Shock; Vibration; Acoustics - Seagate Constellation ES.3 ST4000NM0033 Product Manual

2.7.4

Shock

All shock specifications assume that the drive is mounted securely with the input shock applied at the drive mounting screws. Shock
may be applied in the X, Y or Z axis.
2.7.4.1 Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum operating shock of 70 Gs
(read) and 40 Gs (write) based on half-sine shock pulses of 2ms. Shocks should not be repeated more than two times per second.
2.7.4.2 Nonoperating shock
The nonoperating shock level that the drive can experience without incurring physical damage or degradation in performance when
subsequently put into operation is 300 Gs based on a nonrepetitive half-sine shock pulse of 2ms duration.
2.7.5

Vibration

All vibration specifications assume that the drive is mounted securely with the input vibration applied at the drive mounting screws.
Vibration may be applied in the X, Y or Z axis.
2.7.5.1 Operating vibration
The maximum vibration levels that the drive may experience while meeting the performance standards specified in this document
are specified below.
5–22 Hz 0.25 Gs
22–350 Hz 0.50 Gs
350–500 Hz 0.25 Gs
20 - 1500Hz
12.5 rads/s
*(RROV)
* Rotary Random Operating Vibration
2.7.5.2 Nonoperating vibration
The maximum nonoperating vibration levels that the drive may experience without incurring physical damage or degradation in
performance when subsequently put into operation are specified below.
10–500 Hz
4.9 Grms ref
Linear Random
2.8

Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All measurements are 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.
For seek mode tests, the drive is placed in seek mode only. The number of
seeks per second is defined by the following equation:
Note
(Number of seeks per second = 0.4 / (average latency + average access time
)
Table 6 Fluid Dynamic Bearing (FDB) motor acoustics
All models
*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.
Constellation ES.3 Serial ATA Product Manual, Rev. F
2
w/RVFF
Idle*
2.8 bels (typ)
3.0 bels (max)
Performance seek
3.0 bels (typ)
3.4 bels (max)
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