Drive specification  | ST3160022A  | 
  | ST3120025A  | ST380012A  | ST360019A  | 
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Read/write power (typical)  | 12.0 watts  | 
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Idle mode (typical)  | 7.5 watts  | 
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Standby mode (typical)  | 0.9 watts  | 
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Sleep mode (typical)  | 0.9 watts  | 
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Voltage tolerance (including noise)  | 5V ± 5%  | 
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  | 12V ± 10%  | 
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Ambient temperature  | 0° to 60°C (operating)  | 
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Temperature gradient (°C per hour max)  | 20°C (operating)  | 
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  | 30°C (nonoperating)  | 
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Relative humidity  | 5% to 90% (operating)  | 
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  | 5% to 95% (nonoperating)  | 
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Relative humidity gradient  | 30% per hour max  | 
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Wet bulb temperature (°C max)  | 33 (operating)  | 
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  | 40 (nonoperating)  | 
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Altitude, operating  | 
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Altitude, nonoperating (below mean sea level,  | 
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max)  | 
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Shock, operating (Gs max at 2 msec)  | 63  | 
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Shock, nonoperating (Gs max at 2 msec)  | 350 Gs  | 
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Vibration, operating  | 1.0 G (0 to peak,   | 
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Vibration, nonoperating  | 5.0 Gs (0 to peak,   | 
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Drive acoustics Sound power (bels)  | 
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Idle*  | <2.5 (typical)  | 
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  | 2.7 (max)  | 
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Quiet seek  | 2.8 (typical)  | 
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  | 3.0 (max)  | 
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Nonrecoverable read errors  | 1 per 1014 bits read  | 
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Mean time between failures   | 600,000  | 
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Service life  | 5 Years  | 
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Contact   | 50,000  | 
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(25°C, 40% rel. humidity)  | 
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*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.
4  | U Series 9 Product Manual, Rev. D |