Seagate Barracuda ST3120022A - Manual (Page 23)

Barracuda 7200.7 Product Manual, Rev. E 13
*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.
2.12 Electromagnetic 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:
2.13 Reliability
Table 1: Fluid Dynamic Bearing (FDB) motor acoustics
Acoustic mode
Models Idle* Quiet seek Performance seek
ST3160021A
ST3160023A
ST3120022A
ST3120026A
ST380011A
ST380013A
ST360014A
<2.5 bels (typ)
2.7 bels (max)
2.8 bels (typ)
3.0 bels (max)
3.4 bels (typ)
3.7 bels (max)
ST340014A <2.2 bels (typ)
2.4 bels (max)
2.5 bels (typ)
2.7 bels (max)
3.1 bels (typ)
3.5 bels (max)
Test Description
Performance
level
Reference
standard
Electrostatic discharge Contact, HCP, VCP: ± 4 kV; Air:
± 8 kV
B EN 61000-4-2: 95
Radiated RF immunity 80 to 1,000 MHz, 3 V/m,
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse
modulation @ 200 Hz
A EN 61000-4-3: 96
ENV 50204: 95
Electrical fast transient
±
1 kV on AC mains,
±
0.5 kV on
external I/O
B EN 61000-4-4: 95
Surge immunity ± 1 kV differential, ± 2 kV com-
mon, AC mains
B EN 61000-4-5: 95
Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms,
80% AM with 1 kHz sine A EN 61000-4-6: 97
Voltage dips,interrupts 0% open, 5 seconds
0% short, 5 seconds
40%, 0.10 seconds
70%, 0.01 seconds
C
C
C
B
EN 61000-4-11: 94
Nonrecoverable read errors 1 per 10
14
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