Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1995-06-01
1996-10-29
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 51, 360 7705, G11B 2719
Patent
active
055702473
ABSTRACT:
A self servo writing file and method for writing servo patterns in a direct access storage device are provided. First servo information is written on a data storage media at a first crash stop. The transducer heads are moved offset from the written servo information while reading the last written servo information until the detected servo signal equals a predetermined value. Then servo information is written on the data storage media responsive to the detected servo signal equal to the predetermined value. The moving and writing steps are sequentially repeated until a second crash stop is reached. A quad-burst servo amplitude pattern or phase pattern can be used for the servo information. The servo writing method is adapted easily for many different servo options. When the file uses a hybrid servo or sector servo, the other surfaces can be written by duplicating the servo bursts with a high bandwidth servo system of the file. Alternatively, the servo writing steps can be repeated for each of the other surfaces for providing head dependent pitch. Variable track pitch can be provided by selectively varying the predetermined value compared with the detected servo signal.
REFERENCES:
patent: 4371902 (1983-02-01), Baxter et al.
patent: 4414589 (1983-11-01), Oliver et al.
patent: 4530019 (1985-07-01), Penniman
patent: 4530020 (1985-07-01), Sutton
patent: 4531167 (1985-07-01), Berger
patent: 4912576 (1990-03-01), Janz
patent: 4945427 (1990-07-01), Cunningham
patent: 4969056 (1990-11-01), Negishi et al.
patent: 4987355 (1991-01-01), Leaper et al.
patent: 5012363 (1991-04-01), Mine et al.
patent: 5109307 (1992-04-01), Sidman
patent: 5164866 (1992-11-01), Sano et al.
patent: 5255132 (1993-10-01), Galbraith et al.
patent: 5416652 (1995-05-01), Lewis
IBM Technical Disclosure Bulletin, Bennett et al., Writing Servo Patterns In Disk Files, Aug. 1980, pp. 1234-1235.
IBM Technical Disclosure Bulletin, Elliott, Data Head Self Servowrite, Feb. 1990, pp. 20-22.
IBM Technical Disclosure Bulletin, Ono, Self-Servo Writing Method, Oct. 1990, pp. 263-265.
"Quad Burst Servo Needing No Sync ID and Having Added Information", IBM Technical Disclosure Bulletin, vol. 33, No. 3B, pp. 198-200, Aug. 1990.
Fowler, "Regenerative Clock Technique for Servo Track Writers", IBM Technical Disclosure Bulletin, vol. 33, No. 5, Oct. 1990, pp. 310-311.
Brown Dana H.
Christensen Thomas C.
Cunningham Earl A.
Rogelstad Wayne A.
Bussan Matthew J.
Habermehl James L.
International Business Machines - Corporation
Pennington Joan
Psitos Aristotelis M.
LandOfFree
Self servo writing file does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self servo writing file, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self servo writing file will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1789919