Seagate U Series 9 CE manual Electromagnetic immunity, Reliability

Table 1: Fluid Dynamic Bearing (FDB) motor acoustics

	Acoustic mode
Models	Idle*	Quiet seek
ST3160022ACE	<2.5 bels (typ)	2.8 bels (typ)
ST3120025ACE	2.7 bels (max)	3.0 bels (max)
ST380012ACE

*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.

2.12Electromagnetic immunity

When properly installed in a representative host system, the drive operates without errors or degradation in performance when subjected to the radio frequency (RF) environments defined in the following table:

		Performance	Reference
Test	Description	level	standard
Electrostatic discharge	Contact, HCP, VCP: ± 4 kV; Air:	B	EN 61000-4-2: 95
	± 8 kV
Radiated RF immunity	80 to 1,000 MHz, 3 V/m,	A	EN 61000-4-3: 96
	80% AM with 1 kHz sine		ENV 50204: 95
	900 MHz, 3 V/m, 50% pulse
	modulation @ 200 Hz
Electrical fast transient	± 1 kV on AC mains, ± 0.5 kV on	B	EN 61000-4-4: 95
	external I/O
Surge immunity	± 1 kV differential, ± 2 kV com-	B	EN 61000-4-5: 95
	mon, AC mains
Conducted RF immunity	150 kHz to 80 MHz, 3 Vrms,	A	EN 61000-4-6: 97
	80% AM with 1 kHz sine
Voltage dips, interrupts	0% open, 5 seconds	C	EN 61000-4-11: 94
	0% short, 5 seconds	C
	40%, 0.10 seconds	C
	70%, 0.01 seconds	B

2.13	Reliability
Nonrecoverable read errors		1 per 1014 bits read, max.
Mean time between failures		600,000 power-on hours (nominal power, 25°C ambient temperature)
Contact start-stop cycles		50,000 cycles
		(at nominal voltage and temperature, with 60 cycles per hour and a 50% duty cycle)
Service Life		5 Years
Preventive maintenance		None required

12 U Series 9 ce Product Manual, Rev. F