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US 2005/0185548 A1Published application
Information access control for optical media
OwnerCharles Weirauch, Edward Beeman +3inventors
InventorsCharles Weirauch, Edward Beeman, Christiaan Steenbergen, Dirk Erickson, Thomas Pratt
Life of this patent
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Abstract
A drive refuses to transfer information from a first surface on an optical medium unless required information is present on a second surface of the medium. Optionally, information on the first surface may indicate that information on the second surface is required. For example, a drive may refuse to transfer data from a data surface unless a serial number is readable on an exterior surface.
Claims16
A method, comprising:
- refusing, by a drive, to provide information from a first surface of an optical medium when required information on a second surface of the optical medium cannot be read.
An optical medium, comprising:
- a first surface, the first surface having an indication that information on a second surface is required;
- and
- information on the second surface corresponding to the indication on the first surface.
A drive for optical media, comprising:
- a controller, the controller transferring, externally to the drive, information from a first surface on an optical medium, only when required information can be read on a second surface on the optical medium.
A drive for optical media, comprising:
- means for detecting that information on a first surface of an optical medium is required;
- and
- means for refusing to transfer information, externally to the drive, from a second surface of the optical medium, unless the required information on the first surface can be read by the drive.
Dependencies are inferred from the claim text.