JPS63231545A - File transfer system - Google Patents

Abstract

PURPOSE:To rapidly execute the file transfer between different types with a virtual file by providing a control means to convert and read actual file data read from an actual file to virtual file data with a data converting means. CONSTITUTION:In accordance with a parameter to designate a document type to show the structure of the virtual file of a command, a processor 41 loads a firmware (converting program) to convert actual file data read from an actual file to virtual file data from a disk device 3 to an internal memory 44 and activates this. Consequently, when a driving controller 43 drives and controls the disk device 3 and the actual file data are read on a bus 42, the converting program on the internal memory 44 converts the read actual file data to the virtual file data and outputs them onto a system bus 2. The file transferring program to run on a CPU 1 transfers the virtual file data to other computer system which is not shown in a figure.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a file transfer system that performs mutual conversion between virtual files and real files to enable file transfer between different types of files. .

(Prior Art) Generally, file system specifications differ depending on the type of computer (O8). Therefore, file transfer between different species is
This is achieved by using virtual files that abstract the specifications of files (real files) unique to each system.

FTA14 is a transfer system based on the idea of virtual files.
rAccess and Management)
is being considered as an international standard by ISO.

Currently, several file transfer systems conforming to the above-mentioned FTAH standards have been implemented, but all of these systems perform conversion between virtual file data and real file data within a file transfer program.

For this reason, there are disadvantages in that the load on the file transfer program is large and the transfer process takes time, and if the specifications of the actual file change, the file transfer program must also be changed.

(Problems to be Solved by the Invention) In the conventional system that uses virtual files to transfer files between Minoh models, the conversion between virtual files and real files is performed within the file transfer program, so there is a problem with the transfer process. This method has drawbacks such as being time consuming and requiring changes to the file transfer program if the specifications of the actual file change.

Therefore, the present invention eliminates the above-mentioned drawbacks, and enables quick file transfer between different models using virtual files, and also eliminates the need to change the file transfer program even if the specifications of the real file change. It is not intended to provide a file transfer system.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a controller that controls reading and writing of data to an external storage device, and a data conversion means that mutually converts real file data and virtual file data; Converting given virtual file data into real file data by the data converting means and writing it into the real file, and converting real file data read from the real file into virtual file data by the data converting means. The reading control means is provided.

(Function) In the file transfer system of the present invention, the control means of the controller of the external storage device that stores the real file executes the given virtual file data by the data conversion means that mutually converts the real file data and the virtual file data. The real file data which is converted into file data and written into the real file, and which is read from the real file, is converted into virtual file data by the data conversion means and read out. This allows the controller to mutually convert real file data and virtual file data.

(Example) An example of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing an embodiment of the file transfer system of the present invention. 1 is a CPtJ of the computer, 2 is a system bus, 3 is a disk device which is an external memory/base device for storing real files, and 4 is a disk controller that controls the disk device 3.

FIG. 2 is a block diagram showing a detailed example of the disk controller 4 shown in FIG. 1. 41 is a control processor, 42 is an internal bus, 43 is a drive controller for driving the disk of the disk device 3, and 44 is an internal memory used for mutual conversion between virtual file data and real file data.

Next, the operation of this embodiment will be explained. First, the operation of writing virtual file data received from a computer system of a different type (not shown) to a real file in the disk device 3 of this computer will be described.

First, a command (virtual write) indicating the start of writing virtual file data is sent to the processor 41 of the disk controller 4 via the system bus 2 from a file transfer program running on the CPUI.

This command includes a parameter that specifies a document type (defined by ISO) that indicates the structure of the virtual file, and the processor 41 of the disk controller 4 that receives this command specifies the document type. Accordingly, firmware (conversion program) for converting the virtual file data into real file data is loaded from the disk device 3 into the internal memory 44 and activated. As a result, the conversion program in the internal memory 44 receives virtual file data obtained via the internal bus 42, converts it into real file data, and sends it to the drive controller 43 via the bus 42. The drive controller 43 drives and controls the disk device 3 and writes the sent real file data to the disk device 3.

Next, a case will be described in which real file data read from a real file in the disk device 3 of this computer is transferred to another computer as virtual file data. First, C
A command (virt) indicating the start of reading virtual file data from a file transfer program running on PtJl
ual read) is sent to the processor 41 of the disk controller 4.

The processor 41 transfers firmware (conversion program) for converting the real file data read from the real file into virtual file data from the internal memory from the disk device 3 according to the parameter specifying the document type indicating the structure of the virtual file in the command. 44 and launch it.

As a result, when the drive controller 43 drives and controls the disk device 3 to read real file data onto the bus 42, the conversion program on the internal memory 44 converts the read real file data into virtual file data and converts the read real file data into virtual file data. Output on bus 2.

A file transfer program running on the CPU 1 transfers the virtual file data to another computer system (not shown).

Note that when it is desired to locally access a real file in the disk device 3, the CPU 1 sends a normal write/read command to the processor 41 of the disk controller 4. As a result, the processor 41 does not start the conversion program in the internal memory 44, and the drive controller 43 reads and writes the real file data directly into the real file in the disk device 3.

According to this embodiment, since the mutual conversion between virtual file data and real file data is performed by the disk controller 4 instead of the file transfer program, the load of the file transfer program is distributed to the disk controller 4, so that file transfer is possible. Processing speed can be improved, and there is no need to change the file transfer program according to the virtual file specifications of real files, thereby improving system operability.

[Effects of the Invention] As described above, according to the file transfer system of the present invention, file transfer between different models using virtual files can be performed quickly, and even if the specifications of the real file change, the file transfer can be performed quickly. This has the effect of eliminating the need to change programs.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the file transfer system of the present invention, and FIG. 2 is a block diagram showing a detailed example of the disk controller shown in FIG. 1. 1...CPU 2...System bus 3.
...Disk device 4...Disk controller agent Patent attorney Nori Chika Nori Sokuma Sanno - Figure 1 Figure 2

Claims (1)

[Claims] A controller that controls reading and writing of data to an external storage device includes data conversion means for mutually converting real file data and virtual file data, and a controller that converts given virtual file data into real file data by the data conversion means. A file transfer system comprising: control means for writing the real file data into the real file, and converting the real file data read from the real file into virtual file data by the data conversion means and reading the virtual file data.