JPH0454412B2 - - Google Patents
Info
- Publication number
- JPH0454412B2 JPH0454412B2 JP56023809A JP2380981A JPH0454412B2 JP H0454412 B2 JPH0454412 B2 JP H0454412B2 JP 56023809 A JP56023809 A JP 56023809A JP 2380981 A JP2380981 A JP 2380981A JP H0454412 B2 JPH0454412 B2 JP H0454412B2
- Authority
- JP
- Japan
- Prior art keywords
- serial number
- data
- sector
- input
- serial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Description
【発明の詳細な説明】
本発明はフロツピイデイスク等の媒体のデータ
転送装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transfer device for media such as floppy disks.
データ転送システムにおいて、一方の端末から
フロツピイデイスク等の媒体のデータをデータ転
送装置から他の装置へ送出する際、媒体や読取ヘ
ツド等の障害発生により、データを読取れない場
合読取りミスとなる。このような場合、従来は送
信を即時停止し、再度送信し直すか、又は他の媒
体にデータを作り直し、新たな媒体からデータを
読取つて再送信する必要があつた。フロツピイデ
イスクにデータを記録する形式には、例えば１ト
ラツクを複数のセクタに分け、この１セクタを通
番部とデータ部とで構成せしめる形式がある。こ
のような形式でフロツピイデイスクにデータをセ
クタ毎に書込む毎に該セクタに通番を付加し、書
込んだデータとその通番とをプリンタに打出して
控えデータをとつておく。然るのち、フロツピイ
デイスクのデータを読取つてデータを転送する
際、データはセクタ毎に通番と共に読出されるの
で、該通番を監視しておれば、データ読取りミス
が発生したとき、通番が欠けたセクタのデータは
伝送できなかつたことが明らかとなる。本発明
は、通番部とデータ部とよりなるセクタが伝送出
来なかつた場合伝送出来なくなつたセクタの通番
を自動的に検出できるようにし、オペレータはこ
れにもとずきデータ読取不良のセクタを知り、控
えデータによつて新たな媒体に欠けた部分のセク
タを入力して再送出来るようにすることを目的と
する。 In a data transfer system, when data on a medium such as a floppy disk is sent from one terminal to another device, if the data cannot be read due to a failure in the medium or reading head, it is considered a read error. Become. In such a case, conventionally, it was necessary to immediately stop the transmission and retransmit it again, or to recreate the data on another medium, read the data from the new medium, and retransmit it. As a format for recording data on a floppy disk, for example, one track is divided into a plurality of sectors, and each sector is made up of a number section and a data section. Each time data is written sector by sector on a floppy disk in this format, a serial number is added to the sector, and the written data and its serial number are printed on a printer to keep a copy. After that, when reading data from the floppy disk and transferring the data, the data is read out along with a serial number for each sector, so if you monitor the serial number, you can easily check the serial number when a data reading error occurs. It becomes clear that the data in the missing sector could not be transmitted. According to the present invention, when a sector consisting of a serial number part and a data part cannot be transmitted, the serial number of the sector that cannot be transmitted can be automatically detected. The purpose of this invention is to input the missing sector onto a new medium using backup data and retransmit it.
上記目的は本発明により、それぞれ通番部とデ
ータ部とよりなる複数のセクタを有する記録媒体
からセクタ単位で読取られた通番とデータがデー
タ転送装置より他の装置に転送される構成におい
て、データ転送装置には通番演算部、記憶部及び
通番表示部を備え、他の装置への送出のため記録
媒体より読取られたセクタでの通番は同時に通番
演算部の１入力部及び記憶部に与えられ、また記
憶部の出力は演算部の他入力に与えられ、両入力
の差を演算する通番演算部は、その時読取られ入
力された通番と、記憶部より入力された通番と、
両通番の差とを通番表示部に出力し、両通番の差
が所定値を越えた場合の出力が、記録媒体での読
取不良のあつたセクタの通番を表示しうるように
することを特徴とするデータ転送装置によつて達
成される。 The above object is achieved by the present invention, in which a serial number and data read sector by sector from a recording medium having a plurality of sectors each consisting of a serial number part and a data part are transferred from a data transfer device to another device. The device includes a serial number calculation section, a storage section, and a serial number display section, and the serial number of a sector read from the recording medium for transmission to another device is simultaneously given to one input section of the serial number calculation section and the storage section, In addition, the output of the storage section is given to the other input of the calculation section, and the serial number calculation section that calculates the difference between both inputs calculates the serial number read and input at that time, the serial number input from the storage section,
The difference between the two serial numbers is output to the serial number display section, and when the difference between the two serial numbers exceeds a predetermined value, the output can display the serial number of the sector in which the reading failure occurred on the recording medium. This is achieved by a data transfer device.
以下、本発明を図面によつて説明する。第１図
は本発明の一実施例としてのデータ転送装置を説
明するブロツク図、第２図は本発明の一実施例を
説明するデータ構成図であり、１はプロツピイデ
イスク、２は制御部、３は通番演算部、４は通番
表示部としてのプリンタ、５は記憶部、６は伝送
制御部、７は通信回線、Ao-1，Ao，Ao+1は通番、
Do-1，Do，Do+1はデータ、So-1，So，So+1はセク
タ番号、ａは通番部、ｂはデータ部である。第１
図におけるフロツピイデイスク１には第２図に示
す形式でデータが格納されている。第２図に示す
ように、セクタSo-1，So及びSo+1は通番部ａとデ
ータ部ｂとで構成され、データ部ｂにデータ
Do-1，Do，Do+1が記録される毎に通番部ａに通
番Ao-1，Ao，Ao+1が書込まれる。このフロツピ
イデイスク１のデータを控えのデータ（ハードコ
ピイ）として予め確保しておく。第１図におい
て、フロツピイデイスク１からセクタ単位で読取
られた通番Ao-1とデータDo-1とは、制御部２を
経て伝送制御部６から通信回線７へと送出され
る。このとき、通番Ao-1は通番演算部３に入力
されると共に記憶部５に書込まれる。引き続いて
フロツピイデイスク１から通番AoとデータDoが
読取られるとAo-1の場合と同様に通番Aoは通番
演算部３に入力され、また記憶部５に書込まれ、
かつ記憶部からはAo-1が通番演算部に入力され
る。通番演算部ではAoとAo-1の差としての所定
値１が演算される。 Hereinafter, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram illustrating a data transfer device as an embodiment of the present invention, and FIG. 2 is a data configuration diagram illustrating an embodiment of the present invention. 3 is a serial number calculation unit, 4 is a printer as a serial number display unit, 5 is a storage unit, 6 is a transmission control unit, 7 is a communication line, A o-1 , A o , A o+1 are serial numbers,
D o-1 , D o , D o+1 are data, S o-1 , S o , S o+1 are sector numbers, a is a serial number part, and b is a data part. 1st
The floppy disk 1 shown in the figure stores data in the format shown in FIG. As shown in Figure 2, sectors S o-1 , S o , and S o+1 are composed of a serial number part a and a data part b, and the data part b contains data.
Each time D o-1 , D o , and D o+1 are recorded, serial numbers A o-1 , A o , and A o+1 are written in the serial number section a. The data on this floppy disk 1 is secured in advance as backup data (hard copy). In FIG. 1, the serial number A o-1 and data D o-1 read sector by sector from the floppy disk 1 are sent from the transmission control unit 6 to the communication line 7 via the control unit 2. At this time, the serial number A o-1 is input to the serial number calculation section 3 and written to the storage section 5. Subsequently, when the serial number A o and data D o are read from the floppy disk 1, the serial number A o is input to the serial number calculation unit 3 and written to the storage unit 5, as in the case of A o- 1.
Furthermore, A o-1 is input from the storage section to the serial number calculation section. The serial number calculation unit calculates a predetermined value 1 as the difference between A o and A o-1 .
しかし通番AoとデータDoとは媒体の部分欠損
などにより、所定回数の繰返し読取りを行つても
読取り不能になつたりする。しかし次の通番
Ao+1とデータDo+1とは正常に読取られ、制御部
２、伝送制御部６を経て通信回線７へ送出され、
その通番Ao+1は通番演算部３に入力されると共
に記憶部５に書込まれる。通番演算部３は記憶部
５より前回読取られた通番Ao-1を取出し、新た
に読取られた通番Ao+1との演算を行い、その差
のデータ（すなわち通番Ao）を通番表示部とし
てのプリンタ４に出力せしめる。このプリンタで
は通番演算部に直接入力される通番と、記憶部よ
り入力される通番と、演算結果とが印字されるの
で、演算結果が所定値を越えていれば、伝送され
なかつたセクタの発生を検知することが出来る。
即ちオペレータはプリンタ４から出力されたデー
タにより通番Aoが伝送されなかつたことを知り、
前記控えのデータ（ハードコピイ）に基づいて、
新たな媒体（フロツピイデイスク）に通番Aoの
データを作成し、これを後送する。 However, the serial number A o and the data D o may become unreadable even after repeated reading a predetermined number of times due to partial loss of the medium or the like. But the next serial number
A o+1 and data D o+1 are read normally and sent to the communication line 7 via the control unit 2 and transmission control unit 6.
The serial number A o+1 is input to the serial number calculation unit 3 and written to the storage unit 5. The serial number calculation unit 3 retrieves the previously read serial number A o-1 from the storage unit 5, performs calculations with the newly read serial number A o+1 , and displays the difference data (that is, the serial number A o ) as a serial number. The printer 4 as a copy outputs the data. This printer prints out the serial number input directly to the serial number calculation unit, the serial number input from the storage unit, and the calculation result, so if the calculation result exceeds a predetermined value, untransmitted sectors will be generated. can be detected.
In other words, the operator knows from the data output from the printer 4 that the serial number Ao was not transmitted.
Based on the above-mentioned copy data (hard copy),
Create data with serial number A o on a new medium (floppy disk) and send it later.
以上の実施例では通番（論理的に記録されたも
の）により説明したが、通番に対応して物理位置
を示すセクタ番号So-1，So，So+1…のテーブルを
設けておきセクタ番号を出力し、しかもその場合
セクタのデータと同時にセクタ番号も読取不良と
なる如き構成の場合も同様な結果を得ることがで
きる。この場合本発明の通番はセクタ番号を示す
ものであることは言うまでもない。 Although the above embodiment has been explained using serial numbers (logically recorded), a table of sector numbers S o-1 , S o , S o+1 , etc. indicating physical positions corresponding to the serial numbers is provided. A similar result can be obtained even in the case of a configuration in which a sector number is output, and in that case, the sector number is read incorrectly at the same time as the sector data. In this case, it goes without saying that the serial number of the present invention indicates a sector number.
以上のように本発明は、伝送中に読取りミスが
発生しても、すべてのデータの再送信を必要とせ
ず読取ミスを生じた部分のデータのみを後送すれ
ばよいので、伝送効率を著しく向上しうる利点を
有するものである。 As described above, in the present invention, even if a reading error occurs during transmission, it is not necessary to retransmit all the data, but only the data in the part where the reading error occurred can be sent later, which significantly improves transmission efficiency. It has advantages that can be improved.
尚実施例においては通信回線を介してデータ転
送を行なつているがこれに限られるものではな
い。 In the embodiment, data is transferred via a communication line, but the present invention is not limited to this.
第１図は本発明の一実施例を説明するブロツク
図、第２図は本発明の一実施例を説明するデータ
構成図であり、図中に用いた符号は次の通りであ
る。
１はフロツピイデイスク、２は制御部、３は通
番演算部、４は通番表示部としてのプリンタ、５
は記憶部、６は伝送制御部、７は通信回線、
Ao-1，Ao，Ao+1は通番、Do-1，Do，Do+1はデー
タ、So-1，So，So+1はセクタ番号、ａは通番部、
ｂはデータ部を示す。
FIG. 1 is a block diagram for explaining one embodiment of the present invention, and FIG. 2 is a data configuration diagram for explaining one embodiment of the present invention. Reference symbols used in the figures are as follows. 1 is a floppy disk, 2 is a control unit, 3 is a serial number calculation unit, 4 is a printer as a serial number display unit, 5
is a storage unit, 6 is a transmission control unit, 7 is a communication line,
A o-1 , A o , A o+1 are serial numbers, D o-1 , D o , D o+1 are data, S o-1 , S o , S o+1 are sector numbers, and a is the serial number part. ,
b indicates the data section.
Claims (1)
セクタを有する記録媒体からセクタ単位で読取ら
れた通番とデータがデータ転送装置より他の装置
に転送される構成において、データ転送装置には
通番演算部、記憶部及び通番表示部を備え、他の
装置への送出のため記録媒体より読取られたセク
タでの通番は同時に通番演算部の１入力及び記憶
部に与えられ、また記憶部の出力は演算部の他入
力に与えられ、両入力の差を演算する通番演算部
は、その時読取られ入力された通番と、記憶部よ
り入力された通番と、両通番の差とを通番表示部
に出力し、両通番の差が所定値を越えた場合の出
力が、記録媒体での読取不良のあつたセクタの通
番を表示しうるようにすることを特徴とするデー
タ転送装置。1. In a configuration in which serial numbers and data read sector by sector from a recording medium having a plurality of sectors each consisting of a serial number part and a data part are transferred from a data transfer device to another device, the data transfer device includes a serial number calculation unit. , a storage unit and a serial number display unit, the serial number of a sector read from the recording medium for sending to another device is simultaneously given to one input of the serial number calculation unit and the storage unit, and the output of the storage unit is The serial number calculation part that is given to the other input of the part and calculates the difference between both inputs outputs the serial number read and input at that time, the serial number input from the storage part, and the difference between the two serial numbers to the number display part. . A data transfer device characterized in that the output when the difference between both serial numbers exceeds a predetermined value can display the serial number of a sector in which a reading failure occurred on a recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56023809A JPS57138236A (en) | 1981-02-20 | 1981-02-20 | Data transfer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56023809A JPS57138236A (en) | 1981-02-20 | 1981-02-20 | Data transfer system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57138236A JPS57138236A (en) | 1982-08-26 |
| JPH0454412B2 true JPH0454412B2 (en) | 1992-08-31 |
Family
ID=12120653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56023809A Granted JPS57138236A (en) | 1981-02-20 | 1981-02-20 | Data transfer system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57138236A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS545312A (en) * | 1977-06-14 | 1979-01-16 | Hitachi Ltd | Pick up method of sequential number information and its pick up circuit |
-
1981
- 1981-02-20 JP JP56023809A patent/JPS57138236A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57138236A (en) | 1982-08-26 |
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