DE3854924T2 - Servomuster - Google Patents
ServomusterInfo
- Publication number
- DE3854924T2 DE3854924T2 DE3854924T DE3854924T DE3854924T2 DE 3854924 T2 DE3854924 T2 DE 3854924T2 DE 3854924 T DE3854924 T DE 3854924T DE 3854924 T DE3854924 T DE 3854924T DE 3854924 T2 DE3854924 T2 DE 3854924T2
- Authority
- DE
- Germany
- Prior art keywords
- servo
- disk
- track
- lines
- present
- 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.)
- Expired - Fee Related
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
- G11B5/58—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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting
- G11B5/5965—Embedded servo format
-
- 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
- G11B5/5534—Initialisation, calibration, e.g. cylinder "set-up"
-
- 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
- G11B5/58—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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting
- G11B5/59661—Spiral servo format
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/116,109 US5003412A (en) | 1987-10-30 | 1987-10-30 | Method and apparatus for positioning a read/write mechanism |
PCT/US1988/003837 WO1989004040A1 (en) | 1987-10-30 | 1988-10-28 | Servo pattern |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3854924D1 DE3854924D1 (de) | 1996-02-29 |
DE3854924T2 true DE3854924T2 (de) | 1996-09-05 |
Family
ID=22365276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3854924T Expired - Fee Related DE3854924T2 (de) | 1987-10-30 | 1988-10-28 | Servomuster |
Country Status (7)
Country | Link |
---|---|
US (1) | US5003412A (de) |
EP (1) | EP0393116B1 (de) |
JP (1) | JP2652895B2 (de) |
AT (1) | ATE133287T1 (de) |
AU (1) | AU2811089A (de) |
DE (1) | DE3854924T2 (de) |
WO (1) | WO1989004040A1 (de) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5055951A (en) * | 1989-03-10 | 1991-10-08 | Irwin Magnetic Systems, Inc. | Method and apparatus for servo-positioning movable transducer heads |
US5132861A (en) * | 1989-10-02 | 1992-07-21 | Behr Michael I | Systems using superimposed, orthogonal buried servo signals |
US5223994A (en) * | 1989-10-02 | 1993-06-29 | Behr Michael I | System using superimposed, orthogonal buried servo signals |
JP2635912B2 (ja) * | 1993-07-19 | 1997-07-30 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 磁気ヘッドの位置検出方法及び磁気ディスク装置 |
US5689384A (en) * | 1994-06-30 | 1997-11-18 | International Business Machines Corporation | Timing based servo system for magnetic tape systems |
US5612833A (en) * | 1994-12-02 | 1997-03-18 | International Business Machines Corporation | Radial self-propagation pattern generation for disk file servowriting |
US5680587A (en) * | 1995-05-01 | 1997-10-21 | Computer Performance Inc. | Enhanced-performance floppy diskette subsystem |
US5764018A (en) * | 1995-09-29 | 1998-06-09 | Hewlett-Packard Co. | Hysteresis removal for positioning systems with variable backlash and stiction |
US5875064A (en) * | 1996-07-09 | 1999-02-23 | International Business Machines Corporation | Method and system for accurate self-servowriting with normalization in a disk drive |
US5793554A (en) * | 1996-07-09 | 1998-08-11 | International Business Machines Corporation | Self-servowriting system with dynamic error propagation reduction |
US5930065A (en) * | 1997-05-16 | 1999-07-27 | International Business Machines Corporation | Timing based servo longitudinal addressing |
US5923272A (en) * | 1997-07-08 | 1999-07-13 | International Business Machines Corporation | Serial bitstream code for timing-based servo |
US6304398B1 (en) | 1998-09-24 | 2001-10-16 | Seagate Technology Llc | Dual modulo gray code positioning system |
US6411459B1 (en) | 1999-02-22 | 2002-06-25 | Seagate Technology Llc | Advanced servo writing method for hard disc drives |
US6542325B1 (en) * | 1999-03-10 | 2003-04-01 | Imation Corp. | Time-based servo for magnetic storage media |
US7167333B1 (en) | 2000-05-09 | 2007-01-23 | Maxtor Corporation | Method and apparatus for writing and reading servo information written in a spiral fashion |
US7133239B1 (en) | 2000-05-09 | 2006-11-07 | Maxtor Corporation | Methods and apparatuses for writing spiral servo patterns onto a disk surface |
US7139144B1 (en) | 2000-08-04 | 2006-11-21 | Maxtor Corporation | Method and apparatus for writing spiral servo information by modifying existing servo track writing equipment |
US6754022B1 (en) | 2001-07-16 | 2004-06-22 | Imation Corp. | High-speed current driver |
US6781778B1 (en) | 2001-07-16 | 2004-08-24 | Imation Corp. | Time-based sectored servo data format |
US7072133B1 (en) | 2001-10-15 | 2006-07-04 | Imation Corp. | Servo mark verify head |
US6639529B1 (en) * | 2002-05-14 | 2003-10-28 | Mitutoyo Corporation | System and method for delay calibration in position encoders |
US7623313B1 (en) | 2003-06-02 | 2009-11-24 | Maxtor Corporation | Method and apparatus for performing a self-servo write operation in a disk drive |
US7248427B1 (en) | 2003-06-02 | 2007-07-24 | Maxtor Corporagion | Method and apparatus for reducing velocity errors when writing spiral servo information onto a disk surface |
US7206170B2 (en) * | 2004-05-19 | 2007-04-17 | Imetion Corp. | Thin film servo head apparatus with canted servo gaps |
US7124654B1 (en) | 2004-09-30 | 2006-10-24 | Western Digital (Fremont), Inc. | Method for determining a microactuator range of movement |
US20070047420A1 (en) * | 2005-08-25 | 2007-03-01 | Fuji Photo Film Co., Ltd. | Optical information recording medium, optical information recording method and optical information reproducing method |
US7760465B2 (en) | 2005-10-25 | 2010-07-20 | International Business Machines Corporation | Magnetic head having selectively defined reader gap thicknesses |
US7474492B2 (en) * | 2006-05-22 | 2009-01-06 | Maxtor Corporation | Mechanical reference detection using a v-shaped pattern |
US20080144211A1 (en) * | 2006-12-18 | 2008-06-19 | Weber Mark P | Servo techniques that mitigate an effect of read and write velocity variations on position error signal calculations |
US7495859B2 (en) * | 2007-02-20 | 2009-02-24 | Imation Corp. | Interleaved servo pattern |
US7826169B2 (en) * | 2007-04-25 | 2010-11-02 | Quantum Corporation | Servo error detection and compensation utilizing virtual data tracking servo methods |
US7650686B2 (en) | 2007-12-28 | 2010-01-26 | Hitachi Global Storage Technologies Netherlands B.V. | Servo track writer clockhead radius jig |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3212074A (en) * | 1960-12-15 | 1965-10-12 | Sperry Rand Corp | Magnetic disc file positional information apparatus |
US3175205A (en) * | 1961-06-13 | 1965-03-23 | Ibm | Data tracking system |
US3426337A (en) * | 1964-12-21 | 1969-02-04 | Ibm | Positioning system for random access device |
US4007493A (en) * | 1975-05-06 | 1977-02-08 | Burroughs Corporation | Track positioning system for magnetic transducer head |
GB1474892A (en) * | 1975-06-27 | 1977-05-25 | Burroughs Corp | Method and apparatus for recording and reproducing information on a plural-track record disc |
US4157577A (en) * | 1977-11-14 | 1979-06-05 | International Business Machines Corporation | Rotatable storage apparatus with digitally responsive circuitry for track selection |
US4371960A (en) * | 1980-12-24 | 1983-02-01 | Magnetic Peripherals Inc. | Measurement of disc servo head/data head misalignment |
US4587579A (en) * | 1982-12-30 | 1986-05-06 | International Business Machines Corporation | System for position detection on a rotating disk |
US4531167A (en) * | 1983-08-25 | 1985-07-23 | Pioneer Research, Inc. | Servowriter system for magnetic disc drives |
US4700244A (en) * | 1986-02-14 | 1987-10-13 | Hewlett-Packard Company | Process and system for compensating for information shifts on disc storage media |
-
1987
- 1987-10-30 US US07/116,109 patent/US5003412A/en not_active Expired - Fee Related
-
1988
- 1988-10-28 AT AT89900444T patent/ATE133287T1/de not_active IP Right Cessation
- 1988-10-28 EP EP89900444A patent/EP0393116B1/de not_active Expired - Lifetime
- 1988-10-28 DE DE3854924T patent/DE3854924T2/de not_active Expired - Fee Related
- 1988-10-28 AU AU28110/89A patent/AU2811089A/en not_active Abandoned
- 1988-10-28 WO PCT/US1988/003837 patent/WO1989004040A1/en active IP Right Grant
- 1988-10-28 JP JP1500166A patent/JP2652895B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0393116A1 (de) | 1990-10-24 |
EP0393116B1 (de) | 1996-01-17 |
US5003412A (en) | 1991-03-26 |
AU2811089A (en) | 1989-05-23 |
DE3854924D1 (de) | 1996-02-29 |
EP0393116A4 (en) | 1991-01-30 |
ATE133287T1 (de) | 1996-02-15 |
JPH03503582A (ja) | 1991-08-08 |
JP2652895B2 (ja) | 1997-09-10 |
WO1989004040A1 (en) | 1989-05-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |