Nonoperating Vibration; Operating Shock; Nonoperating Rotational Shock; Table 53. Sinusoidal Shock Wave - Hitachi HDS725050KLA360 Specifications

7.6.2 Nonoperating vibration

The drive does not sustain permanent damage or loss of previously recorded data after being subjected to the envi-
ronment described below.
7.6.2.1 Random vibration
The test consists of a random vibration applied in each of three mutually perpendicular axes for a duration of 10
minutes per axis. The PSD levels for the test simulate the shipping and relocation environment shown below. The
Table 53: Random Vibration PSD profile breakpoints (nonoperating)
Frequency 2Hz
G2/Hz 0.001
overall RMS (root mean square) level of vibration is 1.04 G.
7.6.2.2 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

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 55 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
4Hz 8Hz
0.03 0.03
Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
40Hz 55Hz
0.003 0.01
60
70Hz 200Hz
0.01 0.001