Exception condition determination at a control unit in an I/O processing system

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United States of America Patent

PATENT NO 7917813
SERIAL NO

12030985

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A computer program product, apparatus, and method for providing exception condition feedback at a control unit to a channel subsystem in an I/O processing system are provided. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method. The method includes receiving a command message at the control unit from the channel subsystem, and detecting an exception condition in response to unsuccessful execution of at least one command in the command message. The method further includes identifying a termination reason code associated with the exception condition, writing the termination reason code to a response message, and sending the response message to the channel subsystem.

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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
Carlson, Scott M Tucson, US 74 2540
Casper, Daniel F Poughkeepsie, US 105 3368
Flanagan, John R Poughkeepsie, US 115 2866
Gainey, Charles W Poughkeepsie, US 18 404
Hathorn, Roger G Tucson, US 159 2585
Huang, Catherine C Poughkeepsie, US 46 1899
Kalos, Matthew J Tucson, US 266 3419
Njoku, Ugochukwu Charles Yonkers, US 4 299
Ricci, Louis C Hyde Park, US 2 1
Sittmann, Gustav E Webster Groves, US 39 2200

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