Image shows the layout of the servers and switches in Oracle Exadata Storage Expansion Half Rack with Exadata Storage Server with Sun Fire X4270 M2 Servers.
Front view, from the bottom to the top of the rack, the layout is as follows:
U1: Vented Filler
U2 - U19: Exadata Storage Servers
U20 - U22: Vented Filler
U23: KVM LCD
U24: Vented Filler
U25 - U42: Solid Filler
Rear view, from the bottom to the top of the rack, the layout is as follows:
U1: 36-Port IB Switch
U2 - U19: Exadata Storage Servers
U20: 36-Port IB Switch
U21: Cisco 4948
U22: KVM Switch
U23: KVM LCD
U24: 36-Port IB Switch
U25 - U42: empty