User manual

Hitachi hard disk drive specifications
41
6.6.2 Nonoperating vibration
The drive does not sustain permanent damage or loss of previously recorded data after being subjected to the
environment described below
6.6.2.1 Random vibration
The test consists of a random vibration applied for each of three mutually perpendicular axes with the time
duration of 10 minutes per axis. The PSD levels for the test simulate the shipping and relocation environment
shown below. The overall RMS (Root Mean Square) level of vibration is 1.04 G.
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 23 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.