Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1996-08-26
1999-05-25
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 51, G11B 5596
Patent
active
059074485
ABSTRACT:
A magnetic disk drive device that includes a disk-shaped medium with a magnetic film formed on a surface for recording or reproducing information, and a magnetic head for recording on and reproducing information from the disk-shaped medium. The disk-shaped medium has a data recording region and a control signal recording region. The data recording region is impressed to have convex recording regions for recording data and concave guard bands for separating adjacent recording regions. The control signal recording region has impressed concavities and convexities representing tracking marks (for effecting tracking control of the magnetic head), track number indicating marks and track numbers (for identifying the tracks), and clock marks dividing one circumference into equal intervals along a path of angular movement of the magnetic head. The disk-shaped medium has reduced track pitch and increased recording capacity because the concave guard bands can be very narrow without inducing crosstalk, and the tracking marks, track number indicating marks, and clock marks are impressed as concavities and convexities along the path of angular movement of the magnetic head.
REFERENCES:
patent: 4764914 (1988-08-01), Estes et al.
patent: 5257149 (1993-10-01), Meyer
patent: 5296995 (1994-03-01), Yonezawa et al.
patent: 5297131 (1994-03-01), Tanaka
patent: 5341249 (1994-08-01), Abbott et al.
IBM Technical Disclosure Bulletin, vol. 36, No. 2, Feb. 1993, New York, USA, pp. 57-60, Anonymous:m "Servo Scheme Using Capacitive Sensing of Laser Ablated Marks on Magnetic Recording Disks.".
Database WPI, Section EI, Week 8245, Derwent Publications Ltd., London, Great Britain, Class TO3, AN 82-P6310E & EP-A-0 063 935 (Iomega Corp), Nov. 3, 1982.
Database EPI, Section EI, Week 9114, Derwent Publications Ltd., London, Great Britain, Class T03, AN 91-096044 & EP-A-0 420 660 (Sony Corp), Apr. 3, 1991.
IBM Technical Disclosure Bulletin, vol. 36, No. 2, Feb. 1993, New York, USA, pp. 37-38, Anonymous: "Sector Servo Using Patterned Magnetic Media Blocks Written with Magnetic Transitions."
Database WPI, Section EI, Week 8721, Derwent Publications Ltd., London, Great Britain, Class T03, AN 87-116006 & WO-A-87 03130 (Xebec Dev Part Ltd), May 21, 1987.
Database WPI, Section EI, Week 8226, Derwent 8226, Derwent Publications Ltd., London, Great Britain, Class T03, AN 82-H6323E & EP-A-0 054 438 (Matsushita Elec Ind Co Ltd), Jun. 23, 1982.
Database WPI, Section EI, Week 8944, Derwent Publications Ltd., London, Great Britain, Class T03, AN 89-317693 & EP-A-0 339 851 (Int Business Machines Corp), Nov. 2, 1989.
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Jul. 1993, Japan, vol. 376-A, No. 7, ISSN 0916-8908, pp. 1161-1163, Ishida et al.: "Discrete-track Magnetic Disk Using Embossed Substrate."
1993 IEEE International Magnetics Conference (Intermag '93), Stockholm Sweden, Apr. 13-16 1993, vol. 29, No. 6, pt. 2, ISSN 0018-9464, IEEE Transactions on Magnetics, Nov. 1993, USA, pp. 4030-4032, Watanabe et al.: "Demonstration of Track Following Technique Based on Discrete Track Media. "
IEICE Transactions of Fundamentals of Electronics, Communications and Computer Sciences, Jul. 1993, Japan, pp. 1164-1166, H. Yada et al.: "External Clocking PRML Magnetic Recording Channel for Discrete Track Media."
Hayashi Nobuhiro
Ishida Takehisa
Ishioka Hideaki
Kawazoe Kazushige
Morita Osamu
Oh Seong-Kun
Sniezek Andrew L.
Sony Corporation
LandOfFree
Magnetic disk device and method of manufacturing same having con does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic disk device and method of manufacturing same having con, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic disk device and method of manufacturing same having con will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-404750