KR930007064B1 - Method of operating data in digital audio tape recorder - Google Patents

Abstract

This invention is about the data operating method of DATA/DAT (digital audio tape recorder) to record digital data in tape, and specially blocking the distributed record of data in case of recording adding data in the recorded file. This device comprises the re-recording process for re-record file after setting a vacant tape interval by moving the recorded file which has insufficient recording space in case of adding file, the adding record process to record data next to re-recorded file, and the file setting process to set the connection file at once after performing adding record process.

Description

Data / DAT Data Operation Method

Figure 1a is a hardware block diagram of data / DAT.

FIG. 1B is a specific view of the interfacing control unit 20 shown in FIG. 1A.

2 is a conventional data recording format on tape.

3 is a flow chart of a conventional data operation control.

4 is a data recording format diagram on a tape according to the present invention.

5 is a control flowchart of the present invention.

* Explanation of symbols for main parts of the drawings

10: DAT 20: interfacing control unit

30: computer

The present invention relates to a data operation method of data / DAT (Digital Audio tape Recorder) for recording digital data on a tape. In particular, the present invention provides a distributed recording of data when additional data is to be recorded in a recorded file. The present invention relates to a method of operating data / DAT that can be prevented.

In general, in order to store a large amount of digital data used in an information processing device such as a computer, DAT is used as an auxiliary memory device, which is commonly referred to as data / DAT.

In this case, when data is additionally recorded in a file that is already recorded on the tape of the data / DAT, if the tape space area of the file is insufficient and additional recording is performed in a separate tape space area, one file is recorded by Busan. Therefore, the access time is long when searching for this. Therefore, it is clear that the performance of any system will be improved if the distributed writing of data can be prevented to reduce the access time during retrieval.

1A is a hardware block diagram of data / DAT, which includes a DAT 10 for recording data on a tape and searching from the tape, and inputting / outputting data to and from the DAT 10. FIG. Computer 30 and an interfacing control unit 20 for controlling data interfacing between the DAT 10 and the computer 30.

A detailed diagram of the interfacing control unit 20 in FIG. 1A of FIG. 1 is shown in FIG. 1B. The microcomputer 25 controls overall operations for controlling interfacing between the DAT 10 and the computer 30. And a controller 22 for data interfacing the small computer system interface (SCSI) unit 21 with the DAT 10 to the input / output data of the computer 30 under the control of the microcomputer 25; It is composed of an ECC (Error Correction Code) unit 23 and a RAN 24 which are connected to the controller 22 and check the error correction of the data. This applies to a large invention.

2 shows a conventional data recording format diagram on a tape, and FIG. 3 shows a control flowchart of a conventional data operation method. Referring to Figs. 1 to 3, the conventional data operating method will be briefly described. In Fig. 2, 2a represents the tape width of the DAT 10 and 2b represents the direction of data recording. Each file AD of data to be recorded on the tape is recorded in the order in which it is output from the computer 30.

In FIG. 2, when the recording of the file D is completed and the data of the file B is additionally recorded, the recording area is insufficient at the location of the file B. Additional recording data (B ') of (B) was recorded. Further, when additionally recording the data of the file C, the additional recording data C 'of the file C is recorded. When the data of the file A is additionally recorded, the addition of the file A is added. Record data (A ') was recorded. After recording the additional recording data A ', files E and F are recorded in order on the tape.

A control flowchart for operating data as shown in FIG. 2 is shown in FIG. 3, and steps (3e) and (3b) determine additional recording of the additional recording data B ', C', and A 'described above. It's a step.

Therefore, when searching for each file distributed and recorded in step (3a) → (3j) in FIG. 3 in step (3K) → (3D), the access time is increased. Is shown.

Therefore, in the related art, data is added to a recorded file and distributed to a tape, thereby causing a problem in that the access time is long during retrieval.

Accordingly, an object of the present invention is to provide a data / DAT data operating method capable of preventing distributed recording of data in view of the above problems.

Another object of the present invention is to provide a method of operating data / DAT that can reduce the access time when retrieving data / DAT.

The present invention for achieving the above object is characterized by recording the file and the file to be recorded in one space area on the tape when additional data of the same file is recorded on the tape.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 4 is a data recording format diagram on a tape according to the present invention. When the data of the file B 'is added to the data of the file B in the M area, the space B on the tape is insufficient. + B ') indicates recording.

5 is a control flow chart of the present invention. When a recording space area of a file to be added is added when additional data is recorded on a file recorded on a tape, the recorded file is moved to search a blank tape section, and then the recorded file is deleted. A rewriting process for rewriting, an additional recording process for recording data of a file to be added after performing the rewriting process next to the rewritten file, and a file search for searching the file at the time of search after performing the additional recording process The process takes place.

Hereinafter, the present invention will be described in detail with reference to FIG. 4 and FIG. 5 based on the above-described configuration. The search of the file is done only once to reduce the access time.

In Fig. 4, (4a) indicates the recording direction of the data, and when the files A, B, C, and D are already recorded on the tape, the file B 'of additional recording data is added to the file B. In case of recording, it is recorded at the same time in the N section. That is, the recorded file B is moved to the N section, and the file B 'is continuously recorded after rewriting.

Therefore, the M section remains as a blank tape section, and may be usefully used if the file of data to be additionally recorded in the file A is smaller than the M section.

5 is a control flowchart for recording data on a tape as shown in FIG.

The control flow of FIG. 5 is performed in the DAT 10 of FIG. 1A, and the interfacing control unit of FIG. 1B of FIG. 20) must be followed.

In FIG. 5, step (5a) is a step for determining whether the recording mode or the search mode is used. In this case, whether the DAT 10 records the data of the computer 30 on the tape. The computer 30 judges whether or not the computer 30 intends to search for the file of the data recorded in the file. In the above-described step (5a), the process proceeds to the (5b) step in the recording mode, and the procedure (5k) in the search mode. Step (5b) is a step for judging whether data to be recorded on the tape is a new file or data to be added to an already recorded file. Therefore, if it is a new file, steps (5c) → (5g) are performed. This is a general file recording control flow.

If it is determined in step (5b) that the additional recording data for the predetermined file, that is, the file B 'in FIG. 4, the process proceeds to step (5h). In step (5b), it is determined whether there is a tape space area to which the file B 'can be added in the area M of FIG. In step (5h), if the tape space area is sufficient, step (5j) is performed, and if not, step (5i) is performed. In the step (5i), the file B recorded in the area N from the area M of FIG. 4 is moved. In step (5i), the file B recorded in the area N from the area M of FIG. 4 is moved. After performing step (5i), the step (5e) → (5d) is performed.

Therefore, the rewriting process is a step (5h)-> (5i)-> (5c)-> (5d). Further, the additional recording process is the above step (5e). Step (5K) → (50) is the file search process.

Therefore, the data for the same file is concentrated and recorded without being distributedly recorded by the above processes. Therefore, the file search process can read a predetermined file in one search, thereby reducing access time.

As described above, the present invention has an advantage in that the access time is reduced by improving the performance of the system by distributing and recording the data for the same file when operating the data for any file.

Claims (1)

A data operating method of a device for recording / reproducing digital data by tape, wherein a file to be added when additional data is recorded on a file recorded on a tape is moved to the blank file by moving the recorded file while the recording space area is insufficient. After searching, it consists of a rewriting process for rewriting the recorded file, an additional recording process for recording after the rewritten file, and a file search process for searching the file at the time of search after performing the additional recording process. Data operating method of data / DAT characterized in that.

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