Shock And Vibration; Non-Operating Vibration; Acoustics - Seagate Barracuda ST2000DM008 Product Manual

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2.8.5 Shock and Vibration

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.
2.8.5.1 Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum operating shock of 80
Gs (read) / 70 Gs (write) based on half-sine shock pulses of 2ms during read operations. Shocks should not be repeated more than
two times per second.
2.8.5.2 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 350 Gs based on a non-repetitive half-sine shock pulse of
2ms duration.
2.8.5.3 Operating vibration
The maximum vibration levels that the drive may experience while meeting the performance standards specified in this document
are specified below.
10Hz to 22Hz
22Hz to 350Hz
350Hz to 500Hz
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. Throughput may vary if improperly mounted.

2.8.6 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.
5Hz to 22Hz
22Hz to 350Hz
350Hz to 500Hz
2.9

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 3 Fluid Dynamic Bearing (FDB) motor acoustics
2TB 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.
Seagate BarraCuda Product Manual, Rev. D
0.25 Gs (Limited displacement)
0.50 Gs
0.25 Gs
3.0 Gs (Limited displacement)
3.0 Gs
3.0 Gs
Idle*
2.5 bels (typical)
2.6 bels (max)
Seek
2.7 bels (typical)
2.8 bels (max)
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