Operating Vibration; Nonoperating Shock; Table 52. Random Vibration Psd Profile Breakpoints (Nonoperating) - Hitachi HDS725050KLA360 Specifications

7.6 Vibration and shock
All vibration and shock measurements recorded 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.

7.6.1 Operating vibration

7.6.1.1 Random vibration
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 non-recoverable errors when subjected to
the above random vibration levels.
The overall RMS (root mean square) level is 0.67 G for horizontal vibration and 0.56 G for vertical.
Table 51: Random vibration PSD
Table 52: Random vibration PSD profile break points (operating)
Direction
Horizontal x10–3
0.02
[G2/Hz
Vertical x10–3 0.02
[G2/Hz]
The overall RMS (root mean square) level is 0.67 G for horizontal vibration and 0.56 G for vertical.
7.6.1.2 Swept sine vibration
The drive will meet the criteria shown below while operating in the specified conditions:
• No errors occur with 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 data loss occurs with 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
5Hz 17Hz 45Hz
1.1 1.1
1.1 1.1
Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
48Hz 62Hz 65Hz
8.0 8.0 1.0
8.0 8.0 1.0
59
150Hz 200Hz 500Hz
1.0 0.5 0.5
1.0 0.08 0.08
RMS
(G)
0.67
0.56