Systems and methods for two-step reference pattern self-servowriting
AssigneeMatsushita Electric Inductrial Co., Ltd.
InventorRichard M. Ehrlich
Life of this patent
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Abstract
A two-step self-servowriting process first writes an intermediate pattern based on a reference pattern, and then writes a final pattern based on the intermediate pattern, wherein the reference pattern can be a printed media or a spiral pattern. Such an approach can be utilized to reduce the noise/runout, eliminate timing eccentricity, and increase the sample rate of the final pattern. 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.
Claims18
A method for two-step self-servowriting, comprising:
- storing one or more patterns on a plurality of servo tracks on a surface of a rotatable medium, wherein the one or more patterns can include at least one of a reference pattern, an intermediate pattern and a final pattern, wherein the reference pattern is not created by a servowriter or a media writer;
- positioning a read/write head relative to the surface of the rotatable medium;
- writing the intermediate pattern based on the reference pattern via the read/write head;
- and
- writing the final pattern based on the intermediate pattern via the read/write head.
A system for two-step self-servowriting, comprising:
- a rotatable medium including a surface having a plurality of servo tracks operable to store one or more patterns including at least one of a reference pattern, an intermediate pattern and a final pattern, wherein the reference pattern is not created by a servowriter or a media writer;
- a read/write head including:
- a read element operable to read the one or more patterns;
- and
- a write element operable to write the intermediate and/or the final pattern;
- and
- one or more controllers operable to:
- position the read/write head relative to the surface of the rotatable medium;
- write the intermediate pattern based on the reference pattern via the read/write head;
- and
- write the final pattern based on the intermediate pattern via the read/write head.
A system for two-step self-servowriting, comprising:
- means for storing one or more patterns on a plurality of servo tracks on a surface of a rotatable medium, wherein the one or more patterns can include at least one of a reference pattern, an intermediate pattern and a final pattern, wherein the reference pattern is not created by a servowriter or a media writer;
- means for positioning a read/write head relative to the surface of the rotatable medium;
- means for writing the intermediate pattern based on the reference pattern via the read/write head;
- and
- means for write the final pattern based on the intermediate pattern via the read/write head.
Dependencies are inferred from the claim text.