Western Digital Re EX800M, Technical Reference Manual, Page: 22 / 60

Specifications EX800M
14 RELEASED 8/13/13 2679-771339-A05
2.5.2 Temperature and Humidity
2.5.3 Temperature Measurement
Drive component temperatures measured at the drive baseplate thermocouple location must remain
within the limits specified in Table 2-5. Figure 2-3 shows the temperature measurement location.
Sustained operation at temperatures in excess of the reliability values degrades the MTBF rating. Short
excursions up to, but not exceeding, the maximum values will not affect the MTBF rating. Maximum
component temperature ratings must not be exceeded under any operating condition, or product
warranty will be void.
Table 2-5. Maximum and Reliability Operating Temperature Limits (Drive Baseplate)
Figure 2-3. Drive Base Casting Thermocouple Location
Temperature & Humidity
Operating ambient temperature
1
5
°
C to 55
°
C
Max base casting temperature
2
60
°
C
S.M.A.R.T. temperature value reported within ±3°C
Humidity 5-95% RH non-condensing
30
°
C (maximum wet bulb)
Thermal Gradient 20
°
C/hour (maximum)
Humidity Gradient 20%/hour (maximum)
Non-operating Temperature -40
°
C to 70
°
C
Humidity 5-95% RH non-condensing
35
°
C (maximum wet bulb) for up to 21 days
3
Thermal Gradient 30
°
C/hour (maximum)
Humidity Gradient 20%/hour (maximum)
1
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. The
system environment must allow sufficient air flow to limit maximum surface temperatures as defined.
2
See Figure 2-3 Actual drive case temperature should be below 60°C and within the 5-55°C operating ambient
temperature.
3
Unless still in WD’s factory sealed bag which allows up to 40
°
C without limit.
Component Location Maximum
Reliability
1
Drive baseplate See Figure 2-3 60°C (140°F) 40°C
1
Sustained operation at temperatures in excess of the reliability values degrades the MTBF rating.