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:
Apr. 27, 1993
Filed:
Aug. 31, 1990
Hugh C Holland, Brackney, PA (US);
Robert J Kammerer, Endicott, NY (US);
Ronald S Svec, Berkshire, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A device information interface for a channel to channel I/O device having a plurality of channel adapters. A device interface bus interconnects each of the channel adapters, permitting an exchange of data between channel adapters. A virtual device storage array at each channel adapter stores the status of inactive channel devices associated with a connected channel. Inquiries as to the status of a logical adapter may be sent over the device interface bus. Logic circuits at the receiving adapter will decode the inquiry and address the virtual storage array to obtain the status of the logical adapter for forwarding over the bus to the inquiring adapter.