The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2012
Filed:
Feb. 14, 2008
Harry M. Yudenfriend, Poughkeepsie, NY (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Matthew J. Kalos, Tucson, AZ (US);
Dale F. Riedy, Poughkeepsie, NY (US);
Louis W. Ricci, Hyde Park, NY (US);
Roger G. Hathorn, Tucson, AZ (US);
Gustav E. Sittmann, Tucson, AZ (US);
Ugochukwu C. Njoku, Yonkers, NY (US);
Catherine C. Huang, Poughkeepsie, NY (US);
Scott M. Carlson, Tucson, AZ (US);
Harry M. Yudenfriend, Poughkeepsie, NY (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Matthew J. Kalos, Tucson, AZ (US);
Dale F. Riedy, Poughkeepsie, NY (US);
Louis W. Ricci, Hyde Park, NY (US);
Roger G. Hathorn, Tucson, AZ (US);
Gustav E. Sittmann, Tucson, AZ (US);
Ugochukwu C. Njoku, Yonkers, NY (US);
Catherine C. Huang, Poughkeepsie, NY (US);
Scott M. Carlson, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The state of an input/output (I/O) operation is determined in an I/O processing system. A command is received from an I/O operating system at a channel subsystem for initiating the I/O operation, a time period is for completion of the I/O operation, and the command for initiating the I/O operation is sent from the channel subsystem to the control unit. Responsive to the time period nearing elapsing without the I/O operation completing, a cancel instruction is received from the I/O operating system at the channel subsystem. Responsive to a determination by the I/O operating system to interrogate the control unit, an instruction to interrogate the control unit is received with the cancel instruction from the I/O operating system.