JPH08263220A - Data input and output device - Google Patents

Abstract

PURPOSE: To accelerate rate for inputting and outputting data by shortening the processing time of write and read to a disk medium by reducing the moving amount of a head on the disk medium. CONSTITUTION: A data reception control part 4 receives data from the outside and writes them in a data buffer part 2 having capacity enough for storing data for one track on a magnetic disk medium 1, and a data transmission control part 5 reads the data from a data buffer part 3 having capacity enough for storing data for one track on the magnetic disk medium 1 and transmits them to the outside. A magnetic disk control part 6 performs data write and data read between the data buffer parts 2 and 3 and the magnetic disk medium 1. The magnetic disk control part 6 once writes data into the magnetic disk medium 1 for the unit of a track length on the magnetic disk medium 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data input / output device, and more particularly to a data input / output control system in a gateway device or the like.

[0002]

2. Description of the Related Art Conventionally, as a data input / output control system of this kind, a series of data is divided into sector units of a magnetic disk medium because the amount of data generally handled is comparatively small, and the sector unit is divided. Data is written on the magnetic disk medium, or sector data is read from the magnetic disk medium.

[0003]

In the above-mentioned conventional data input / output control system, since data is written in the magnetic disk medium in sector units, while writing or erasing variable-length data over a plurality of sectors is repeated. In addition, a series of data is physically scattered in units of sectors on the magnetic disk medium.

Therefore, when data is read from the magnetic disk medium in units of sectors, if the data is physically scattered in units of sectors by the above-described write processing on the magnetic disk medium, the heads on the magnetic disk medium are read. The amount of movement of the item increases and the processing time increases.

In particular, in an apparatus which is required to process a large amount of data such as high-definition image data at a high speed, the writing / reading processing time in the magnetic disk medium is greatly increased with respect to its performance. It will be a loss.

Therefore, an object of the present invention is to solve the above-mentioned problems, reduce the amount of movement of the head on the disk medium, and shorten the write / read processing time for the disk medium. An object of the present invention is to provide a data input / output device capable of improving the speed of the above.

[0007]

A data input / output device according to the present invention has a receiving function of writing data received from the outside to a disk medium, and reading the data written by the receiving function from the disk medium to the outside. A data input / output device that processes a transmission function for transmitting in parallel in a time-sharing manner,
Storage means for storing write data to the disk medium and read data from the disk medium, data reception control means for receiving data from the outside and writing the data in the storage means, and reading from the disk medium. Data transmission control means for reading the data stored in the storage means from the storage means and transmitting the data to the outside, and one track length of the data in the storage means to the disk medium in response to an instruction from the data reception control means. And a disk control means for reading data from the disk medium in units of one track length and writing the data in the storage means in response to an instruction from the data transmission control means.

[0008]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 1, a data input / output device according to an embodiment of the present invention includes a magnetic disk medium 1, data buffer units 2 and 3 having a capacity sufficient to store one track of data on the magnetic disk medium 1. A data reception control unit 4 that receives data from the outside and controls writing to the data buffer unit 2, a data transmission control unit 5 that reads data from the data buffer unit 3 and controls data transmission to the outside, and a data buffer The magnetic disk controller 6 controls the writing of data from the unit 2 to the magnetic disk medium 1 and the reading of data from the magnetic disk medium 1 to the data buffer unit 3.

FIG. 2 is an explanatory diagram showing a data storage format on the magnetic disk medium 1 of FIG. In the figure,
Data size information, next track number information, and data are stored in the tracks 1 to n on the magnetic disk medium 1, respectively.

The operations of writing data to the magnetic disk medium 1 and reading data from the magnetic disk medium 1 by the data input / output device of one embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The data reception control unit 4 requests the magnetic disk control unit 6 to acquire a data buffer for reception at the start of reception of a series of data. In response to the data buffer acquisition request from the data reception control unit 4, the magnetic disk control unit 6 obtains the information amount of the data size information and the next track number information shown in FIG. 2 from the capacity of one track on the magnetic disk medium 1. Calculate the buffer limit size by subtracting.

The magnetic disk control unit 6 allocates an arbitrary area in the data buffer unit 2 as a data reception buffer, and returns the head address of the data reception buffer and the buffer limit size to the data reception control unit 4.

The data reception control unit 4 receives data from the outside and sequentially writes the data into the data buffer unit 2. When the data write for the buffer limit size is completed, the data reception control unit 4 outputs a disk write request to the magnetic disk control unit 6.

When the magnetic disk controller 6 receives a disk write request, the data size information and the next track number information are added to the requested data and the data for one track is written to the magnetic disk medium 1. After that, the magnetic disk control unit 6 responds to the data reception control unit 4 with a disk write completion notification.

Upon receiving the disk write completion notification, the data reception control unit 4 restarts the above-described data writing to the data buffer unit 2 and repeats the above processing until a series of data reception is completed.

When a series of data reception is completed, the data reception control unit 4 adds the information indicating the final data and the data amount of the final data block to the magnetic disk control unit 6 and outputs a disk write request.

When the magnetic disk control unit 6 receives the disk write request for the final data, the magnetic disk control unit 6 writes the data on the magnetic disk medium 1 in the same manner as the above-mentioned processing, and the data for a plurality of tracks written by a series of processing is written. Manage as one file.

On the other hand, when the data transmission control section 5 detects the condition for starting the data transmission, it outputs a disk read request to the magnetic disk control section 6. Magnetic disk controller 6
When a disk read request is received from the data transmission control unit 5, one track of data is read from the magnetic disk medium 1 to the data buffer unit 3, and the start address and data size information of the data unit shown in FIG. 2 are added. Returns the disc read completion.

When the data transmission control unit 5 receives the disk read completion, the data transmission control unit 5 performs a data transmission process for the data size notified by the magnetic disk control unit 6. When the data transmission control unit 5 finishes the data transmission process of the data buffer unit 3, it again outputs a disk read request to the magnetic disk control unit 6, and repeats the above-described data transmission process.

In response to a disk read request, the magnetic disk control unit 6 reads the data for one track from the magnetic disk medium 1 into the data buffer unit 3, and when it detects that it is the last block of the file, transmits the data. The disc read completion is returned to the control unit 5 together with the information indicating that the data is the final data.

The data transmission control unit 5 includes a data buffer unit 3
When the information indicating that the data is the final data is detected after the data transmission processing of (1) is completed, the series of data transmission processing is ended. Here, the data transmission control unit 5 controls the data transmission to the outside asynchronously with the operation of the data reception control unit 4.

FIG. 3 is a flow chart showing the operation of the data reception control unit 4 of FIG. 1, FIG. 4 is a flow chart showing the operation of the data transmission control unit 5 of FIG. 1, and FIG.
6 is a flowchart showing the operation of the magnetic disk control unit 6 of FIG. 6, and FIG. 6 is a timing chart showing the operation of the embodiment of the present invention. The operation of the embodiment of the present invention will be described with reference to FIGS.

The data reception control unit 4 starts the reception of a series of data (step S1 in FIG. 3), and the magnetic disk control unit 6
To request acquisition of a data buffer for reception (step S2 in FIG. 3).

The magnetic disk control unit 6 checks whether or not there is a data buffer acquisition request from the data reception control unit 4 (step S21 in FIG. 5). When the data reception control unit 4 inputs the data buffer acquisition request, 1 on the magnetic disk medium 1 in response to the data buffer acquisition request
The buffer limit size is calculated by subtracting the information size of the data size information and the next track number information shown in FIG. 2 from the capacity of the track (data reception buffer acquisition process).
(FIG. 5 step S22).

The magnetic disk control unit 6 allocates an arbitrary area in the data buffer unit 2 as a data reception buffer, and returns the start address of the data reception buffer and the buffer limit size to the data reception control unit 4 (data buffer). Acquisition response) (step S23 in FIG. 5).

If there is a data buffer acquisition response from the magnetic disk control unit 6 (step S3 in FIG. 3), the data reception control unit 4 receives data from the outside and sequentially writes the data into the data buffer unit 2 (data reception process) ( Figure 3 Step S
4).

When the data reception control unit 4 completes the data writing for the buffer limit size, it checks whether the external data reception is completed (step S5 in FIG. 3). If the external data reception is not completed, the magnetic disk control is performed. A disk write request is output to the unit 6 (step S in FIG. 3).
6).

When the magnetic disk controller 6 receives the disk write request (step S24 in FIG. 5), the data size information and the next track number information are added to the requested data, and the magnetic disk medium 1 is processed as one track of data.
Write to (step S25 in FIG. 5). After that, the magnetic disk control unit 6 responds to the data reception control unit 4 with a disk write completion notification (step S26 in FIG. 5).

When the data reception control unit 4 receives the disk write completion notification (step S7 in FIG. 3), the data write control unit 4 restarts the above-described data write to the data buffer unit 2 and executes the above-described processing (step The processing of S4 to S7) is repeated.

When the series of data reception is completed, that is, when the data reception from the outside is completed, the data reception control unit 4 sends the information indicating the final data and the data amount of the final data block to the magnetic disk control unit 6. A disk write request (final data block) is added and output (step S8 in FIG. 3).

When the magnetic disk control unit 6 receives the disk write request for the final data, the magnetic disk control unit 6 writes the magnetic disk medium 1 in the same manner as the above-described processing (processing in steps S24 and S25), and writes in a series of processing. Data for multiple tracks is managed as one file. After that,
The magnetic disk controller 6 responds to the data reception controller 4 with a disk write completion notification (step S2 in FIG. 5).
6).

When the data reception control unit 4 receives the disk write completion notice for the final data block (step S9 in FIG. 3), it ends the series of data reception processing and returns to the processing of step S1 to transfer a series of data from the outside. Wait for the start of reception.

On the other hand, when the data transmission controller 5 detects the condition for starting data transmission (step S11 in FIG. 4), it outputs a disk read request to the magnetic disk controller 6 (step S12 in FIG. 4).

When the magnetic disk control unit 6 receives a disk read request from the data transmission control unit 5 (step S in FIG. 5).
27), data for one track is read from the magnetic disk medium 1 to the data buffer unit 3 (step S2 in FIG. 5).
8), the head address of the data section shown in FIG. 2 and the data size information are added and the disc read completion is returned (step S29 in FIG. 5).

Upon receiving the disk read completion (step S13 in FIG. 4), the data transmission control unit 5 checks whether the disk read is the final data block read (step S14 in FIG. 4).

If the final data block is not read, the data transmission control unit 5 performs a data transmission process for the data size notified by the magnetic disk control unit 6 (step S15 in FIG. 4). When the data transmission control unit 5 finishes the data transmission process of the data buffer unit 3, the data transmission control unit 5 outputs a disk read request to the magnetic disk control unit 6 again, and repeats the above-described data transmission process (steps S12 to S15). .

In response to a disk read request, the magnetic disk controller 6 reads data from the magnetic disk medium 1 into the data buffer unit 3, and when it detects that it is the last block of the file, transmits the data. The disc read completion is returned to the control unit 5 together with the information indicating that the data is the final data.

When the data transmission control unit 5 detects the information indicating that the data block is the final data block, the data transmission process is terminated (step S16 in FIG. 4), the series of data transmission processes is terminated, and the process returns to step S11. Wait for the condition for starting data transmission to be met.

As shown in FIG. 6, the data transmission control unit 5 controls the data transmission to the outside asynchronously with the operation of the data reception control unit 4. That is, the data transmission control unit 5
The disk write request is performed asynchronously with the data buffer acquisition request and the disk write request of the data reception control unit 4.

Further, the processing of each of the data reception control unit 4 and the data transmission control unit 5 is in a suspended state during the writing process and the reading process for the magnetic disk medium 1 by the magnetic disk control unit 6, and the others are in the dispatch state.

Further, when the data reception process by the data reception control unit 4 and the data transmission process by the data transmission control unit 5 are performed, the time slice is performed when the process for the magnetic disk medium 1 is performed by the magnetic disk control unit 6. Occurs.

Furthermore, in the above processing, writing and reading with respect to the magnetic disk medium 1 have been described.
If writing and reading can be performed in sector units and track units, the present invention can be applied to other disk media such as optical disk media.

As described above, the magnetic disk control unit 6 controls the magnetic disk medium 1 in accordance with the disk write request and the disk read request from the data reception control unit 4 and the data transmission control unit 5, and the data of one track length is used as a unit. By processing writing and reading in a time-sharing manner,
Compared with the conventional technique, the movement amount of the head (not shown) on the magnetic disk medium 1 can be reduced to shorten the processing time of writing / reading to / from the magnetic disk medium 1, thereby increasing the data input / output speed. Can be improved.

[0045]

As described above, according to the present invention, the amount of movement of the head on the disk medium is reduced by performing one write operation on the disk medium in units of the track length of the disk medium. As a result, it is possible to shorten the processing time of writing and reading to and from the disk medium and to improve the speed of data input / output.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

2 is an explanatory diagram showing a data storage format on the magnetic disk medium of FIG. 1. FIG.

3 is a flowchart showing an operation of a data reception control unit of FIG.

FIG. 4 is a flowchart showing an operation of the data transmission control unit of FIG.

5 is a flowchart showing the operation of the magnetic disk control unit of FIG.

FIG. 6 is a timing chart showing the operation of the embodiment of the present invention.

[Explanation of symbols]

 1 magnetic disk medium 2, 3 data buffer section 4 data reception control section 5 data transmission control section 6 magnetic disk control section

Claims (3)

[Claims] 1. Data for performing a time-division parallel processing of a reception function of writing data received from the outside to a disk medium and a transmission function of reading the data written by the reception function from the disk medium and transmitting the data to the outside. An input / output device, storage means for storing write data to the disk medium and read data from the disk medium, and data reception control means for receiving data from the outside and writing the data in the storage means. , Data transmission control means for reading the data stored in the storage means and transmitting the data stored in the storage means to the outside, and data stored in the storage means in response to an instruction from the data reception control means. Writing to the disk medium in units of one track length and responding to an instruction from the data transmission control means, the disk medium A data input / output device comprising: disk control means for reading data from the body in units of one track length and writing the data into the storage means. 2. The storage means includes first storage means for storing data received from the outside and second storage means for storing data read from the disk medium. Item 1. The data input / output device according to item 1. 3. The data input / output device according to claim 2, wherein each of the first and second storage means is configured to store at least the data of one track length.