JPS5723162A - Magnetic disk controller - Google Patents
Magnetic disk controllerInfo
- Publication number
- JPS5723162A JPS5723162A JP9784680A JP9784680A JPS5723162A JP S5723162 A JPS5723162 A JP S5723162A JP 9784680 A JP9784680 A JP 9784680A JP 9784680 A JP9784680 A JP 9784680A JP S5723162 A JPS5723162 A JP S5723162A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- contents
- controller
- magnetic disk
- buffer
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
Abstract
PURPOSE:To evade the erasure of the contents of a buffer storing circuit due to a break of power supply by providing a magnetic disk controller with the buffer storing circuit for a magnetic disk storage divice and also by providing a nonvolatile storing circut for reservation. CONSTITUTION:While a power source is operating normally, a controller 10 sends the contents of a buffer storing circuit 11, when request data is in the circuit 11, in response to a read request from a channel device 40 or rewrites data to be rewritten, when it is in the circuit 11, in response to a write request. Once the power source 30 is turned off, a power-break detecting circuit 13 detects that and the controller 10 writes the contents of the buffer storage device 11 in a nonvolatile circuit 12. When the power source 30 is turned on, the controller 10 writes the contents of the storing circuit 12 in the buffer storing circuit 11 to restore the contents of the circuit 11.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9784680A JPS5723162A (en) | 1980-07-17 | 1980-07-17 | Magnetic disk controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9784680A JPS5723162A (en) | 1980-07-17 | 1980-07-17 | Magnetic disk controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5723162A true JPS5723162A (en) | 1982-02-06 |
Family
ID=14203086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9784680A Pending JPS5723162A (en) | 1980-07-17 | 1980-07-17 | Magnetic disk controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5723162A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2548424A1 (en) * | 1983-06-30 | 1985-01-04 | Staar Sa | MEMORY DEVICE FOR RECORDING MACHINES, ESPECIALLY OPTICAL READING |
NL8402018A (en) * | 1983-06-30 | 1985-01-16 | Staar Sa | POSITION MEMORY FOR A LASER DISPLAY. |
JPS6113328A (en) * | 1984-06-28 | 1986-01-21 | Fujitsu Ltd | Accessing system of data file |
JPS61210453A (en) * | 1985-03-15 | 1986-09-18 | Canon Inc | Data memory device |
JPH0423119A (en) * | 1990-05-18 | 1992-01-27 | Fujitsu Ltd | Method and device for restoration of data on array disk |
JPH05204502A (en) * | 1991-10-18 | 1993-08-13 | Opti Inc | Electric power management sequencer |
-
1980
- 1980-07-17 JP JP9784680A patent/JPS5723162A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2548424A1 (en) * | 1983-06-30 | 1985-01-04 | Staar Sa | MEMORY DEVICE FOR RECORDING MACHINES, ESPECIALLY OPTICAL READING |
NL8402018A (en) * | 1983-06-30 | 1985-01-16 | Staar Sa | POSITION MEMORY FOR A LASER DISPLAY. |
JPS6113328A (en) * | 1984-06-28 | 1986-01-21 | Fujitsu Ltd | Accessing system of data file |
JPH053611B2 (en) * | 1984-06-28 | 1993-01-18 | Fujitsu Ltd | |
JPS61210453A (en) * | 1985-03-15 | 1986-09-18 | Canon Inc | Data memory device |
JPH0423119A (en) * | 1990-05-18 | 1992-01-27 | Fujitsu Ltd | Method and device for restoration of data on array disk |
JPH05204502A (en) * | 1991-10-18 | 1993-08-13 | Opti Inc | Electric power management sequencer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57155696A (en) | Data processor for automobile | |
JPS5723162A (en) | Magnetic disk controller | |
DE3166554D1 (en) | A memory refreshing arrangement | |
JPS5730170A (en) | Buffer memory control system | |
JPS55123749A (en) | Double recording system of magnetic disc | |
JPS6460896A (en) | System for controlling rewrite of data of non-volatile memory device | |
JPS57182865A (en) | Microprocessor | |
JPS6466727A (en) | Disk access control system | |
JPS5365629A (en) | Memory system | |
DE69324461D1 (en) | Tape cassette with storage unit for storing playback control commands | |
EP0334523A3 (en) | Microprocessor | |
JPS642155A (en) | Write controlling method for external memory device | |
JPS5757354A (en) | Cut-off controller for internal memory | |
JPS6418802A (en) | Automatic power supply control system | |
JPS57189229A (en) | Recording and controlling system for career information | |
JPS5792476A (en) | Cash memory controller | |
JPS55153028A (en) | Data channel unit | |
JPS5729164A (en) | Computer system | |
JPS6449148A (en) | Magnetic recording and reproducing device | |
EP0333613A3 (en) | Control store address stop | |
JPS56148780A (en) | Buffer storage device | |
JPS5364431A (en) | Buffer memory control device | |
JPS6426927A (en) | External storage device | |
JPS6428755A (en) | Data block updating system | |
JPS5532265A (en) | Countermeasure method for power failure of magnetic tape unit |