JPS6470847A - Duplicated storage system - Google Patents

Duplicated storage system

Info

Publication number
JPS6470847A
JPS6470847A JP62228192A JP22819287A JPS6470847A JP S6470847 A JPS6470847 A JP S6470847A JP 62228192 A JP62228192 A JP 62228192A JP 22819287 A JP22819287 A JP 22819287A JP S6470847 A JPS6470847 A JP S6470847A
Authority
JP
Japan
Prior art keywords
storage device
error
data
main system
duplicated
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
JP62228192A
Other languages
Japanese (ja)
Inventor
Kunihiro Ohata
Katsuichi Hirowatari
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 JP62228192A priority Critical patent/JPS6470847A/en
Publication of JPS6470847A publication Critical patent/JPS6470847A/en
Pending legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To sufficiently display the effect of a duplicated function by sending data from the other storage device without disconnecting one storage device generating an error and rereading the data to decide the error. CONSTITUTION:In a storage access control device 200, a control means 210 outputs #A main system instruction signal and a #B main system instruction signal from a main system instructing means 251 to storage devices 300A, 300B. These signals are exclusive, and when one is ON, the other is OFF. Thereby, the ON side storage device is the main system and the OFF side storage device is the slave system to execute duplicated operation. When a 2-bit error is generated in one storage device during the period of duplicated operation, the means 210 reads out data from the same address as an error generating address of the other storage device, writes the data in the same address of one storage device, and after ending the writing, reads out the data from the address. When an error is generated, the storage device is disconnected, and when there is no error, the duplicated operation is continued without disconnecting the storage device.
JP62228192A 1987-09-11 1987-09-11 Duplicated storage system Pending JPS6470847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62228192A JPS6470847A (en) 1987-09-11 1987-09-11 Duplicated storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62228192A JPS6470847A (en) 1987-09-11 1987-09-11 Duplicated storage system

Publications (1)

Publication Number Publication Date
JPS6470847A true JPS6470847A (en) 1989-03-16

Family

ID=16872649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62228192A Pending JPS6470847A (en) 1987-09-11 1987-09-11 Duplicated storage system

Country Status (1)

Country Link
JP (1) JPS6470847A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008217076A (en) * 2007-02-28 2008-09-18 Nec Corp Disk array device, disk array controller, and program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008217076A (en) * 2007-02-28 2008-09-18 Nec Corp Disk array device, disk array controller, and program

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