Seagate ST3750640NS, ST3250820NS, ST3250620NS, ST3320620NS, ST3750840NS, ST3400820NS Following web

Drive specification	ST3500630NS	ST3500830NS
Vibration, operating	5–22 Hz: 0.25 Gs, Limited displacement
	22–350 Hz: 0.50 Gs
	350–500 Hz: 0.25 Gs
Vibration, nonoperating	5–22 Hz: 0.25 Gs, Limited displacement
	22–350 Hz: 5.0 Gs
	350–500 Hz: 1.0 Gs
Drive acoustics, sound power (bels)
Idle**	2.5 (typical)
	2.8 (max)
Performance seek	3.2 (typical)
	3.5 (max)
Nonrecoverable read errors	1 sector per 1015 bits read
Annualized Failure Rate (AFR)	0.73%
Warranty	5 years on distribution units.
	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.
Contact start-stop cycles	50,000
(25°C, 50% rel. humidity)
Supports Hotplug operation per SATA II	Yes
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.

Barracuda ES Serial ATA Product Manual, Rev. D 7