Ultrastar 7K2
HGST Hard Disk Drive Technical Reference Manual
16
Environmental Specifications
Shock and Vibration
Table 3 Device/Head Register
Shock
Operating
30G, 2 ms read/write)
65G, 2 ms (read)
Non-operating (2 ms) 300G
Note: Half-sine wave, measured without shock isolation and without non-recoverable errors.
Rotational Shock Non-Operating
Amplitude
20K rad/sec
2
Duration
2 ms
Vibration
Operating
Swept Sine: 20-300 Hz, 0.75G (0 to peak)
Sweep Rate: 0.5 octave/minute minimum
Random: 0.004 g
2
/Hz (10-300 Hz)
Non-operating
Swept Sine: 20-500 Hz, 4.0G (0 to peak)
Sweep Rate: 0.5 octave/minute minimum
Random: 0.05 g
2
/Hz (10-300 Hz)
Rotational Vibration
12.5 rad/sec
2
based on the following PSD profile maintaining <20% performance degradation:
Frequency (Hz)
20
200
300
900
1400
2000
(Rad/sec
2
)
2
/Hz
0.035
0.035
0.2
0.2
0.002
0.002
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 3 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 3.
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.
