Two-pass-per-track servo burst patterns

Details Two-pass-per-track servo burst patterns Two-pass-per-track servo burst patterns

2006-10-31

2006-10-31

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07130146

ABSTRACT:
A rotatable storage media includes multiple concentric data tracks and servo sectors embedded within the tracks. In some embodiments, the servo sectors have servo burst patterns including a plurality of burst groups, with each of the burst groups including a trimmed burst that is stitched and trimmed such that is has a first width, and an untrimmed burst that has a second width that is less than the first width. In other embodiments, each of the burst groups include a pair of untrimmed bursts, with one of the untrimmed bursts being wider than the other. In still another embodiment, all bursts are trimmed, but some are wider than others. Preferably, such burst patterns are written using a two-pass-per-track servowriting scheme. This description is not intended to be a complete description of, or limit the scope of, the invention.

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