Non-Operating Vibrations; Operating Shock - IBM Ultrastar 36LZX Specifications

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)
Frequency 2 Hz
2
[G /Hz] 0.001
Figure 45. Random vibration PSD profile breakpoints (non-operating)
Overall RMS (Root Mean Square) level of vibration is 1.04G (RMS).
The disk drive does not sustain permanent hardware damage or loss of previously recorded data after
being subjected to the environment described above.
7.8.2.2 Swept sine vibration
Ÿ 2 G (Zero to peak), 5 to 500 to 5 Hz sine wave
Ÿ 0.5 oct/min sweep rate
Ÿ 3 minutes dwell at two major resonances

7.8.3 Operating shock

The drive meets the following criteria:
Ÿ No data loss with 10G, 11msec half-sine shock pulse
Ÿ No data loss with 45G, 2msec half-sine shock pulse
The shock pulses of each level are applied to the drive, ten pulses for each direction and for all three
axes. There must be a minimum of 30 seconds delay between shock pulses. The input level is applied
to a base plate where the drive is attached with four screws.
4 Hz 8 Hz 40 Hz
0.03 0.03 0.003
Ultrastar 36LZX hard disk drive specifications
55 Hz 70 Hz
0.01 0.01
50
200 Hz RMS (G)
0.001 1.04