System upgrades

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The following upgrades are supported:
  • 3931 (IBM z16® (Model A01)) to 9175 (IBM z17 (Model ME1))
  • 8561 (z15®) T01 radiator-cooled model to 9175 (IBM z17 (Model ME1))
  • 8561 (z15) T01 water-cooled model to 9175 (IBM z17 (Model ME1))
  • 3931 (IBM LinuxONE Emperor 4 (Model LA1)) to 9175 (IBM LinuxONE Emperor 5 (Model ML1)
  • 8561 (IBM LinuxONE III Model LT1) to 9175 (IBM LinuxONE Emperor 5 (Model ML1)
The following upgrades are not supported:
  • 3931 (IBM LinuxONE Emperor 4 (Model LA1)) to 9175 (IBM z17 (Model ME1))
  • 8561 (IBM LinuxONE III Model LT1) to 9175 (IBM z17 (Model ME1))


An upgrade includes all frames, support cards, and new I/O features.

Important: With the four CPC drawer Maximum 208 configurable PSUs (FC 0575) offering, there is an important memory restriction in place. There is no support for MES memory upgrades within the Max208 offering that cross the memory configuration limited offering sizes (8TB, 9TB, and 10TB) based on the initial memory configuration the system was built with.