Positioning system and formatting scheme for magnetic tape media

Details Positioning system and formatting scheme for magnetic tape media Positioning system and formatting scheme for magnetic tape media

1980-05-19

1982-03-23

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Address coding

360 50, 360 722, 360 744, G11B 509, G11B 1518, G11B 1548

Patent

active

043216323

ABSTRACT:
A positioning system for a magnetic tape system that utilizes a multiple record recording format wherein positioning data that marks the beginning of record segments, the beginning of the tape medium, and the ending of the tape medium are pre-recorded at one-fourth of the bit density of work data so that positioning data may be more accurately read at a higher tape speed during a record seek mode of operation. The system also includes detector circuitry that is enabled only upon detecting positioning data and that identifies the positioning data as an inter-record mark signal, beginning of tape signal, or an ending of tape signal. A tape drive controller is responsive to the detection circuitry for controlling the speed and direction of the magnetic tape.

REFERENCES:
patent: 3387293 (1968-06-01), Stockebrand
patent: 3681524 (1972-08-01), Nicholls
patent: 3879752 (1975-04-01), Heidecker
patent: 3987484 (1976-10-01), Bosche et al.
patent: 4000518 (1976-12-01), Stearns

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