Electricity: measuring and testing – Magnetic – Magnetic information storage element testing
Reexamination Certificate
2006-03-07
2006-03-07
Ledynh, Bot (Department: 2862)
Electricity: measuring and testing
Magnetic
Magnetic information storage element testing
Reexamination Certificate
active
07009391
ABSTRACT:
The present invention provides a method for detecting missing servo patterns on printed recording media. In general, the method first comprises the step of generating a map of anticipated servo burst patterns for a magnetic medium. The magnetic medium is typically a magnetic storage disc. Next, the magnetic medium is placed onto a disc reading assembly. Using the disc reading assembly, individual servo bursts on the magnetic medium are identified. In one embodiment, signals from the magnetic medium are processed through a frequency down conversion process, coupled with band pass filtering and rms-to-DC conversion. This enables higher throughput of signal processing. A map of identified servo bursts on the magnetic medium can then be generated. The map of identified servo bursts is then compared with the map of anticipated servo burst patterns. In this way, missing servo bursts can be detected.
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Kuo David
Lee Shih-Fu
Pressesky Jason L.
Ledynh Bot
Morrison & Foerster / LLP
Seagate Technology LLC
Whittington Kenneth J.
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