Western Digital WDE2170, Technical Reference Manual

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Specifications WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
16
2.5.2. Temperature and Humidity
Table 2-11. Temperature and Humidity
Temperature and Humidity
Operating
1
Temperature
Humidity
Thermal Gradient
5°C to 55°C (41°F to 131°F)
10-90% RH non-condensing
33°C (maximum wet bulb)
10°C/hour (maximum)
Non-Operating
Temperature
Humidity
Thermal Gradient
-40°C to 60°C (-40°F to 140°F)
5-95% RH non-condensing
33°C (maximum wet bulb)
20°C/hour (maximum)
1
The system environment must provide sufficient air flow to limit maximum
surface temperatures as defined in Table 2-12.
2.5.3. Cooling
Drive component temperatures must remain within the limits specified in Table 2-12.
Figure 2-7 and Figure 2-8 show the temperature measurement locations. Sustained
operation at temperatures in excess of the reliability values degrades the MTBF rating.
Short excursions up to, but not exceeding, the maximum values do not affect the MTBF
rating. Maximum component temperature ratings must not be exceeded under any
operating condition. The drive may require forced air cooling to meet specified
operating temperatures.
Table 2-12. Maximum & Reliability Operating Temperature Limits
Component Location Maximum Reliability
1
Drive Baseplate #1, Figure 2-7. 65
°
C (149
°
F) 55
°
C (131
°
F)
4915 #2, Figure 2-8. 95
°
C (203
°
F) 80
°
C (176
°
F)
64C96 #3, Figure 2-8. 80
°
C (176
°
F) 65
°
C (149
°
F)
2298 #4, Figure 2-8. 80
°
C (176
°
F) 65
°
C (149
°
F)
1501 #5, Figure 2-8. 85
°
C (185
°
F) 70
°
C (158
°
F)
1
Sustained operation at temperatures in excess of the reliability values degrades the MTBF
rating.