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6.7.2.2 Swept sine vibration
19.6 m/sec2 (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
6.7.3 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 hard error occurs with a 98.1 m/sec2 (10 G) half-sine shock pulse of 11 ms duration
No hard error occurs with a 294 m/sec2 (30 G) half-sine shock pulse of 4 ms duration.
No hard error occurs with a 392 m/sec2 (40 G, write), 392 m/sec2 (40 G, read) half-sine shock pulse of 2 ms
duration
6.7.4 Nonoperating shock
The drive will operate without non-recoverable errors after being subjected to shock pulses with the following
characteristics.
6.7.4.1 Trapezoidal shock wave
Approximate square (trapezoidal) pulse shape
Approximate rise and fall time of pulse is1 ms
Average acceleration level is 490 m/sec2 (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 m/sec 6.7.4.2 Sinusoidal shock wave
The shape is approximately half-sine pulse. The figure below shows the maximum acceleration level and duration.
Table 19 Sinusoidal shock wave
Acceleration level (m/sec2)
Duration (ms)
1960(200G)
2
1470(150G)
11
6.7.5 Nonoperating Rotational shock
All shock inputs shall be applied around the actuator pivot axis.
Table 20 Rotational Shock
Duration
Rad/sec2
1 ms
30,000
2 ms
20,000
39
Hard Disk Drive Specification