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US 2004/0057149 A1Published application
Magnetic disk medium, fixed magnetic disk drive unit, and method thereof
AssigneeFuji Electric Co., Ltd.
InventorsTsuyoshi Yoshizawa, Kiminori Sato
Life of this patent
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Abstract
A magnetic disk medium allows embedding ID information that prevents manipulation and yet holds its uniqueness. ID information for uniquely identifying a medium is recorded separately as a master ID information on a preformatted region and as individual medium ID information on a non-preformatted region in a pre-embossed type magnetic disk.
Claims7
A magnetic disk medium comprising:
- a substrate having a recording region, the recording region having a preformatted region with uneven surface structure, and a non-preformatted region with uniform surface structure,
- wherein ID information for uniquely identifying the magnetic disk medium is recorded in the recording region, the ID information including first ID information prestored in the preformatted region and second ID information stored in the non-preformatted region.
A method of securing data in a magnetic recording medium, comprising the steps of:
- providing a substrate having a recording region, the recording region having a preformatted region with uneven surface structure, and a non-preformatted region with uniform surface structure;
- recording ID information for uniquely identifying the magnetic disk medium in the recording region,
- wherein the ID information includes first storing first ID information in the preformatted region and then storing second ID information in the non-preformatted region.
Dependencies are inferred from the claim text.