JPS6334775A - Data recording system - Google Patents

Abstract

PURPOSE:To prevent old information data from being destructed by forming an optional data recording area adjacent to an information data recording area, after the end of data reproducing/collating, recording an optional data and reproducing and collating the data to record the information data only at the time of normal recording. CONSTITUTION:The optional data recording area is formed adjacent to the information data recording area in a recording channel. In case of rewriting data, optional data generated in an optional data generating part 7 are recorded after the end of reproducing and collating of the information data prior to the recording of data in all recording channels. Then, whether optional data reproduced by an optional data collating part 8 are prescribed data or not is decided, and in case of normal recording, the information data are recorded, but when the information data are not normally recorded, the recording of the information data are inhibited. Consequently, the old data can be previously prevented from being destructed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention mainly relates to a recording method for recording data on a card-shaped recording medium.

Conventional technology Card-shaped recording media, such as magnetic cards, conventionally store data on F2F (Frequency and two
- This is an abbreviation of Fr6quency and will be referred to as F and 2F hereinafter. )
The data is encoded using the F2F code, and the data is played back and recorded by relative movement between the magnetic card and the magnetic head. When rewriting data, a new code is written across the entire area of the recording channel to maintain the continuity of the F2F code. It was used to record data. Here, the F2F method includes a data signal and a clock signal in the same channel, and if there is magnetization reversal in the center of the bit cell, which is a unit recording area, it is "1", otherwise it is "0", and at the boundary of each bit cell. Magnetization reversal always occurs, and this becomes a clock signal.

Problems to be Solved by the Invention However, in the above-mentioned recording method, when rewriting data, the magnetic head gets worn out and becomes dirty.

Even if normal recording is not possible due to adhesion of dust, etc., it cannot be determined before recording the data, so the data is recorded and the normally recorded F2F code is recorded over the entire area of the recording channel. There is a risk that the data will be destroyed and the old data will become unplayable.

In view of the above-mentioned problems, the present invention provides a data recording method that prohibits the recording of information data if the magnetic head is unable to perform normal recording, thereby at least preventing the destruction of old information data. It is.

Means for Solving the Problems In order to solve the above problems, the data recording method of the present invention provides a recording area for arbitrary data next to the recording area for information data in the recording channel, and allows the reproduction means to record the information data. After the reproduction verification is completed, arbitrary data is recorded, and when this arbitrary data is reproduced and verified by the reproduction means, information data is recorded only if the arbitrary data is normally recorded.

Operation When rewriting data with the above-described configuration, the present invention records arbitrary data after reproduction and verification of information data is completed before recording data in all areas of the recording channel, and when this arbitrary data is reproduced and verified. If the arbitrary data is recorded normally, the information data is recorded, but if the arbitrary data is not recorded normally, the recording of the information data is prohibited to at least prevent the destruction of old data. It becomes possible.

EXAMPLE Hereinafter, a data recording system according to an example of the present invention will be explained with reference to the drawings.

FIG. 1 is a plan view for explaining the operation of the system of the present invention in the case of a head moving type magnetic card. In the figure, 1 is a magnetic card, 2 is a magnetic stripe for data recording, 3 is a recording/reproducing magnetic head at the home position, and 4 is the position of the magnetic head at a return position. In the head movement method, the magnetic head starts recording and reproducing data from the home position and ends at the return position. Furthermore, when returning to the home position, it is also possible to start recording and reproducing data from the return position of the magnetic head and to end it at the home position.

FIG. 2 shows the magnetically recorded contents of the recording channel after the recording of information data is completed. 3 is the home position of the magnetic head, and 4 is the return position.

The recording data area is 11 bytes, consisting of 9 bytes of information data and 2 bytes of arbitrary data.

The information data consists of 1 byte of start code, 1 byte of stop code, and 7 bytes of data, and the start code is located at the home position side 3 of the magnetic head. Also, the content of the arbitrary data is oO.

FIG. 3 shows the magnetically recorded contents of the recording channel after recording of arbitrary data is completed. In this example, the arbitrary data is F
F, and record it in the arbitrary data recording area as shown in the figure.

FIG. 4 is a data flow diagram in an embodiment of the present invention. The solid line path indicates the data flow during recording, and the dotted line bus indicates the data flow during playback.

To explain FIG. 4, 6 is an information data processing unit that processes reproduced information data and generates new information data;
Corresponds to applicable equipment. Reference numeral 6 denotes an information data checking section that determines whether the reproduced information data is data recorded in a predetermined format.

7 is an arbitrary data generating section which generates arbitrary data FF. Reference numeral 8 denotes an arbitrary data checking section which determines whether the reproduced arbitrary data is predetermined data. Reference numeral 9 denotes a recording data reproducing section, and 10 denotes a data recording section, in which data is recorded and reproduced via a magnetic head 11 serving as a recording and reproducing means. Finally, a control unit 12 performs processing such as input/output processing of information data and arbitrary data and switching between recording and reproduction.

An example of the operation of this data recording system having the above configuration will be described with reference to the flowchart of FIG. 6 and FIGS. 2 and 3. In FIG. 6, first, it is determined whether or not a magnetic card has been inserted (step 1o1). If it has been inserted, the magnetic head is moved from the home position 3 and reproduction of information data is started (step 102). The contents of the data recorded on the magnetic card are as shown in FIG. 2, and the data is reproduced in order from the start code. At the same time, it is determined whether the reproduced data is recorded in a predetermined format or not in step 1o3.
), if it is recorded in the specified format, step 1
On the other hand, if the magnetic card is not recorded in a predetermined format, the inserted magnetic card is considered to be a fake card or a card with corrupted data, and step 111
Proceed to , and return the magnetic card. 9 in step 104
It is determined whether or not the reproduction of the byte information data has been completed. If the reproduction has been completed, the process advances to step 105, and if it has not been completed, the process returns to step 102 to continue the reproduction of the information data. In step 105, after the reproduction of the information data is finished, the magnetic head moving to the return position 4 starts recording arbitrary data FF in the arbitrary data recording area. When the recording of the arbitrary data is completed and the magnetic head reaches the return position 4, the arbitrary data is reproduced in the process of returning to the home position 3 (step 1o6).

The contents of the data recorded on the magnetic card at this time are shown in Figure 3.The contents of the arbitrary data recording area are FF.
is changing. However, since the arbitrary data is recorded from the middle of the data group represented by the F2F code, which maintains continuity, the continuity of the F2F code is lost when the arbitrary data recording starts. However, when data is reproduced from return position 4, data up to the recording start point of arbitrary data can be normally reproduced. Therefore, in step 1o7, the 2-byte arbitrary data is reproduced, and if the bit content is "1" for 8 or more consecutive bits, it is determined that the predetermined arbitrary data is recorded, and the process proceeds to step 108; If not, it is determined that normal recording is not possible, and the process proceeds to step 111, where the card is returned. In this case, the F2F code of the information data has not lost its continuity and can be used again. In step 108, the reproduced information data is processed by the applicable device to generate new information data. When the information processing is completed, the process advances to step 108 and recording of new information data is started. At this time, the magnetic head has already returned to the home position, and new information data is recorded from this position. Then, arbitrary data Oo is recorded in the arbitrary data recording area (step 11o).

When data recording is completed, the magnetic card is returned (step 111).

The above is an example of the operation of this data recording method.

As described above, according to this embodiment, an arbitrary data recording area is provided next to the information data recording area in the recording channel of the magnetic card, and the arbitrary data FF is recorded from the time when the reproduction and verification of the information data is completed. By checking the playback, it is possible to determine whether or not normal recording is possible, and if normal recording is not possible, the magnetic card can be returned without destroying the information data on the magnetic card.Moreover, this magnetic card is It is also possible to use it again. Also, first, the information data is reproduced and verified, and it is determined whether the information data is a magnetic card recorded in a predetermined format. If the information data is recorded in a predetermined format, it is determined that the card is a predetermined magnetic card. If it is a different magnetic card, it will be determined that it is another magnetic card before recording any data, and the magnetic card will be returned, and the recorded contents of the other magnetic card will be mistakenly recorded. can be prevented from being destroyed.

In addition, if it is adopted in a system that uses high coercive force cards, it can also prevent crimes using counterfeit cards with low coercive force cards.

Effects of the Invention As described above, in this data recording method, a recording area for arbitrary data is provided next to the recording area for information data in a recording channel, and after the reproduction means has finished reproducing and verifying the information data, the arbitrary data is recorded. When this arbitrary data is reproduced and verified by the reproducing means, information data is recorded only if the arbitrary data is recorded normally. Therefore, if the magnetic head is in a state where normal recording cannot be performed, information data will not be recorded. At the very least, destruction of old information data can be prevented. Furthermore, it is possible to prevent the recording contents of other magnetic cards from being destroyed by accidentally recording arbitrary data on other magnetic cards.

Fig. 2 is a plan view of the clearing device; Fig. 2 is a chart showing the magnetic recording contents of the recording channel after recording of information data;
The figure shows the magnetic recording content of the recording channel after the recording of arbitrary data is completed, Figure 4 is a data flow chart in the embodiment of the present invention, and Figure 6 is a flow chart showing the operation in the embodiment of the present invention. be.

11... Recording and reproducing means (magnetic head).

Name of agent: Patent attorney Toshio Nakao and 1 other person/-
Kiyogian Q Rokuki-no-do) 7-1 page 1, Tribute now (Shikihetsuri) Figure 4, (Figure 5)

Claims (1)

[Claims] When information data is recorded in a predetermined recording channel of a recording medium via a recording means, a recording area for arbitrary data is provided next to the recording area for information data in the recording channel, and reproduction and verification of the information data is completed by a reproduction means. After that, arbitrary data is recorded, and when this arbitrary data is reproduced and verified by a reproducing means, information data is recorded only if the arbitrary data is normally recorded.