Hi Arye,
sorry, I missed your question.
From your post, I assume that you already completed defining the I/O configuration in HCD for your new z16. The z/OS version does not matter. The process and the sequence of panels is the same.
Starting on the HCD main panel (CBDPM000), you enter your production IODF in the field "I/O definition file". Then select 2 "Activate or process configuration data", followed by 11 "Build and manage processor cluster IOCDSs, IPL attributes and dynamic I/O changes". This should show Processor Cluster List (CBDPACF0). In the list, enter action 's' "Work with IOCDSs" in front of your z16 processor. Be ware to be able to do this, you should have the processor definition in your IODF and your processor definition should have the SNA address (Netowrk name and CPC name) correctly specified.
Now you should be on the IOCDS List panel (CBDPCIF0) and you should see the 4 IOCDS slots A0-A3. Select an IOCDS you want to update. If it is write protected, you first need to disable write protection (action 'w'). Then update the IOCDS using action 'u' "Update IOCDS". There, you need to provide your JOB card, so that HCD can submits a Batch job for you.
This was the way for writing the IOCDS using the HCD ISPF application. You can find details in the HCD User's Guide.
This can also be done via Batch (JCL) directly. See HCD section Build an IOCDS or an IOCP input data set in the HCD User's Guide.
Independent on the way you write the IOCDS, you need to be authorized to perform that action. Assuming that you already have this permission.
If you need any additional information, please let me know.
Kind regards,
Michael Groetzner
z/OS I/O Configuration Architect