Magnetic disk medium and a fixed magnetic disk drive unit

Details Magnetic disk medium and a fixed magnetic disk drive unit Magnetic disk medium and a fixed magnetic disk drive unit

G - Physics

11

B

G11B 13/02 (2006.01) G06F 12/14 (2006.01) G11B 5/00 (2006.01) G11B 5/82 (2006.01) G11B 19/12 (2006.01)

Patent

CA 2434635

A magnetic disk medium having embedding ID information that is difficult to illicitly alter and that is unique provides the a basis for security systems such a content playback and distribution control systems. The ID information comprises a unalterable first ID information encoded onto a region of the magnetic disk medium having an uneven surface rendering it read-only and a unique second ID information encoded onto a region of the magnetic disk medium having a smooth surface supporting read and write operations.

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