JPS5788576A - Method and apparatus for head positioning of floppy disc - Google Patents
Method and apparatus for head positioning of floppy discInfo
- Publication number
- JPS5788576A JPS5788576A JP16281480A JP16281480A JPS5788576A JP S5788576 A JPS5788576 A JP S5788576A JP 16281480 A JP16281480 A JP 16281480A JP 16281480 A JP16281480 A JP 16281480A JP S5788576 A JPS5788576 A JP S5788576A
- Authority
- JP
- Japan
- Prior art keywords
- read
- write head
- specified
- head
- information
- 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
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
- G11B5/553—Details
- G11B5/5547—"Seek" control and circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/08—Track changing or selecting during transducing operation
- G11B21/081—Access to indexed tracks or parts of continuous track
- G11B21/083—Access to indexed tracks or parts of continuous track on discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Position Or Direction (AREA)
Abstract
PURPOSE:To automatically compensate track shift, by converting and storing the quality level of information-read to a specified pattern corresponding to the position of a read/write head and making discrimination from this pattern based on the specified criteria. CONSTITUTION:The information recording section of a floppy disc 1 is provided with 76 lines of concentric tracks T0-T76, a read/write head is slightly moved toward crossing direction of an arbitrary track, and the quality level of the information-read read in with a read/write head in the movement of minute shift is converted into a specified pattern corresponding to the position of the head and stored in the storage section, and after the end of read at a specified range, the optimum read/write head position is discriminated based on the said pattern and the specified criteria. Based on the result of discrimination, the read/write head is finally positioned to the optimum head position. Thus, the track shift is compensated automatically.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16281480A JPS5788576A (en) | 1980-11-19 | 1980-11-19 | Method and apparatus for head positioning of floppy disc |
US06/240,412 US4445153A (en) | 1980-03-07 | 1981-03-04 | Method of correcting track misalignment of floppy disc and apparatus therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16281480A JPS5788576A (en) | 1980-11-19 | 1980-11-19 | Method and apparatus for head positioning of floppy disc |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5788576A true JPS5788576A (en) | 1982-06-02 |
Family
ID=15761725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16281480A Pending JPS5788576A (en) | 1980-03-07 | 1980-11-19 | Method and apparatus for head positioning of floppy disc |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5788576A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4628380A (en) * | 1985-04-17 | 1986-12-09 | Computer Memories, Inc. | Encoder output phase selection system for magnetic disk memory |
JPH06203352A (en) * | 1992-12-28 | 1994-07-22 | Nec Corp | Magnetic disk device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54150106A (en) * | 1978-05-15 | 1979-11-26 | Ibm | Recording member |
JPS5558854A (en) * | 1978-10-27 | 1980-05-01 | Ibm | Track follow up servo system |
JPS56114178A (en) * | 1980-02-14 | 1981-09-08 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
-
1980
- 1980-11-19 JP JP16281480A patent/JPS5788576A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54150106A (en) * | 1978-05-15 | 1979-11-26 | Ibm | Recording member |
JPS5558854A (en) * | 1978-10-27 | 1980-05-01 | Ibm | Track follow up servo system |
JPS56114178A (en) * | 1980-02-14 | 1981-09-08 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4628380A (en) * | 1985-04-17 | 1986-12-09 | Computer Memories, Inc. | Encoder output phase selection system for magnetic disk memory |
JPH06203352A (en) * | 1992-12-28 | 1994-07-22 | Nec Corp | Magnetic disk device |
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