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Seagate Archive HDD Product Manual, Rev. C 9
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2.7.2 Conducted noise
Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the
+12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.
• Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave
injected noise at up to 10MHz.
• Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave
injected noise at up to 10MHz.
2.7.3 Voltage tolerance
Voltage tolerance (including noise):
• 5V ± 5%
• 12V +10% / -7.5%
2.8 Environmental specifications
This section provides the temperature, humidity, shock, and vibration specifications for Desktop HDDs. Ambient
temperature is defined as the temperature of the environment immediately surrounding the drive. Above 1000ft.
(305 meters), the maximum temperature is derated linearly by 1°C every 1000 ft. Refer to Section 3.4 Drive
mounting
for base plate measurement location.
2.8.1 Ambient Temperature
2.8.2 Temperature gradient
2.8.3 Humidity
2.8.3.1 Relative humidity
2.8.3.2 Wet bulb temperature
Note
Equivalent resistance is calculated by dividing the
nominal voltage by the typical RMS read/write current.
Operating 0° to 60°C (32° to 140°F)
Non-operating –40° to 70°C (–40° to 158°F)
Operating 20°C per hour (68°F per hour max), without condensation
Non-operating 30°C per hour (86°F per hour max)
Operating 5% to 90% non-condensing (30% per hour max)
Nonoperating 5% to 95% non-condensing (30% per hour max)
Operating 30°C (86°F max)
Non-operating 40°C (104°F max)