A computer program product, an apparatus, and a method for processing communications between a control unit and a channel subsystem in an input/output 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: sending a command from the channel subsystem to the control unit to initiate an input/output operation; setting a time period for completion of the operation; and responsive to the operation not completing within the time period, sending a message to determine whether the control unit has an exchange open for the command.

Title
Processing of data to monitor input/output operations
Application Number
PCT/EP2009/051446
Publication Number
2009/101051
Publication Date
August 20, 2009
Inventor
Ricci Louis
Kalos Matthew
Huang Catherine
Flanagan John
Casper Daniel
Agent
WILLIAMS Julian David
Assignee
Ricci Louis
Kalos Matthew
Huang Catherine
Flanagan John
Casper Daniel
IBM United Kingdom
International Business Machines Corporation
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