Xebec Development Partners, Ltd.

John J Schadegg

Donald R Redmond

An intelligent hard disk drive subsystem including control circuitry and disk drive storage media along with drive mechanics in a combination including a standardized interface between the intelligent subsystem and a host computer wherein the data is buffered, serialized, deserialized, conditioned, precompensated, and located within the media, all under the control of a microprocessor within the subsystem. A method of formatting the media is provided which eliminates the need for a track 0 sensing switch, and which provides for formatted guard bands on the disk. The formatting process locates the head through a sequence of writing, indexing, and reading, until a stop is located by the fact that the head reads what it has just written.

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Foster City, CA, United States of America

John J Schadegg