Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism
Patent
1991-08-30
1993-09-14
Heyman, John S.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
360 71, 360 75, 360 7306, G11B 1543
Patent
active
052454851
ABSTRACT:
The invention is one or more tape systems which determine the length of tapes mounted therein to assess the thickness of such tapes. A format identifier is written at one of a plurality of locations on the tape depending upon the tape thickness. The format identifier for a relatively thin tape is written further from the leader block than that for a relatively thick tape, thereby avoiding the writing of user data in a region of the tape embossed with wrap deformations. The thickness determination is combined with a determination of the tape format to assess the compatibility of a desired operation on a tape mounted in a tape system therewith. If the operation is not compatible with the tape and the tape system, the tape system will not permit such operation to continue. A method for operating the tape systems is also disclosed, and accounts for various contingencies, such as blank tapes and marginal determinations of tape thickness.
REFERENCES:
patent: 3842326 (1974-10-01), Stocker
patent: 4125881 (1978-11-01), Elge et al.
patent: 4237371 (1980-11-01), Kamoto
patent: 4280159 (1981-07-01), Nakayama
patent: 4334656 (1982-06-01), Crawford et al.
patent: 4389600 (1983-06-01), Milligan et al.
patent: 4399936 (1983-08-01), Rueger
patent: 4406425 (1983-09-01), Bullock et al.
patent: 4435762 (1984-03-01), Milligan et al.
patent: 4452406 (1984-06-01), Richard
patent: 4454282 (1984-06-01), Bradshaw et al.
patent: 4467411 (1984-09-01), Fry et al.
patent: 4525424 (1985-06-01), Bradshaw
patent: 4531166 (1985-07-01), Anderson
patent: 4541027 (1985-09-01), Danielsen et al.
patent: 4568611 (1986-02-01), Amirsakis et al.
patent: 4644436 (1987-02-01), Unno
patent: 4685005 (1987-08-01), Fields, Jr.
patent: 4956730 (1990-09-01), Arai et al.
Dunn Edwin C.
Jeppson Orvid B.
Wilson Steven B.
Heyman John S.
International Business Machines - Corporation
Schecter Manny W.
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