JPH10269026A - Library sub system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously receive a mounting request and a read/write request to the plural pieces of logic volumes stored in a multi-volume type magnetic tape cartridge. SOLUTION: To the mounting request from a host device 100 to the logic volume 117, in the case that the other logic volume 117 stored in the multi- volume type magnetic tape cartridge 116 is mounted, a recording /reproducing device 112, on which the multi-volume type magnetic tape cartridge 116 is mounted, and a recording/reproducing controller 107 connected to the recording/ reproducing device 112 specified by the host device 100, are taken into consideration, the multi-volume type magnetic tape cartridge 116 is appropriately moved to the recording/reproducing device 112 and the logic volume 117 is copied to the magnetic tape cartridge 116 for tentatively storing the logic volume 117.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a library subsystem for storing a recording medium and transporting the recording medium to a recording / reproducing apparatus according to a request, and in particular, a library for storing a recording medium divided into one or more recording areas. For subsystems.

[0002]

2. Description of the Related Art Conventionally, magnetic tape cartridges and the like exist as data recording media in information systems. Further, there is a library device which includes a plurality of storage shelves for storing magnetic tape cartridges and automatically mounts / demounts the stored magnetic tape cartridges on a recording / reproducing apparatus.

In Japanese Patent Application Laid-Open No. 5-73221, one magnetic tape cartridge is divided into a plurality of areas, and the divided one area is used for data transfer as if it is equivalent to one magnetic tape cartridge. Means that can perform recording / reproduction, in other words, means that a user can use one magnetic tape cartridge as a plurality of magnetic tape cartridges is shown. (In the following, 1
(A region that can be treated as a magnetic tape cartridge of a volume is referred to as a logical volume.) Also, in Japanese Patent Application Laid-Open No. Hei 6-131233, one library of a magnetic tape cartridge containing a plurality of logical volumes is stored. A recording / reproducing means capable of simultaneously recording / reproducing data on a plurality of logical volumes of a magnetic tape cartridge is shown. FIG.
The recording / reproducing means will be described with reference to FIG. FIG. 2 shows a host device 200 (200a, 200b), a recording / reproduction control device 210 (210a, 210b), and a buffer 220.
(220a to 220f), the recording / reproducing device 230 (23
0a to 230f), a configuration diagram of a system including a library control device 270 and a magnetic tape cartridge 240. However, the library device including a storage shelf for storing the magnetic tape cartridge 240 and an accessor for moving the magnetic tape cartridge 240 between the storage shelf and the recording / reproducing device 230 under the control of the library control device 270 is a recording / reproducing device. Since it is not particularly necessary to describe the means, it is omitted.

The magnetic tape cartridge 240 has a recording medium 250 for recording data therein, and can record a plurality of logical volumes 260 (260a, 260b). Recording / reproducing device 230 (230a to 230)
f) is controlled by the recording / reproducing control device 210 to record data on the recording medium 250 of the magnetic tape cartridge 240 and reproduce data from the recording medium 250. The buffer 220 can temporarily store the logical volume 260. Recording / reproduction control device 21
0 intervenes between the host device 200 and the recording / reproducing device, and controls data transfer.

[0005] The logical volume 260
a, the library control device 2
70 is a recording / reproducing device 230 that is not in use and a buffer 22 that is connected to the recording / reproducing device 230 and is not in use.
Select 0. For example, the recording / reproducing device 230a and the buffer 220a are selected. Then, the magnetic tape cartridge 250 on which the logical volume 260a to be mounted is recorded is moved from the storage shelf to the recording / reproducing device 23.
Move to 0a and mount. Reading / writing from / to the logical volume 260a of the host system 200 is performed by the buffer 220.
a. Thereafter, upon receiving a mount request for the logical volume 260b, the library control device 270
Selects the buffer 220 that is connected to the recording / reproducing device 230a and is not in use. For example, the buffer 220b is selected. Then, the logical volume 26 of the higher-level device 200
The read / write request to 0b is performed via the buffer 220b. The data stored in the buffer 220 at an appropriate timing is transferred to the recording medium 2 of the magnetic tape cartridge 240.
50, and reading data from the recording medium 250 of the magnetic tape cartridge 240 into the buffer 220, data can be simultaneously recorded / recorded on a plurality of logical volumes of one magnetic tape cartridge.
It is possible to perform reproduction.

[0006]

Problems to be Solved by the Invention
In the recording / reproducing means indicated by No. 3, when the following state occurs, the logical volume 260a and the logical volume 26 stored in the same magnetic tape cartridge 240
0b cannot be read / written simultaneously. The situation is as follows: (1) The host device 200a issues a mount request for the logical volume 260a.

(2) The library control device 270 selects the buffer 220a and the recording / reproducing device 230a, and mounts the magnetic tape cartridge 240 on the recording / reproducing device 230a.

(3) The host device 200 a
0a to the logical volume 260a via read /
Write.

(4) The host device 200b issues a mount request for the logical volume 260b.

At this time, the host device 200b is connected only to the recording / reproduction control device 210b,
b, the read / write with the logical volume 260 via the buffer 220e or the buffer 220f, and the recording / reproducing apparatus on which the magnetic tape cartridge 240 storing the logical volume 260b to be mounted is mounted. 230a is the buffer 220
d, the buffer 220e, and the buffer 220f are not connected. Therefore, until the read / write to / from the logical volume 260a performed by the higher-level device 200a ends, the higher-level device 200b
Reading / writing with b cannot be started.

An object of the present invention is to solve the above-mentioned problem and to provide a library subsystem capable of simultaneously reading / writing a plurality of logical volumes stored in the same magnetic tape cartridge.

[0012]

According to the present invention, it is determined whether or not a multi-volume portable recording medium storing a logical volume to be mounted is already mounted on a recording / reproducing apparatus. If not already mounted, the multi-volume portable recording medium is mounted on the designated recording / reproducing apparatus, and the mounting is completed. If it is already mounted, it is checked whether or not the mounted recording / reproducing device and the designated recording / reproducing device are connected to the same recording / reproducing control device. By moving the portable recording medium, the logical volume to be mounted is copied to the temporary evacuation recording medium, and the mounting is completed.

[0013]

Embodiments of the present invention will be described below in detail.

The overall configuration, management information, and the procedure of the mounting process will be described in this order.

First, the overall configuration will be described.

FIG. 1 is a block diagram showing a host device according to an embodiment of the present invention;
FIG. 1 is a configuration diagram of a system including a library control device, a library device, a recording / reproduction control device, a recording / reproduction device, and a magnetic tape cartridge. In FIG. 1, 10
0 is a host device, 101 is a library control device, 115 is a library device, 107 is a recording / playback control device, 112
Denotes a recording / reproducing device, and 116 denotes a magnetic tape cartridge.

The magnetic tape cartridge 118 is provided with an identifier (hereinafter, referred to as a magnetic tape cartridge identifier) for identifying each of them. In addition, a recording medium 118 for recording data therein is provided, and the recording medium 118 has one or more logical volumes 117.
Is recorded. The logical volume 117 is provided with an identifier for identifying each (hereinafter, referred to as a logical volume identifier). Magnetic tape cartridge 1
18 temporarily stores one logical volume 117, and stores a plurality of logical volumes 117.

The library controller 101 includes a control processor 102 for controlling the entire library controller 102,
The control processor 102 comprises a memory 103 for storing information (magnetic tape cartridge management information 104, magnetic tape cartridge management information 105 for temporary evacuation, recording / reproduction control management information 106) necessary for executing processing. The control processor 102 executes a mount process according to a request from the host device 100.

The library device 115 moves the magnetic tape cartridge 116 from the storage shelf 114 to the recording / reproducing device 112 under the control of the library control device 101, or records or records data on the magnetic tape cartridge 116. And / or an accessor 113 having a function of moving the magnetic tape cartridge 116 from the reproducing device 112 to the storage shelf 114. Storage shelf 11
4 is provided with an identifier (hereinafter referred to as a storage shelf identifier) that can identify each of them. The number of the accessors 113 may be one or more.

The recording / reproducing device 112 is controlled by the recording / reproducing control device 107 to record the data received from the recording / reproducing control device 107 on the recording medium 118 of the magnetic tape cartridge 116 or to record the data on the magnetic tape cartridge 1.
It has a function of reading data recorded on 16 recording media 118 and transferring the data to the recording / reproduction control device 107. Further, the recording / reproducing device 112 has an identifier for identifying each.

The recording / reproduction control device 107 includes a control processor 108 for controlling the entire recording / reproduction control device 107,
A memory 1 for storing information (recording / reproducing device management information 110) necessary for the control processor 108 to execute processing.
09, a data buffer 111 for temporarily storing write data received from the host device 100 and data recorded on the recording medium 118 of the magnetic tape cartridge 116. The control processor 107 executes read / write processing according to a request from the host device 100, controls the recording / reproducing device 107, and records data received from the host device 100 on the recording medium 118 of the magnetic tape cartridge 116. For example, the data recorded on the recording medium 118 is transferred to the host device 100.
Also, according to the request of the library control device 101,
By performing positioning processing, the recording / reproducing apparatus 112 is controlled to perform positioning on the specified logical volume 117, or by executing copying processing, the specified logical volume 117 is stored in the recording medium of the first magnetic tape cartridge 116. For example, the data is copied from the storage medium 118 to the recording medium 118 of the second magnetic tape cartridge 116.

Next, the data structure of the management information will be described.

FIG. 3 shows the data structure of the magnetic tape cartridge management information 104. The magnetic tape cartridge management information 104 includes a magnetic tape cartridge identifier 300, a storage shelf identifier 301, a magnetic tape cartridge mount location 302, a logical volume identifier 303, a use status 304, and a logical volume mount location 305. The magnetic tape cartridge identifier 300 is
The identifier attached to each magnetic tape cartridge 116 is shown. The storage shelf identifier 201 indicates an identifier attached to the storage shelf 114 in which the magnetic tape cartridge 116 is stored. The magnetic tape cartridge mounting location 302 indicates a physical identifier attached to the recording / reproducing device 112 on which the magnetic tape cartridge 116 is mounted. However, the magnetic tape cartridge 112
Is in the storage shelf 114 and is not mounted on any of the recording / reproducing devices 112, the result is “none”. The logical volume identifier 303 is the magnetic tape cartridge 1
16 shows the identifier assigned to the logical volume 117 stored in the logical volume 117. The usage status 304 indicates that the logical volume 117 receives a mount request from the higher-level device 100,
Indicates whether it is a read / write target. That is, “in use” indicates that the target is a read / write target, and “unused” indicates that the target is not a read / write target. Logical volume mount location 305
Indicates a logical identifier assigned to the recording / reproducing device 112 that accesses the logical volume 117. However, in the case of the logical volume 117 that is not a read / write target of the higher-level device 100, the logical volume mount location 305 is “none”. Control processor 10
2 examines the magnetic tape cartridge management information 104 and finds out which magnetic tape cartridge 116
14, the magnetic tape cartridge 1
16 is in the storage shelf 114, if it is not in the storage shelf 114, which recording / reproducing device 112 is mounted, which magnetic tape cartridge 116 stores which logical volume 117, It calculates whether the volume 117 is the target of the read / write request of the host device 100 and which recording / reproducing device 112 accesses the logical volume 117. For example, from the information in FIG.
2 calculates the following contents. The magnetic tape cartridge 116 with the magnetic tape cartridge identifier T00000 is stored in the storage shelf 114 with the storage shelf identifier CELL1. However,
At present, it is mounted on the recording / reproducing device 112 to which the recording / reproducing device physical identifier “DECK1” is attached. The magnetic tape cartridge 116 has a logical volume identifier of T00001, T00002, T0000.
., The logical volume 117 of T00001 is stored in the DEC.
By the recording / reproducing device 112 called K1, T0000
The logical volume 117 of No. 3 is read / written by the host device 100 by the recording / reproducing device 112 called DECK2.

FIG. 4 shows a data structure of the temporary save magnetic tape cartridge management information 105. The temporary save magnetic tape cartridge management information 105 is information for managing the magnetic tape cartridge 116 that temporarily stores the logical volume 117. The temporary save magnetic tape cartridge management information 105 includes a magnetic tape cartridge identifier 400, a storage shelf identifier 401, and a state 40.
2, and a mount location 403. The magnetic tape cartridge identifier 400 is an identifier attached to the magnetic tape cartridge 116 for temporarily storing the logical volume 117. The storage shelf identifier 401 is the magnetic tape cartridge 1 for temporary evacuation.
16 is an identifier attached to the storage shelf 114 in which the storage 16 is stored. The state 402 indicates whether the corresponding magnetic tape cartridge 116 for temporary saving is in use. That is, "in use" indicates that the corresponding magnetic tape cartridge 116 for temporary evacuation is in use, and "unused" indicates that the corresponding magnetic tape cartridge 116 for evacuation is not in use. . The mount location 403 is an identifier of the recording / reproducing apparatus 114 on which the corresponding magnetic tape cartridge 116 for temporary saving is mounted. However, the corresponding magnetic tape cartridge 116 for temporary evacuation is used for the recording / reproducing device 114.
If it is not mounted on the server, it will be "None". The control processor 102 checks the magnetic tape cartridge management information 105 for temporary evacuation to determine which magnetic tape cartridge 116 for temporary evacuation is stored in which storage shelf 114, which storage tape 114 is being used, and which recording / reproducing device. 114 can be calculated.

FIG. 5 shows the recording / reproduction control device management information 10
6 shows the data structure of FIG. The recording / reproduction control device management information 106 is information for managing the recording / reproduction control device 107 and the recording / reproduction device 112 connected thereto. The recording / reproduction control device identifier 500, the recording / reproduction device identifier 501, And a state 502. The recording / reproduction control device identifier 500 is an identifier attached to the recording / reproduction control device 107. The recording / reproducing device identifier 501 is an identifier assigned to the recording / reproducing device 112. The state 502 is information indicating whether the corresponding recording / reproducing device 112 is in use. That is, “in use” indicates that the corresponding recording / reproducing device 112 is in use, and “unused” indicates that the corresponding recording / reproducing device 112 is in use.
Indicates that the playback device 112 is not in use. The control processor 102 examines the recording / reproduction control device management information 106 to find out which recording / reproduction control device 107 is connected to which recording / reproduction device 112, and the recording / reproduction device 112 is in use. Information can be calculated. For example, from the information described in FIG. 5, the control processor 102 sets the recording / reproducing control device 107 having the identifier CTL1 to the recording / reproducing device 112 having the identifier DECK1 and the recording / reproducing device 112 having the identifier DECK2. Is connected, DECCK
The recording / reproducing device 112 having the identifier 1 is in use, and the recording / reproducing device 112 having the identifier DECK2 is in use.
Can be calculated as not being used.

FIG. 6 shows the data structure of the recording / reproduction management information 110. The recording / reproducing management information 110 is information for the control processor 108 of the recording / reproducing control device 107 to manage the connected recording / reproducing device 112, and includes a recording / reproducing device identifier 600 and a state 601. . The recording / reproducing device identifier 600 is an identifier of the recording / reproducing device 112 connected to the recording / reproducing control device 107. The state 601 indicates that the corresponding recording / reproducing device 1
12 is information indicating whether the logical volume 117 is used for the copy processing of the logical volume 117. That is, “during copying” indicates that the copying machine is being used for copy processing, and “non-copying” indicates that the copying machine is not being used for copying processing.

Next, the mounting process will be described.

The host device 100 includes a recording / reproducing device 112
And the logical volume 117, and the library device 1
01 is requested to be mounted. Upon receiving this request, the library control device 101 starts the mounting process.
FIG. 7 is a processing flow of the mount processing.

In step 700, the magnetic tape cartridge identifier 3 of the magnetic tape cartridge management information 104
By examining 00 and the logical volume identifier 303, the magnetic tape cartridge 116 storing the logical volume 117 designated by the higher-level device 100 is calculated.

In step 701, the magnetic tape cartridge identifier 3 of the magnetic tape cartridge management information 104
By examining 00 and the magnetic tape cartridge mounting location 302, it is calculated whether the magnetic tape cartridge 116 calculated in step 700 is mounted on the recording / reproducing apparatus 112, that is, whether it is in use. If it is in use, the process proceeds to step 706; otherwise, the process proceeds to step 702.

In step 702, the magnetic tape cartridge identifier 3 of the magnetic tape cartridge management information 104
By examining the storage shelf identifier 301 and the storage shelf identifier 301, the storage shelf 114 storing the magnetic tape cartridge 116 calculated in step 700 is calculated.

In step 703, the library device 11
5 to control the storage shelf 114 calculated in step 702.
From the recording / reproducing apparatus 11 designated by the host apparatus 100 with the magnetic tape cartridge 116 calculated in step 700.
Go to 2 and mount. Also, the status 503 corresponding to the recording / reproducing device 112 specified by the higher-level device 100 in the recording / reproducing control device management information 106 is updated to “in use”. Further, the use status 304 corresponding to the logical volume 117 specified by the higher-level device 100 in the magnetic tape cartridge management information 104 is updated to “in use”, and the logical volume mount location 305 is changed to the recording / reproducing device 112 specified by the higher-level device 100. Update to the identifier.

In step 704, a completion report of the mounting process is sent to the host device 100.

In step 705, the magnetic tape cartridge management information 104 is checked, and the recording / reproducing apparatus 112 on which the magnetic tape cartridge 116 calculated in step 700 is mounted is calculated.

In step 706, the recording / reproduction control device management information 106 is checked, and the recording / reproduction control device 107 connected to the recording / reproduction device 112 calculated in step 705 and the recording / reproduction specified by the higher-level device 100 are determined. Device 11
It is checked whether the recording / reproducing apparatus 107 connected to the second apparatus is the same as the recording / reproducing apparatus 107 connected thereto. If they are the same, proceed to step 707; otherwise, step 7
Proceed to 12.

In step 707, the temporary save magnetic tape cartridge management information 105 is checked, and the temporary save magnetic tape cartridge 116 that is not in use, that is, the magnetic tape cartridge whose corresponding state 402 is "unused", is checked. 116 is calculated. Further, the state 402 corresponding to the calculated magnetic tape cartridge 116 is updated from “unused” to “in use”.

In step 708, the temporary save magnetic tape cartridge management information 105 is checked.
The storage shelf 114 in which the magnetic tape cartridge 116 calculated in step 7 is stored is calculated.

In step 709, the library device 11
5 and the storage shelf 114 calculated in step 708.
From the recording / reproducing apparatus 11 designated by the host apparatus 100 with the magnetic tape cartridge 116 calculated in step 707.
Go to 2 and mount.

In step 710, a copy process, which will be described later, of the recording / reproducing control device 107 connected to the recording / reproducing device 112 mounted with the magnetic tape cartridge 116 in step 709 is started, and the logical volume designated by the higher-level device 100 is started. 117 is copied from the magnetic tape cartridge 116 calculated in step 700 to the magnetic tape cartridge 116 calculated in step 707.

In step 711, a completion report of the mounting process is sent to the host device 100.

In step 712, the temporary save magnetic tape cartridge management information 105 is checked, and the temporary save magnetic tape cartridge 116 that is not in use, ie,
The magnetic tape cartridge 116 whose corresponding state 402 is “unused” is calculated. Further, the state 402 corresponding to the calculated magnetic tape cartridge 116 is updated from “unused” to “in use”.

In step 713, the temporary save magnetic tape cartridge management information 105 is checked, and
The storage shelf 114 in which the magnetic tape cartridge 116 calculated in 2 is stored is calculated.

In step 714, the library device 11
5 to control the storage shelf 114 calculated in step 713.
The recording / reproducing apparatus 11 designated by the host apparatus 100 with the magnetic tape cartridge 116 calculated in step 712 from
Go to 2 and mount.

In step 715, the magnetic tape cartridge management information 104 is checked to calculate the recording / reproducing device 112 on which the magnetic tape cartridge 116 calculated in step 700 is mounted. And the calculated recording / reproducing device 1
The recording / reproduction control device 107 to which the control unit 12 is connected is calculated. Then, the calculated recording / reproduction device 1 of the recording / reproduction device management information 110 of the calculated recording / reproduction control device 107
The status 602 corresponding to No. 12 is updated from “non-copy” to “copying”.

In step 716, the recording / reproducing control device management information 106 is checked, and connected to the same recording / reproducing control device 107 as the recording / reproducing device 112 specified by the higher-level device 100, and is not in use (corresponding state). 503 is "unused"). One recording / reproducing device 112 is selected. Then, the state 5 corresponding to the selected recording / reproducing device 112
03 is updated from “unused” to “in use”.

In step 717, the magnetic tape cartridge management information 104 is checked, and the recording / reproducing device 112 on which the magnetic tape cartridge 116 calculated in step 700 is mounted is calculated.
Recording / reproducing device 11 calculated in step 716 from 12
2, the magnetic tape cartridge 116 calculated in step 700 is moved and mounted.

In step 718, the copy / reproduction control unit 107 connected to the recording / reproducing apparatus 112 mounted with the magnetic tape cartridge 116 in step 717 starts copy processing to be described later, and the logical volume designated by the host apparatus 100 117 is copied from the magnetic tape cartridge 116 calculated in step 700 to the magnetic tape cartridge 116 calculated in step 712.

In step 719, the library device 11
5, the magnetic tape cartridge 116 calculated in step 700 is moved to and mounted on the recording / reproducing apparatus 112 that was mounted when the magnetic tape cartridge 116 was moved in step 717.

In step 720, the recording / reproduction control device management information 106 is checked, and in step 719, the magnetic tape cartridge 116 calculated in step 700 is checked.
The recording / playback device connected to the recording / playback device 112 to which the
The reproduction control device 107 is calculated. Then, the calculated recording / reproduction device management information 110 of the recording / reproduction control device 107 is obtained.
State 602 corresponding to the recording / reproducing device 112 calculated by
Is updated from "copying" to "non-copying".

In step 721, a completion report of the mounting process is sent to the host device 100.

Next, a copy process of the control processor 108 of the recording / reproduction control device 107 will be described.

FIG. 8 is a processing flow of the copy processing.

In step 800, the recording / reproducing device 112 serving as a copy source and the recording / reproducing device 11 serving as a copy destination
In step 2, the status corresponding to the recording / reproducing device 112 in the recording / reproducing device management information 110 is updated from “non-copy” to “during copying”.

At step 801, the recording / reproducing device 11
2 is copied to the designated logical volume 117.

In step 802, the recording / reproducing device 112 serving as a copy source and the recording / reproducing device 11 serving as a copy destination
In step 2, the status of the recording / reproducing device management information 110 corresponding to the recording / reproducing device 112 is updated from "copying" to "non-copying".

Thus, the copy processing is completed.

In this embodiment, the library controller 10
1. Recording / reproduction control device 107, recording / reproduction device 11
2 and a configuration in which one higher-level device 100 is connected to a library subsystem including the library device 115, but of course, a plurality of higher-level devices 100 may be provided. Further, the host device 100 may be connected to all the recording / reproduction control devices 107, or
May be connected to the recording / reproducing control device 107.
That is, the host device 100 and the recording / reproduction control device 107
The connection form with the connection may be any. Further, in this embodiment, the case where the magnetic tape cartridge 116 is used as a recording medium for temporarily storing the logical volume 117 has been described, but a semiconductor that can store a plurality of logical volumes 117 for each recording / reproduction control device 107 is described. A storage medium such as a memory or a magnetic disk may be used as the storage medium for temporarily storing the logical volume 117. Of course, a plurality of recording / reproduction control devices 107 may share a recording medium for temporarily storing the logical volume 117, such as a semiconductor memory or a magnetic disk.

[0058]

According to the present invention, in response to a mount request from a higher-level device to a logical volume stored in a multi-volume magnetic tape cartridge, another logical volume stored in the multi-volume magnetic tape cartridge is received. Is mounted, the recording / reproducing device on which the multi-volume magnetic tape cartridge is mounted and the recording / reproducing control device connected to the recording / reproducing device designated by the higher-level device are taken into consideration. Then, the multi-volume type magnetic tape cartridge is moved, and the logical volume is temporarily copied to the magnetic tape cartridge storing the logical volume. This allows
A library subsystem capable of simultaneously receiving a mount request and a read / write request for a plurality of logical volumes stored in a multi-volume magnetic tape cartridge can be provided.

[Brief description of the drawings]

FIG. 1 shows an overall configuration illustrating the present invention.

FIG. 2 is a configuration diagram illustrating a conventional technique.

FIG. 3 shows a data structure of magnetic tape cartridge management information.

FIG. 4 shows a data structure of magnetic tape cartridge management information for temporary save.

FIG. 5 shows a data structure of recording / reproduction control device management information.

FIG. 6 shows a data structure of recording / reproducing device management information.

FIG. 7 is a processing flow of a mounting process.

FIG. 8 is a processing flow of a copy process.

[Explanation of symbols]

100: Host device 101: Library control device 107: Recording / playback control device 112: Recording / playback device 115: Library device 116:
Magnetic tape cartridge, 117 ... logical volume.

Claims (2)

[Claims] 1. A multi-volume type portable recording medium for storing a plurality of logical volumes, a temporary save portable recording medium for temporarily storing a logical volume, and a plurality of recording / reproducing units for recording / reproducing the logical volume. Recording / reproducing device, a plurality of recording / reproducing control devices for controlling the recording / reproducing device, a plurality of the multi-volume type portable recording media, and a plurality of the temporary save portable recording media. In the library subsystem, which comprises a library device having a function of storing and transporting the multi-volume type portable recording medium and the temporary evacuation portable recording medium, the multi-volume storing the logical volume to be mounted is provided. Means for calculating the type portable recording medium, and the calculated multi-volume type portable recording medium is already recorded / recorded.
Means for calculating whether or not it is mounted on the playback device; and if not mounted, first mounting means for moving and mounting the calculated multi-volume type portable recording medium on the recording / playback device to be mounted. Means for calculating the first recording / reproducing apparatus mounting the multi-volume type portable recording medium when the calculated multi-volume type portable recording medium is already mounted; and Means for determining whether a recording / reproducing device and the second recording / reproducing device to be mounted are connected to the same recording / reproducing control device,
When the first recording / reproducing device and the second recording / reproducing device are connected to the same recording / reproducing control device, the portable recording device for temporary evacuation is stored in the second recording / reproducing device. A second mounting means for mounting a medium and copying the logical volume to be mounted from the multi-volume type portable recording medium to the temporary save portable recording medium; the first recording / reproducing apparatus; If the recording / reproduction device is not connected to the same recording / reproduction control device, the third recording / reproduction control device connected to the second recording / reproduction device is connected to the third recording / reproduction control device. A recording / reproducing apparatus is selected, a portable recording medium for temporary save is mounted on the second recording / reproducing apparatus, and the multi-volume type portable recording medium is transferred from the first recording / reproducing apparatus to the third recording / reproducing apparatus.
To the recording / reproducing apparatus, and mount the logical volume to be mounted from the multi-volume type portable recording medium to the temporary save portable recording medium, and copy the multi-volume type portable recording medium to the Third record /
A library subsystem, comprising: third mounting means for moving from a reproducing device to the first recording / reproducing device and mounting it. 2. A multi-volume portable recording medium for storing a plurality of logical volumes, a plurality of recording / reproducing devices for recording / reproducing the logical volumes, and a buffer for temporarily storing the logical volumes. Having the record /
A plurality of recording / playback control devices for controlling a playback device, and a plurality of the multi-volume type portable recording media stored therein;
Means for calculating the multi-volume portable recording medium storing the logical volume to be mounted, in a library subsystem including a library device having a function of transporting the multi-volume portable recording medium; Means for calculating whether or not the multi-volume portable recording medium has already been mounted on the recording / reproducing apparatus, and if not, the multi-volume type portable recording medium calculated on the recording / reproducing apparatus to be mounted. First mounting means for moving and mounting the portable recording medium, and first mounting the multi-volume portable recording medium when the calculated multi-volume portable recording medium is already mounted.
Means for calculating the recording / reproducing apparatus, and determining whether the first recording / reproducing apparatus and the second recording / reproducing apparatus to be mounted are connected to the same recording / reproducing control apparatus. Means for copying the logical volume to be mounted to the buffer when the first recording / reproducing device and the second recording / reproducing device are connected to the same recording / reproducing control device. 2, when the first recording / reproducing device and the second recording / reproducing device are not connected to the same recording / reproducing control device, the first recording / reproducing device is connected to the first recording / reproducing device. The multi-volume type portable recording medium is moved to a second recording / reproducing device and mounted, the logical volume to be mounted is copied to the buffer, and the first recording / reproducing device is copied from the second recording / reproducing device. / Library subsystem; and a third mounting means for mounting and moving the multi-volume type Nomadic recording medium to the reproducing apparatus.