JP2012027994A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording/reproducing device with reduced components and high reliability.SOLUTION: A recording/reproducing device includes a first recording device that performs recording to or reproduction from a removable recording medium, a housing unit that houses a plurality of removable recording media, transportation means that transports the removable recording medium between the first recording device and the housing unit, and a second recording device that performs recording to or reproduction from a non-removable recording medium. To record data, the data is once recorded in the second recording device, and the data from the second recording device is then given data redundancy and is distributed and sequentially recorded in the removable recording media by the first recording device. In addition, to reproduce data, the data is sequentially reproduced from the removable recording media by the first recording device, and the data reproduced by the first recording device is once recorded in the second recording device and is output from the recording/reproducing device after synthesizing the distributed data by the second recording device.

Description

  The present invention relates to a control method for a recording / reproducing apparatus, and relates to a technique for improving the reliability of a replaceable recording medium.

  Optical discs typified by DVD (Digital Versatile Disc) and BD (Blu-Ray Disc) are interchangeable recording media and can increase the recording capacity of a PC (Personal Computer) at low cost. Therefore, it is useful as a data storage destination or backup of an HDD (Hard Disc Drive) mounted on the PC.

  Incidentally, in recent years, the amount of data to be recorded has increased remarkably due to the handling of video data. In order to cope with this, the storage capacity of the HDD has reached the terabyte level, while the optical disk has a storage capacity of several tens of gigabytes per disk. On the other hand, development aimed at increasing the capacity of an optical disc is also underway, and one means is disclosed in Patent Document 1. In Patent Document 1, a large capacity is achieved by an autochanger system in which a plurality of optical discs are stored and then controlled and recorded / reproduced.

  Further, the optical disc is required to have reliability for recorded data. Even if there is an error in the read data due to scratches, dirt, etc., the optical disk can be error-corrected up to a certain level by error correction processing. However, when an error exceeding the error correction capability occurs, or when the recording medium becomes unreadable due to deterioration of mechanical characteristics such as warping or deformation of the optical disk, the recorded data cannot be read. On the other hand, Patent Document 1 discloses a method of improving reliability using a RAID (Redundant Array of Inexpensive Disks) method.

  Japanese Patent Laid-Open No. 2004-260688 has an object of “providing an archive device that can quickly read and transfer a data file in which a read request has occurred from a removable recording medium”. A plurality of optical discs 1 in which data obtained by dividing a plurality of data files into a plurality of pieces are mixed, a disc storage shelf 2 storing these optical discs 1, and a plurality of optical discs for reading data recorded on the optical disc 1 It has a drive device 4, a robot 3 for attaching / detaching an optical disk to / from the optical disk drive device 4, and a control computer 5 for controlling the robot 3 and the optical disk drive device 4 in accordance with a read request for an arbitrary data file. There is a description (summary etc.).

JP 2000-163224 A JP-A-9-128163

  When the RAID method is used for an optical disk, a plurality of optical disk drives are required because it is necessary to perform recording or reproduction on a plurality of optical disks in parallel, and the scale of the recording / reproducing apparatus increases. In Patent Document 1, an optical disk drive is mounted in module box units, and a plurality of them are prepared for parallelization. Also in Patent Document 2, parallel reading is performed using a plurality of optical disk drive devices.

  When data is distributed and parallel recording / reading is performed on a plurality of recording media, at least the number of the optical disk drives corresponding to the number of distributions is required. This increases the size of the recording / reproducing apparatus and causes an increase in cost.

  An object of the present invention is to provide a recording / reproducing apparatus having a large capacity and high reliability.

  The above-described object is achieved by, for example, the configuration described in the claims. For example, the recording / reproducing apparatus of the present invention includes a first recording device that records or reproduces data on a replaceable recording medium, a storage unit that stores a plurality of replaceable recording media, and a first recording device and a storage unit. It is assumed that a transport unit for transporting the exchangeable recording medium and a second recording device for recording or reproducing on the non-exchangeable recording medium are provided. When recording data, first record the data on the second recording device, then use the first recording device from the second recording device to add data redundancy to a plurality of interchangeable recording media and then distribute the data. Then, recording is performed sequentially. When reproducing data, the first recording device sequentially reproduces data from a plurality of replaceable recording media, and the data reproduced by the first recording device is temporarily recorded on the second recording device, Next, the data distributed by the second recording device is combined and output from the recording / reproducing apparatus.

  According to the present invention, it is possible to provide a recording / reproducing apparatus with high capacity and high reliability.

FIG. 2 is a diagram showing a configuration of a recording / reproducing apparatus according to an embodiment of the present invention. FIG. 2 is a diagram showing an embodiment of the present invention, and is a diagram showing an arrangement of main components of the recording / reproducing apparatus. 1 is a diagram showing an embodiment of the present invention, and is a diagram showing an overview of a magazine for storing optical discs. It is a figure which shows one Example of this invention, and is a figure explaining the process at the time of performing a recording process with respect to a some optical disk. It is a figure which shows one Example of this invention, and is a figure explaining the process at the time of performing reproduction | regeneration processing from a some optical disk, and outputting data to host PC. It is a figure which shows one Example of this invention, and is a figure explaining the process which adds the redundancy with respect to the data from host PC, and produces | generates the data recorded for every some optical disk. FIG. 1 is a diagram illustrating an embodiment of the present invention, and is a diagram illustrating a configuration of a recording / reproducing apparatus that performs recording / reproducing processing on an HDD using encryption / decryption means. It is a figure which shows one Example of this invention, and is a figure explaining the process at the time of performing the recording / reproducing process to HDD using an encryption / decryption means. 1 is a diagram showing an embodiment of the present invention, and is a diagram showing a configuration of a recording / reproducing apparatus in which a nonvolatile memory is mounted in a magazine and data indicating the recording contents of an optical disk in the magazine is acquired from the nonvolatile memory.

  An embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a diagram showing the configuration of a recording / reproducing apparatus according to an embodiment of the present invention. The recording / reproducing apparatus 1 performs processing of recording data transferred from the host PC 7 and transferring the reproduced data to the host PC 7. The recording / reproducing apparatus 1 includes a system controller 2, a magazine 3, an optical disc drive 4, an HDD 5, and an optical disc transport device 6. The system controller 2 performs transmission / reception of data of the host PC 7, recording / reproduction to / from the optical disc drive 4 and HDD 5, and control of the optical disc transport machine. The magazine 3 is a storage unit that stores a plurality of optical disks. The optical disk transport device 6 is a mechanism for transporting the optical disk stored in the magazine 3 to the optical disk drive 4 or transporting the optical disk in the optical disk drive 4 to the magazine 3. The optical disk drive 4 performs a recording / reproducing operation on the optical disk, and the HDD 5 has a function of performing a recording / reproducing operation on a non-commutative magnetic disk. Here, the recording capacity of the HDD 5 is set to be equal to or larger than the recording capacity of a plurality of optical disks to be mounted. For example, when five optical disks having a recording capacity of 50 GB are mounted, the HDD has a recording capacity of 250 GB or more.

  In this embodiment, the HDD will be described as described above, but the present invention is not limited to this. For example, a large-capacity semiconductor memory or the like may be used. Also, as will be described later, the recording medium has a capacity equivalent to the number of optical discs to which data is distributed depending on the number of distributed data recording / reproducing operations. That's fine.

  In this embodiment, the recording / reproducing apparatus 1 is directly connected to the host PC 7. However, the present invention is not limited to this, and recording / reproducing may be performed via a network.

  FIG. 2 is a diagram showing the arrangement of the main components of the recording / reproducing apparatus according to one embodiment of the present invention. The magazine 3, the optical disc drive 4, and the HDD 5 are arranged in the vertical direction, and the optical disc transport mechanism 6 is arranged next to the magazine 3 and the optical disc drive 4. The optical disk transport mechanism 6 is a mechanism for moving the optical disk laterally between the magazine 3, the optical disk drive 4, and the transport base 15 when the transport base 15 moves up and down. For example, when the optical disk is transported from the magazine 3 to the optical disk drive 4, the transport table 15 is moved vertically to an arbitrary optical disk position in the magazine 3. Next, the optical disk in the magazine 3 is moved laterally to the transport table 15 and taken in. Then, the transport table 15 is moved vertically to the position of the disk insertion / removal port 14 of the optical disk drive 4, and the optical disk on the transport table 15 is moved laterally to the optical disk drive 4 to complete the transport. When the optical disk is transported from the optical disk drive 4 to the magazine 3, the reverse is performed. Here, in addition to the function of the transport table 15 described above, a function of transporting a plurality of optical disks simultaneously may be provided. That is, a plurality of optical disks can be transported simultaneously by adding a function of taking a plurality of optical disks or by providing a plurality of transport bases 15. As a result, the time for replacing the optical disk at the position of the disk insertion / removal port 14 of the optical disk drive 4 can be shortened, and the recording / reproduction processing time of this embodiment can be shortened. By the way, the magazine 3 is inserted / removed from the magazine insertion / removal port 8 in a state where the optical disks 7a, 7b, 7c, 7d, 7e are stored. By inserting / removing in units of three magazines, handling of a plurality of optical disks is improved. In this recording / reproducing apparatus, in order to distribute and record data on a plurality of optical disks, it is necessary to group and handle a plurality of optical disks. For this reason, the data distribution unit is set to the number of optical disks in the magazine, and management of optical disks is facilitated by performing insertion / removal in units of magazines.

  FIG. 3 is a view showing the appearance of the magazine 3. FIG. 3A shows a state where the recording / reproducing apparatus is taken out, and FIG. 3B shows a state where the magazine 3 is mounted in the recording / reproducing apparatus. When the magazine 3 has a disk cover 9 and the magazine 3 is outside the recording / reproducing apparatus, the magazine 3 is positioned so as to block the disk insertion / removal port 14 of the magazine 3 and prevents dust and dust from entering the inside. ing. Further, the magazine 3 has a label area 10, and the user can easily determine the magazine by attaching a label thereto. When the magazine 3 is mounted on the recording / reproducing apparatus, the disk cover 9 is rotated to expose the disk insertion / removal port 14 and access to the optical disks 7a, 7b, 7c, 7d, 7e becomes possible. The optical disk unloading mechanism takes out and stores the optical disks 7a, 7b, 7c, 7d, and 7e from the disk insertion / removal port 14.

  Next, recording and reproduction processing by the recording / reproducing apparatus will be described. FIG. 4 is a diagram for explaining the recording process on the optical disc by the recording / reproducing apparatus of the present embodiment. When the recording / reproducing apparatus receives data from the host PC (101), the data is first recorded in the HDD (102). Next, parity is added to the data in the HDD to create distributed data in which the data and parity are distributed in the same number as the number of optical disks (103). Next, the optical disk 1 is transported to the optical disk drive using an optical disk transporter (104), and one of the distributed data is recorded on the optical disk 1 (105). When recording on the optical disk 1 is completed, the optical disk 1 is transported to a magazine using an optical disk transporter (106). This recording process on the optical disk is performed for the number of disks, and the recording is completed (107).

  In the conventional RAID method, reliability can be improved and recording time can be shortened by performing recording on a plurality of disks in parallel. However, in order to perform parallel processing, a plurality of optical disk drives are required, which increases the scale and leads to an increase in cost. In this embodiment, taking advantage of the features of the interchangeable optical disk drive, for example, by performing recording processing sequentially on a plurality of optical disks with one optical disk drive or the like, high reliability can be achieved even with a minimum number of recording means. A recording apparatus can be realized. In this embodiment, one optical disk drive is mounted. However, the present invention is not limited to this, and a plurality of distributed recording processes may be processed in parallel. In that case, the mounting cost can be reduced by making the number of mounted optical disk drives smaller than the number of distributed data recording on the optical disk.

  For example, in the case of a recording / reproducing apparatus equipped with 100 optical disks, a recording time of 100 sheets is required when there is one optical disk drive. However, when two optical disk drives are mounted and processed in parallel, 50 sheets are recorded. Recording time is sufficient. This method is effective because the absolute time of recording time increases as the number of recording sheets increases.

  According to the present embodiment, by using an HDD that temporarily records data, it is possible to perform processing in a distributed manner on an optical disc in series (that is, sequentially). For this reason, the number of optical disk drives to be mounted can be made smaller than the number of distributed optical disk drives.

  FIG. 5 is a diagram for explaining the reproduction processing from the optical disc by the recording / reproducing apparatus of the present embodiment. First, the optical disk 1 is transported to the optical disk drive by the optical disk transport device 6 (111). Next, the data on the optical disk 1 is reproduced by the optical disk drive and recorded on the HDD (112). When the reproduction of the optical disk 1 is completed, the optical disk 1 is transported to a magazine using an optical disk transporter (113). The reproduction process to the optical disk is performed for the number of disks, and the reproduction from the optical disk is completed (114). Next, the data in the HDD is synthesized to generate the original data (115). The data generated by the HDD is reproduced and output to the host PC (116).

  Next, parity addition and data distribution for data recorded in the HDD will be described with reference to FIG. FIG. 6 shows an example in which the number of optical disks is five and the data is distributed to five. It is assumed that the data string recorded from the host PC to the HDD is D1, D2, D3,..., D12,. First, as shown in FIG. 6B, parity is added to the unit of four data strings to generate Parity1-4, Parity5-8, Parity9-12,. Next, as shown in FIG. 6C, distributed data to be recorded for each optical disc is generated. For example, the optical disc 1 is generated as D1, D5, D9,. When the distributed data is generated, even when any one of the optical disks becomes unreadable, the original data is distributed by using the data and parity recorded on the other optical disks. This can be realized by a RAID method, and details are omitted. Then, the dispersed data is recorded on the optical disc 1, the optical disc 2,. On the other hand, in the case of reproduction, data is sequentially reproduced from the optical disc 1, optical disc 2,... Optical disc 5 and synthesized by the HDD to generate D1, D2, D3,. If there is no reading error in the data reproduced from the optical disk, reading of the optical disk 5 is omitted because the data of the optical disk 1, the optical disk 2,..., The data of the optical disk 4 and the data of the optical disk 5 can be restored. May be. In this embodiment, one type of parity is added, but the present invention is not limited to this, and a plurality of types can be added to improve reliability.

  This recording / reproducing apparatus uses the HDD as a primary recording area. The data recorded on the HDD remains in the recording / reproducing apparatus unless it is erased. However, since the user is recording on the optical disk, there is no recognition that data remains in the recording / reproducing apparatus. For this reason, it is necessary to take measures so that data remaining in the recording / reproducing apparatus does not flow outside. As a countermeasure, a method of erasing data in the HDD when the optical disk is taken out can be considered. However, since it takes time to erase all data, it is expected that usability deteriorates. In the present embodiment, as shown in FIG. 7, an encryption / decryption means 11 for performing encryption / decryption when recording / reproduction to / from the HDD is installed. Since the encryption / decryption key is valid only when the optical disk is loaded, it is possible to prevent the leakage of information in the HDD.

  FIG. 8 is a diagram for explaining processing for encrypting / decrypting data to be recorded in the HDD. First, a magazine in which an optical disk is stored is loaded in the recording / reproducing apparatus (121). The system controller generates an encryption / decryption key when the magazine is loaded (122). Data is encrypted / decrypted using the generation key and encryption / decryption means, and then recorded / reproduced on the HDD (123) (124). When recording / reproduction is completed and the magazine is taken out (125), the generated key is discarded (126). Discarding the generated key makes it impossible to decrypt the data that is encrypted and recorded, and no information is leaked.

  Since the recording / reproducing apparatus of the present embodiment records data in a distributed manner on a plurality of optical discs, internal data cannot be acquired unless all the optical discs are read. For this reason, if a wrong magazine is installed, it takes time until the data can be read out, so that it is difficult to notice erroneous installation, which is inconvenient. In this embodiment, in order to improve usability, the nonvolatile memory 12 is attached to the magazine 3 and the nonvolatile memory recording / reproducing means 13 is installed in the recording / reproducing apparatus 1 as shown in FIG. When recording on an optical disk, a part of data to be recorded such as a file name, a creation date, and a recording capacity of the recording data is written in the nonvolatile memory. As a result, when reproducing from the optical disk, first, the nonvolatile memory is read, and the contents of the optical disk in the magazine are confirmed, thereby preventing erroneous mounting of the magazine. The content to be written into the nonvolatile memory may be content that identifies the optical disc, and may be automatically generated from the write data, or may be additionally written by the user.

  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.

DESCRIPTION OF SYMBOLS 1 ... Recording / reproducing apparatus 2 ... System controller 3 ... Magazine 4 ... Optical disk drive 5 ... Hard disk drive 6 ... Optical disk carrier 7a, 7b, 7c, 7d, 7e ... Optical disk 8 ... Magazine insertion port 9 ... Disc cover 10 ... Label area 11 ... HDD data encryption / decryption means 12... Nonvolatile memory 13... Nonvolatile memory recording / reproduction means 14.

Claims (8)

A first recording device that records or reproduces on a replaceable recording medium; a storage that stores a plurality of the replaceable recording media; and the replaceable recording medium between the first recording device and the storage. A recording unit including a conveying unit that conveys, a second recording device that records or reproduces data on a non-exchangeable recording medium, and a system controller that controls data recording or reproduction for the first and second recording devices. A playback device,
The recording capacity of the second recording device is equal to or greater than the total recording capacity of the interchangeable recording medium held by a plurality of the recording devices.
When recording data in the recording / reproducing apparatus, the system controller temporarily records data in the second recording device, and then uses the first recording device from the second recording device to perform a plurality of the recording Record on a removable recording medium,
When the system controller records on the replaceable recording medium, the transporting unit arbitrarily selects the replaceable recording medium and transports it to the first recording device, and converts the data on the second recording device into data. After adding redundancy, the first recording device distributes data to the plurality of interchangeable recording media and sequentially records the data,
When reproducing data from the recording / reproducing apparatus, the system controller temporarily records data reproduced by the first recording device from a plurality of the exchangeable recording media on the second recording device, Data output by playing data from other recording devices,
When the system controller reproduces from the replaceable recording medium, the transport means arbitrarily selects the replaceable recording medium and transports it to the first recording device. Sequentially reproducing data on the interchangeable medium and recording the data on the second recording device;
The system controller synthesizes and outputs distributed data reproduced from the plurality of interchangeable recording media by the second recording device,
The recording / reproducing apparatus according to claim 1, wherein the number of the first recording devices mounted is less than the number of distributed recording of data on the replaceable recording medium. The recording / reproducing apparatus according to claim 1,
The recording / reproducing apparatus, wherein the transport means is capable of transporting a plurality of the replaceable recording media simultaneously. The recording / reproducing apparatus according to claim 1,
The recording / reproducing apparatus, wherein the first recording device is an optical disk drive, the second recording device is a hard disk drive, and the replaceable recording medium is an optical disk. The recording / reproducing apparatus according to claim 1,
The recording / reproducing apparatus, wherein the storage unit is a magazine that stores a plurality of the replaceable recording media, and is attached to and removed from the recording / reproducing apparatus in units of the magazines. The recording / reproducing apparatus according to claim 4.
A recording / reproducing apparatus, wherein data is distributed and recorded in units of a plurality of the replaceable recording media stored in the magazine. The recording / reproducing apparatus according to claim 1,
When reproducing a plurality of the exchangeable recording media with the first recording device, the second recording device synthesizes and outputs the data without reproducing at least one or more of the exchangeable recording media. And a recording / reproducing apparatus. The recording / reproducing apparatus according to claim 1,
Encryption and decryption means for encrypting or decrypting data to be recorded or reproduced on the second recording device, and generating a key when the replaceable recording medium is stored in the recording / reproducing apparatus. , When recording on the second recording device using the key, encryption is performed, when reproducing, decryption is performed, and when the replaceable recording medium is taken out from the recording / reproducing apparatus, A recording / reproducing apparatus for discarding the key. The recording / reproducing apparatus according to claim 4.
A non-volatile memory is mounted on the magazine, and a non-volatile memory recording / reproducing unit is mounted on the recording / reproducing apparatus. When recording on the replaceable recording medium, the non-volatile memory is performed by the non-volatile memory recording / reproducing unit. Record the data indicating the recorded contents in
A recording / reproducing apparatus, wherein when the magazine is attached to a recording / reproducing apparatus, data in the non-volatile memory is read by the non-volatile memory recording / reproducing means.

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