Dust-immune reading method and apparatus for magnetic tape trans

Details Dust-immune reading method and apparatus for magnetic tape trans Dust-immune reading method and apparatus for magnetic tape trans

1994-04-25

1995-07-25

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 381, 360 53, G11B 1544

Patent

active

054367743

ABSTRACT:
A method of reading a length of multitrack magnetic tape on which data is written on each track in the form of a succession of blocks, with each data block carrying a block marker. While data on each track is being read by a transducer, the output therefrom is monitored for detecting a possible blank on the track from the block markers. The tape is stopped, rewound, and paid off again when a possible blank is detected, in order to retry reading of the detected possible blank. If the detected possible blank is due to dust accumulation on the tape or on the transducer, data written thereon may be read during the retry. Reading is discontinued if no block marker is detected during the retry. Reading of a detected possible blank may be retried only at a starting part of each track, where dust is particularly easy to accumulate, or throughout each track.

REFERENCES:
patent: 3729203 (1973-04-01), Kinard
patent: 3731289 (1973-05-01), Bajgert et al.
patent: 3871024 (1975-03-01), Camras
patent: 4777541 (1988-10-01), Knowlton
patent: 4816940 (1989-03-01), Nagasawa et al.
patent: 5050018 (1991-09-01), Georgis et al.
patent: 5251077 (1993-10-01), Saitoh

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