Configuring a channel path online or offline
Use the IEEMCF macro to configure a channel path online or offline, or to determine the physical status of the channel path.
Before using IEEMCF, you must do the following:
- Decide how many channel paths you would like to reconfigure or query.
- Obtain a contiguous area of storage from subpool 247. Specify an area whose length is equivalent to 36 bytes multiplied by the number of channel paths that you are reconfiguring.
- Include the mapping macro IEEMRCFP.
To configure a channel path or determine its physical status, you must issue IEEMCF twice: once with TYPE=BUILD and once with TYPE=INVOKE. TYPE=BUILD builds the parameter list containing information about the devices to be reconfigured or queried. TYPE=INVOKE configures or queries the physical status of the devices in the list built by TYPE=BUILD and receives data and return codes from the system.