Redefinition and replacement of I/O configuration data

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The following steps describe how your installation can replace the existing I/O configuration data on a CPC:
  1. Update the input file that contains the IOCP statements to reflect your new I/O configuration. Figure 1 contains a listing of a typical IOCP input file.
  2. Run the VM version of IOCP to check the input file you updated in Step 1. Use the NOWRTCDS options in the CMS IOCP command.
  3. Correct any errors in the IOCP statements and rerun IOCP (Step 2).
  4. Analyze the IOCP configuration reports (produced in Step 2) to ensure that the I/O configuration that you want is defined. If necessary, revise the IOCP statements and rerun IOCP (Step 2).
  6. Run the IOCP program by issuing the IOCP command with a write option WRTAx. This option writes the I/O configuration to the specified IOCDS on the Support Element. All users must have privilege class C to write. You must have privilege class B to write a dynamic-capable IOCDS.
    Note: Continue with Steps 7-12 when you want to use the new IOCDS created in Step 6. Perform these steps at a convenient time, because they disrupt installation operations.
  7. If necessary, revise the system configuration file to reflect the changes made by IOCP. The system configuration file is SYSTEM CONFIG. Figure 2 contains sample SYSTEM CONFIG statements that correspond to some of the IOCP statements in Figure 1.
  8. Generate the new VM system.
  9. Shut down VM.
  10. Perform a power-on reset of the CPC with the new IOCDS specified as the source of your configuration data. Click Disable Write Protection under Options on the Input/Output Configuration window of the Support Element.
  11. Load (IPL) VM.
  12. Test the new configuration. Follow the procedures established for your site.
  13. Save the file you used in Step 2 to provide a backup.