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
12/031023
Publication Number
20090210571
Application Date
February 14, 2008
Publication Date
August 20, 2009
Inventor
Louis W Ricci
Hyde Park
NY, US
Matthew J Kalos
Tucson
AZ, US
Catherine C Huang
Poughkeepsie
NY, US
John R Flanagan
Poughkeepsie
NY, US
Daniel F Casper
Poughkeepsie
NY, US
Agent
Cantor Colburn IBM Poughkeepsie
CT, US
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 03/00
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