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Ugochukwu Njoku
Frank W Brice Jr, Janet R Easton, Charles W Gainey Jr, Jeffrey P Kubala, Hans Helge Lehmann, Tan Lu, Ugochukwu Njoku Charles, Kenneth J Oakes, Dale F Riedy Jr, Charles E Shapley, Gustav E Sittmann, Leslie W Wyman, Harry M Yudenfriend: Managing sets of input/output communications subadapters of an input/output subsystem. International Business Machines Corporation, Eugene I Shkurko Esq, Blanch E Schiller Esq, Heslin Rothenberg Farley & Mesiti P C, October 2, 2007: US07277968 (35 worldwide citation)

Input/output (I/O) communications subadapters, such as subchannels, of an I/O subsystem are dedicated to components, such as I/O devices, of the I/O subsystem. The subadapters provide information about the associated components, in response to the execution of I/O instructions. To enhance I/O connec ...


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Ugochukwu Njoku
Frank W Brice, Janet R Easton, Charles W Gainey, Jeffrey P Kubala, Hans Helge Lehmann, Tan Lu, Ugochukwu Njoku Charles, Kenneth J Oakes, Dale F Riedy, Charles E Shapley, Gustav E Sittmann, Leslie W Wyman, Harry M Yudenfriend: Managing sets of input/output communications subadapters of an input/output subsystem. International Business Machines Corporation, Heslin Rothenberg Farley & Mesiti PC, July 28, 2005: US20050165969-A1

Input/output (I/O) communications subadapters, such as subchannels, of an I/O subsystem are dedicated to components, such as I/O devices, of the I/O subsystem. The subadapters provide information about the associated components, in response to the execution of I/O instructions. To enhance I/O connec ...


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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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George H Bean, Terry L Borden, Mark S Farrell, Peter H Gum, Roger E Hough, Francis E Johnson, Donald W McCauley, Mark E Rakhmilevich, John C Rathjen, Casper A Scalzi, John F Scanlon, Leslie W Wyman: Logical resource partitioning of a data processing system. International Business Machines Corporation, Bernard M Goldman, June 27, 1989: US04843541 (299 worldwide citation)

The embodiment discloses a method and means for partitioning the resources in a data processing system into a plurality of logical partitions. Host control code may be embodied in programming, microcode, or by special hardware to enable highly efficient operation of a plurality of preferred guest pr ...


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Frank W Brice Jr, Joseph C Elliott, Kenneth J Fredericks, Robert E Galbraith, Marten J Halma, Roger E Hough, Suzanne M John, Paul A Malinowski, Allan S Meritt, Kenneth J Oakes, John C Rathjen Jr, Martin W Sachs, David E Stucki, Leslie W Wyman: Method and means for sharing I/O resources by a plurality of operating systems. International Business Machines Corporation, Bernard M Goldman, May 9, 1995: US05414851 (150 worldwide citation)

Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), ...


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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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Kenneth J Fredericks, Robert E Galbraith, Richard R Guyette, Marten J Halma, Roger E Hough, Suzanne M John, James C Mazurowski, Kenneth J Oakes, Leslie W Wyman: Pass-through for I/O channel subsystem call instructions for accessing shared resources in a computer system having a plurality of operating systems. International Business Machines Corporation, Bernard M Goldman, February 4, 1997: US05600805 (142 worldwide citation)

Enables any OS of plural OSs within any of plural logical-resource partitions (LPARs) of a CEC to use interpretive execution for synchronously-executable CHSC (channel subsystem call) commands. A CHSC command authorization mask (CCAM) is provided to control which CHSC commands are allowed to execute ...


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Roger L Cormier, Robert J Dugan, Kenneth J Fredericks, Peter H Gum, Moon J Kim, Allen H Preston, Richard J Schmalz deceased, Charles F Webb, Leslie W Wyman: System for transferring data between I/O devices and main or expanded storage under dynamic control of independent indirect address words (IDAWs). International Business Machines Corporation, Bernard M Goldman, October 24, 1995: US05461721 (93 worldwide citation)

Enables an I/O channel program to use IDAWs (indirect data address words) to control data transfers from/to an I/O (input/output) device to/from either or both of ES (expanded storage) and/or system MS (main storage), in which data moved to/from ES does not move through MS. ES and MS are plural elec ...


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Juergen Maergner, Allan S Meritt, Jeffrey M Nick, Leslie W Wyman, Harry M Yudenfriend: Processing channel subsystem pending I/O work queues based on priorities. International Business Machines Corporation, Floyd A Gonzalez Esq, Kevin P Radigan Esq, Heslin Rothenberg Farley & Mesiti P C, November 18, 2003: US06651125 (84 worldwide citation)

Asynchronous requests, such as input/output (I/O) requests, within a coprocessor of a computing environment are managed. The management of the asynchronous requests is based on priorities associated with the asynchronous requests. This management includes, for instance, selecting an asynchronous req ...