Apparatus and method for enabling rapid searching of helically r

Details Apparatus and method for enabling rapid searching of helically r Apparatus and method for enabling rapid searching of helically r

1987-05-11

1989-07-04

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 7303, 360 744, G11B 1518, G11B 1546, G11B 1548

Patent

active

048455776

ABSTRACT:
Apparatus and method are disclosed for enabling rapid search of magnetic tape having information helically recorded thereon. A tape mark, consisting of an analog signal, is recorded on the magnetic tape as a physical location reference in a manner such that the mark can be detected at both normal playback speed and at faster search speeds. The recorded analog signal provides a highly reliable indication of record boundaries, including end of file, end of volume, end of directory, and the like.

REFERENCES:
patent: 3821710 (1974-06-01), Arciprete et al.
patent: 4175267 (1979-11-01), Tachi
patent: 4293879 (1981-10-01), Heitmann et al.
patent: 4628372 (1986-12-01), Morisawa

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