JPS5798109A - Magnetic disc control device - Google Patents
Magnetic disc control deviceInfo
- Publication number
- JPS5798109A JPS5798109A JP17248580A JP17248580A JPS5798109A JP S5798109 A JPS5798109 A JP S5798109A JP 17248580 A JP17248580 A JP 17248580A JP 17248580 A JP17248580 A JP 17248580A JP S5798109 A JPS5798109 A JP S5798109A
- Authority
- JP
- Japan
- Prior art keywords
- sector
- erroneous
- stored
- magnetic disc
- memory unit
- 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
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1883—Methods for assignment of alternate areas for defective areas
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE:To improve reliability, by regarding the sectors adjacent to the erroneous sector as erroneous sectors and moving all data stored therein to other sectors, when an erroneous sector is detected in a magnetic disc. CONSTITUTION:When an error is detected in the K-th sector, which is erroneous, of the N-th truck in a magnetic disc D, CPU apparatus 1 repeats reading action several times according to predetermined procedure and stores the address of the erroneous sector in a memory unit 4 when the result of the reading remains erroneous to the last. In the next, CPU1 searches the address of a sector adjascent to said sector, and it is stored in a memory unit 4. Further, an access operation and read-in operation are performed for the sector, and the data are stored in the memory unit 4. In addition, an appropriate replacing sector is selected, and the stored data is written in the replacing sector. With such a process, a device of high reliability is formed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17248580A JPS5798109A (en) | 1980-12-06 | 1980-12-06 | Magnetic disc control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17248580A JPS5798109A (en) | 1980-12-06 | 1980-12-06 | Magnetic disc control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5798109A true JPS5798109A (en) | 1982-06-18 |
Family
ID=15942856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17248580A Pending JPS5798109A (en) | 1980-12-06 | 1980-12-06 | Magnetic disc control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5798109A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62219264A (en) * | 1985-11-20 | 1987-09-26 | シーゲイト テクノロジィ インターナショナル | Mapping detouring defective sector with disc drive |
JPH02239472A (en) * | 1989-03-13 | 1990-09-21 | Nec Ibaraki Ltd | Optical disk device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5538660A (en) * | 1978-09-08 | 1980-03-18 | Nec Corp | Defective sector replacement system |
-
1980
- 1980-12-06 JP JP17248580A patent/JPS5798109A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5538660A (en) * | 1978-09-08 | 1980-03-18 | Nec Corp | Defective sector replacement system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62219264A (en) * | 1985-11-20 | 1987-09-26 | シーゲイト テクノロジィ インターナショナル | Mapping detouring defective sector with disc drive |
JPH02239472A (en) * | 1989-03-13 | 1990-09-21 | Nec Ibaraki Ltd | Optical disk device |
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