Method for the recording and reading of a two-layer magnetic tap

Details Method for the recording and reading of a two-layer magnetic tap Method for the recording and reading of a two-layer magnetic tap

1996-08-12

1999-02-02

Beausoliel, Jr., Robert W.

Dynamic magnetic information storage or retrieval

Head

Core

360 64, 365173, G06F 1134

Patent

active

058676392

ABSTRACT:
Data validation uses redundant storage of the data on two-layer magnetic tapes. A method and system provide data recording and reading on such magnetic tapes with a high degree of protection from errors and/or fraudulent behavior. The two-layer tape includes a first layer with a high coercive field positioned on a support and a second magnetic layer with a lower coercive field covering the first layer. Synchronous recording is done on the two layers so that all data is recorded on the second layer and some of the date is recorded on the first layer. Data on the second layer is validated upon reading by reading the data in the first layer after erasure of the second layer.

REFERENCES:
patent: 4114029 (1978-09-01), Lee
patent: 4237189 (1980-12-01), Deffeyes
patent: 5157663 (1992-10-01), Major et al.
patent: 5295258 (1994-03-01), Jewett et al.
patent: 5343422 (1994-08-01), Kung et al.

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