Specifications

7.8 Vibration and shock
All vibration and shock measurements in this section are made with a drive that has no mounting attach-
ments for the systems. The input power for the measurements is applied to the normal drive mounting
points.
7.8.1 Operating vibration
7.8.1.1 Random vibration
The drive is designed to operate without unrecoverable errors while being subjected to the following
vibration levels.
The measurements are carried out during 30 minutes of random vibration using the power spectral density
(PSD) levels as following.
Random vibration PSD profile breakpoints (operating)
0.560.080.081.01.08.08.01.11.10.02
Vertical
x10
3
[G
2
/Hz]
0.670.50.51.01.08.08.01.11.10.02
Horizontal
x10
3
[G
2
/Hz]
RMS
(G)
500 Hz200 Hz150 Hz65 Hz62 Hz48 Hz45 Hz17 Hz5 HzDirection
Figure 44. Random vibration PSD profile breakpoints (operating)
Overall RMS (root mean square) level of horizontal vibration is 0.67 G RMS.
Overall RMS (root mean square) level of vertical vibration is 0.56 G RMS.
NOTE: The specified levels are measured at the mounting points.
7.8.1.2 Swept sine vibration
The hard disk drive will meet the criteria shown below while operating in respective conditions.
No errors 0.5 G 0-peak, 5-300-5 Hz sine wave, 0.5 oct/min sweep rate
No data loss 1 G 0-peak, 5-300-5 Hz sine wave, 0.5 oct/min sweep rate
7.8.2 Non-operating vibrations
The drive does not sustain permanent damage or loss of recorded data after being subjected to the
environment described below.
7.8.2.1 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 simulates the shipping and relocation
environment which is shown below.
Random vibration PSD profile breakpoints (non-operating)
1.040.0010.010.010.0030.030.030.001[G
2
/Hz]
RMS (G)200 Hz70 Hz55 Hz40 Hz8 Hz4 Hz2 HzFrequency
Figure 45. Random vibration PSD profile breakpoints (non-operating)
Ultrastar 146Z10 hard disk drive specifications
41