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DB35.4 Series SATA Product Manual, Rev. C 11
2.9 Environmental specifications
2.9.1 Drive case temperature
Above 1,000 feet (305 meters), the maximum temperature is derated linearly to 112°F (44°C) at 10,000 feet
(3,048 meters).
Drive case temperature should be measured at the location indicated in Figure 5 on page 19.
* Ambient temperature is defined as the temperature of the environment immediately surrounding the drive.
2.9.2 Temperature gradient
2.9.3 Humidity
2.9.3.1 Relative humidity
2.9.3.2 Wet bulb temperature
2.9.4 Altitude
2.9.5 Shock
All shock specifications assume that the drive is mounted securely with the input shock applied at the drive
mounting screws. Shock may be applied in the X, Y or Z axis.
2.9.5.1 Operating shock
The drives comply with the performance levels specified in this document when subjected to a maximum oper-
ating shock of 63 Gs based on half-sine shock pulses of 2 msec. Shocks should not be repeated more than
two times per second.
2.9.5.2 Nonoperating shock
The nonoperating shock level that the drive can experience without incurring physical damage or degradation
in performance when subsequently put into operation is 350 Gs based on a nonrepetitive half-sine shock pulse
of 2 msec duration.
Operating (Drive case temperature) 0° to 75°C (32° to 167°F)
Nonoperating (Ambient *) –40° to 70°C (–40° to 158°F)
Operating: 20°C per hour (68°F per hour max), without condensation
Nonoperating: 30°C per hour (86°F per hour max)
Operating: 5% to 90% noncondensing (30% per hour max)
Nonoperating: 5% to 95% noncondensing (30% per hour max)
Operating: 37.7°C (99.9°F max)
Nonoperating: 40.0°C (104°F max)
Operating: –60.96 m to 3,048 m (–200 ft. to 10,000+ ft.)
Nonoperating: –60.96 m to 12,192 m (–200 ft. to 40,000+ ft.)