Seagate ST9500423AS, ST9750422AS, ST9750424AS, ST9750423ASG, ST9750420ASG Altitude, nonoperating

Table 1:	Drive specifications for 750, 640 and 500 GB models
			ST9640424AS	ST9750422AS	ST9500424AS
		ST9750423AS	ST9640423AS	ST9750420AS	ST9500423AS
Drive specification		ST9750423ASG	ST9640423ASG	ST9750420ASG	ST9500423ASG
Write power (typical)		1.85W		2.4W
Idle mode, low power (typical)		0.55W		0.70W
Standby mode (typical)		0.15W ***
Sleep mode (typical)		0.15W ***
Voltage tolerance (including noise)		+5V ± 5%
Ambient temperature		0°C to 60°C (operating)
		–40°C to 70°C (nonoperating)
Temperature gradient (°C/hour max)		20°C (operating), 35°C (nonoperating)
Relative humidity		5% to 95% (operating and nonoperating)
Relative humidity gradient		30% per hour max
Wet bulb temperature (°C max)		37.7 °C (operating), 40 °C (nonoperating)
Altitude, operating		–304.8 m to 3,048 m (–1,000 ft to 10,000+ ft)
Altitude, nonoperating		–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)
(meters below mean sea level, max)
Shock, operating (Gs max at 2 ms)		350
Shock, nonoperating (Gs max at 2 ms)		800
Shock, nonoperating (Gs max at 1 msec)		1000
Shock, nonoperating (Gs max at 0.5 ms)		1000
Vibration, operating		2.0 G (0 to peak, 5–200 Hz)
		1.0 G (0 to peak, 200–500 Hz)
Vibration, nonoperating		5 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels)
Idle**		2.3 (typical)
		2.5 (max)
Performance seek		2.6 (typical)
		2.7 (max)
Nonrecoverable read errors		1 per 1014 bits read
Annualized Failure Rate (AFR)		0.5%
Load/Unload (U/UL) cycles
25°C, 50% relative humidity		600,000 software-controlled power on/off cycles
		50,000 hard power on/off cycles
32°C, 80% relative humidity		600,000 software-controlled power on/off cycles
5°C, 80% relative humidity		50,000 hard power on/off cycles
5°C, 10% relative humidity
55°C, 16% relative humidity
Warranty		To determine the warranty for a specific drive, use a web browser to access the following
		web page: http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance
		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 dis-
		play the warranty information for your drive.
Supports Hotplug operation per		Yes (requires COMRESET from host after a hotplug event)
Serial ATA Revision 2.6 specification

*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 notebooks 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.

Momentus Product Manual, Rev. C 5