Servo track configuration for magnetic disk apparatus

Details Servo track configuration for magnetic disk apparatus Servo track configuration for magnetic disk apparatus

1979-03-05

1980-12-09

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record medium

360135, 360 77, G11B 574, G11B 582, G11B 2110

Patent

active

042388090

ABSTRACT:
A servo track apparatus comprising at least one unit pattern area including 2n (n=2, 3, 4, . . . ) servo tracks T.sub.i (i=0, 1, . . . 2n-1) and 2n.sup.2 flux transitions R.sub.jk (j=0, 1, . . . 2n-1; k=0, 1, . . . n-1). The tracks and flux transitions satisfy a condition TT requiring that track T.sub.p be adjacent to track T.sub.p+1 ; a condition TR requiring that transition R.sub.pq occur on track T.sub.p+q (mod 2n); a condition RR requiring that transitions R.sub.pq and R.sub.pr (r.noteq.q) have the same polarity and occur at the same position; and a condition RR requiring that transitions R.sub.pr and R.sub.qr (q.noteq.p) occur at different positions.

REFERENCES:
patent: 3534344 (1970-10-01), Santana
patent: 3691543 (1972-09-01), Mueller
patent: 4068267 (1978-01-01), Inouye
patent: 4068269 (1978-01-01), Commander et al.
patent: 4163265 (1979-07-01), Van Herk et al.

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