JPS56148798A - Error detection system - Google Patents

Error detection system

Info

Publication number
JPS56148798A
JPS56148798A JP5144280A JP5144280A JPS56148798A JP S56148798 A JPS56148798 A JP S56148798A JP 5144280 A JP5144280 A JP 5144280A JP 5144280 A JP5144280 A JP 5144280A JP S56148798 A JPS56148798 A JP S56148798A
Authority
JP
Japan
Prior art keywords
detected
bit
parity
error
words
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
JP5144280A
Other languages
Japanese (ja)
Inventor
Moriyuki Takamura
Yukio Nozoe
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5144280A priority Critical patent/JPS56148798A/en
Publication of JPS56148798A publication Critical patent/JPS56148798A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Detection And Correction Of Errors (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To detect and correct a one-bit error with relatively simple constitution by selecting an error bit through making a vertical parity check when a fault is detected in terms of horizontal parity. CONSTITUTION:When RAM memory 31 of 16 words by 7 bits having a parity bit at each final bit is readout and a horizontal parity error is detected by parity checker 42, 16 words are all readout via an external device and stored in data register 38. Then, a vertical parity value is generated and compared by comparing circuit 39 with the original vertical parity value stored in register 33. Thus, a faulty bit is detected by noncoincidence detected by circuit 39 is detected and reproted to the external device. Consequently, one-bit errors are detected and corrected with the relatively simple constitution.
JP5144280A 1980-04-18 1980-04-18 Error detection system Pending JPS56148798A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5144280A JPS56148798A (en) 1980-04-18 1980-04-18 Error detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5144280A JPS56148798A (en) 1980-04-18 1980-04-18 Error detection system

Publications (1)

Publication Number Publication Date
JPS56148798A true JPS56148798A (en) 1981-11-18

Family

ID=12887037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5144280A Pending JPS56148798A (en) 1980-04-18 1980-04-18 Error detection system

Country Status (1)

Country Link
JP (1) JPS56148798A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110098A (en) * 1982-12-14 1984-06-25 Seiko Instr & Electronics Ltd Error correcting device of data storage device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110098A (en) * 1982-12-14 1984-06-25 Seiko Instr & Electronics Ltd Error correcting device of data storage device

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