HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
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Frequency
2 Hz
4 Hz
8 Hz
40 Hz
55 Hz
70 Hz
200 Hz
G2/Hz
0.001
0.03
0.03
0.003
0.01
0.01
0.001
Table 24
Random vibration PSD profile break points (nonoperating)
6.6.2.2
Swept sine vibration
2 G (Zero to peak), 5 to 500 to 5 Hz sine wave
0.5 oct/min sweep rate
3 minutes dwell at two major resonances
6.6.3
Operating shock
The drive meets the following criteria while operating in the conditions described below. The shock test consists
of 10 shock inputs in each axis and direction for total of 60. There must be a delay between shock pulses long
enough to allow the drive to complete all necessary error recovery procedures.
No error occurs with a 10 G half-sine shock pulse of 11 ms duration in all models.
No data loss occurs with a 30 G half-sine shock pulse of 4 ms duration in all models.
No data loss occurs with a 70 G half-sine shock pulse of 2 ms duration.
6.6.4
Nonoperating shock
The drive will operate with no degradation of performance after being subjected to shock pulses with the
following characteristics
.
6.6.4.1
Trapezoidal shock wave
Approximate square (trapezoidal) pulse shape
Approximate rise and fall time of pulse is1 ms
Average acceleration level is 50 G. (Average response curve value during the time following the 1 ms rise
time and before the 1 ms fall with a time "duration of 11 ms")
Minimum velocity change is 4.23 meters/second
6.6.4.2
Sinusoidal shock wave
The shape is approximately half-sine pulse. The figure below shows the maximum acceleration level and
duration.
Models
Accleration level (G)
Duration (ms)
1D/2D models
350
2
3D model
300
2
All models
150
11
Table 25
Sinusoidal shock wave
