Data Center Basics
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14
PSU 1
PSU 2
Drives
Fans
CPUs
DIMMs (RAM)
NIC
Redundant power
1U Server
CRAH
CRAH
Row A · Row B → 12 racks each
one server (1U)
42U Rack
front (cold-aisle side)
PDU A · PDU B (two power feeds)
COLD AISLE
~18 °C intake
HOT AISLE
HOT AISLE
ToR switch on every rack
S1
S2
SPINE
storage racks
SSD + HDD arrays
Electrical Room
— + — + — +
— + — + — +
— + — + — +
— + — + — +
UPS
Switch-
gear
GEN 1
GEN 2
GEN 3
Diesel · 72 h
2N power: A + B paths
N+1 cooling
N+1 generators
+1
+1
UPTIME
TIER III
99.98%
MEET-ME
ROOM
carriers
cross-connect
patch panel
NOC
24/7 ops
SECURITY
mantrap
biometric
Chiller Plant
chillers · pumps · CT
WHITE SPACE (data hall)
— building shell · fire detection (VESDA) · clean-agent suppression —
Layer 1 of 14
The Server
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