JPS57203299A - Storage device - Google Patents

Storage device

Info

Publication number
JPS57203299A
JPS57203299A JP56089002A JP8900281A JPS57203299A JP S57203299 A JPS57203299 A JP S57203299A JP 56089002 A JP56089002 A JP 56089002A JP 8900281 A JP8900281 A JP 8900281A JP S57203299 A JPS57203299 A JP S57203299A
Authority
JP
Japan
Prior art keywords
circuit
write data
writing
error
data
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.)
Granted
Application number
JP56089002A
Other languages
Japanese (ja)
Other versions
JPS6232826B2 (en
Inventor
Yoshimi Tachibana
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
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56089002A priority Critical patent/JPS57203299A/en
Publication of JPS57203299A publication Critical patent/JPS57203299A/en
Publication of JPS6232826B2 publication Critical patent/JPS6232826B2/ja
Granted 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)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To protect stored contents and reduce the generation of data deformation by providing the titled device with an error detecting circuit and, when an error is generated in a write data, inhibiting writing to a storage circuit. CONSTITUTION:At the time of writing, a write data selecting circuit 1 selects a write data from a CPU. An encoding circuit 2 generates a check bit by using the write data. In parallel with said processing, an error detecting circuit 9 performs parity check of each byte in accordance with a write data parity bit from the CPU and a write data from the circuit 1 both of which are selected by a parity selecting circuit 8 and, when an odd bit error is detected, generates an error detecting signal, which inhibits writing to a storage circuit 3. The same is applied also to partial writing. Thus, the stored contents are protected and data deformation is reduced by inhibiting the writing of error data.
JP56089002A 1981-06-10 1981-06-10 Storage device Granted JPS57203299A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56089002A JPS57203299A (en) 1981-06-10 1981-06-10 Storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56089002A JPS57203299A (en) 1981-06-10 1981-06-10 Storage device

Publications (2)

Publication Number Publication Date
JPS57203299A true JPS57203299A (en) 1982-12-13
JPS6232826B2 JPS6232826B2 (en) 1987-07-16

Family

ID=13958597

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56089002A Granted JPS57203299A (en) 1981-06-10 1981-06-10 Storage device

Country Status (1)

Country Link
JP (1) JPS57203299A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05225798A (en) * 1991-08-14 1993-09-03 Internatl Business Mach Corp <Ibm> Memory system
JPH06324951A (en) * 1991-10-31 1994-11-25 Internatl Business Mach Corp <Ibm> Computer system with error inspection / correction function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49128646A (en) * 1973-04-09 1974-12-10
JPS5118443A (en) * 1974-08-07 1976-02-14 Hitachi Ltd Deeta bitsutoeraateiseihoshiki
JPS55135396A (en) * 1979-04-05 1980-10-22 Mitsubishi Electric Corp Error correction/detection system of memory unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49128646A (en) * 1973-04-09 1974-12-10
JPS5118443A (en) * 1974-08-07 1976-02-14 Hitachi Ltd Deeta bitsutoeraateiseihoshiki
JPS55135396A (en) * 1979-04-05 1980-10-22 Mitsubishi Electric Corp Error correction/detection system of memory unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05225798A (en) * 1991-08-14 1993-09-03 Internatl Business Mach Corp <Ibm> Memory system
JPH06324951A (en) * 1991-10-31 1994-11-25 Internatl Business Mach Corp <Ibm> Computer system with error inspection / correction function

Also Published As

Publication number Publication date
JPS6232826B2 (en) 1987-07-16

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