The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 2004
Filed:
Jan. 15, 2003
Jeffrey Dicorpo, San Carlos, CA (US);
Stanley Smith Feather, Jr., Longmont, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
An apparatus comprises a data path capable of coupling a physical device to a plurality of initiators. An interface is coupled to the data path and forms a command pathway between the plurality of initiators and the physical device. The controller is coupled to the data path and coupled to the interface. A controller comprises an executable process that creates a virtual device object that resolves conflicting concurrent attempts to access the physical device by a plurality of initiators. The virtual device object is capable of protecting state of the physical device during successive data transfer and media movement operations by emulating responses of the physical device and redirecting access to the physical device when the physical device becomes available.