JPS57105059A - Control system of double-structure file - Google Patents
Control system of double-structure fileInfo
- Publication number
- JPS57105059A JPS57105059A JP55182191A JP18219180A JPS57105059A JP S57105059 A JPS57105059 A JP S57105059A JP 55182191 A JP55182191 A JP 55182191A JP 18219180 A JP18219180 A JP 18219180A JP S57105059 A JPS57105059 A JP S57105059A
- Authority
- JP
- Japan
- Prior art keywords
- file
- files
- file device
- double
- copied
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
PURPOSE:To utilize effectively the volume capacity to control a double-structure file, by keeping wait the request given from an application program to an area in a copy until the copying is over in case when a fault arises and the contents of a file device in the normal system is copied with another file device. CONSTITUTION:System files SF0 and SF1 plus a stand-by file SB0 to a file SF0 are connected to a CPU via a bus changeover switch CBBR. In addition, retransmission files RF0-RF2, a file SF1 and stand-by files SB1-SB4 to the files RF0-RF2 are connected to the CPU respectively. Then the whole or a part of the contents of a file device of the normal system is copied with the whole or a part of another file device in order to recover a faulty file device. In this case, the execution is kept for a write access request given from an applied program to an area in the copy until the copying is over. In such way, the volume capacity can be effectively utilized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55182191A JPS6059612B2 (en) | 1980-12-22 | 1980-12-22 | Duplicated file management method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55182191A JPS6059612B2 (en) | 1980-12-22 | 1980-12-22 | Duplicated file management method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57105059A true JPS57105059A (en) | 1982-06-30 |
JPS6059612B2 JPS6059612B2 (en) | 1985-12-26 |
Family
ID=16113922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55182191A Expired JPS6059612B2 (en) | 1980-12-22 | 1980-12-22 | Duplicated file management method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6059612B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59177666A (en) * | 1983-03-28 | 1984-10-08 | Toshiba Corp | Dual bulk controller |
JPH02300830A (en) * | 1989-05-15 | 1990-12-13 | Nec Corp | Multiplexing filing device |
-
1980
- 1980-12-22 JP JP55182191A patent/JPS6059612B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59177666A (en) * | 1983-03-28 | 1984-10-08 | Toshiba Corp | Dual bulk controller |
JPH0474739B2 (en) * | 1983-03-28 | 1992-11-27 | ||
JPH02300830A (en) * | 1989-05-15 | 1990-12-13 | Nec Corp | Multiplexing filing device |
Also Published As
Publication number | Publication date |
---|---|
JPS6059612B2 (en) | 1985-12-26 |
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