JPS556623A - Doubling method for memory content of auxiliary memory unit - Google Patents
Doubling method for memory content of auxiliary memory unitInfo
- Publication number
- JPS556623A JPS556623A JP7875578A JP7875578A JPS556623A JP S556623 A JPS556623 A JP S556623A JP 7875578 A JP7875578 A JP 7875578A JP 7875578 A JP7875578 A JP 7875578A JP S556623 A JPS556623 A JP S556623A
- Authority
- JP
- Japan
- Prior art keywords
- computer
- unit
- auxiliary memory
- memory
- auxiliary
- 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
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
PURPOSE: To double the memory of an auxilialy memory unit without influencing a computer in online process by reading data from the auxiliary memory unit, which is mormally operating, by a computer in a stand-by mode when one auxiliary memory unit recovers from a fault.
CONSTITUTION: Processing computer 1 put to work is made on-line with peripheral apparatus 30 by way of two auxiliary memory units 2 and 3 and bus change-over module 5, and computer 6, on the other hand, is in a stand-by mode because of computer 1. Here, working variable data are transferred and written at every cycle from main memory 7 of computer 1 to variable data parts 8 and 9 of auxiliary memory units at the same time and working fixed data, on the other hand, are read from fixed data part 23 of unit 3 in a mormal operation state by using main memory 10 of computer 6, when unit 2, for example, recovers from a fault, and then written to fixed data part 22 of unit 2 after the recovery, so that the memories of auxiliary memory units can be doubled without influencing the computer in the on-line mode.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7875578A JPS556623A (en) | 1978-06-30 | 1978-06-30 | Doubling method for memory content of auxiliary memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7875578A JPS556623A (en) | 1978-06-30 | 1978-06-30 | Doubling method for memory content of auxiliary memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS556623A true JPS556623A (en) | 1980-01-18 |
Family
ID=13670707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7875578A Pending JPS556623A (en) | 1978-06-30 | 1978-06-30 | Doubling method for memory content of auxiliary memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS556623A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006221628A (en) * | 2005-02-09 | 2006-08-24 | Internatl Business Mach Corp <Ibm> | Method, system and product for replicating and restoring metadata |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4829619A (en) * | 1971-08-21 | 1973-04-19 | ||
JPS5125803A (en) * | 1974-08-28 | 1976-03-03 | Taisuke Kitagawa | KUKIDODAIYAFURAMUHONPU NO BARUPUSOCHI |
-
1978
- 1978-06-30 JP JP7875578A patent/JPS556623A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4829619A (en) * | 1971-08-21 | 1973-04-19 | ||
JPS5125803A (en) * | 1974-08-28 | 1976-03-03 | Taisuke Kitagawa | KUKIDODAIYAFURAMUHONPU NO BARUPUSOCHI |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006221628A (en) * | 2005-02-09 | 2006-08-24 | Internatl Business Mach Corp <Ibm> | Method, system and product for replicating and restoring metadata |
US7987158B2 (en) | 2005-02-09 | 2011-07-26 | International Business Machines Corporation | Method, system and article of manufacture for metadata replication and restoration |
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