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 connectivity, a plurality of sets of I/O subadapters is provided to an operating system image. This allows programs of the operating system image to access a same component via different sets of I/O communications subadapters. Further, it enables an operating system image to use more than 64k subchannels.

Title
Managing sets of input/output communications subadapters of an input/output subsystem
Application Number
10/764421
Publication Number
20050165969
Application Date
January 23, 2004
Publication Date
July 28, 2005
Inventor
Harry M Yudenfriend
Poughkeepsie
NY, US
Leslie W Wyman
Poughkeepsie
NY, US
Gustav E Sittmann
Webster Groves
MO, US
Charles E Shapley
Salt Point
NY, US
Dale F Riedy
Poughkeepsie
NY, US
Kenneth J Oakes
Wappingers Falls
NY, US
Ugochukwu Njoku Charles
Bronx
NY, US
Tan Lu
Poughkeepsie
NY, US
Hans Helge Lehmann
Jeffrey P Kubala
Poughquag
NY, US
Charles W Gainey
Poughkeepsie
NY, US
Janet R Easton
Woodstock
NY, US
Frank W Brice
Hurley
NY, US
Agent
Heslin Rothenberg Farley & Mesiti PC
NY, US
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 03/00
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