1.9
Drive acoustics
Drive acoustics are measured as overall A-weighted acoustic sound
power levels (no pure tones). All measurements are generally consistent
with ISO document 7779. Sound power measurements are taken under
essentially free-field conditions over a reflecting plane. For all tests, the
drive is oriented with the cover facing upward.
Mode
Typical sound
power (bels)
Maximum sound
power (bels)
Idle
3.7
4.1
Read/Write
4.4
4.7
1.10 Electromagnetic susceptibility
The drive operates without errors when subjected to the following:
Radiated noise
≤
3 volt/meter, 30 Hz to 500 MHz
Electrostatic discharge*
≤
10 KVolts
Magnetic field strength
≤
5 Gauss
* Electrostatic discharge susceptibility is measured with the drive
mounted in a representative computer system (mounted to a ground
plane with earth grounding). Discharges are applied to the bezel or
other external surfaces on the ground plane.
1.11 Reliability
Nonrecoverable read errors
1 per 10
14
bits read, max
Mean time between failures
300,000 power-on hours
(nominal power, 25°C ambient
temperature)
Contact start-stop cycles
40,000 cycles
(at nominal voltage and temperature,
with 60 cycles per hour and a 40%
duty cycle)
Preventive maintenance
None required
14
Medalist 6540, 5130 and 3220 Product Manual, Rev. A
