Magnetic storage system

Details Magnetic storage system Magnetic storage system

1984-05-14

1985-12-17

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 558

Patent

active

045595704

ABSTRACT:
Disclosed is a magnetic storage system which utilizes a dual planar magnetic disk storage device in combination with a magnetic head assembly having a local tracking device for producing small correctional movements to precisely align the magnetic transducer head to provide high density recording on a magnetic disk and thereby increase the total amount of information stored on the disk. The dual planar magnetic storage disk has magnetic wall regions which are permanently magnetized with either a horizontal or vertical polarity to produce a magnetic wall on each side of the data track. The local tracking device has sensor coils for sensing the location of the magnetic transducer head and reactor coils for producing a reaction coil magnetic field which interacts with either the magnetic wall field or the magnetic head assembly to produce the correctional movements of the local tracking device.

REFERENCES:
patent: 4149198 (1979-04-01), Behr et al.
patent: 4157576 (1979-06-01), Hack et al.
patent: 4348703 (1982-09-01), Janosi
patent: 4363046 (1982-12-01), Saito
patent: 4395741 (1983-07-01), Kobayashi et al.
IBM Technical Disclosure Bulletin, vol. 25, No. 2, Jul. 1982, pp. 778-779, Re-Recordable Servo System for Multi-Track Tape, T. Schwarz.
IBM Technical Disclosure Bulletin, vol. 26, No. 4, Sep. 1983, pp. 2100-2103, DC Offset Correction with Fast Recovery Mode in Write to Read Recovery Times for Sector Servo Hard Disk Files, Gruver et al.

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