Procedure for defining shared channel paths

To share channel paths, use the following general procedure:

1. Select which I/O devices to access through shared channel paths
2. Select the LPs that will share channel paths
   • Specify the desired channel paths as shared
   • Use the access list and candidate list of the desired shared channel path to select which LPs can access that shared channel path.
3. For each I/O device that will be on a shared channel path, you can use the I/O device’s candidate list to restrict which LPs can access that I/O device.
4. Make physical connections to the shared channel paths and the I/O devices.
5. Update the software I/O configuration for the control programs running in LPs that can access devices through shared channels.
6. Use IOCP or HCD to create an IOCDS that defines the I/O configuration, including shared channel paths, to the CPC channel subsystem. The channel subsystem includes all channel paths, control units, and I/O devices accessible by all LPs.