NEW RECORDING HEAD FOR PERPENDICULARLY ORIENTED Ba-FERRITE MEDIA

Yamamori, K.; Jitosho, Tamotsu; Tanaka, Tsutomu

doi:10.3379/jmsjmag.15.s2_45

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Overwrite Effect On Bit Shift1

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1991

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“…For 35 kFRPI signal, the bit shift increase caused by overwriting is almost the same for the Ba-ferrite and the metal FDs. The total bit shift for the Ba-ferrite FD is also smaller than that for the metal FD, because the Ba-ferrite FD has the smaller intrinsic bit shift, owing to its higher output ability at high densities [2]. It can be understood that the conventional OWM does not reflect the practical bit shift increase.…”

Section: Overwrite Effect On Bit Shiftmentioning

confidence: 98%

ORIENTATION EFFECTS ON OVERWRITE CHARACTERISTICS IN Ba-FERRITE FLEXIBLE DISKS

1991

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Perpendicular orientation effects on overwrite characteristics in Ba-ferrite floppy disks (FDs) were investigated with three different heads (MTE, FTE and DS-MIG heads). The principal results are as follows. (1) The relationship between overwrite modulation and overwritten signal density depends both on head type and media orientation. (2) The effect of overwrite on bit shift cannot be judged by the OWM value for a particular density. (3) For both a 20kFRPI and a 35kFRPI signals overwritten on pre-recorded random pattern signal, in the 1-7 coding system, the total bit shift for Ba-ferrite FD is smaller than that for metal FD.

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Section: Overwrite Effect On Bit Shiftmentioning

confidence: 98%