Seagate Barracuda ST11950N, Product Manual

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Barracuda 1 and 2 Product Manual, Rev. C 27
Air-flow cooling
ST11950WD and ST12550WD wide differential drives
MTBF
500k hours
Card Component Reference case temperature (°C)
PYGX Transmitter U5 57
PYGX Writer U35 66
PYGX LSI U4 60
PYGX VIC2 U20 59
PYGX 1021 U55 57
HDA housing Figure 11 48
The air-flow pattern with which the temperature guidelines above were
generated is shown in Figure 6 (opposite direction). Local average air
velocity was 0.61 msec (120 lfpm) and inlet air temperature to the drive was
30°C (86°F).
The maximum allowable HDA case temperature is 60°C.
U5 U35
U4 U20 U55
Figure 10. PYGX temperature measurement locations
Measure the HDA housing temperature at the location specified in Figure 11.
.50
1.00
Figure 11. Temperature measurement location