JPS55123749A - Double recording system of magnetic disc - Google Patents
Double recording system of magnetic discInfo
- Publication number
- JPS55123749A JPS55123749A JP2996079A JP2996079A JPS55123749A JP S55123749 A JPS55123749 A JP S55123749A JP 2996079 A JP2996079 A JP 2996079A JP 2996079 A JP2996079 A JP 2996079A JP S55123749 A JPS55123749 A JP S55123749A
- Authority
- JP
- Japan
- Prior art keywords
- data
- magnetic disc
- buffer
- recorded
- written
- 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
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE: To perform reliable recording by storing data, which is written to one magnetic disc device, into the other magnetic disc device simultaneously.
CONSTITUTION: In the system where the same data is recorded on different magnetic disc devices duplicatively, data buffer 400 records write data, and data read/write of buffer 400 is controlled by a data buffer control circuit. Here, data to be written to one magnetic disc device, for example, 1 is recorded on buffer 400 simultaneously with the write of this data to device 1, and contents of buffer 400 are written to the other device 2 also. As a result, the same data is recorded on two devices 1 and 2, so that data can be recorded to perform reliable recording even if one magnetic disc device is faulty.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2996079A JPS55123749A (en) | 1979-03-16 | 1979-03-16 | Double recording system of magnetic disc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2996079A JPS55123749A (en) | 1979-03-16 | 1979-03-16 | Double recording system of magnetic disc |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55123749A true JPS55123749A (en) | 1980-09-24 |
Family
ID=12290536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2996079A Pending JPS55123749A (en) | 1979-03-16 | 1979-03-16 | Double recording system of magnetic disc |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55123749A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57168360A (en) * | 1981-03-31 | 1982-10-16 | Fujitsu Ltd | Magnetic recording controlling system |
JPS57185555A (en) * | 1981-05-12 | 1982-11-15 | Hitachi Ltd | Magnetic disc controller |
JPS57201950A (en) * | 1981-06-05 | 1982-12-10 | Hitachi Ltd | Double recording magnetic disk system |
US4423448A (en) * | 1979-12-26 | 1983-12-27 | Burroughs Corporation | Multi-path to data facility for disk drive transducer arms |
JPS6286425A (en) * | 1985-10-11 | 1987-04-20 | Nec Corp | Magnetic disc control device |
JPH02146075U (en) * | 1989-05-15 | 1990-12-11 |
-
1979
- 1979-03-16 JP JP2996079A patent/JPS55123749A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4423448A (en) * | 1979-12-26 | 1983-12-27 | Burroughs Corporation | Multi-path to data facility for disk drive transducer arms |
JPS57168360A (en) * | 1981-03-31 | 1982-10-16 | Fujitsu Ltd | Magnetic recording controlling system |
JPH0254584B2 (en) * | 1981-03-31 | 1990-11-22 | Fujitsu Ltd | |
JPS57185555A (en) * | 1981-05-12 | 1982-11-15 | Hitachi Ltd | Magnetic disc controller |
JPH0132535B2 (en) * | 1981-05-12 | 1989-07-05 | Hitachi Ltd | |
JPS57201950A (en) * | 1981-06-05 | 1982-12-10 | Hitachi Ltd | Double recording magnetic disk system |
JPS6226482B2 (en) * | 1981-06-05 | 1987-06-09 | Hitachi Ltd | |
JPS6286425A (en) * | 1985-10-11 | 1987-04-20 | Nec Corp | Magnetic disc control device |
JPH02146075U (en) * | 1989-05-15 | 1990-12-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS55123749A (en) | Double recording system of magnetic disc | |
JPS5790770A (en) | Data backup system | |
JPS5757359A (en) | Magnetic disk device | |
JPS5534756A (en) | Double recording system of magnetic disc device | |
JPS53133415A (en) | Magnetic recording device | |
JPS6414776A (en) | Method for processing defective sector in optical data recording/reproducing device | |
JPS55163697A (en) | Memory device | |
JPS5693156A (en) | Floppy disk magazine driving device | |
JPS5499534A (en) | Magnetic disk device | |
JPS5694454A (en) | Access control system of magnetic disc device | |
JPS5430742A (en) | Memory control system | |
JPS53106110A (en) | Magnetic memory controller | |
JPS53118915A (en) | Storage reproducing system | |
JPS57131166A (en) | Partial read and record control device | |
JPS54161852A (en) | Mass memory device with high-speed memory part | |
JPS53141516A (en) | Storing system | |
JPS5374849A (en) | Checking method for writing data | |
JPS53141518A (en) | Storing system | |
JPS5589911A (en) | Recording system of digital magnetic tape | |
JPS642155A (en) | Write controlling method for external memory device | |
JPS537310A (en) | Magnetic tape control system | |
JPS5250131A (en) | Information recording system | |
JPS5698709A (en) | Magnetic disk device | |
JPS5430746A (en) | High-speed access control system to rotary memory unit | |
JPS52131709A (en) | Write/read control system for magnetic disk device |