JPS55115121A - Input and output control unit possible for duplicated recording - Google Patents

Input and output control unit possible for duplicated recording

Info

Publication number
JPS55115121A
JPS55115121A JP2188779A JP2188779A JPS55115121A JP S55115121 A JPS55115121 A JP S55115121A JP 2188779 A JP2188779 A JP 2188779A JP 2188779 A JP2188779 A JP 2188779A JP S55115121 A JPS55115121 A JP S55115121A
Authority
JP
Japan
Prior art keywords
input
write
data
control unit
finished
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
JP2188779A
Other languages
Japanese (ja)
Other versions
JPS627572B2 (en
Inventor
Masanori Mizuta
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 JP2188779A priority Critical patent/JPS55115121A/en
Publication of JPS55115121A publication Critical patent/JPS55115121A/en
Publication of JPS627572B2 publication Critical patent/JPS627572B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To increase the reliability of system, by recordng the same information duplicatedly on two sets of input and output units without lowering the efficiency of processing of software remarkably.
CONSTITUTION: In storing the data from CPU2 duplicatedly on the input and output units 4 and 5, the write-in control section 5 writes in the data to the unit 4. Further, the readout control section 6 reads out the data written in at the end of write-in. Further, when the write-in to the buffer 7 is finished with the write-in control section, the content of the buffer 7 is read out and it is written in the input and output control unit 9. In this case, the write-in to the unit 4 can be regarded finished when the data write-in of data of the buffer 7 is finished. Thus, without remarkable lowering of the processing efficiency of software, the reliability of system can be increased through the duplicated recording of the same information to two sets of input and output units 4 and 9.
COPYRIGHT: (C)1980,JPO&Japio
JP2188779A 1979-02-28 1979-02-28 Input and output control unit possible for duplicated recording Granted JPS55115121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2188779A JPS55115121A (en) 1979-02-28 1979-02-28 Input and output control unit possible for duplicated recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2188779A JPS55115121A (en) 1979-02-28 1979-02-28 Input and output control unit possible for duplicated recording

Publications (2)

Publication Number Publication Date
JPS55115121A true JPS55115121A (en) 1980-09-04
JPS627572B2 JPS627572B2 (en) 1987-02-18

Family

ID=12067610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2188779A Granted JPS55115121A (en) 1979-02-28 1979-02-28 Input and output control unit possible for duplicated recording

Country Status (1)

Country Link
JP (1) JPS55115121A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59177666A (en) * 1983-03-28 1984-10-08 Toshiba Corp Dual bulk controller
US4819154A (en) * 1982-12-09 1989-04-04 Sequoia Systems, Inc. Memory back up system with one cache memory and two physically separated main memories
US4823261A (en) * 1986-11-24 1989-04-18 International Business Machines Corp. Multiprocessor system for updating status information through flip-flopping read version and write version of checkpoint data
US5051887A (en) * 1987-08-25 1991-09-24 International Business Machines Corporation Maintaining duplex-paired storage devices during gap processing using of a dual copy function
US5737514A (en) * 1995-11-29 1998-04-07 Texas Micro, Inc. Remote checkpoint memory system and protocol for fault-tolerant computer system
US5745672A (en) * 1995-11-29 1998-04-28 Texas Micro, Inc. Main memory system and checkpointing protocol for a fault-tolerant computer system using a read buffer
US5751939A (en) * 1995-11-29 1998-05-12 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system using an exclusive-or memory
US5787243A (en) * 1994-06-10 1998-07-28 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system
US5864657A (en) * 1995-11-29 1999-01-26 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system
WO2000017741A1 (en) * 1998-09-18 2000-03-30 Fujitsu Limited Method of remote transfer between file units
JP2001195202A (en) * 2000-01-14 2001-07-19 Nec Corp Duplex storage device and duplex storage method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944063A (en) * 1972-09-04 1974-04-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944063A (en) * 1972-09-04 1974-04-25

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819154A (en) * 1982-12-09 1989-04-04 Sequoia Systems, Inc. Memory back up system with one cache memory and two physically separated main memories
JPS59177666A (en) * 1983-03-28 1984-10-08 Toshiba Corp Dual bulk controller
JPH0474739B2 (en) * 1983-03-28 1992-11-27
US4823261A (en) * 1986-11-24 1989-04-18 International Business Machines Corp. Multiprocessor system for updating status information through flip-flopping read version and write version of checkpoint data
US5051887A (en) * 1987-08-25 1991-09-24 International Business Machines Corporation Maintaining duplex-paired storage devices during gap processing using of a dual copy function
US5787243A (en) * 1994-06-10 1998-07-28 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system
US5737514A (en) * 1995-11-29 1998-04-07 Texas Micro, Inc. Remote checkpoint memory system and protocol for fault-tolerant computer system
US5745672A (en) * 1995-11-29 1998-04-28 Texas Micro, Inc. Main memory system and checkpointing protocol for a fault-tolerant computer system using a read buffer
US5751939A (en) * 1995-11-29 1998-05-12 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system using an exclusive-or memory
US5864657A (en) * 1995-11-29 1999-01-26 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system
WO2000017741A1 (en) * 1998-09-18 2000-03-30 Fujitsu Limited Method of remote transfer between file units
JP2001195202A (en) * 2000-01-14 2001-07-19 Nec Corp Duplex storage device and duplex storage method

Also Published As

Publication number Publication date
JPS627572B2 (en) 1987-02-18

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