24 Barracuda 2LP Product Manual, Rev. D
To confirm that required cooling for the Barracuda electronics and HDA is
provided, place the drive in its final mechanical configuration, perform
random write/read operations, and after the temperatures stabilize, measure
the case temperature of the components listed below.
Add 15°C to the 800k MTBF case temperatures to obtain the maximum
temperature for each of the reference components. You should not operate
the drive at the maximum case temperature for extended periods of time.
Doing so will reduce product reliability.
Air-flow cooling
ST31250N and ST32550N single-ended drives
MTBF
800k hours
Card Component Reference case temperature (°C)
WYGX ADC 1 49
WYGX Detector 2 60
WYGX Microprocessor 3 55
WYGX Driver 4 57
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), plus a 5°C temperature rise in the test enclosure (35°C ambient
local to the drive).
The maximum allowable HDA case temperature is 60°C (see Figure 13).
2
3 1
4
Figure 7. WYGX temperature measurement locations
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