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7.8.4 Non-operating shock
The drive withstands the following square shock pulse with no permanent damage:
Ÿ
Accelerating level of 50 G
Ÿ
Duration time of 11 ms
Ÿ
Rise and fall time of 1 ms
Ÿ
Minimum velocity change of 4.23ms
The drive withstands the following half-sine shock pulse:
Ÿ
No data loss with 75G, 11ms
Ÿ
No data loss with 225G, 2ms
The shocks are applied in each direction of the drive for three mutually perpendicular axes and one axis
at a time. Input levels are measured on a base plate where the drive is attached with four screws.
The drive withstands the following
Rotational Shock
:
Ÿ
No data loss with Rotational Shock 30000rad/s
2
, 1ms applied around the axis of actuator pivot.
NOTE:
Actuator is automatically locked at power-off to keep the heads on a landing zone.
Ultrastar 36LZX hard disk drive specifications
51
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