Seagate ST9400321AS, ST9640320AS, ST9640322AS, ST9500320AS manual To 12,192 m -1000 ft to 40,000 ft

Table 1:	Drive specifications for 640, 500 and 400GB models
Drive specification		ST9640322AS	ST9640320AS	ST9500320AS	ST9400321AS
Seek power (typical)		1.3W
Read/write power (typical)		Read: 1.25W; Write: 1.65W
Idle mode, low power (typical)		0.47W
Standby mode		0.12W (typical)***
Sleep mode		0.12W (typical)***
Voltage tolerance (including noise)		+5V ± 5%
Ambient temperature		0° to 60°C (operating), –40° to 70°C (nonoperating)
Temperature gradient		20°C (operating)
(°C per hour max)		35°C (nonoperating)
Relative humidity		5% to 95% (operating)
		5% to 95% (nonoperating)
Relative humidity gradient		30% per hour max
Wet bulb temperature		37.7 (operating)
(°C max)		40 (nonoperating)
Altitude, operating		–304.8 m to 3048 m (–1000 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 2ms)		350
Shock, nonoperating (Gs max at 1ms)		1000
Shock, nonoperating (Gs max at 0.5ms)		1000
Vibration, operating		1.0 G (0 to peak, 5–500 Hz)
Vibration, nonoperating		5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels)
Idle**		2.3 (typical)
		2.5 (max)
Seek		2.4 (typical)
		2.6 (max)
Nonrecoverable read errors		1 per 1014 bits read
Annualized Failure Rate (AFR)		0.48%
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
		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.
Supports Hotplug operation per		Yes (requires COMRESET from host after a hotplug event)
Serial ATA Revision 2.6 specification

*One GB 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. D 5