JPS55117774A - File protection system - Google Patents
File protection systemInfo
- Publication number
- JPS55117774A JPS55117774A JP2137679A JP2137679A JPS55117774A JP S55117774 A JPS55117774 A JP S55117774A JP 2137679 A JP2137679 A JP 2137679A JP 2137679 A JP2137679 A JP 2137679A JP S55117774 A JPS55117774 A JP S55117774A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- earthquake
- signal
- magnetic
- file
- 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
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2137679A JPS55117774A (en) | 1979-02-27 | 1979-02-27 | File protection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2137679A JPS55117774A (en) | 1979-02-27 | 1979-02-27 | File protection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55117774A true JPS55117774A (en) | 1980-09-10 |
Family
ID=12053366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2137679A Pending JPS55117774A (en) | 1979-02-27 | 1979-02-27 | File protection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55117774A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS613359A (ja) * | 1984-06-15 | 1986-01-09 | Matsushita Electric Ind Co Ltd | 光学式記録再生装置 |
-
1979
- 1979-02-27 JP JP2137679A patent/JPS55117774A/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS613359A (ja) * | 1984-06-15 | 1986-01-09 | Matsushita Electric Ind Co Ltd | 光学式記録再生装置 |
JPH0565947B2 (ja) * | 1984-06-15 | 1993-09-20 | Matsushita Electric Ind Co Ltd |
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