Angularly spaced spiral erase for media

Details Angularly spaced spiral erase for media Angularly spaced spiral erase for media

2007-05-18

2010-06-01

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

C360S078040, C360S046000

Reexamination Certificate

active

07729076

ABSTRACT:
Embodiments of the present invention allow for media erasure. Various embodiments allow for controlling an actuator based on feedback signal measurements and disk phase to seek a head across a surface of a disk systematically for an erasure operation. Also, in various embodiments, a substantially repeatable seek motion of a head across a stroke may be determined, and launch points at which the head is launched over a disk in the seek motion for erasing at least a portion of the disk are determined based on disk phase.

REFERENCES:
patent: 5668679 (1997-09-01), Swearingen et al.
patent: 6507450 (2003-01-01), Elliott
patent: 7123435 (2006-10-01), Schreck
patent: 7133233 (2006-11-01), Ray et al.
patent: 7460324 (2008-12-01), Ohinata et al.
patent: 7529055 (2009-05-01), Laks et al.
patent: 2004/0075936 (2004-04-01), Lee
patent: 2007/0291401 (2007-12-01), Sun et al.

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