Image shows the layout of the servers and switches in Oracle Exadata Storage Expansion X3-2 and X4-2 Quarter Rack.
Front view, from the bottom to the top of the rack, the layout is as follows:
U1: Solid Filler
U2 - U9: Exadata Storage Servers
U10 - U19: Solid Filler
U20 - U24: Vented Filler
U25 - U42: Solid Filler
Rear view, from the bottom to the top of the rack, the layout is as follows:
U1: Empty
U2 - U9: Exadata Storage Servers
U10 - U19: Empty
U20: 36-Port IB Switch
U21: Cisco 4948
U22: 36-Port IB Switch
U23 - U42: empty