Hardware I/O configuration

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In the CPC, the input/output (I/O) subsystem, which controls channel operations, requires specific data about the hardware I/O configuration.

To define the I/O configuration for the I/O subsystem, run the Input/Output Configuration Program (IOCP). To run IOCP, you need to specify:
  • Logical partitions
  • Channel paths on the central processor complex (CPC) and their assignment to logical partitions
  • Control units attached to the channel paths
  • I/O devices assigned to the control units
  • PCIe adapter functions on the CPC and their assignment to logical partitions.

Also, to meet changing I/O requirements, you can replace an existing I/O configuration with a new configuration by running IOCP.

All control units and I/O devices that attach to the CPC must be defined to the channel subsystem by using IOCP.

See List of I/O devices and control units for a partial list of control units and I/O devices available.
Note: Your CPC might not support all the devices listed in List of I/O devices and control units.