Vertical track zoning for disk drives

Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data in specific format

Reexamination Certificate

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C360S031000, C360S075000

Reexamination Certificate

active

10340855

ABSTRACT:
A data storage device has multiple storage media surfaces and corresponding heads, each storage media surface includes multiple regions, and each head is for recording on and playback of information from a corresponding storage media surface. A method of defining a storage format for the storage media surfaces includes reading data from each region on each storage media surface with the corresponding head, measuring a record/playback performance of each head for each region on each corresponding storage media surface based on the data read from the regions, and selecting a track density for each region on each storage media surface based on the measured record/playback performance of the corresponding head for the region.

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“Measure a Disk-Drive's Read Channel Signals”, Aug. 1999, Test & Measurement World, Published by Cahners Business Information, Newton, MA.

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