Activate a configuration dynamically

The system programmer (or other authorized persons) can use the option Activate or verify configuration dynamically or the ACTIVATE operator command to make changes to a running configuration. That is, the possibility is offered to change from a currently active configuration to some other configuration that is to be made active without the need to POR or IPL the system again.

When activating a configuration dynamically, HCD compares the currently active IODF with the IODF that is to be activated and then processes the difference.

For the IODF that is to be activated, HCD uses the production IODF that is currently in use with the dialog. Use the same high-level qualifier for the currently active IODF and the IODF to be activated.

z/OS HCD Planningz/OS HCD Planning gives a detailed description of how to dynamically activate a configuration. It describes the prerequisites for a dynamic activation, explains when hardware and software changes or software-only changes are allowed, and describes the actions necessary to change your I/O configuration dynamically. The following sections describe how to use the HCD dialog for this purpose.

Before activating a configuration dynamically, you may want to view information about the IODF that has been used for IPL or the last dynamic activation.