A z13s customer is excited about the prospect of acquiring a z14 ZR1. They are very interested in the 16U Reserved component space within the z14 ZR1 CPC. Which of the following is a limiting factor…

Question

Options

• AA maximum of two I/O drawers can be ordered.
• BThe space is reserved for the IBM DS8882F.
• CTop Exit I/O cannot be ordered.
• DNo three phase power is available.

• A
  8% (2)
• B
  12% (3)
• C
  4% (1)
• D
  76% (19)

Explanation

Option D is correct because the z14 ZR1 is architected exclusively for single-phase power - three-phase power is simply not available in this rack-optimized form factor. This directly limits what can be installed in the 16U Reserved space, since components requiring three-phase power cannot be supported there, making it a hard constraint when sizing or proposing a solution.

Option A is wrong because I/O drawer limits are not what restricts the 16U Reserved feature - that's a separate configuration constraint unrelated to the reserved space. Option B is wrong because the 16U Reserved space is not designated exclusively for the DS8882F storage system; it's general-purpose reserved rack space. Option C is wrong because Top Exit I/O cabling options are a separate ordering consideration and do not limit the 16U Reserved feature specifically.

Memory tip: Associate "ZR1" with "rack" - rack environments typically run on single-phase power, so anything that needs three-phase power simply won't fit the ZR1's power model, making power (not space, cables, or specific hardware reservations) the key gating factor.

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