Managing sets of input/output communications subadapters of...

Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output access regulation

Reexamination Certificate

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C710S038000

Reexamination Certificate

active

10764421

ABSTRACT:
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 64 k subchannels.

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