JP3139744B2 - Library device high-speed access method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed access method for a library device, and more particularly, to a high-speed access method for a library device for executing a medium moving instruction at a high speed.

[0002]

2. Description of the Related Art A conventional high-speed access method for a library device is disclosed in, for example, Japanese Patent Application Laid-Open No. 3-78819 (a method for controlling a cartridge storage position of a library device having an autochanger mechanism). It is used for the purpose of reducing overhead by shortening the time required to move a cartridge type medium in a library apparatus from a shelf to a drive which is a drive unit when accessing.

A conventional technique will be described with reference to the drawings.

FIG. 15 is a configuration diagram showing a storage position control method for a cartridge type medium in a conventional library device.

[0005] A cartridge type medium 604, a drive 601 for transferring data, a shelf 602 for storing the cartridge type medium 604, an autochanger mechanism 603 for moving the cartridge type medium 604 between the drive 601 and the shelf 602, and a cartridge The library device 605 includes a storage device (not shown) for storing information for managing the mold medium 604.

FIG. 16 is a configuration diagram showing a table on a storage device for storing management information of a cartridge type medium of a conventional library apparatus in a storage position control method of the cartridge type medium.

[0007] The flag information 606 corresponding to each shelf 602 has a counter 607 indicating the access frequency of the cartridge type medium 604.

Next, the operation will be described. When there is a request to move the cartridge type medium 604 from the shelf 602 to the drive 601, the counter 607 indicating the access frequency is incremented by one when this operation is completed. After a certain time,
The counter 607 is checked for all the cartridge-type media 604 existing in the library device 605, and when the largest value is not the shelf 602 closest to the drive 601, a message is output to the operator to change the shelf position. If there is a response that prompts whether or not to perform the relocation, it is relocated to the shelf position closest to the drive 601, and the relocation is performed sequentially in descending order of access frequency.

In the above-described conventional technique, an operator's intervention is required, but it can be automatically performed by setting parameters in the system. Alternatively, the rearrangement may be performed at the next startup.

In this manner, the access history of the cartridge type medium 604 within a certain period is obtained, and the shelf position of the cartridge type medium 604 is reconstructed in the descending order of the access frequency.
The overhead is reduced by shortening the time required to move from 2 to the drive 601.

[0011]

The storage position control method of the cartridge type medium of the above-mentioned conventional library apparatus is as follows.
The first problem is that high-speed access to a medium used intensively in a short period of time cannot be performed.

The reason is that, in the conventional technology, it is necessary to count and sum up the frequency of use of the medium in a certain period and rearrange the medium, so that it is not possible to cope with short-term intensive use of the medium. .

A second problem is that when a medium at a position distant from the drive is used in the drive and there is a next medium to be used continuously, it takes time to return the original medium to the shelf. It takes time to move the media to be used to the drive.

The reason is that the prior art does not consider the time required to return a medium located at a position distant from the drive from the drive to the original shelf.

[0015] A third problem is that high-speed access to a medium that is not frequently used cannot be performed.

The reason is that in the related art, a medium that is not frequently used is stored at a position distant from the drive.

A fourth problem is that shelf positions of media having almost the same use frequency may frequently change, and this useless operation may hinder the original medium moving operation. That is.

The reason is that in the prior art, the medium is unconditionally changed to a position closer to the drive in the order of higher use frequency.

A first object of the present invention is to provide a high-speed access method of a library device which can access a medium used intensively in a short period of time at a high speed in the library device.

A second object of the present invention is to provide a high-speed access method for a library apparatus which can access a medium at a position distant from a drive in the library apparatus at a high speed even after the medium is used in the drive. To provide.

A third object of the present invention is to provide a high-speed access method for a library device which can access a medium which is not frequently used in the library device at a high speed.

It is a fourth object of the present invention to provide a high-speed access method for a library device which minimizes useless operations which hinder the original medium movement operation in the library device.

[0023]

According to the present invention, there is provided a high-speed access method for a library apparatus, wherein an application prefetch analysis means for prefetching and analyzing all input applications and extracting a reserved medium to be used, and the application prefetch analysis means. If there is a reserved medium to be used, a medium reservation storage unit for storing information on the reserved medium, a storage storage unit for storing predefined reserved cell information, and the reserved medium is previously moved to a reserved cell near the drive based on the information. The apparatus includes a rearrangement command generation unit and a discharge control unit that changes a storage cell of the medium to a position near the drive when the medium is moved from the drive to the cell.

Further, the status of the library device is constantly monitored, the usage status of the cartridge type medium is stored, and based on the usage status of the cartridge type medium, the daily usage time, the weekly usage time, and the weekly usage time are used. History means for storing, on a monthly basis, on what day of the calendar day or on what day of the working day, the cartridge type medium to be used is moved to a reserve cell near the drive from that information. Is provided.

[Operation] The application prefetch analysis means prefetch analyzes all the input applications and stores the reserved medium to be used, if any, in the medium reservation storage unit, and starts the medium relocation processing.

The history means activates the medium rearrangement processing when the time to prepare the medium to be used is prepared from the information in the used medium storage, the actual working day storage, and the parameter storage as in the application prefetch analysis means.

The storage unit stores reserved cell information defined by an operator in advance for preferentially storing a reserved medium or a medium to be used, storage information of the medium, and the like.

When the medium relocation processing is started, the relocation instruction generating means preferentially moves the reserved medium to the reserved cell based on the information in the storage unit. When a new reserved medium or a medium to be used is being used by the drive, the discharge cell changing process is started.

[0029] When the discharge cell changing process is started, the discharge control means sets the discharge cell of the medium used in the drive to
Change to a position closer to the drive.

[0030]

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

FIG. 1 is a block diagram showing an embodiment of a high-speed access method for a library device according to the present invention. FIG.
FIG. 1 is a configuration diagram showing a high-speed access type library device of the library device of the present invention.

Referring to FIG. 1, the embodiment of the present invention includes a main storage device 101 for generating input / output instructions, a library device 112 as an input / output device, and a central processing unit 111 for controlling the whole. .

As shown in FIG. 2, the library device 112 includes a cell block 202 which is an aggregate of cells 201,
A plurality of cartridge type media 207 stored in the cell block 202, a drive 206 for reading / writing the medium 207, and moving the medium 207 between the cell block 202 and the drive 206 along the X axis 204 and the Y axis 205. It is composed of a robot 203.

The main storage device 101 includes a high-speed access unit 103 for accessing the application 102 and the library device 112 at high speed, a history unit 151,
An input / output control unit 110 controls input / output instructions and exchanges data with the central processing unit 111.

The high-speed access unit 103 pre-analyzes all the input applications 102 and generates a medium use reservation.
04 and a movement command generation means 109 for instructing the input / output control means 110 to move the reserved medium.
And a medium reservation storage unit 108 for storing medium use reservation information.
A storage unit 107 for storing medium storage information of each cell 201;
When the medium 207 is moved to
And a relocation command for the medium 207 based on the state of the storage unit 107 and the command from the application prefetch analysis unit 104 so that the movement time of the medium 207 is shortened. And a rearrangement instruction generating means 106 for generating the instruction.

The history means 151 includes a history writing analysis means 152 for analyzing the usage status of the cartridge type medium in the library apparatus 112 and a history writing analysis means 15.
2, a working medium storage unit 153 for storing the working state of the computer, a working day storage unit 154 for storing the working day of operation of the computer, and a parameter storage unit 15 for specifying the operation of the computer system in detail.
5 is provided.

FIG. 3 is a block diagram showing the addresses of the cell blocks of the library device of the high speed access system of the library device of the present invention.

A to E addresses are given in the vertical direction and 1 to 13 addresses are given in the horizontal direction. The cell address is expressed by a combination of a vertical address and a horizontal address. For example, the expression is cell address A1. FIG. 4 is a configuration diagram showing the contents of the medium reservation storage unit of the high-speed access system of the library device of the present invention.

In the application prefetch analysis means 104, the reserved medium M to be used in each of the applications AP1 to AP4 already existing in the main storage device 101.
1 to M6 can be assigned.

For example, as a result of analyzing application AP1 by application prefetch analysis means 104,
Assuming that reserved media to be used are M1 to M3, FIG.
As shown in the figure, the application AP1 and the reservation medium M1
To M3. The same applies to the other existing applications AP2 to AP4.

FIG. 5 is a block diagram showing the contents of the storage unit of the high-speed access system of the library apparatus according to the present invention.

The contents of the storage unit 107 include a cell type corresponding to each cell address, a cell state, a reservation counter,
It consists of a medium name and a use counter. The cell type is the drive 206 and the drives # 1 to #
2, reserved cells # 1 to # 10 indicating cells for storing reserved media with priority and their priority numbers, and normal cells indicating cells for storing unreserved media and their priority numbers. # 1 to # 53. It is assumed that the priority numbers are set in the order closest to the drive 206. The number of reserved cells can be set arbitrarily.

The state of the cell is “used” when the medium 207 is being used and “empty” when the medium 207 is not used for the drive 206. For the reserved cell and the normal cell, the storage of the medium 207 is performed. If it has not been set, “vacant” is set; if a reserved medium is stored, “reserved”; otherwise, “normal”.

The reservation counter indicates a value obtained by counting how many applications 102 reserve the reservation medium stored in the cell 207.

The scheduled use counter indicates a value obtained by counting how many applications 102 the scheduled medium stored in the cell 207 is scheduled to be used.

The medium name indicates the medium name of the medium 207 stored in the cell 207. For example, FIGS. 4 and 5
In the example shown by, the cell address C7 is reserved cell #
One cell is a cell for storing the medium M1 reserved from three applications AP1 to AP3, and indicates that the medium M1 is currently being used by the drive # 1.

Next, the operation of the embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 6 is a flow chart showing the operation of the application prefetch analysis means of the high-speed access method of the library apparatus of the present invention.

First, it is checked whether or not the application input to the medium reservation storage unit 108 has been completed (step 302). If the application has been terminated, the reservation medium corresponding to the terminated application is deleted from the medium reservation storage unit 108, and the reservation counter in the storage unit 107 corresponding to the deleted reservation medium is decremented by one (step 303). . If there is a cell address for which the reservation counter has become 0, the state of the cell is changed from "reserved" to "normal" (steps 304 and 305).

Next, it is checked whether or not there is an application which has not been analyzed in the main storage device 101. If there is any application, all the steps in the application are analyzed and the drive 2 of the medium 207 is analyzed.
It is checked whether or not there is a move instruction to 06 (step 3
06-308).

If there is a move command, the medium reservation storage unit 108
To the corresponding reservation counter in the storage unit 107 for all the added reservation media.
(Steps 309-310 and 313-31
5).

In this operation, when a new reserved medium is generated, a medium relocation process is performed by the relocation instruction generating means 106 (steps 311 to 312).

The above steps are repeatedly executed.

FIG. 7 is a flowchart showing the operation of the medium relocation processing of the relocation instruction generating means of the high-speed access method of the library apparatus of the present invention.

First, it is checked whether or not the medium newly set as the reserved medium is in use. If the medium is in use, the discharge control means 105 changes the discharge cell (steps 402 to 40).
3).

Next, it is checked whether the medium newly set as the reserved medium is stored in the reserved cell. If the medium is stored in the reserved cell, the state of the cell is changed from "normal" to "reserved" and the reserved state is changed. Set the counter to 1 (step 404)
405).

Next, when the medium newly set as the reserved medium is not stored in the reserved cell, it is checked whether or not the reserved cell has "free" (step 406).

If the reserved cell has "vacant", the medium newly set as the reserved medium is moved to the "vacant" reserved cell, the state of the cell is set to "reserved", and the reservation counter is set to 1 (step 411). . If there is no “empty” in the reserved cell, it is checked whether there is a “normal” cell in the reserved cell (step 407). If there is a “normal” cell in the reserved cell, a reserved cell rearrangement process (step 409, details will be described later) is performed to secure an “empty” cell in the reserved cell, and the medium that has newly become a reserved medium is replaced by an “empty” medium. The reserved cell is moved to the "reserved cell", the state of the cell is set to "reserved", and the reservation counter is set to 1 (step 411). If there is no “normal” cell in the reserved cell, it is not “reserved”, and it is checked whether a normal cell with a higher priority is “empty” from a cell whose use counter is not “0”. The medium that has become the medium is moved to the "empty" normal cell, the cell state is set to "reserved", and the reservation counter is set to 1 (steps 408 and 412).

If a normal cell having a higher priority that is not “reserved” is not “empty”, the normal cell relocation processing (step 4)
10, the details of which will be described later), make the source cell “empty”, move the medium that has newly become the reserved medium to the “empty” normal cell, change the state of the cell to “reserved”, and set the reservation counter. It is set to 1 (step 412).

FIG. 8 is a flowchart showing the operation of the discharge cell changing process of the discharge control means of the high-speed access system of the library apparatus according to the present invention.

This process is a process of changing the discharge cell for the medium used by the drive 206 before the application is analyzed by the application prefetch analysis means 104 and the processing of the reserved medium is performed.

First, the drive 2 that is newly set as a reserved medium
In step 06, it is checked whether the cell from which the medium being used is discharged is a reserved cell. If the reserved cell is used, the reserved cell is set to "reserved" and the reservation counter is set to 1 (steps 502 to 5).
03). If the cell is not a reserved cell, it is checked whether there is an “empty” cell in the reserved cell. The state is changed from “normal” to “empty”, the state of the “empty” reserved cell as a new discharge destination is changed from “empty” to “reserved”, and the reservation counter is set to 1
To change the discharge cell (step 50).
4 and 507-508). If there is no “empty” cell, it is checked whether or not there is a medium in the reserved cell that is not in the “reserved” state. If there is a medium that is not in the “reserved” state, the reserved cell is rearranged (step 506, details will be described later).
Is performed, the state of the original discharge destination cell of the medium used by the drive 206 that has become the newly reserved medium is changed from “normal” to “empty”, and the “empty” reserved cell as the new discharge destination is changed. Is changed from "empty" to "reserved" and the reservation counter is set to 1 to change the discharge cells (steps 505 to 508).

If there is no medium that is not in the reserved state, normal cell rearrangement processing (step 510, details will be described later) is performed to prepare a “vacant” cell as a new discharge destination, and the drive that has newly become the reserved medium At 206, the state of the original discharge destination cell of the medium being used is changed from "normal" to "empty", and the state of the normal cell having a new priority of "empty" and high in priority is changed from "empty" to "empty". The discharge cell is changed by changing to "reservation" and setting the reservation counter to 1 (step 509).
To 512).

If the normal cell with a higher priority that is not in the reserved state is “empty”, the drive 2 that has newly become the reserved medium
At 06, the state of the original discharge destination cell of the medium being used is changed from "normal" to "empty", and the state of the normal cell having a new priority of "empty" and having a higher priority is changed from "empty" to "empty". The discharge cell is changed by changing to "reservation" and setting the reservation counter to 1 (steps 509 to 512).

FIG. 9 is a flowchart showing a high-speed access type reserved cell relocation process of the library apparatus according to the present invention (step 409).
5 is a flowchart showing the operation of FIG.

It is checked whether or not there is a "normal" cell in the reserved cell whose use counter is 0 (step 70).
2) If any, the cartridge medium of the higher priority cell is moved to the "empty" normal cell, the state of the higher priority cell at the transfer source is changed to "empty", and the process ends (step 703). .

If there is no “normal” cell in the reserved cell and the cell whose use schedule counter is 0, it is determined whether or not there is a cell whose use schedule counter is other than 0 and the cell whose use time has passed, by the history means 151. (Step 7
04). If there is a cell whose scheduled use time has passed (step 705), the scheduled use counter is returned to 0 (step 706), and then the above-mentioned step 703 is executed.

If there is no cell whose use time has passed, the medium of the “normal” cell having the highest priority among the normal cells is moved to the “free” normal cell, and the state of the source cell is changed to “vacant”. "To end the process.

FIG. 10 is a flowchart showing the operation of the normal cell relocation processing (step 410) of the high-speed access method of the library apparatus of the present invention.

It is inquired to the history means 151 whether there is a cell having a high priority and a cell whose use schedule counter is other than 0, and a cell whose use schedule time has passed (step 80).
2). If there is a cell whose scheduled use time has passed (step 803), the scheduled use counter is returned to "0" (step 804), and the cartridge medium of the cell whose scheduled use counter is returned to "0" is replaced with the cell state. The cell is moved to an "empty" normal cell, the state of the source cell is changed to "empty", and the process is terminated (step 805).

If there is no cell whose scheduled use time has passed, the cartridge medium of the cell having the highest priority and the cell state of “normal” and the scheduled use counter of “0” is replaced with the normal cell in the “empty” state. And the state of the source cell is set to “empty”, and the process is terminated.

FIG. 14 is a block diagram showing the contents stored in the used medium storage unit of the high-speed access method of the library apparatus according to the present invention.

A "cartridge type medium name" field for storing the name of the medium used in the past and a "calendar day" for the month in which the medium name stored in the "cartridge type medium name" field is used are stored. Use the "day of the week" column to store the day of the week on which the media name stored in the "calendar date" column, the media name stored in the "cartridge type media name" column, and the media name stored in the "cartridge type media name" column are used. The “working” column stores the actual working day in the month, and the “time” column stores the time when the medium name stored in the “cartridge type medium name” column is used.

FIG. 11 is a flowchart showing the operation of the library apparatus of the present invention for taking the use history of the cartridge medium of the high-speed access method.

This is because the history means 151 is the library device 1
12 is a flowchart of a procedure for storing the usage history of the cartridge medium used in the storage unit 12;
Causes the medium name of the cartridge medium scheduled to be used by the application prefetch analysis unit 104 to be stored in the “cartridge type medium name” column of the used medium storage unit 153 (step 852).

The history write analysis means 152 is provided by the application prefetch analysis means 104 to the medium storage unit 153.
The information on the number of calendar days in the month in which the cartridge medium was used, based on the system date of the computer system, is additionally stored in the “calendar date” column of the used medium storage unit 153 in the medium name sent to (Step 853).

Next, the history writing analysis means 152 additionally stores information on the day of the week when the cartridge medium was used in the “day of the week” column of the used medium storage unit 153 based on the system date of the computer system ( Step 8
54).

Next, the history writing analysis means 152
Working day storage unit 1 that stores the system date of the computer system and the working information of the computer system
From 54, the day when the cartridge medium was used corresponds to the actual working day in the month in which the computer system is operated, and is additionally stored in the “working” column of the used medium storage unit 153 (step 855). ).

Finally, the history writing analysis means 152 additionally stores the time when the cartridge medium has been used in the “time” column of the used medium storage unit 153 based on the system time of the computer system (step 85).
6).

According to the above procedure, the history writing analysis means 152
Causes the usage medium storage unit 153 to store the history of use of the cartridge medium.

FIG. 12 is a flowchart showing the operation of selecting a medium to be used from the use history of the high-speed access method of the library apparatus of the present invention.

This is a flowchart for explaining the procedure in which the history means 151 intends to use the cartridge medium. The history write analysis means 152 reads the contents of the used medium storage unit 153 at the stage when the computer system starts operating (step S1). 902). Next, the history writing analysis unit 15
2 reads the contents of the actual work day storage unit (step 90)
3).

At the end of the preparation stage, the history write analysis means 152 reads the contents of the parameter storage 155 (step 904). At this stage, the preparation for using the cartridge medium is completed.

According to the parameter of the cycle for confirming the medium to be used in the parameter storage unit 155 (step 905),
The actual writing analysis unit 152 includes a used medium storage unit 153.
Then, based on the contents of the actual working day storage unit 154 and the parameter storage unit 155, it is confirmed whether or not the cartridge medium 604 to be used exists (step 906).

FIG. 13 is a flowchart showing the operation of selecting a medium to be used from the use history, following FIG. 12 of the high-speed access method of the library apparatus of the present invention.

Continuing from FIG. 12, if there is a cartridge medium 604 to be used in step 906, it is checked whether or not there is an "empty" cell in the reserved cell (step 908). If there is a cell in the “empty” state, the cartridge type medium to be used is moved to the cell in the “empty” state, the state of the cell is set to “normal”, and the planned use counter is set to “1”. And terminates (step 911).

If there is no cell in the “empty” state in the reserved cell in the step 908, it is confirmed whether or not a cell in the “normal” state exists in the reserved cell (step 909). When a cell in the “normal” state exists in the reserved cell, the reserved cell relocation processing described in step 506 of FIG. 8 is performed (step 910). After that, the above-described step 911 is executed and the processing ends.

At step 909, if there is no "normal" cell in the reserved cell, it is checked whether the cell is "empty" in the normal cell having a higher priority (step 912). If present, cartridge media 60
4 is moved to the cell of the "empty" state having the higher priority,
After setting the “state” to normal, the scheduled use counter is set to “1” and the process ends (step 914).

If there is no “empty” normal cell at the stage of step 912, step 510 of FIG.
(Step 9)
13). After that, the above-mentioned step 914 is executed and the processing ends.

Next, effects of the embodiment of the present invention will be described. In the embodiment of the present invention, in order to re-allocate reserved media to be used so that high-speed access can be performed by pre-analyzing all input applications, short-term intensive use of media or infrequently used media High-speed access is possible even when using.

Also, in order to change the discharge cell to a position close to the drive so that the used medium can be discharged at a high speed with respect to the medium being used in the drive, the medium at a position distant from the drive is used after the drive is used. High-speed access is possible when there is a continuous medium to be used next.

Further, the medium relocation operation for high-speed access is basically performed between a plurality of reserved cells and other normal cells, so that it is efficient and does not hinder the original medium movement operation. .

In the history means 151, even if a medium which is more likely to be used than the past history is arranged near the drive, high-speed access according to the usage of the cartridge type medium in the current computer system is possible. And

[0094]

As described above, the first effect of the high-speed access method of the library apparatus according to the present invention is that even when the medium is intensively used for a short period of time or when the medium which is not frequently used is used. Another advantage is that the moving time of the medium can be shortened.

The reason is that all the input applications are pre-analyzed and the reserved medium to be used is rearranged so that it can be moved at a high speed.

The second effect is that the access time of the medium can be shortened when a medium stored at a position distant from the drive is used successively after the medium is used in the drive. .

The reason is that the discharge cell is changed to a position close to the drive so that the used medium can be discharged at a high speed with respect to the medium used in the drive.

A third effect is that the medium relocation operation for high-speed access is performed efficiently and does not hinder the original medium movement operation.

The reason is that the medium relocation operation for high-speed access is basically a movement between a plurality of reserved cells close to the drive and other normal cells, so that the number of operations is small and efficient. .

The fourth effect is to provide high-speed access by executing a relocation process for a cartridge medium which will be used in an application to be executed in the future.

The reason is that the usage history of the cartridge type medium is obtained, and the medium which will be used as a result is arranged near the drive to provide high-speed access.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a high-speed access method for a library device according to the present invention.

FIG. 2 is a configuration diagram showing a high-speed access library device of the library device of the present invention.

FIG. 3 is a configuration diagram showing addresses of cell blocks of the library device of the high-speed access system of the library device of the present invention.

FIG. 4 is a configuration diagram showing contents of a medium reservation storage unit of a high-speed access method of the library device of the present invention.

FIG. 5 is a configuration diagram showing the contents of a storage unit of the high-speed access system of the library device of the present invention.

FIG. 6 is a flowchart showing the operation of the application prefetch analysis means of the high-speed access method of the library device of the present invention.

FIG. 7 is a flowchart showing the operation of the medium relocation processing of the relocation instruction generation means of the high-speed access method of the library device of the present invention.

FIG. 8 is a flowchart showing the operation of the discharge cell changing process of the discharge control means of the high-speed access method of the library device of the present invention.

FIG. 9 is a flowchart showing an operation of reserved cell relocation processing of the high-speed access method of the library device of the present invention.

FIG. 10 is a flowchart showing an operation of a normal cell relocation process of the high-speed access method of the library device of the present invention.

FIG. 11 is a flowchart showing an operation of the library device of the present invention for obtaining a usage history of a cartridge medium of a high-speed access method.

FIG. 12 is a flowchart showing an operation of selecting a medium to be used from the use history of the high-speed access method of the library device of the present invention.

FIG. 13 is a flowchart showing an operation of selecting a medium to be used from the use history following FIG. 12 of the high-speed access method of the library device of the present invention.

FIG. 14 is a configuration diagram showing storage contents of a used medium storage unit of the high-speed access method of the library device of the present invention.

FIG. 15 is a configuration diagram illustrating a storage position control method of a cartridge type medium in a conventional library device.

FIG. 16 is a configuration diagram showing a table on a storage device for storing management information of a cartridge-type medium in a storage position control method of a cartridge-type medium of a conventional library device.

[Explanation of symbols]

 Reference Signs List 101 main storage device 102 application 103 high-speed access means 104 application prefetch analysis means 105 emission control means 106 relocation instruction generation means 107 storage storage part 108 medium reservation storage part 109 transfer instruction generation means 110 input / output control means 111 central processing unit 112, 605 Library device 151 History means 152 History writing analysis means 153 Used medium storage unit 154 Working day storage unit 155 Parameter storage unit 201 Cell 202 Cell block 203 Robot 204 X axis 205 Y axis 206, 601 Drive 207 Medium 602 Shelf 603 Auto changer mechanism 604 Cartridge type medium 606 Flag information 607 Counter

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-2-281319 (JP, A) JP-A-7-153166 (JP, A) JP-A-2-281318 (JP, A) JP-A-6-281318 51912 (JP, A) JP-A-6-35616 (JP, A) JP-A-8-339265 (JP, A) JP-A-5-204557 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) G06F 3/06 G11B 15/68 G11B 17/22

Claims (3)

(57) [Claims] 1. An application prefetch analysis means for prefetch analysis of an input application and extracting a reserved medium to be used, and a relocation for preliminarily moving a reserved medium near a drive to speed up a moving time of the medium. A high-speed access method for a library device, comprising: an instruction generation unit. 2. An application prefetch analysis means for prefetch analysis of all input applications and extracting a reserved medium to be used, and a medium for storing information on a reserved medium to be used by the application prefetch analysis means, if any. A reservation storage unit, a storage storage unit for storing pre-defined reserved cell information, a relocation instruction generating means for previously moving a reserved medium to a reserved cell near a drive based on the information, and moving the medium from the drive to the cell A high-speed access method for a library device, comprising: a discharge control means for changing a storage cell of a medium to a position near a drive. 3. A history writing analysis means for analyzing the usage status of a cartridge type medium in a library device which is used every day, a usage medium storage unit for storing the usage status of the cartridge type medium from the history writing analysis means, A working day storage unit for storing a working day on which the computer is operated, a parameter storage unit for designating the operation of the computer, and a daily / weekly / monthly basis based on information stored in the used medium storage unit. A high-speed access method for a library device, comprising a history means for grasping the use status of a device, selecting a cartridge type medium to be used before the execution of an application is started, and moving it to a reserved cell in advance.