JPS62177621A - Disk device - Google Patents

Abstract

PURPOSE:To attain simultaneous accessing from plural terminals by adding a memory of large capacity that can file plural pages as a page memory. CONSTITUTION:An optical disk medium requested by a terminal 12 is set to a gathering optical disk drive 1. When a copy instruction is delivered for plural pages, the requested command is sent to a disk device 10 via a terminal controller 11. The disk 10 decodes the command via a control part 5 and the image data on plural pages are stored temporarily in a page memory 4 via a buffer memory 3. Then these data are read out of the memory 4 as soon as a printer of a retrieving terminal 12 is ready and sent to the terminal 12 via the buffer memory 3 and a reading part 2. At the same time, an optical disk medium requested by a retrieving terminal 13 that received the next access is set to the drive 1. Then the requested image data is read out of the drive 1 and sent to the terminal 13 via the part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a disk device, and more particularly to a collective optical disk device for storing and retrieving image data.

BACKGROUND OF THE INVENTION A conventional collective optical disk device of this type has a configuration as shown in FIG. In the figure, 1 is a disk drive, 2 is a reading section, 3 is a buffer memory, 5 is a control section, and 6 and 7 are input/output ends of the device, respectively. Third
The figure shows the disk drive device (numeral 10) shown in FIG.
FIG. 1 is a schematic block diagram of a data retrieval system using a data retrieval system (as shown in FIG. In the figure, 11 indicates a terminal controller, and 12 to 14 indicate a plurality of search terminals.

In the system configuration shown in FIG. 2.3, when multiple search terminals access different optical disk media at the same time, one search is performed because multiple pages of image data cannot be stored in the buffer memory 3 of the disk device 10. While serving a terminal, it was not possible to serve other search terminals.

In other words, when one terminal makes a copy request for multiple pages of image data, the copying speed is generally slower than the reading speed of an optical disc, so unless access is allowed from other terminals, the other terminal will wait until the copy is completed. The disadvantage is that it requires too much time. On the other hand, if access from other terminals is allowed, the optical disc medium must be changed frequently, and this process takes too much time.

OBJECTS OF THE INVENTION An object of the present invention is to provide a disk device that allows simultaneous access from a plurality of terminals by adding a capacity memory capable of storing a plurality of pages as a page memory.

Composition of the Invention According to the present invention, there is provided a disk device in which stored data is read out by an external access command, including a buffer memory for temporarily storing data read out by a disk drive means, and a buffer memory larger than the buffer memory. and memory means for further storing data stored in the buffer memory.

Example Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and parts equivalent to those in FIG. 2 are designated by the same reference numerals.

The difference from the conventional example shown in FIG. 2 is that a so-called page memory 4 capable of storing a plurality of pages of image data is added in addition to the buffer memory 3.

FIG. 3 is an example of a system having a cluster configuration using the collective optical disk device shown in FIG. In Figure 3,
Assume that a plurality of search terminals 12 and 13 access the collective optical disk device 10 via the terminal controller 11 at the same time. At this time, if the configuration shown in FIG. 1 is adopted, the optical disk medium requested by the first search terminal 12 is the first
It is set in the collective optical disk drive 1 shown in the figure. next,
When a command is issued to copy multiple pages, the requested command is sent to the collective optical disk device 10 via the terminal controller 11. As shown in FIG. 1, in the collective optical disk device 10, the command is input to the control section 5 and decoded, and the image data of a plurality of pages are temporarily stored in the page memory 4 via the buffer memory 3. The stored plurality of image data are sequentially read out from the page memory 4 as soon as the printer of the search terminal 12 is ready, and sent to the search terminal 12 through the buffer memory 3 and the reading section 2. At the same time, the optical disk medium requested by the next accessed search terminal 13 is loaded onto the collective optical disk drive 1, and the requested image data is read out from the collective optical disk drive 1. It is sent to the search terminal 13 via section 2.

Although one embodiment of the present invention has been described above, it goes without saying that a storage device such as a magnetic disk can be used instead of the page memory 4.

As described in detail, according to the present invention, by adding a page memory or a magnetic disk, etc., which temporarily stores image data read from a collective optical disk drive, it is possible to search multiple search terminals. This has the advantage that image data can be serviced at high speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of a conventional collective optical disk device, and FIG. 3 is a system block diagram to which the embodiment of the present invention is applied. Explanation of symbols of main parts 1...Disk drive 2...Reading section 3...Buffer memory 4...Page memory

Claims (1)

[Claims] A disk device in which stored data is read by an external access command, comprising a buffer memory for temporarily storing data read by a disk drive means, and a buffer memory having a larger capacity than this buffer memory and storing data in the buffer memory. and memory means for further storing the data.