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 immunityWhen properly installed in a representative host system, the drive ope rates without errors or degrad ation in
performance when subjected to the radio frequency (RF) environments defined in the following table:
2.13 ReliabilityTable 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 BEN 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
AEN 61000-4-3: 96
ENV 50204: 95
Electrical fast transient ± 1 kV on AC mains, ± 0.5 kV on
external I/O BEN 61000-4-4: 95
Surge immunity ± 1 kV differential, ± 2 kV com-
mon, AC mains BEN 61000-4-5: 95
Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms,
80% AM with 1 kHz sine AEN 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 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 requir ed