JPS6470847A - Duplicated storage system - Google Patents
Duplicated storage systemInfo
- 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
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.
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)
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 |
-
1987
- 1987-09-11 JP JP62228192A patent/JPS6470847A/en active Pending
Cited By (1)
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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