Seagate Exos 7E8 SATA Product Manual, Rev. B (Draft 2)
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2.6.4
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.
2.6.4.1
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.
2.6.4.2
Non-operating shock
The non-operating 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.
2.6.5
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.
2.6.5.1
Operating vibration
The maximum vibration levels that the drive may experience while meeting the performance standards specified in this document
are specified below.
* Rotary Random Operating Vibration
2.6.5.2
Non-operating vibration
The maximum non-operating vibration levels that the drive may experience without incurring physical damage or degradation in
performance when subsequently put into operation are specified below.
2.7
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.
)
*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
.
5–22 Hz
0.25 Gs
22–350 Hz
0.50 Gs
350–500 Hz
0.25 Gs
20 - 1500Hz
*(RROV)
12.5 rads/s
2
w/RVFF
10–500 Hz
Linear Random
4.9 Grms ref
Note
For seek mode tests, the drive is 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 l average access time
Table 4
Fluid Dynamic Bearing (FDB) motor acoustics
Idle*
Performance seek
All models
2.8 bels (typ)
3.0 bels (max)
3.2 bels (typ)
3.4 bels (max)