Western Digital Purple PR1334M, Technical Reference Manual

Page: 19 / 63

WD Purple PR1334M Specifications
2679-800084-A04 RELEASED 5/3/17 (WD CONFIDENTIAL) 7
2.5 Environmental Specifications
2.5.1 Shock and Vibration
Table 1. Shock and Vibration
Operating Vibration
Drives are tested by applying a random excitation in each linear axis, one axis at a
time. The drive incurs no physical damage and no hard errors while subjected to
continuous vibration not exceeding the level listed in Table 1. Operating performance
may degrade during periods of exposure to continuous vibration.
Non-Operating Vibration
Note : This specification applies to handling and transportation of unmounted drives.
Drives are tested by applying a random 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 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.
Shock
Operating 30G, 2 ms (read/write)
65G, 2 ms (read)
Non-operating (2 ms) 250G
Note: Half-sine wave, measured without shock isolation and without non-recoverable errors.
Vibration
Operating Linear: 20-300 Hz, 0.75G (0 to peak)
Random: 0.004 g
2
/Hz (10-300 Hz)
Non-operating Linear: 20-500 Hz, 4.0G (0 to peak)
Random: 0.05 g
2
/Hz (10-300 Hz)
Sweep Rate 0.5 octave/minute minimum
Rotational Vibration
12.5 rad/sec
2
based on the following PSD profile maintaining < 20% degradation:
Frequency (Hz) 20 200 300 900 1400 1500
(Rad/sec
2
)
2
/Hz
0.035 0.035 0.2 0.2 0.002 0.002
Drive Generated Vibration
Operating 0.2 gm-mm average with the drive in an unconstrained condition
Rotational Shock Non-Operating
Amplitude 20K rad/sec
2
Duration 2 ms