Introducing connectivity
This chapter introduces the connectivity options available on the IBM zEnterprise EC12 and System z families of servers. The following topics are briefly discussed:
Connectivity support
Channel subsystem (CSS)
I/O cages, I/O drawers, and PCIe I/O drawers
Supported channel types
The input/output architecture, implementation, and system-relevant rules for zEC12 and System z servers are described in detail in subsequent chapters.
1.1 Overview
Input/output (I/O) channels1 are components of the zEC12 and System z CSS and ...

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