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JPS56153453A - Parity check system for address and data - Google Patents

Parity check system for address and data

Info

Publication number
JPS56153453A
JPS56153453A JP5680980A JP5680980A JPS56153453A JP S56153453 A JPS56153453 A JP S56153453A JP 5680980 A JP5680980 A JP 5680980A JP 5680980 A JP5680980 A JP 5680980A JP S56153453 A JPS56153453 A JP S56153453A
Authority
JP
Japan
Prior art keywords
data
address
parity check
bit
code string
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
JP5680980A
Other languages
Japanese (ja)
Inventor
Shinichi Kubota
Akira Sato
Toshihiro Miyamoto
Hisao Murataka
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 JP5680980A priority Critical patent/JPS56153453A/en
Publication of JPS56153453A publication Critical patent/JPS56153453A/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)

Abstract

PURPOSE:To extend the parity check function without increasing the capacity of the storage, by setting data and the address as one code string and by adding a parity bit to it. CONSTITUTION:Data D0-D7 and addresses A0-A15 are regarded as one code string, and a parity bit is generated and added in accordance with the total of ''1''s in this 24-bit code string. The data part and the parity bit are stored in the address of the storage device designated by the address of this code string. At the read time, error detection is performed by parity check. Thus, parity check for data and addresses is executed at a time, and the capacity of the storage device becomes small because only one bit is used as the parity bit.
JP5680980A 1980-04-28 1980-04-28 Parity check system for address and data Pending JPS56153453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5680980A JPS56153453A (en) 1980-04-28 1980-04-28 Parity check system for address and data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5680980A JPS56153453A (en) 1980-04-28 1980-04-28 Parity check system for address and data

Publications (1)

Publication Number Publication Date
JPS56153453A true JPS56153453A (en) 1981-11-27

Family

ID=13037707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5680980A Pending JPS56153453A (en) 1980-04-28 1980-04-28 Parity check system for address and data

Country Status (1)

Country Link
JP (1) JPS56153453A (en)

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