JPH05151760A - Data recording method for magnetic tape - Google Patents

Abstract

PURPOSE:To provide a data recording method for a magnetic tape capable of retrieving data within a short time. CONSTITUTION:First, the magnetic tape is divided into plural areas A, B and C... corresponding to addresses, the first index table where the content index of the above-mentioned areas A, B and C... and their addresses are related is recorded on the specified position of the above-mentioned magnetic tape and the second index table where the content index of files in the above- mentioned areas A, B and C... and their addresses are related is recorded on each of the above-mentioned areas, as well. Then, specified data corresponding to the content index of the files is recorded on the above-mentioned files.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape data recording method for recording a plurality of data on a magnetic tape in an electronic file device using the magnetic tape.

[0002]

2. Description of the Related Art Conventionally, when data is recorded on a magnetic tape, the data is sequentially recorded from the head position of the magnetic tape, and thereafter, when additional data is recorded, the data is recorded immediately after the recorded portion, The tape area was generally used continuously.

[0003]

However, when the necessary data is extracted from the magnetic tape on which the data is recorded as in the above-mentioned conventional example, since the data are simply listed in the order of recording, the necessary data is not recorded. It is difficult to quickly know where the magnetic tape is located. Therefore, there is a problem that it takes a lot of time to obtain the necessary data.

In view of the above-mentioned conventional problems, it is an object of the present invention to provide a data recording method for a magnetic tape which enables data retrieval in a short time.

[0005]

In order to achieve the above object, the present invention divides a magnetic tape into a plurality of areas corresponding to addresses, and relates the contents list of the areas and the addresses to the first area. A catalog table is recorded at a predetermined position on the magnetic tape, and a second catalog table in which the contents list of the file in each area and its address are related is recorded in each area, and then, in the file, It is characterized in that predetermined data corresponding to the contents list of the file is recorded.

[0006]

According to the present invention, with the above configuration, the operator can read the first catalog table at the time of data retrieval to know the rough position of the target data in the magnetic tape, and further, by the second catalog table, The target data can be specified.
This shortens the distance for fast-forwarding and rewinding the magnetic tape for searching the target data. Therefore, the above problem can be solved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

1A and 1B are magnetic tape format diagrams showing an embodiment of a data recording method according to the present invention. 2 is a flow chart showing the initialization processing of the magnetic tape of the above embodiment, FIG. 3 is a flow chart of the recording operation in the above embodiment, FIG. 4 is a flow chart of the data search operation of the above embodiment, and FIG. 5 is the data of the present invention. It is a block diagram which shows schematic structure of the electronic file apparatus for implementing a recording method.

In FIG. 5, this electronic filing device is
A CPU (Central Processing Unit) 1 for controlling the operation of the entire apparatus is provided, and the CPU 1 has a keyboard 2 for inputting character information and the like, a scanner 3 for reading an image, and a data recording / reproducing process. A recording / reproducing signal processing unit 4 for performing predetermined signal processing, a memory 5 such as a RAM (Random Access Memory), and a monitor 6 for displaying information necessary for an operator are connected to the recording / reproducing signal processing unit 4. On the other hand, recording / reproduction signal processing 4
The magnetic head 7 is connected to the magnetic tape 7 and the magnetic head 7 comes into contact with the magnetic tape 8a stored in the cassette 8.

Next, the operations (A), (B), and (C) of the electronic file device configured as described above will be described.

(A) Initialization process of the magnetic tape 8a In FIG. 2, first, a formatting process of the magnetic tape 8a is performed (step S1). In this formatting process, the array format of the data to be written in the magnetic tape 8a is set and the addresses are arranged. As a result, as shown in FIG. 1A, the magnetic tape 8a is associated with the addresses. A plurality of regions A, B ... Are set. Then, the first inventory table (hereinafter referred to as the first TOC
Say. TOC: Table Of Content)
Start creating. First, while looking at the monitor 6, the operator inputs a title name (content list) for rough classification from the keyboard 2, for example, character data of "minutes",
Next, the address "1000" is input in a form corresponding to the character data of the "minutes" (step S2). Then, the CPU 1 writes the character data of "minutes" and "1000" in the memory 5 (step S3).

If it is necessary to further increase the number of classifications (step S4), steps S3 and S4 are repeated. At that time, for example, "material" is used as the title name and the address "9"
When input in correspondence with “000”, the memory 5 displays
As shown in, the first TOC in which a plurality of title names and their addresses are associated is written (step S5).
Next, the CPU 1 sends a control signal to the recording / reproducing signal processing circuit 4, and causes the first TOC in the memory 5 to pass through the magnetic head 7 to the head position (addresses 0 to 9) of the magnetic tape 8a.
99) (step S6). As a result, the initialization of the magnetic tape 8a is completed, and as a result, recording data can be written on the magnetic tape 8a.

(B) Data Writing Process In FIG. 3, first, the first T
The OC is read and displayed on the monitor 6 (step S1)
1). From the title names of the first TOC displayed on the monitor 6, the title name corresponding to the record data to be recorded, for example, "minutes" is selected (step S12). Next, area A corresponding to this "minutes"
The magnetic tape 8a is fast-forwarded to the address "1000" (step S13), and the title name "O" is input from the keyboard 2.
OO meeting ”, date“ 90-10-20 ”, address“ 2000 ”, etc. are input and written in the memory 5. In this way, a second TOC as shown in FIG. 7 is created, and this is recorded from the position of the address "1000" on the magnetic tape 8a (step S14). After that, the magnetic tape 8a is fast-forwarded to the address "2000" (step S15), the image data corresponding to the title name "OOO meeting" is read from the scanner 3, and the image data is shown in FIG.
It is recorded in the address "2000" of the magnetic tape 8a as the file A-1 shown in (step S16). When the image data has the next page (step S17), step S16 is repeated. Similarly, in the area B of the magnetic tape 8a,
Area C ... also records each second TOC and file.

If you want to add data recording,
After going through steps S11 to S13, the second TOC in the area corresponding to the data is read into the memory 5 and displayed on the monitor 6. Next, after adding the title name, the date, etc., the magnetic tape 8a is fast-forwarded to the first position of the empty area in the area, and the process proceeds to step S16. Thus, for example, the files A-2 and A-3 in FIG.
Additional data is recorded as shown in.

(C) Data Retrieval Process The retrieval of the file A-1 shown in FIG. 1B will be described as an example. In FIG. 4, first, from the magnetic tape 8a to the first
Is read and displayed on the monitor 6 (step S
21). Then, "minutes" is selected from the displayed titles (step S22), and the magnetic tape 8a is fast-forwarded to the address "1000" indicated by the first TOC (step S23).

The second TOC in the area A of the address "1000" is read into the memory 5 (step S2
4), title, date, etc. are displayed (step S2)
5). "OOO Meeting" is selected from the displayed titles, and the magnetic tape 8a is fast-forwarded to the address "2000" of the title (step S27). Then, the first page is read into the memory 5 and displayed on the monitor 6 (step S28). If there is a next page, step S28 is repeated (step S29).

As described above, in this embodiment, the TOC is the first
Since the second TOC is hierarchized, a rough search is first performed by the first TOC when searching for data.
Further, if a search range of necessary data is specified by the second TOC in each area, a quick search can be performed.

In the above embodiment, the first TOC is written on the magnetic tape 8a, and then the second TOC is written. However, after the second TOC is written in each area, the first TOC is written. May be written.

[0019]

As described above, according to the present invention, the magnetic tape is divided into a plurality of areas associated with addresses, and the first inventory table in which the contents list of the areas and their addresses are associated with each other. Is recorded at a predetermined position on the magnetic tape, and a second inventory table in which the contents list of the file in each area and its address are related is recorded in each area, and then the file is written in the file. Since the specified data corresponding to the contents list of is recorded, it is possible to search within one area without searching the entire magnetic tape when searching for data, so the fast-forward and rewind distances are short. Therefore, the target data can be obtained in a short time.

[Brief description of drawings]

FIG. 1 is a format diagram of a magnetic tape showing an embodiment of a data recording method according to the present invention.

FIG. 2 is a flowchart showing an initialization process of the magnetic tape of the embodiment.

FIG. 3 is a flowchart of a recording operation in the above embodiment.

FIG. 4 is a flowchart of a data search operation of the above embodiment.

FIG. 5 is a block diagram showing a schematic configuration of an electronic file device for carrying out the data recording method of the present invention.

FIG. 6 is a diagram showing a format example of a first TOC of the embodiment.

FIG. 7 is a diagram showing a format example of a second TOC in the embodiment.

[Explanation of symbols]

 1 CPU 2 keyboard 3 scanner 4 recording / reproducing signal processing device 5 memory 6 monitor 7 magnetic head 8a magnetic tape

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Arisaka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (1)

[Claims] 1. A first section in which a magnetic tape is divided into a plurality of areas corresponding to addresses, and a list of contents of the areas and their addresses are associated with each other.
And a second catalog table in which the contents list of the file in each area and its address are recorded in each area, and then recorded in the file. A data recording method for a magnetic tape, characterized in that predetermined data corresponding to the contents list of the file is recorded.