© Copyright IBM Corporation 2019, 2020, 2021. Customer Install Guide, 2U Chassis 20
• Chassis #1 - Install this 2U server (marked #1) one rack unit (1U) above the
bottom of the rack.
• Chassis #2 - Install this 2U server (marked #2) 1U above Chassis #1.
• 25G Switch - The 25G switch (marked # 3) should be installed above the top-
most server. You may install the 25G switch in any convenient location. (see
Figure 2 for recommended switch location, U25)
• 1G Switch - The 1G switch (marked # 4) should be installed above the 25G
switch. You may install the 1G switch in any convenient location. (see Figure 2
for recommended switch location, U28)
• PDUs – Install horizontally at U33/U34 for easy cable routing and service access.
Additional PDUs should be installed above the PDUs at locations U35/U36.
• Other components should be installed per the specific install guide included with
those components.
Installation Notes:
• Server nodes are preconfigured for their specific slots (1, 2, 3 & 4) in the
chassis and they must not be removed from the chassis during the chassis
installation process.
Figure 3: Node locations in chassis and chassis marking
• If you intend to expand your system, you may want to leave enough space
to install additional expansion chassis and switches at a later date. Expansion
chassis and switches are ordered separately. Expansion chassis and switches
can be racked in any order, but the preferred locations are shown in Figure 3.
• Expansion chassis are marked “EXPANSION”.
• The base system 25G switch is marked #3 and the base system 1G switch is
marked #4. Expansion switches are marked “EXPANSION”.
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