Determining extended capability of a channel path

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United States of America Patent

PATENT NO 8838860
SERIAL NO

13833378

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Abstract

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A computer program product includes a tangible storage storing instructions for performing a method. The method includes 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, 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. The channel path description block includes: a descriptor field (DESC) indicating that the channel path supports a Fiber Channel protocol for commanding an I/O operation; and an extension support indicator field (F) specifying whether the channel path supports an extension to the Fiber Channel protocol.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Casper, Daniel F Poughkeepsie, US 105 3366
Gainey,, Jr Charles W Poughkeepsie, US 140 2328

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