JPS6423463A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPS6423463A JPS6423463A JP18037487A JP18037487A JPS6423463A JP S6423463 A JPS6423463 A JP S6423463A JP 18037487 A JP18037487 A JP 18037487A JP 18037487 A JP18037487 A JP 18037487A JP S6423463 A JPS6423463 A JP S6423463A
- Authority
- JP
- Japan
- Prior art keywords
- mark
- sector
- servo
- data
- recording medium
- 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 obtain a positional discriminating mark from a data surface by using an illegal pattern for a sector mark and an index mark. CONSTITUTION:A servo sector 1 provided in a track on a rotational recording medium is constitutive of a gap area or a sink area 3, the sector mark or the index mark 4, a gap area 5 and servo data 6 and 7, etc. Now, the mark 4 indicates a starting position of each sector or a rotational position of the recording medium, whereas the illegal pattern is used for 2-7RLL code. By this method, the mark 4 can directly be obtained from the data surface. In addition, since the servo data can be obtained from the data surface, it is not necessary to provide a servo surface for exclusive use, thus lowering the cost of the device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18037487A JPS6423463A (en) | 1987-07-20 | 1987-07-20 | Magnetic disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18037487A JPS6423463A (en) | 1987-07-20 | 1987-07-20 | Magnetic disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6423463A true JPS6423463A (en) | 1989-01-26 |
Family
ID=16082124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18037487A Pending JPS6423463A (en) | 1987-07-20 | 1987-07-20 | Magnetic disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6423463A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01245465A (en) * | 1988-03-26 | 1989-09-29 | Hitachi Ltd | Method and circuit for generating address mark |
US5231548A (en) * | 1989-12-30 | 1993-07-27 | Sony Corporation | Rotary drum controller |
JPH0644690A (en) * | 1992-01-24 | 1994-02-18 | Fujitsu Ltd | Servo mark pattern generation and detection method |
-
1987
- 1987-07-20 JP JP18037487A patent/JPS6423463A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01245465A (en) * | 1988-03-26 | 1989-09-29 | Hitachi Ltd | Method and circuit for generating address mark |
US5231548A (en) * | 1989-12-30 | 1993-07-27 | Sony Corporation | Rotary drum controller |
JPH0644690A (en) * | 1992-01-24 | 1994-02-18 | Fujitsu Ltd | Servo mark pattern generation and detection method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0257713A3 (en) | Magnetic recording media, systems using same, apparatus for use therewith and method of positioning a read/write head adjacent a magnetic recording medium | |
EP0368269A3 (en) | Magnetic media containing reference feature and methods for referencing magnetic head position to the reference feature | |
EP0412850A3 (en) | Substrate for recording medium, recording medium, method for preparing the same, recording and reproducing device, and recording, reproducing and erasing method by use of such recording medium | |
DE69014663D1 (en) | Optical disc recording system. | |
EP0183412A3 (en) | Apparatus for recording and reproducing data on a magnetic recording medium | |
DE3782570D1 (en) | MAGNETIC DISK UNIT WITH A METAL LAYER DISK AS A DATA RECORDING MEDIUM. | |
JPS5246805A (en) | Magnetic disc device | |
EP0412829A3 (en) | Recording medium, method for preparing the same, recording and reproducing device, and recording, reproducing and erasing method by use of such a recording medium | |
DE3686913D1 (en) | DEVICE FOR RECORDING AND / OR PLAYING BACK AN INFORMATION SIGNAL. | |
EP0089816A3 (en) | Apparatus for controlling the tracking position of a head in an apparatus for recording or reproducing information | |
TW234182B (en) | ||
JPS6423463A (en) | Magnetic disk device | |
JPS5755548A (en) | Magnetic disk device | |
EP0285452A3 (en) | Magnetic disk apparatus using both servo-surface servo and data-surface servo | |
JPS5211912A (en) | Magnetic head position settlement apparatus | |
JPS6425370A (en) | System for positioning head of magnetic disk device | |
JPS523412A (en) | Reprinting method of magnetic record | |
SU657464A1 (en) | Apparatus for recording information on magnetic disks | |
JPS5376015A (en) | Magnetic head positioner | |
JPS5215307A (en) | Data reader | |
ES2048500T3 (en) | PROCEDURE AND DEVICE FOR COPYING MAGNETIC TAPES. | |
JPS55139667A (en) | Disk unit | |
JPS5255547A (en) | Optical information reader | |
JPS5230408A (en) | Magnetic disc device | |
JPS57103135A (en) | Optical disk and optical disk device |