A customer has two z14 CPCs and a z14 ZR1 standalone coupling facility, all at the latest driver level. They have discovered the ICA links between the z14 and the z14 ZR1 are at capacity and…

Question

Options

• AThe z14 and z14 ZR1 support dynamic I/O and no outage is required.
• BAn outage is required for the z14 and z14 ZR1 for I/O definitions.
• CThe z14 supports dynamic I/O but the z14 ZR1 requires an outage.
• DThe z14 ZR1 supports dynamic I/O but the z14 requires an outage.

• A
  72% (18)
• B
  16% (4)
• C
  4% (1)
• D
  8% (2)

Explanation

Both the z14 and z14 ZR1 fully support Dynamic I/O, which allows I/O definitions - including new ICA channel paths - to be added, modified, or activated without requiring an IPL (system restart/outage). Because dynamic I/O applies to both systems, the additional links can be configured and activated immediately, making option A the valid solution.

Option B is wrong because it overstates the requirement: no outage is needed for either system when using dynamic I/O. Options C and D are wrong for the same fundamental reason - they incorrectly suggest one of the two systems lacks dynamic I/O support. The z14 ZR1 is simply a rack-optimized form factor of the z14; it retains all the same I/O capabilities, including dynamic I/O, so there is no functional asymmetry between the two.

Memory tip: Think of the ZR1 as "z14 in a rack" - the R stands for Rack, not Reduced-capability. Any feature the z14 has, the z14 ZR1 also has. When you see a question that implies one z14 variant can do something the other cannot, that's almost always a distractor.

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