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6.7 Vibration and shock
All vibration and shock measurements recorded in this section are made with a drive that has no mounting
attachments for the systems. The input power for the measurements is applied to the normal drive mounting points.
6.7.1 Operating vibration
6.7.1.1 Random vibration (Linear)
The test is 30 minutes of random vibration using the power spectral density (PSD) levels shown below in each of
three mutually perpendicular axes. The disk drive will operate without a hard error when subjected to the below
random vibration levels.
Table 16 Random vibration PSD profile break points (operating)
Frequency
5 Hz
17 Hz
45 Hz
48 Hz
62 Hz
65 Hz 150 Hz 200 Hz 500 Hz
RMS
(m/sec2)
[(m/sec2)2/Hz]
2.1 x
10E–3
1.2 x
10E–1
1.2 x
10E–1
8.4 x
10E–1
8.4 x
10E–1
1.0 x
10E–1
1.0 x
10E–1
5.2x
10E–2
5.2 x
10E-2
6.86
The overall RMS (root mean square) level is 6.86 m/sec2 (0.7 G).
6.7.1.2 Swept sine vibration (Linear)
The drive will meet the criteria shown below while operating in the specified conditions:
No hard error occurs with 4.9 m/sec2 (0.5 G) 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with
3-minute dwells at two major resonances.
No hard error occurs with 9.8 m/sec2 (1 G) 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with
3-minute dwells at two major resonances.
6.7.1.3 Random vibration (Rotational)
The drive will meet the criteria shown below while operating in the specified conditions:
Less than 10% Performance degradation
The overall RMS (Root Mean Square) level of vibration is 12.5Rad/sec2. PSD profile is shown below.
Table 17 Random vibration (Rotational) PSD profile break points
Frequency
20 Hz
100 Hz
200 Hz
800 Hz
1000 Hz
1500 Hz
1700 Hz
2000 Hz
RMS
(Rad/s2)
[(Rad/s2) 2/Hz]
1.90E -02
1.90E -02
1.87E -01
1.87E -01
5.33E -02
7.70E -03
4.00E -03
4.00E -03
12.5
6.7.2 Nonoperating vibration
The drive does not sustain permanent damage or loss of previously recorded data after being subjected to the
environment described below.
6.7.2.1 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 10.2 m/sec2 (1.04 G).
Table 18 Random vibration PSD profile break points (nonoperating)
Frequency
2 Hz
4 Hz
8 Hz
40 Hz
55 Hz
70 Hz
200 Hz
[(m/sec2)2/Hz]
0.096
2.89
2.89
0.289
0.962
0.962
0.096
38
Hard Disk Drive Specification