Systems and rotatable media for increasing the usable...

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Reexamination Certificate

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10983448

ABSTRACT:
Systems for writing preferred servo patterns, and rotatable storage media including preferred servo patterns, are provided. Systems for controlling write currents to produce servo bursts having a desired width are also provided. In accordance with specific embodiments, the desired burst width is three-fourths of a data track wide. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures and the claims.

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Ono, H, “Architecture and Performance of the ESPER-2 Hard-Disk Drive Servo Writer,” IBM J. Res. Develop., 37(1):3-11 (1993).

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