The IBM z13, like its predecessors, is designed from the chip level up to support data processing. This includes a strong, fast I/O infrastructure, cache on the chip to bring data close to processing power, security and compression capabilities of the coprocessors and I/O features, and the 99.999% data availability design of the coupling technologies.
The figure below shows ten easy steps for implementing an I/O configuration for your z13. The numbered steps are described after the figure.
a. When planning to migrate to a z13, the IBM Technical Support team can help you define a configuration design that meets your needs. The configuration is then used during the ordering process.
b. The IBM order for the configuration is created and passed to the manufacturing process.
c. The manufacturing process creates a configuration file that is stored at the IBM Resource Link website. This configuration file describes the hardware being ordered. This data is available for download by the client installation team.
d. A New Order report is created that shows the configuration summary of what is being ordered along with the Customer Control Number (CCN). The CCN can be used to retrieve CFReport (a data file that contains a listing of hardware configuration and changes for a central processor complex (CPC)) from Resource Link.
Make sure that you have the current PSP Bucket installed. Also, run the SMP/E report with fix category (FIXCAT) exceptions to determine whether any Program Temporary Fixes (PTFs) must be applied. Ensure that you have the most current physical channel ID (PCHID) report and CCN from your IBM service representative. Have extra cables (fiber optic and copper) available just in case some get damaged as they are being relocated.
When you plan your configuration, consider this information:
– Naming standards
– FICON switch and port redundancy
– Adequate I/O paths to your devices for performance
– OSA Channel Path Identifier (CHPID) configuration for network and console communications
– Coupling facility connections internally and to other systems.
Because the z13 server does not support attachment to the IBM Sysplex Timer, you must consider how the z13 will receive its time source. A z13 cannot join a CTN that includes a z10 or before as a member. Since the z10 was the last server that supported the IBM Sysplex Timer (9037) connectivity, the z13 cannot be configured as a member of a mixed CTN. The z13 can only join an STP-only CTN. When you are planning to replace a z196 or zEC12 with a new z13, plan the replacement of channels that are not supported on z13. You must carefully plan how to replace those, for instance, ISC-3 to HCA3-O or ICA SR for connectivity between z13 and z13. You might need to increase CF storage size when you replace z196 or zEC12 with z13. Coupling Facility Control Code (CFCC) level 20 requirements may be different from CFCC level 19 and earlier. Use the CFSizer Tool to get the new CF storage requirements.
The existing z196 or zEC12 I/O configuration is used as a starting point for using Hardware Configuration Definition (HCD). The z196 or zEC12 production input/output definition file (IODF) is used as input to HCD to create a work IODF that becomes the base of the new z13 configuration. When the new z13 configuration is added and the obsolete hardware is deleted, a validated version of the configuration is saved in a z13 validated work IODF.
a. From the validated work IODF, create a file that contains the z13 IOCP statements. This IOCP statements file is transferred to the workstation used for the CHPID Mapping Tool (CMT). Hardware Configuration Manager (HCM) can also be used here to transfer the IOCP deck to and from the CMT.
b. The configuration file that is created by the IBM Manufacturing process in step 1d is downloaded from Resource Link to the CMT workstation. The CHPID Mapping Tool (CMT) uses the input data from the files to map logical channels to physical ones on the new z13 hardware. You might have to make decisions in response to the following situations, among others: Resolving situations in which the limitations on the purchased hardware cause a single point of failure (SPoF). You might must purchase more hardware to resolve some SPoF situations. Prioritizing certain hardware items over others.
c. After the CMT processing finishes, the IOCP statements contain the physical channels to logical channels assignment that is based on the actual purchased hardware configuration. The CHPID Mapping Tool (CMT) also creates configuration reports to be used by the IBM service representative and the installation team. The file that contains the updated IOCP statements created by the CMT, which now contains the physical channels assignment, is transferred to the host system.
d. Use HCD, the validated work IODF file created in step 5a, and the IOCP statements updated by the CMT to apply the physical channel assignments created by the CMT to the configuration data in the work IODF.
After the physical channel data is migrated into the work IODF, a z13 production IODF is created and the final IOCP statements can be generated. The installation team uses the configuration data from the z13 production IODF when the final power-on reset is done, yielding a z13 with an I/O configuration ready to be used.
IODFs that are modifying existing configurations can be tested in most cases to verify that the IODF is making the intended changes.
a. If you are upgrading an existing z196 or zEC12, you might be able to use HCD to write an IOCDS to your system in preparation for the upgrade. If you can write an IOCDS to your current system in preparation for upgrade, do so and let the IBM service representative know which IOCDS to use.
b. If the z196 or zEC12 is not network connected to the CPC where HCD is running, or if you are not upgrading or cannot write an IOCDS in preparation for the upgrade, use HCD to produce an IOCP input file. Download this input file to a USB flash drive.
The new production IODF can be applied to the z13 in these ways:
– Using the power-on reset process
– Using the Dynamic IODF Activate process
Communicating new and changed configurations to operations and the appropriate users and departments is important.
For more information refer to IBM z13 Configuration Setup.