METHOD FOR PRE-RECORDING POSITIONING INFORMATION ON MAGNETIC RECORDING CARRIERS.
Номер патента: DE3583755D1
Опубликовано: 19-09-1991
Автор(ы): Francis Lum, John Michael Chambors
Принадлежит: Irwin Magnetic Systems Inc
Опубликовано: 19-09-1991
Автор(ы): Francis Lum, John Michael Chambors
Принадлежит: Irwin Magnetic Systems Inc
Реферат: A method of initializing a data-recording media (10), particularly tape, by use of the same type of media drive used for data-recording purposes, in which the edge (42) of the recordable field on the media (10) is first located by a test read write process and the media is then transported in a succession of passes across a transducing head (62), during each of which the head is periodically and selectively energized to write spaced marker bursts (46) and servo-positioning bursts (36, 38), with the transducing head (62) being moved open-loop a distance corresponding to a half-track width between each media transport. During the first such pass, the marker bursts (46) and servo-positioning bursts (36, 38) 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 a predetermined distance therefrom by use of an internal clock. In the case of tape, successive recording passes are made with the tape travelling alternately backwards and forwards.
Method and apparatus for pre-recording tracking information on magnetic media
Номер патента: CA1232066A. Автор: Francis Lum,John M. Chambors. Владелец: Irwin Magnetic Systems Inc. Дата публикации: 1988-01-26.