a process for determining which data recording / reproducing unit of which data library apparatus is used for reproducing the optical disc. This determination processing is performed by a program recorded in the memory 702 of the server 103, and determination of which device is used is performed by a determination algorithm also recorded in the memory 702.

  If the data library device to be used for reproduction and the data recording / reproducing unit to be used are determined by the reproducing means determination process, then in step S807, the data recording / reproducing unit to be used is determined for the data library device determined in step S806. Tells the optical disc to be played and requests data playback. The reproduced data is sent from the data library device to the CPU 701 of the server 103 via the data library I / F unit 703 and transmitted to the network 104 via the network control unit 705 as needed.

  Next, when the process is completed in step S808, the process ends.

  In addition, the CPU 701 of the server 103 controls not only the reproduction process but also the recording process. Here, the case where the start trigger of the recording process is determined by the CPU 701 of the server 103 in step S809 will be described in detail.

  In step S809, the CPU 701 of the server 103 checks whether there is data to be recorded on the optical disk among the data recorded on the hard disk 105.

  In other words, the data to be recorded on the optical disk is data that should be moved from the hard disk 105 to the optical disk, or can be moved without any problem.

  The determination of which data should be recorded on the optical disk is performed by a program recorded in the memory 702 of the server 103, and the determination of which data should be recorded on the optical disk is also performed by a determination algorithm recorded in the memory 702. In the determination, for example, a criterion such as data having no reproduction request for a certain period or more may be used.

  If there is data to be recorded, a recording means determination process is performed in step S810. The recording means determination process is a process for determining which data recording / reproducing unit of which data library device and which optical disk to use in order to record data on the optical disk. This determination processing is performed by a program recorded in the memory 702 of the server 103, and determination of which device is used is performed by a determination algorithm also recorded in the memory 702.

  If the data library device to be used for recording, the data recording / reproducing unit to be used, and the optical disk to be used are determined by the recording means determination process, in step S811, the data library device uses the data library device determined in step S810. The recording / reproducing unit and the optical disk to be used are transmitted, the data to be recorded is transferred, and data recording is requested.

  Next, it is determined whether or not processing has been performed in step S812.

  With the above configuration, the data archive system according to the present embodiment can reproduce data from the hard disk in response to a reproduction request from the network.

  Here, a method in which the lifetime management unit 706 predicts the lifetime will be described. For example, in the case of an optical disc, there is SER (Symbol Error Rate) as one of the read quality that can be acquired from the data recording / reproducing units 110, 111, 112, and 113, and generally has characteristics as shown in FIG. The horizontal axis indicates aging, and the vertical axis indicates SER, and the SER value increases with time after data recording (hereinafter, this characteristic curve is referred to as SER curve). When the SER value exceeds a certain value, it can be predicted that the life of the optical disk is near. Therefore, the life management unit 706 maintains the SER aging characteristics, so that the life of the optical disk can be predicted by acquiring the current SER value.

  Of course, the lifetime calculation method described above is merely an example, and the present invention is not limited to the above. The lifetime may be predicted by another read quality information or determination means. For example, it is possible to determine the lifetime by checking the number of error corrections during data reproduction and determining the read quality therefrom. The timing for predicting the lifetime may be periodically performed based on an instruction from the CPU 701 or may be performed at a timing when a new read quality is received. Alternatively, the schedule for predicting the next lifetime may be determined from the lifetime predicted in the past.

  When the life management unit 706 detects an optical disk with a short remaining life, it notifies the CPU 701 of the fact.

  Next, a detailed operation of the data replication control unit 707 for replicating data recorded on an optical disk with a short remaining life (hereinafter referred to as a replication source disk) will be described. The data duplication control unit 707 selects, as a duplication destination optical disc, an optical disc having a longer lifetime than the duplication source optical disc as a data duplication destination. As a result, data recorded on the copy source disk can be stored for a longer period of time. Then, as the selection destination of the replication destination optical disk, for example, another optical disk stored in the same optical disk storage unit as the replication source optical disk may be selected, or if the data library apparatus includes a plurality of optical disk storage units. An optical disk stored in a different optical disk storage unit of the same data library device as the original optical disk may be used. Alternatively, when the server is connected to a plurality of data library devices, an optical disc stored in a data library device different from the copy source optical disc may be used.

  Alternatively, the data replication destination may be a hard disk of a server instead of a recording medium such as an optical disk. Alternatively, another recording medium such as an external hard disk directly connected to the data library apparatus may be used, or a recording medium connected to the data archive system via a network may be used.

  As a method of selecting a duplication destination, for example, a RAID (Redundant Arrays of Inexpensive Disks) configuration, which is a technique in which a plurality of storage media are managed as a single recording medium by collecting data recorded on the duplication source optical disc and another optical disc, is used. In a case where the data is assembled, or when one data is recorded across a plurality of optical disks, the duplication destination optical disk may be selected so that they are stored in the same optical disk storage unit. In this way, the optical disks necessary for reproducing data are collected in the same optical disk storage unit, and the efficiency during reproduction can be improved. Alternatively, the duplication destination optical disk may be selected so that optical disks with short lifetimes are collected in one optical disk storage unit. By doing so, for example, when the optical disk is near the end of its life, the optical disk can be duplicated at once. Alternatively, the copy destination optical disk may be selected based on various conditions such as the same user and an optical disk recorded at the same time. Or if you want to manage multiple optical discs in the same optical disc storage unit, select the duplication destination on the condition that there is enough capacity to duplicate all the optical discs instead of selecting the duplication destination for each optical disc. May be. Alternatively, a data library device that preferentially performs the replication process may be introduced. By introducing a data library device dedicated to duplication processing, this data library device does not receive a request for recording new data, and therefore it is possible to estimate the time required for data duplication processing and the number of optical disks to be used.

  As the duplication processing, the data duplication control unit 707 issues a data duplication request to the CPU 701, and the CPU 701 issues a reproduction request for the duplication source optical disc to the data library device via the data library I / F unit 703, and converts the data into the read data. On the other hand, a request is made to record data on the recording medium of the copy destination. A process of copying data recorded on the optical disc will be described with reference to FIG. When the data replication control unit 707 receives an optical disk replication request in step S1001, first, in step S1002, the data replication control unit 707 selects an optical disk storage unit or a data library device that is a data replication destination. Next, in step S1003, it is confirmed whether or not an empty area for data duplication (for example, an empty disk) exists in the selected data duplication destination. If there is no free space, the CPU 701 notifies the user via the network control unit 705 in step S1010, and the process ends. If there is a free space in step S1003, a recording medium (for example, an optical disk) to which data is copied is selected in step S1004. Next, the data replication control unit 707 issues a replication request to the CPU 701 for the replication source disk and the selected replication destination recording medium. Specifically, in step S1005, the CPU 701 issues a reproduction request for the data on the copy source disk. In step S1006, the CPU 701 determines whether or not reproduction of all data on the copy source disk has been completed. If the reproduction has been completed, a request is made to record the reproduction data on the recording medium selected as the data duplication destination in step S1007. In step S1008, the CPU 701 determines whether all data recording processing has been completed. If the recording has been completed, the disk management information is updated in step S1009. For example, since the data replication source disk has already replicated data to a new disk, it is updated as a discardable disk.

  In this embodiment, the replication process is performed after all the data has been read out. However, the data recording process may be performed at the stage where a part of the data is read out, and the replication process can be completed quickly. it can. If copying to an optical disk in the same data library, the reproduced data may be stored in the data library apparatus without being transferred to the server, and may be controlled to be recorded. In addition, although it has been described that the user is notified in step S1010 when there is no vacancy in the selection destination in step S1003, the process may transition to step S1002 again to select the data replication destination again.

  Further, since the original optical disc is a disc determined by the lifetime management unit 706 that the remaining lifetime of the optical disc is short, it is predicted that the optical disc has started to deteriorate to some extent. Therefore, in step S1005, a reproduction request may be issued so that a deteriorated disk is reproduced in an optimum reproduction mode, which is different from normal reproduction of an optical disk. For example, increasing the laser power at the time of reproduction of the data recording / reproducing units 110, 111, 112, 113, reproducing in a mode with high reading accuracy (for example, low-speed reading), or increasing the upper limit of the number of retries when a reproduction error occurs, Various playback modes are possible. Further, when there is data that cannot be reproduced, only the data that can be reproduced may be copied, and the user may be notified that there is data that could not be reproduced.

  As described above, when the life management unit 706 detects that the life of the optical disk 109 has been shortened, the data replication control unit 707 selects a recording medium to which data recorded on the optical disk whose life has been shortened is to be replicated. Data replication processing is performed using the control method that corresponds to the previous one. Thereby, it is possible to prevent data loss by copying data to another recording medium before the end of the life of the recording medium.

  In addition, user convenience can be improved by selecting a replication destination according to the use case.

  Next, a method for calculating the amount of data necessary for data replication processing and a method for calculating the amount of data that can be added to the optical disk storage unit by determining a disc that can be discarded will be described.

  Since the life management unit 706 can predict the life of each optical disk as described above, for example, as shown in FIG. 11, these pieces of information such as the amount of data necessary for replication processing and the amount of data that can be added are stored. By combining the vertical axis and lifetime (time) as the horizontal axis, it is possible to predict how much data volume replication processing will be required in the future. In FIG. 11, the lifetime of Disc1 is 30 years and the amount of data is 100 GB, the lifetime of Disc2, Disc3, and Disc4 is 50 years, the amount of data is 50 GB, the lifetime of Disc5 is 80 years, and the amount of data is 50 GB. ing. As a result, it is only Disc 1 that the optical disk reaches the end of its life after 30 years, and the total amount of data required for the replication process at that time is 100 GB. Similarly, after 50 years, the discs 2, 3, and 4 will also have a lifetime, and a total capacity of 250 GB is required for the replication process. In this way, it is possible to calculate how much capacity will be required for duplication processing in the future, and to notify the user how much recording media will be required for future duplication processing. it can. In some cases, it is possible to encourage preparation in advance.

  Of course, these may be notified to the user as information, or displayed as a GUI (Graphical User Interface). Further, as shown in FIG. 12, not only the future information but also the current status of each optical disc may be notified to the user as a status list of the optical disc.

  Further, the life management unit 706 may manage a data storage period (hereinafter referred to as data life) set by the user. For example, even if the optical disk has a remaining life of 30 years, if the remaining data life is 10 years, the data archive system may store data for 10 years. In this case, since the data life comes before the life of the optical disc, there is no need to duplicate the data when the optical disc reaches its life. Therefore, the data amount that comes first in the data life may be reduced from the total data amount that will be in the life shown in FIG. 11, and may be shown as in FIG. As a result, the amount of data required for unnecessary duplication processing can be omitted, and the data capacity required for future duplication processing can be indicated.

  Further, in the life management unit 706, data of a replication source optical disk for which data replication processing has been completed, an optical disk that has reached the end of its data life, or an optical disk that cannot be used due to a recording error or the like (hereinafter, these optical disks are referred to as discarded disks). By calculating the amount, it is possible to calculate the total data amount of the discarded disk. As a result, as shown in FIG. 14, the capacity that can be added can be calculated by replacing the discarded disk with a new optical disk. As a result, it becomes possible to indicate the capacity that can be added by ejecting an unnecessary disk to the user.

  Further, by calculating the data capacity required for the duplication processing, the data duplication control unit 707 determines whether there is free capacity for duplication in the selected duplication destination recording medium, and notifies the user. Is possible. Furthermore, it is possible to notify not only the current time but also how much data capacity is required as time passes.

  In this embodiment, the amount necessary for replication and the amount that can be added are represented as the data capacity, but may be represented by the number of optical disks instead of the capacity. Further, the target indicating the quantity may be implemented in units of optical disk storage units or in units of data library devices. Further, it may be performed in units of data archive systems.

  Further, the calculation of the data amount may be performed periodically, or may be updated when the life management unit 706 newly predicts the life of the optical disc. The timing for notifying the user may be the timing when the user requests the information via the network, or the CPU 701 may update the information via the network control unit 705 when the life management unit 706 updates the information. May be notified.

  Next, as a data copy control operation, a description will be given of securing a copy destination recording medium in advance.

  The data duplication control unit 707 may notify the CPU 701 of the fact that the duplication destination of the optical disc has been determined in advance, and may disable the optical disc that is the duplication destination candidate in normal recording processing. Specifically, since the server 103 selects an optical disk to be used in the recording process based on a determination algorithm recorded in the memory 702, an optical disk reserved as a data duplication destination is excluded from selection targets in this determination process. Anyway. Accordingly, it is possible to prevent the duplication destination optical disk from being used in other recording processing, and when performing the duplication processing, it is possible to perform duplication processing on a desired optical disc.

  Next, as an operation of data duplication control, a description will be given of performing duplication processing by changing the recording speed of the data recording / reproducing unit according to the length of data life.

  First, the optical disk drive has a characteristic that a high-quality optical disk can be generally generated by lowering the recording speed. An example is shown in FIG. Reference numeral 1501 denotes an SER curve of an optical disk recorded at a quadruple speed, and the predicted life is 30 years. On the other hand, 1502 shows the SER curve of the optical disk recorded at double speed, and the predicted life is 50 years.

  This will be described with reference to FIG. In FIG. 16, 1601 indicates the SER curve of the disk before duplication, 1602 indicates the SER curve of the disk after duplication, and 1603 indicates the timing at which data duplication processing is performed. As shown in FIG. 16A, when the remaining data life is short at the timing of executing the data duplication processing, the recording speed is increased. By changing the speed, the recording processing time is shortened. Even if the life of the optical disk is short, the requirement can be satisfied sufficiently if the life of the disk is longer than the data life of the data. Conversely, if the remaining data life is long at the timing of performing the data duplication processing as shown in FIG. 16B, the recording speed is lowered. Although it takes a long recording process time, a high-quality disc can be created, and the number of data replication processes in the future can be reduced.

  Therefore, by changing the recording speed according to the data life, it is possible to improve recording performance or reduce duplication processing and reduce waste of the optical disk.

  Of course, as shown in FIG. 16C, even when it is time to replicate data, the replication process is not performed if the data life has already expired. As a result, unnecessary duplication processing can be reduced and waste of the optical disk can be reduced.

  Next, the number of recording media stored in the optical disk storage unit will be described.

  Some recording media, such as a holographic memory, can rapidly degrade the quality of the recording medium if left unused. Therefore, instead of filling the entire area of the optical disk storage unit 108 with the optical disk from the beginning, a part of the area may be set as an empty area and added at a timing when the optical disk is required. For example, when the life management unit 706 detects that the life of a certain optical disk is shortened, the CPU 701 notifies the user via the network control unit 705 to that effect. Or you may display on GUI. When it is detected that the user has completed the addition of a new optical disk to the copy destination optical disk storage unit, the data replication control unit 707 performs a replication process on the added optical disk.

  By doing so, it is possible to prevent the recording medium from aging while remaining unused. Of course, a spare recording medium may be stored in the optical disk storage unit in advance as a countermeasure against sudden deterioration rather than the normal aging deterioration of the recording medium.

  On the contrary, for example, in the case of a recording medium such as BD which is not used and hardly deteriorates, it may be stored in all storage areas of the optical disk storage unit from the beginning. As a result, the work of adding a recording medium later can be reduced.

  Of course, not only in the case of data duplication processing but also in normal recording processing, the user may be notified that a new optical disc is to be added when there are not enough free discs.

  Next, the duplication process in units of optical disk storage units will be described.

  When the life management unit 706 detects that the lifespan of a certain number of or more of the optical disks stored in the optical disk storage unit 108 is shortened, the duplication process may be performed in units of optical disk storage units. For example, an optical disk storage unit on which an unused optical disk is mounted is additionally mounted on a data library apparatus that performs replication processing, and replication processing is performed on the added unused optical disks in order of the optical disks to be replicated.

  As a result, duplication processing is possible without changing the data configuration managed by the optical disk storage unit.

  Next, the place where the discarded disk is stored in the optical disk storage unit will be described.

  As shown in FIG. 17, the server CPU 701 may control the rearrangement of the optical discs so that the discarded discs are collected in a predetermined place in the optical disc storage unit. By disposing the discarded disc at a position far from the recording / reproducing unit, an effective optical disc can be arranged at a position near the recording / reproducing unit, and the transport efficiency of the optical disc is improved. Further, as shown in FIG. 18, by consolidating the discarded discs at a position where the discarded discs are easily ejected, the efficiency when ejecting the discarded discs from the optical disc storing unit 108 is improved.

  Note that an area for storing the discard disk may be secured in the optical disk storage unit in advance, or the optical disk storage unit may be rearranged so that the discard disk is stored in order from a position far from the data recording / reproducing unit. .

  Next, security countermeasures for discarded disks will be described. If the data is encrypted and recorded on the optical disk and the encryption key is managed by the server or each data library device, the encryption key may be completely deleted from the system when the optical disk becomes a discarded disk. . Alternatively, when the optical disk becomes a discarded disk, the data recording / reproducing device 110, 111, 112, or 113 may be used to overwrite the optical disk to make it unreproducible. As a result, when the discarded disk is discarded, it is possible to prevent the data recorded on the discarded disk from being leaked.

  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. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
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. Actually, it may be considered that almost all the components are connected to each other.

DESCRIPTION OF SYMBOLS 101 ... Data library apparatus, 102 ... CPU, 103 ... Server, 104 ... Network, 105 ... Hard disk, 106 ... Memory, 107 ... Optical disk conveyance part, 108 ... Optical disk storage part, 109 ... Optical disk, 110, 111, 112, 113 ... Data recording / playback unit

Claims (14)

In a data archive system comprising one or more data library devices and a server,
The data library device is:
One or more recording media;
One or more recording medium storage units in which the recording medium is stored;
One or more recording / reproducing units having a function of recording or reproducing data on the recording medium and acquiring a read quality of the data recorded on the recording medium at the time of reproduction;
A library control unit for controlling the recording / reproducing unit and transmitting / receiving data or commands to / from the server;
With
The server
An overall control unit for controlling the entire data archive system;
A life management unit that calculates and manages the remaining life of the recording medium based on the read quality acquired by the recording / playback unit;
When the remaining life of the recording medium calculated by the life management unit is shorter than a predetermined period, a copy destination recording medium to which data recorded on the short life recording medium is copied is selected, and the copy destination recording medium is selected. A data duplication control unit for controlling the duplication of data on the short-lived recording medium;
With
The data duplication control unit selects a recording medium having a longer remaining life than the short-life recording medium as the duplication destination recording medium. The data archiving system according to claim 1,
The life management unit manages the amount of data recorded on the recording medium, and when the recording medium has a free capacity necessary for copying the data recorded on the recording medium, the recording medium Is selected as the duplication destination recording medium. The data archive system according to claim 1 or 2,
The data archiving control unit selects a recording medium stored in the same recording medium storage unit as the short-lived recording medium as the duplication destination recording medium. The data archive system according to claim 1 or 2,
When the data library device includes a plurality of recording medium storage units,
The data archive control device, wherein the data duplication control unit selects a recording medium stored in a recording medium storage unit different from the short-lived recording medium as the duplication destination recording medium. The data archive system according to claim 1 or 2,
When the data archive system comprises a plurality of data library devices,
The data archiving apparatus, wherein the data duplication control unit selects a recording medium stored in a recording medium storage unit included in a data library apparatus different from the short-life recording medium as the duplication destination recording medium. The data archive system according to any one of claims 1 to 5,
The lifetime management unit calculates a capacity of data recorded on the recording medium for each calculated lifetime of the recording medium;
A data archiving system characterized by The data archive system according to any one of claims 1 to 6,
The data replication control unit secures a recording medium stored in a recording medium storage unit selected as a replication destination as a data replication destination;
A data archiving system characterized by The data archive system according to any one of claims 1 to 7,
Providing an empty area for storing a new recording medium in the recording medium storage unit;
A data archiving system characterized by The data archive system according to any one of claims 1 to 8,
The overall control unit disposing the recording medium that is no longer needed stored in the recording medium storage unit at a predetermined location in the recording medium storage unit;
A data archiving system characterized by The data archive system according to any one of claims 1 to 9,
The recording / playback unit encrypts and records data on the recording medium,
The overall control unit determines whether the data recorded on the recording medium is necessary;
If the data recorded on the recording medium is unnecessary, deleting the encryption key of the encryption,
A data archiving system characterized by The data archive system according to any one of claims 1 to 10,
The overall control unit determines whether the data recorded on the recording medium is necessary;
If the data recorded on the recording medium is unnecessary, the recording / reproducing unit makes the data recorded on the recording medium unrecoverable,
A data archiving system characterized by In a data archive system equipped with a server and a data library device,
The data library device is:
One or more recording media;
A recording medium storage unit in which one or a plurality of the recording media are stored;
One or a plurality of recording / reproducing units having a function of recording and reproducing data on the recording medium and acquiring a read quality of the data recorded on the recording medium at the time of reproduction;
A recording medium transport unit that transports and delivers the recording medium between the recording medium storage unit and the recording / reproducing unit;
A library control unit for controlling the recording medium transporting unit and the recording / reproducing unit and transmitting / receiving data and / or commands to / from the server;
With
The server
An overall control unit for controlling the entire data archive system;
An information recording medium for recording data;
A data library interface unit for transmitting and receiving data and / or instructions to and from the data library device;
A lifetime management unit for calculating the lifetime of the recording medium from the read quality;
A data replication control unit that selects a destination recording medium to replicate data recorded on the recording medium, and performs control to replicate the data of the recording medium to the recording medium of the replication destination;
With
The data duplication control unit selects a recording medium stored in the same recording medium storage unit as the duplication source recording medium as a data duplication destination,
A data archiving system characterized by In a data archive system comprising one or more data library devices and a server, a data duplication processing method for duplicating data recorded on a recording medium,
Obtaining the read quality of the recording medium;
Calculating a remaining life of the recording medium based on the acquired read quality;
If the calculated remaining life is shorter than a predetermined period, selecting a copy destination recording medium to which data recorded on the short life recording medium is copied;
Recording the data recorded in the short-lived recording medium on the selected replication destination recording medium;
Have
The data duplication processing method, wherein the duplication destination recording medium has a longer remaining life than the short-lived recording medium. The data replication processing method according to claim 13,
Determining the free capacity of the recording medium,
A data duplication process, wherein the recording medium is selected as the duplication destination recording medium when the recording medium has a free space necessary for duplicating the data recorded on the short-lived recording medium Method.

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