Method and apparatus for pre-recording tracking information on m

Details Method and apparatus for pre-recording tracking information on m Method and apparatus for pre-recording tracking information on m

1984-03-13

1986-04-29

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 78, G11B 554

Patent

active

045860947

ABSTRACT:
A method and apparatus for initializing a data-recording media, particularly tape, by use of the same type of media drive used for data-recording purposes, in which the actual edge of the recordable field on the media is first located by a test read/write process and the media is then transported in a succession of passes across the transducing head, during each of which the head is periodically and selectively energized to write mutually-spaced marker bursts and servo-positioning bursts, with the transducing head being moved open-loop a distance corresponding to a half-track width between each media transport. During the first such pass, the marker bursts and servo-positioning bursts are located on the basis of tape travel distance, and on successive passes burst location is determined by sensing the previously-recorded marker and servo bursts and timing-out a predetermined distance therefrom by use of an internal clock. In the case of tape-form media, tape transport and transducer-positioning is carried out in a serpentine pattern.

REFERENCES:
patent: 4390917 (1983-06-01), Watanabe
patent: 4414589 (1983-11-01), Oliver et al.
patent: 4414593 (1983-11-01), Miller et al.
patent: 4472750 (1984-09-01), Klumpp et al.
patent: 4476503 (1984-10-01), Solhjell

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