Initial definition of I/O configuration data

The following example describes the steps that an installation can use to initially define and check the I/O configuration data to prepare for the installation of a new CPC.
  1. Determine, from your physical plan, the I/O configuration requirements that must be met to install the CPC.
  2. Use HCD on a running z/OS system to define your I/O configuration for the new CPC. HCD validates the I/O configuration rules. When the definition is complete, build a production IODF.
  3. If you are installing a new CPC, do one of the following:
    • If the new CPC will be connected using a LAN to the CPC where HCD is running and that CPC is able to remotely write an IOCDS, you can use HCD to write the new IOCDS to the CPC after it is installed. HCD uses the APF-authorized ICPIOCP program to write an IOCDS. Inform the service representative which IOCDS to use.
    • If you are upgrading an existing CPC, you might be able to use HCD to write an IOCDS to your current CPC in preparation for the upgrade. See Machine rules to determine which CPCs can write an IOCDS in preparation for an upgrade and which CPCs can have ICPIOCP write an IOCDS to them. If you can write an IOCDS to your current CPC in preparation for upgrading it to a new CPC, do so and inform the service representative which IOCDS to use. This is the preferred method for writing the initial IOCDS when upgrading a CPC.
    • If the new CPC will not be connected using a LAN to the CPC where HCD is running or you are not upgrading or cannot write an IOCDS in preparation for the upgrade, use HCD to produce an IOCP input file. Download the input file to USB flash memory drive. If the file is too big to fit, compress it using a zip compatible program. Source from a USB flash memory drive must be in VFAT or DOS file format or have been compressed. Give the USB flash memory drive to the service representative, who uses this input file and stand-alone IOCP to write the IOCDS for the new CPC. Instead of a USB flash memory drive, an uncompressed IOCP source file can be imported to the SE from an FTP location by the service representative. See Creating an IOCDS in a new CPC for an example using the stand-alone version of IOCP.
      Note: See Authorizing an IOCDS write for a description of how to authorize the write of an IOCDS.
  4. The service representative performs a power-on reset of the new CPC with the appropriate IOCDS.
  5. The service representative performs an initial program load (IPL) for the z/OS system with the IODF built under Step 2.