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EE25.2 Series Product Manual, Rev. B
9
* One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating
environment and formatting.
** 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.
*** Typical host systems will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby
modes will not contribute to battery power consumption.
Relative humidity (noncondensing) 5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 15% per hour max
Wet bulb temperature 30°C (operating, max)
40°C (nonoperating, max)
Altitude, operating (-30°C to 85°C) –304.8 m to 5,000 m (–1000 ft to 16,400 ft)
Altitude, nonoperating (below mean sea level, max) –304.8 m to 12,192 m (–1,000 ft to 40,000 ft)
Shock, operating
at 2 msec
at 11 msec
300 Gs max
150 Gs max
Shock, nonoperating
at 2 msec
at 1 msec
at 0.5 msec
800 Gs max
900 Gs max
400 Gs max
Vibration, operating (swept sine)
(max displacement may apply below 10 hz)
2.0 G (5 - 500 Hz)
Vibration, nonoperating
(max displacement may apply below 22 hz)
5.0 Gs (0 to peak, 5–500 Hz); (X, Y, Z axis 0, 22, 45° angles)
Drive acoustics, sound power
Idle** 2.2 Bels (typical)
2.4 Bels (max)
Normal seek 2.5 Bels (typical)
2.7 Bels (max)
Performance seek 2.9 Bels (typical)
3.1 Bels (max)
Nonrecoverable read errors 1 per 10
14
bits read
Mean Time Before Failure (MTBF) 1,000,000 power-on hours
At 8,760 POH (Power On Hours) per year
Max ambient air temperature: 25°C.
Load/Unload (U/UL) cycles
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 20% relative humidity
60°C, 20% relative humidity
-30°C, 0% relative humidity
1,200,000 software-controlled power on/off cycles
100,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
20,000 hard power on/off cycles
300,000 software-controlled
100,000 hard power on/off cycles
Service life 10 years (form, fit, and function replacement)
Warranty 1 year standard (up to 5 years max with additional warranty purchase).
To determine the warranty for a specific drive, use a web browser to access the
following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You will be asked to
provide the drive serial number, model number (or part number) and country of
purchase. The system will display the warranty information for your drive.
Drive specification
ST940817AM
(Extreme)
ST940818AM
(Rugged)
ST940817SM
(Extreme)
ST940818SM
(Rugged)