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Ugochukwu Njoku
Frank W Brice, Charles W Gainey, Marten J Halma, Eugene P Hefferon, Carol B Hernandez, Jeffrey P Kubala, Tan Lu, Ugochukwu Njoku Charles, Kenneth J Oakes, Dale F Riedy, Charles E Shapley, Gustav E Sittmann, Leslie W Wyman, Harry M Yudenfriend: Managing input/output subsystem images of an input/output subsystem. International Business Machines Corporation, Heslin Rothenberg Farley & Mesiti PC, November 18, 2004: US20040230783-A1

An input/output subsystem is configured as a plurality of input/output subsystem images, each of which appears to a program as an independent input/output subsystem. One or more input/output subsystem images of the plurality of input/output subsystem images are managed. An aspect of this management ...


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Michael C Cox, Richard Cwiakala, Jean Louis Fava, Gary A Fisher Sr, Robert J Gallagher, Eugene P Hefferon, Karl H Hoppe, Peter I Kania, Martin W Sachs: Methods and apparatus for dynamically managing input/output (I/O) connectivity. International Business Machines Corporation, Floyd A Gonzalez, March 22, 1994: US05297262 (165 worldwide citation)

A computer system, including at least one host (processor and operating system), a channel subsystem and at least one switch (together with an associated switch controller) for switchably connecting an I/O device (together with an associated I/O device control unit) to a host via said channel subsys ...


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Richard Cwiakala, Eugene P Hefferon, Kenneth J Oakes, Allen H Preston, David E Stucki, Leslie W Wyman, Harry M Yudenfriend: Dynamically changing a system I/O configuration definition. International Business Machines, Floyd A Gonzalez, December 8, 1992: US05170472 (146 worldwide citation)

A mechanism for changing the system I/O configuration definition in the channel subsystem of a data processing system without having to do a power on reset operation. The data processing system includes one or more central processing units, an I/O processor, a storage addressable by the central proc ...


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Frank W Brice Jr, Eugene P Hefferon, Casper A Scalzi, Richard P Tarcza: Method and system for providing a hardware machine function in a protected virtual machine. International Business Machines Corporation, Floyd A Gonzalez, Marc A Ehrlich, June 26, 2001: US06253224 (60 worldwide citation)

This invention describes a method and system for virtualizing an internal capability of a computing system; specifically, the invention describes a method and system for establishing a virtual machine containing a programmed hardware-machine function that is normally executed natively as proprietary ...


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Steven G Glassen, Marten J Halma, Eugene P Hefferon, Allan S Meritt, Kenneth J Oakes, Harry M Yudenfriend: Measuring utilization of individual components of channels. International Business Machines Corporation, Eugene I Shkurko Esq, Blanche E Schiller Esq, Heslin Rothenberg Farley & Mesiti P C, November 8, 2005: US06963940 (54 worldwide citation)

The utilization of various individual components of a channel is determined in order to learn which portion of a channel is busy and to what extent that portion is busy. The determination of a component's utilization is dependent on the type of component, as well as the operational characteristics o ...


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Frank W Brice Jr, Eugene P Hefferon, Casper A Scalzi, Richard P Tarcza: Method and system for providing a hardware machine function in a protected virtual machine. International Business Machines Corporation, Marc A Ehrlich, Floyd A Gonzalez, January 20, 2004: US06681238 (54 worldwide citation)

This invention describes a method and system for virtualizing an internal capability of a computing system; specifically, the invention describes a method and system for establishing a virtual machine containing a programmed hardware-machine function that is normally executed natively as proprietary ...


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Brent C Beardsley, Eugene P Hefferon, Kenneth R Lynch, Stephen W Schimke, Lloyd R Shipman Jr, Susan M Wethington: Device initiated partial system quiescing. International Business Machines Corporation, November 13, 1990: US04970640 (37 worldwide citation)

A data processing system includes a plurality of host systems and peripheral subsystems, particularly data storage subsystems. Each of the data storage subsystems includes a plurality of control units attaching a plurality of data storage devices such as direct access storage devices (DASD) for stor ...


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Michael E Baskey, Steven G Glassen, Eugene P Hefferon, Bruce H Ratcliff, Arthur J Stagg, Stephen R Valley: Apparatus for providing direct data processing access using a queued direct input-output device. International Business Machines Corporation, Floyd A Gonzalez, Andrew J Wojnicki Jr, Eugene I Shkurko, December 13, 2005: US06976083 (36 worldwide citation)

An apparatus for providing direct data processing access in a network computing system environment. The system environment has a main storage which can be connected to one or more application servers and is in processing communication with an interface element. The interface element has at least one ...


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Joseph C Elliott, Eugene P Hefferon, Allan S Meritt, Martin W Sachs, Mark C Snedaker: Acquiring addresses in an input/output system. International Business Machines, Floyd A Gonzalez, January 4, 1994: US05276813 (33 worldwide citation)

In a computer I/O system including a plurality of link-level facilities and a dynamic switch having a plurality of ports, each link-level facility being attached to an individual one of the ports, a mechanism and method for assigning a unique link level address to each of the link-level facilities. ...



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