Servo pattern characterization on magnetic disks

Details Servo pattern characterization on magnetic disks Servo pattern characterization on magnetic disks

2006-05-11

2008-07-08

Nguyen, Hoa T. (Department: 2627)

Dynamic magnetic information storage or retrieval

Checking record characteristics or modifying recording...

C360S075000, C360S077040, C360S051000

Reexamination Certificate

active

07397621

ABSTRACT:
In one embodiment, a surface analyzer system comprises a radiation targeting assembly to target radiation onto a surface, a reflected radiation collecting assembly that collects radiation reflected from the surface, and a signal processing module. The signal processing module generates an image of magnetic characteristics of the magnetic disk, wherein the image comprises a plurality of servo sector arcs, locates a sample of points on a plurality of the servo sector arcs, fits a circle to the sample of points on each of the plurality of servo sector arcs, and determines at least one pivot-to-gap measurement from the radius of the circles.

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