Deskstar T7K500 Hard Disk Drive Specification
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7.6.3 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 in all models.
7.6.4 Nonoperating shock
The drive will operate with no degradation of performance after being subjected to shock pulses with the following
characteristics.
7.6.4.1 Trapezoidal shock wave
• Approximate square (trapezoidal) pulse shape
• Approximate rise and fall time of pulse is 1 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 per second
7.6.4.2 Sinusoidal shock wave
The shape is approximately half-sine pulse. The figure below shows the maximum acceleration level and duration.
7.6.5 Nonoperating rotational shock
All shock inputs shall be applied around the actuator pivot axis.
Table 46: Rotational shock
Table 45: Sinusoidal shock wave
Models Acceleration level (G) Duration (ms)
2 disk 350 2
3 disk 300 2
All models 150 11
Duration Rad/s
2
1 ms 30,000
2 ms 20,000
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