G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.32, 352/2
G11B 5/55 (2006.01) G11B 5/584 (2006.01) G11B 21/08 (2006.01) G11B 21/10 (2006.01) G11B 27/30 (2006.01) G11B 5/596 (2006.01)
Patent
CA 1232066
METHOD AND APPARATUS FOR PRE-RECORDING TRACKING INFORMATION ON MAGNETIC MEDIA ABSTRACT OF THE DISCLOSURE 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 previouslv-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.
475320
Chambors John M.
Lum Francis
Borden Ladner Gervais Llp
Irwin Magnetic Systems Inc.
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