Method and apparatus for writing and reading servo...

Details Method and apparatus for writing and reading servo... Method and apparatus for writing and reading servo...

2007-01-23

2007-01-23

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S048000

Reexamination Certificate

active

10126917

ABSTRACT:
A method and apparatus for writing spiral servo information onto one or more disk surfaces at a variable velocity using a servo track writer (STW) is provided. In one embodiment, a variable velocity profile is chosen so that spiral crossing angles across the disk surface are set to be equal. In another embodiment, a variable velocity profile is chosen so that spiral crossing angles across groups of tracks (i.e., two or more tracks) are set to be equal. In yet another embodiment, a variable velocity profile is chosen to adjust the number of tracks per inch (TPI) across the disk surface.

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