Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1991-07-30
1994-02-15
Pascal, Robert J.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 77B, 360 67, 360 75, 360 7712, G11B 2736
Patent
active
052872254
ABSTRACT:
A method of, and an apparatus for, positioning a record/playback head assembly in a transverse reference position on one edge of a multitrack magnetic tape having no track identification data or other positioning patterns prerecorded thereon. A stream of transverse head positioning data, typically representative of serial numbers 1-255, is first written by the record/playback head assembly longitudinally on the tap in a selected transverse position intermediate the opposite edges of the tape. The data are subsequently read and checked for errors. If the thus detected errors are less than a predetermined number, the record/playback head assembly is moved a unit distance toward one tape edge. A similar cycle of operations is repeated until errors are found in the read stream of transverse head positioning data to the predetermined number or more.
REFERENCES:
patent: 4318142 (1982-03-01), Ravizza
patent: 4422111 (1983-12-01), Moeller et al.
patent: 4455582 (1984-06-01), Yanagida et al.
patent: 4796125 (1989-01-01), Karsh
Pascal Robert J.
Philogene Haissa
Teac Corporation
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