Redefinition and replacement of I/O configuration data

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The following example describes the steps the installation can use to replace the existing I/O configuration data on a CPC.
  1. Use HCD to update your I/O configuration for the hardware and software in a work IODF based on your currently active production IODF.
  2. Build a new production IODF from the updated work IODF.
  3. If the changes can be dynamically performed, use HCD or the z/OS Activate system command to dynamically change the I/O configuration in the Hardware System Area (HSA) and in the z/OS system. The updated IODF now becomes the new active IODF. The details of dynamic I/O reconfiguration are found in z/OS Hardware Configuration Definition Planning, GA22-7525.
  4. Write the new IOCDS to the support Element of the CPC using HCD. HCD uses IOCP to write an IOCDS. If the IOCDS slot is write protected on the Support Element, click Disable Write Protection under Options on the Input/Output Configuration window of the Support Element.
    Note: See Authorizing an IOCDS write for a description of how to authorize the write of an IOCDS.
  5. Use HCD to switch the IOCDS to become the active one for the next power-on reset.
  6. If the I/O configuration changes cannot be dynamically performed (see Step 3), perform a power-on reset of the CPC using the new IOCDS. Perform an IPL of the z/OS® system with the new production IODF.
  7. Test the new configuration following the procedures established for your site.