Seagate ST980818AM Drive specification, ST940817AM, ST940818AM, ST940817SM, ST940818SM, Extreme

Drive specification	ST940817AM	ST940818AM	ST940817SM	ST940818SM
	(Extreme)	(Rugged)	(Extreme)	(Rugged)
Temperature gradient	20°C/hour (operating)
(noncondensing)	30°C/hour (nonoperating)
Relative humidity (noncondensing)	5% to 90% (operating)
	5% to 95% (nonoperating)
Relative humidity gradient (noncondensing)	30% per hour max
Wet bulb temperature	30°C (operating, max)
	40°C (nonoperating, max)
Altitude, operating (Extreme models: -30°C to 85°C)	–304.8 m to 5,500 m (–1000 ft to 18,100 ft)
Altitude, operating (Rugged models: -20°C to 75°C)
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	300 Gs max
at 11 msec	150 Gs max
Shock, nonoperating
at 2 msec	800 Gs max
at 1 msec	900 Gs max
at 0.5 msec	400 Gs max
Vibration, operating (linear swept sine)	2.0 G (0 to peak, 5–500 Hz); (X, Y, Z axis, 45° angles)
(max displacement may apply below 10 hz)
Vibration, nonoperating (linear swept sine)	5.0 Gs (0 to peak, 5–500 Hz); (X, Y, Z axis, 45° angles)
(max displacement may apply below 22 hz)
Vibration, operating (linear random)	.003 G2/hz (5–500 Hz); (X, Y, Z axis, 45° angles)
Vibration, nonoperating (linear random)	.025 G2/Hz, 3.5 Grms (5–500 Hz); (X, Y, Z axis, 45° angles)
Drive acoustics, sound power
Idle**	1.7 Bels (typical)
	1.9 Bels (max)
Seek	1.9 Bels (typical)
	2.1 Bels (max)
Nonrecoverable read errors	1 per 1014 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	1,200,000 software-controlled power on/off cycles
	100,000 hard power on/off cycles
-30°C, 0% relative humidity (extreme models)	300,000 software-controlled
85°C, 20% relative humidity (extreme models)	100,000 hard power on/off cycles
-20°C, 0% relative humidity (rugged models)	300,000 software-controlled
75°C, 20% relative humidity (rugged models)	100,000 hard power on/off cycles
Service life	10 years (form, fit, and function replacement)
Warranty	To determine the warranty for a specific drive, use a web browser to
	access the follow-ing web page:
	support.seagate.com/customer/warranty_validation.jsp
	You will be asked to provide the drive serial number, model number (or
	part number) and country of purchase.
	After submitting this information, the system will display the warranty
	information for your drive.

*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.

EE25.2 Series Product Manual, Rev. E 9