DETERMINING EXTENDED CAPABILITY OF A CHANNEL PATH

摘要

A computer program product includes a tangible storage storing instructions for performing a method. The method includes: sending a request from a processing unit in a host computer system to a channel subsystem to provide a channel path description for a channel path, the channel subsystem including a channel configured to be coupled to a control unit via the channel path and configured to control information transfer between the channel subsystem and the I/O device; and receiving channel path capability information by the processing unit, the capability information specified by a channel path description block including channel path identification and description information, the channel path description block specifying whether the channel path supports a Fibre Channel protocol for commanding an I/O operation, the channel path description block specifying whether the channel path supports an extension to the Fibre Channel protocol based on the channel path supporting the Fibre Channel protocol.

主权项

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 tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising: sending a request from a processing unit in a host computer system to a channel subsystem in the host computer system, the request to provide a channel path description for a channel path between the channel subsystem and an I/O device, the channel subsystem including a channel configured to be coupled to a control unit via the channel path, the channel configured to control information transfer between the channel subsystem and the I/O device; and receiving channel path capability information by the processing unit from the channel subsystem in response to the request, the capability information specified by a channel path description block including channel path identification and description information, the channel path description block specifying whether the channel path supports a Fibre Channel protocol for commanding an I/O operation, the channel path description block specifying whether the channel path supports an extension to the Fibre Channel protocol based on the channel path supporting the Fibre Channel protocol.