JPH0479091A - Control method for optical disk system - Google Patents

Abstract

PURPOSE:To improve the throughput of the system by counting requests to access an optical disk medium at intervals of certain unit time and dynamically changing the position of storage to storage shelves for an optical disk medium specified by the frequency of the access requesting. CONSTITUTION:The requests to access the optical disk medium 12m are counted in certain time units and the position of storage of the optical disk medium 12m on the storage shelves 11 is controlled. Then a control part 15 reads the frequencies of access to all optical disk media 12m (m=1 - n) out of a medium information storage part 16, sorts the frequencies of access in decreasing order, and rearranges the media so that the storage position of the optical disk medium 12m is at a storage position 12n/121 close to an optical disk driver 13. Consequently, the mean movement process of the whole arm for medium movement is shortened and the throughput of the whole system is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a system in which a plurality of optical disk media are stored in a storage shelf, a specified optical disk medium is set in an optical disk drive, and data is read/written. The present invention relates to an optical disc system equipped with a collective optical disc device.

[Conventional technology]

Conventionally, optical disk systems equipped with this type of collective optical disk device have been able to manage multiple optical disk media, but each time the information processing device specifies the name of the optical disk medium, it is possible to manage multiple optical disk media. The control is to store the optical disk medium in its original storage position, take out the optical disk medium from the specified optical disk medium storage position, and set it in the optical disk drive.

[Problem to be solved by the invention]

In the above-mentioned conventional optical disk system, each time an optical disk medium name is specified by an access request from an information processing device, an optical disk medium is set in an optical disk drive from a storage shelf of a collective optical disk device, and then returned to the original storage shelf position. Depending on the storage position of the optical disk medium to be accessed and stored in the storage shelf, the travel distance of the medium moving arm (accessor) that takes out the optical disk medium from the storage shelf becomes large, which reduces the access performance and reduces the throughput of the optical disk system. The disadvantage is that the value decreases.

[Means to solve the problem]

The control method for an optical disk system of the present invention includes a storage shelf that is connected to an information processing device and can store a plurality of optical disk media, an optical disk drive that reads/writes data, and an optical disk drive that automatically controls the optical disk media in the storage shelf. In an optical disk system equipped with a collective optical disk device that is set in an optical disk drive and has an accessor that automatically returns processed optical disk media to the storage shelf using an optical disk drive, a storage shelf in the collective optical disk device is provided. When multiple optical disk media are set in the accessor and data read/write processing is performed in the optical disk drive, the specified optical disk medium is transferred from the storage shelf to the optical disk drive by specifying the medium name of the optical disk medium from the information processing device. When setting the system, access requests for the specified optical disk medium are counted in a certain unit time, and the storage position of the specified optical disk medium in the storage shelf is dynamically changed depending on the number of access requests.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of an optical disk system according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a collective optical disk device.

In FIGS. 1 and 2, the collective optical disk device 1 counts the number of access requests for the optical disk medium 12m (m=1 to n) in a certain time unit, and can control the storage position of the optical disk medium 12m on the storage shelf. It has a control function.

The first information processing device 2 and the second information processing device 3 make an access request to the collective optical disk device 1, and the first information processing device 2 has a central processing unit (CPU) and memory, and the second information processing device 2 The information processing device 3 has a cathode ray tube (CRT) and a keyboard.

In FIG. 2, a collective optical disk device 1 includes a storage shelf 11 that stores n optical disk media 12m (m=1 to n), and an optical disk in which the optical disk media 12m of the storage shelf 11 are set and performs read/write processing. The drive 13, the medium moving arm 14 that transports the optical disk medium 12m to the optical disk drive 13, counts access requests for the optical disk medium 12m in a certain time unit, and
It is comprised of a control section 15 that controls the storage position of the optical disc medium 12m on the storage shelf 11, and a medium information storage section 16 that stores the storage position of the optical disk medium 12m on the storage shelf 11 and the number of access requests.

Here, when an access request is issued to the optical disk medium from the second information processing device 3, the first information processing device 2 issues an access request to the collective optical disk device 1 based on the optical disk medium name.

In the collective optical disk device 1, the control unit 15 extracts information on the same medium name (medium storage location and access count information) from the medium information stored in the medium information storage unit 16, increments the access count by one, and The access count information is stored again, and the optical disk medium 12m is taken out by the medium moving arm 14 and set in the optical disk drive 13.

Furthermore, when the data access to the optical disk medium 12m is completed, the optical disk medium 12m is stored again in the original possible position.

After performing the above processing for a certain period of time, the control section 15 stores all the optical disk media 12rr (m=
1 to n) are read out, sorted in descending order of the number of accesses, and the optical disk medium 12 is
The arrangement is rearranged so that the storage position of m is located at the storage position 12n, 12n1.12nz, . . . 121, which is closer to the optical disk drive 13.

Then, the rearranged optical disk medium storage positions are stored in the medium information storage section 16.

At this time, all access counts are initialized.

As a result, frequently accessed optical disk media are rearranged at fixed intervals to storage positions on storage shelves near the optical disk drive.

〔Effect of the invention〕

As explained above, according to the present invention, frequently accessed optical disk media are rearranged to the storage position of the storage shelf near the optical disk drive at regular intervals, so that the average moving distance of the medium moving arm as a whole can be reduced. This has the effect of improving the throughput of the entire optical disk system.

FIG. 2 is a block diagram showing the configuration of the collective optical disk device.

DESCRIPTION OF SYMBOLS 1... Collective photon disk device, 2... First information processing device, 3... Second information processing device, 11... Optical disk medium storage shelf, 12... Optical disk medium, 13... Optical disk Drive, 14... Arm for medium movement, 15.
...Control unit, 16...Medium information storage unit.

Claims (1)

[Scope of Claims] A storage shelf that is connected to an information processing device and can store a plurality of optical disc media, an optical disc drive that reads/writes data, and an optical disc drive that automatically reads and writes the optical disc media of the storage shelf. and an accessor that automatically returns the optical disc medium that has been processed by the optical disc drive to the storage shelf, the storage shelf in the collective optical disc device comprising: When a plurality of the optical disk media are set by the accessor and data read/write processing is performed by the optical disk drive, the specified optical disk medium is set to the When setting the optical disk medium from the storage shelf into the optical disk drive, access requests for the specified optical disk medium are counted in a certain unit time, and the storage position of the specified optical disk medium in the storage shelf is dynamically determined based on the number of access requests. A control method for an optical disc system characterized by changing to.