Environmental Specifications; Shock And Vibration; Table 2-1 Shock And Vibration - Western Digital Blue WD20SPZX Technical Reference Manual

2.5

Environmental Specifications

2.5.1

Shock and Vibration

Table 2-1. Shock and Vibration
Shock
Operating (2 ms)
Non-operating (2 ms)
Note: Half-sine wave, measured without shock isolation and without non-recoverable errors.
Vibration
1
Operating
2
Non-operating
1
2.2 Grms, measured using random write/read ratio of 1:3 at block size of 256
2
5.8 Grms
Drive Generated Vibration
Operating (average)
Rotational Shock Non-Operating
Amplitude
Duration
Operating Vibration
Drives are tested by applying a random or swept sinusoidal excitation in each linear
axis, one axis at a time. The drive incurs no physical damage and no hard errors while
operating and subjected to continuous vibration not exceeding the level listed in
Table 2-1. Operating performance may degrade during periods of exposure to
continuous vibration.
Non-Operating Vibration
Note: This capability applies to handling and transportation of unmounted drives.
Drives are tested by applying a random or swept sinusoidal excitation in each linear
axis, one axis at a time. The drive incurs no physical damage when subjected to
continuous vibration not exceeding the level listed in Table 2-1.
Drive Generated Vibration
Drives are tested by supporting a single drive horizontally in a free-free state and
measuring the side-to-side vibration. Self vibration may not exceed the level listed in
Table 2-1.
Rotational Shock Non-Operating
Drives are tested by applying a rotational force centered around the actuator pivot.
The drive incurs no physical damage when subjected to the rotational force specified
in Table 2-1.
Packaged Shock and Vibration
The shipping packaging is designed to meet the National/International Safe Transit
Association (N/ISTA) standards for packaged products. The drive incurs no physical
damage when subjected to the N/ISTA standards.
Specifications
350G
1000G
5Hz-45Hz= 0.0011/Hz; 45Hz-500Hz= 0.0080/Hz- 0.0005/Hz
0.06984 g2/Hz, 10-500 Hz
0.20 gm-mm
2
50K rad/sec
2 ms
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