IOCP and z/OS hardware configuration definition
The
Hardware Configuration Definition (HCD) defines the I/O configuration
information to both the z/OS® operating
system and the CPC I/O subsystem. HCD also allows you to dynamically
modify the I/O configuration without performing:
Using HCD you can add, delete, or modify the I/O definitions of logical partitions, PCIe functions, channel paths, control units, and I/O devices in the CPC. It also allows you to save the changes you made to the I/O configuration definitions and apply them to the power-on reset I/O configuration data set (POR IOCDS). You must use an IOCDS generated from an I/O definition file (IODF) to be able to dynamically modify the I/O configuration.