Patent ID: 8838860
Filing Date: 2014-09-16
Classification: G06F

Abstract:
1. A computer program product for determining extended capability of a channel path in an input/output (I/O) processing system, the computer program product comprising: a non-transitory computer-readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising: receiving a request at a channel subsystem in a host computer system from an operating system in the host computer system to provide a channel path description for a channel path, wherein the channel path includes a channel configured to be coupled to a control unit configured to operate and control one or more I/O devices, the channel subsystem configured to direct information flow between memory and the control unit via the channel path; and outputting from the channel subsystem to the operating system, a channel path description block including the channel path description for the channel path in response to the request, wherein the channel path description block includes: a descriptor field (DESC) indicating that the channel path supports a Fibre Channel protocol for commanding an I/0 operation; and an extension support indicator field (F) specifying whether the channel path supports an extension to the Fibre Channel protocol.