Drive Acoustics - Seagate ST320014A Product Manual

ST320014A Product Manual, Rev. B
1.8.6.1 Operating vibration
The following table lists the maximum vibration levels that the drive may
experience while meeting the performance standards specified in this
document.
5–21 Hz
22–350 Hz
351–500 Hz
1.8.6.2 Nonoperating vibration
The following table lists the maximum nonoperating vibration that the
drive may experience without incurring physical damage or degradation
in performance when subsequently put into operation.
5–21 Hz
22–350 Hz
351–500 Hz

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 were taken
under essentially free-field conditions over a reflecting plane. For all
tests, the drive was oriented with the cover facing upward.
Note. For seek mode tests, the drive was placed in seek mode only.
The number of seeks per second is defined by the following
equation:
Number of seeks per second = 0.4 / (average latency + average access time)
ST320014A
Acoustic mode
Sound power (bels)
0.02-inch displacement (peak to peak)
0.5 Gs acceleration (zero to peak)
0.25 Gs acceleration (zero to peak)
0.2-inch displacement (peak to peak)
5.0 Gs acceleration (zero to peak)
1.0 Gs acceleration (zero to peak)
Idle
2.6 (typ)
2.8 (max)
Seek
2.7 (typ)
2.9 (max)
11