Seagate ST3400820NS, ST3250820NS, ST3250620NS manual Barracuda ES Serial ATA Product Manual, Rev. D

Drive specification	ST3400620NS	ST3400820NS
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 9