JPH02183461A - Data input/output device - Google Patents

Data input/output device

Info

Publication number
JPH02183461A
JPH02183461A JP181889A JP181889A JPH02183461A JP H02183461 A JPH02183461 A JP H02183461A JP 181889 A JP181889 A JP 181889A JP 181889 A JP181889 A JP 181889A JP H02183461 A JPH02183461 A JP H02183461A
Authority
JP
Japan
Prior art keywords
read
data
write
disk device
program
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.)
Pending
Application number
JP181889A
Other languages
Japanese (ja)
Inventor
Mitsugi Hata
畑 貢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP181889A priority Critical patent/JPH02183461A/en
Publication of JPH02183461A publication Critical patent/JPH02183461A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent the breakdown of data and the appropriation of data caused by an error of a program to some extent by providing a mechanism for inhibiting partial read and write of a disk in a disk device. CONSTITUTION:An initial value of an information holding memory 2 is set to a value for inhibiting read and write operations of all sectors in a disk device 3. Therefore, read and write requests which are not aware of this device 3 are not executed, and appropriation, etc., of the contents of a file can be prevented. Also, a program connected to a data bus 5 and an address bus 16 sets the information holding memory 2 by using a special interface to a state that only a sector part to which it executes an access is brought to read permission or write permission, or both the permissions in accordance with a purpose, by which a data breakdown in the disk device 3 caused by an unintended access due to an error of the program can be prevented, and also, an error of the program can be detected.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、データ入出力を行うために用いるデータ入出
力装置に関し、特に、読込みおよび書込み動作のアクセ
スを制御可能なデータ入出力装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data input/output device used for inputting and outputting data, and particularly to a data input/output device that can control access for read and write operations.

〔従来の技術〕[Conventional technology]

従来のデータ入出力装置においては、ディスク装置での
書込み保護としては、個々の磁気ディスクあるいはディ
スク装置全体にのみ可能であり。
In conventional data input/output devices, write protection on disk devices is possible only for individual magnetic disks or for the entire disk device.

読込み保護に対しては何ら処置がなされていなかった・ 〔発明が解決しようとする課題〕 上述した従来のデータ入出力装置においては。No action was taken against read protection. [Problem to be solved by the invention] In the conventional data input/output device described above.

書込み保護に関しては、全くしないか、ディスク装置全
体についてのみであり、ディスク装置内のディスクの部
分的な書込み保護ができず、プログラムの誤りなどによ
るプログラムの意図しないセクタへの書込みにより、デ
ィスク装置内のデータを破壊してしまう可能性がある。
As for write protection, it is either not done at all or only for the entire disk device, and it is not possible to write protect a portion of the disk in the disk device. data may be destroyed.

また、読込み保護に関しては、何ら処置されていないの
で、ディスク装置内のデータの盗用に関しては、全く無
防備である。
Further, since no measures have been taken regarding read protection, the data in the disk device is completely defenseless against theft.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のデータ入出力装置は、情報の書込みと読込みを
行うディスク装置と、各セクタへの読込みと書込み動作
の禁止および許可の情報を保持するための読み書き可能
なメモリと、そのメモリ内の情報によりセクタへの読込
みおよび書込み動作を制御する手段とを具備することを
特徴とする。
The data input/output device of the present invention includes a disk device for writing and reading information, a readable and writable memory for holding information on prohibition and permission of reading and writing operations to each sector, and information in the memory. and means for controlling read and write operations to sectors.

〔実施例〕〔Example〕

次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第1図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.

このデータ入出力装置は、従来のものと同様の動作をす
るディスク装置3と、そのディスク装置3の全セクタの
読込みおよび書込み動作を制御する情報を保持するのに
十分な容量の情報保持メモリ2と、そのメモリ2の内容
により、読込みおよび書込み要求を制御するアクセス制
御部1を具備している。
This data input/output device includes a disk device 3 that operates in the same manner as a conventional device, and an information holding memory 2 that has a capacity sufficient to hold information that controls read and write operations of all sectors of the disk device 3. and an access control unit 1 that controls read and write requests according to the contents of the memory 2.

次にこの実施例の動作について説明する。Next, the operation of this embodiment will be explained.

情報保持メモリ2の初期値(電源オン時)は、ディスク
装置3内の全セクタの読込みおよび書込み動作禁止の値
に設定される。これによりこのディスク装置を意識しな
い読込みおよび書込み要求は実行されず、ファイル内容
の盗用などを防止できる。また、データバス5.アドレ
スバス6に接続されているコンピュータ本体で実行され
ているプログラムが、自分のアクセスするセクタ部分だ
けを目的に応じ読込み許可あるいは書込み許可、あるい
はその両方を許可の状態に情報保持−メモリ2を特別な
インターフェースを用いて設定することにより、プログ
ラムの誤りなどによる意図しないアクセスによるディス
ク装置3内のデータ破壊を防止でき、かつプログラムの
誤りを発見できる。
The initial value of the information holding memory 2 (when the power is turned on) is set to a value that prohibits read and write operations for all sectors in the disk device 3. As a result, read and write requests that are not aware of this disk device are not executed, and theft of file contents can be prevented. Also, data bus 5. A program running on the computer connected to the address bus 6 stores information in the memory 2 by allowing reading or writing, or both, only for the sectors it accesses, depending on the purpose. By making settings using a suitable interface, it is possible to prevent data destruction in the disk device 3 due to unintended access due to program errors, etc., and to discover program errors.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、ディスク装置内のディス
クの部分的は読込みおよび書込みを禁止する機構を設け
ることにより、プログラムの誤りなどによる誤ったセク
タへの書込みによるデータ破壊や、データの盗用をある
程度防止できる効果を奏する。
As explained above, the present invention prevents data destruction and data theft due to writing to incorrect sectors due to program errors by providing a mechanism that prohibits reading and writing from parts of the disk in the disk device. It has the effect of preventing this to some extent.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例のブロック図である。 1・・・アクセス制御部、2・・・情報保持メモリ、3
・・・ディスク装置、4・・・データ入出力装置、5・
・・データバス、6・・・アドレスバス。
FIG. 1 is a block diagram of one embodiment of the present invention. 1... Access control unit, 2... Information holding memory, 3
... Disk device, 4... Data input/output device, 5.
...Data bus, 6...Address bus.

Claims (1)

【特許請求の範囲】[Claims] 情報の書込みと読込みを行うディスク装置と、各セクタ
への読込みと書込み動作の禁止および許可の情報を保持
するための読み書き可能なメモリと、そのメモリ内の情
報によりセクタへの読込みおよび書込み動作を制御する
手段とを具備することを特徴とするデータ入出力装置。
A disk device that writes and reads information, a readable and writable memory that holds information on prohibition and permission of read and write operations to each sector, and a read/write memory that uses the information in that memory to control read and write operations to sectors. 1. A data input/output device comprising: means for controlling.
JP181889A 1989-01-06 1989-01-06 Data input/output device Pending JPH02183461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP181889A JPH02183461A (en) 1989-01-06 1989-01-06 Data input/output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP181889A JPH02183461A (en) 1989-01-06 1989-01-06 Data input/output device

Publications (1)

Publication Number Publication Date
JPH02183461A true JPH02183461A (en) 1990-07-18

Family

ID=11512146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP181889A Pending JPH02183461A (en) 1989-01-06 1989-01-06 Data input/output device

Country Status (1)

Country Link
JP (1) JPH02183461A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0478064A (en) * 1990-07-13 1992-03-12 Teac Corp Recording medium driving device
US6317281B1 (en) 1993-06-16 2001-11-13 Hitachi, Ltd. Disk storage device having identification information for protecting stored data
KR100594129B1 (en) * 1999-04-23 2006-06-28 삼성전자주식회사 Interface device and data transmission control method in disk drive system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0478064A (en) * 1990-07-13 1992-03-12 Teac Corp Recording medium driving device
US6317281B1 (en) 1993-06-16 2001-11-13 Hitachi, Ltd. Disk storage device having identification information for protecting stored data
KR100594129B1 (en) * 1999-04-23 2006-06-28 삼성전자주식회사 Interface device and data transmission control method in disk drive system

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