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Momentus Product Manual, Rev. D 5
*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.
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
(°C per hour max)
20°C (operating)
35°C (nonoperating)
Relative humidity 5% to 95% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature
(°C max)
37.7 (operating)
40 (nonoperating)
Altitude, operating –304.8 m to 3048 m (–1000 ft to 10,000
ft)
Altitude, nonoperating
(meters below mean sea level, max)
–304.8 m to 12,192 m (–1000 ft to 40,000
ft)
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 10
14
bits read
Annualized Failure Rate (AFR) 0.48%
Load/Unload (U/UL) cycles
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 10% relative humidity
55°C, 16% relative humidity
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
Warranty To determine the warranty for a specific drive, use a web browser to access the
following web page:
http://www.sea
gate.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
Serial ATA Revision 2.6 specification
Yes (requires COMRESET from host after a hotplug event)
Table 1: Drive specifications for 640, 500 and 400GB models
Drive specification ST9640322AS ST9640320AS ST9500320AS ST9400321AS