Magnetic tape storage unit with improved ability to read data by

Details Magnetic tape storage unit with improved ability to read data by Magnetic tape storage unit with improved ability to read data by

1992-09-22

1995-02-21

Shepperd, John

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 61, 360 53, G11B 1512, G11B 509

Patent

active

053921704

ABSTRACT:
A method and apparatus for reading data contained in blocks arranged in a number of tracks on a storage medium, wherein movement of the storage medium causes the tracks to deviate from a nominal path, are disclosed. In the method and apparatus, a set of multiple read elements is disposed relative to the storage medium so that each of the read elements covers at least a portion of the expected area in which a track to be read will be found, given movement of the storage medium. Each of the read elements has a read channel uniquely associated therewith, and all of the read elements are used simultaneously to read the data blocks. The read channels are monitored, and a first arriving, correctly read block is selected from among the channels, the selected block being the next block in a sequence, following a previously selected block. The data blocks are then stored at memory locations correlated to their position in the sequence on the storage medium.

REFERENCES:
patent: 2628346 (1953-02-01), Burkhart
patent: 3761903 (1973-09-01), Bird, Jr. et al.
patent: 3769465 (1973-10-01), Wellbrock
patent: 4302783 (1981-11-01), Mima et al.
Patent Abstracts of Japan, vol. 5, No. 115 (P-72) (787) Jul. 24, 1981 (Japanese Application 56054625).
Patent Abstracts of Japan, vol. 5, No. 115, (P-72) (787) Jul. 24, 1981 (Japanese Application 56054631).

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