Recording system having coinciding servo and data tracks

Details Recording system having coinciding servo and data tracks Recording system having coinciding servo and data tracks

1974-08-12

1976-05-11

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360131, G11B 2110, G11B 566

Patent

active

039567699

ABSTRACT:
Magnetic recording apparatus employing a medium characterized by having a relatively high coercivity recording layer having servo tracks recorded therein, and a second layer of lower coercivity in which data may be recorded. The servo tracks are read by a head and this signal is used to properly position the head for writing and reading of data. If the medium is a disc, e.g. the servo tracks may be either concentric circles or a single spiral concentric with the center of the disc.

REFERENCES:
patent: 3404392 (1968-10-01), Sordello
patent: 3614756 (1971-10-01), McIntosh
"Recording Servo Information Below a Data Surface in a Homogeneous Medium", Schwarz, I.B.M. Tech. Disc. Bull., Vol. 17, No. 2, July 1974, p. 536.

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