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2.9Environmental specifications
2.9.1Ambient temperature
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. Actual drive case temperature should not exceed 75°C (167°F) within the operating ambient conditions. Rec- ommended measurement locations are shown in Figure 5 on page 27.
Above 1,000 feet (305 meters), the maximum temperature is derated linearly to 112°F (44°C) at 10,000 feet (3,048 meters).
Operating: |
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ST3320820SCE, ST3300820SCE and ST3250820SCE | 0° to 65°C (32° to 149°F) |
ST3500830SCE and ST3400820SCE | 0° to 62°C (32° to 143.6°F) |
ST3750640SCE and ST3750840SCE | 0° to 60°C (32° to 140°F) |
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Nonoperating: | |
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2.9.2Temperature gradient
Operating: | 20°C per hour (68°F per hour max), without condensation |
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Nonoperating: | 30°C per hour (86°F per hour max) |
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2.9.3Humidity
2.9.3.1Relative humidity
Operating: | 5% to 90% noncondensing (30% per hour max) |
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Nonoperating: | 5% to 95% noncondensing (30% per hour max) |
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2.9.3.2Wet bulb temperature
Operating: | 37.7°C (99.9°F max) |
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Nonoperating: | 37.7°C (99.9°F max) |
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2.9.4Altitude
Operating: | |
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Nonoperating: | |
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2.9.5Shock
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.
2.9.5.1Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum operating shock of 63 Gs based on
18 | DB35.3 Series Serial ATA Product Manual, Rev. D |