Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
49
12.0 Vibration and shock
All vibration and shock measurements 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.
12.1 Operating vibration
12.1.1 Random vibration
The drive is designed to operate without unrecoverable errors while being subjected to the vibration levels defined below.
The assessments are carried out during 30 minutes of random vibration using the power spectral density (PSD) levels as fol-
lows.
No Errors:
0.4 G RMS, 5-500 Hz, flat PSD profile for each of the three mutually perpendicular axes.
No Data Loss:
1.2 G RMS, 5-500 Hz, flat PSD profile for each of the three mutually perpendicular axes.
Note:
The specified levels are measured at the mounting points.
12.1.2 Swept sine vibration
The drive will meet the criterion while operating in the respective conditions as described below.
No errors:
0.5 G 0-peak, 5-400-5 Hz sine wave, 0.5 octave/minute sweep rate
No data loss:
0.75 G 0-peak, 5-400-5 Hz sine wave, 0.5 octave/minute sweep rate
1.0 G 0-peak, 5-300-5 Hz sine wave, 0.5 octave/minute sweep rate
12.2 Non-operating vibration
The drive will not sustain permanent damage or loss of recorded data after being subjected to the environments as described
below.
12.2.1 Random vibration
The test consists of a random vibration applied for each of the three mutually perpendicular axes at a time duration of ten min-
utes per axis:
1.04 G RMS, 5-500 Hz, flat PSD profile
12.2.2 Swept sine vibration
The test consists of a swept sine vibration applied for each of the three mutually perpendicular axes.
2.0G 0-peak, 5-500-5 Hz sine wave, 0.5 octave/minute sweep rate
12.3 Operating shock
The drive will meet the criterion while operating in the respective conditions as described below.
No data loss:
15G, 11 ms duration, half sinewave shock pulse
No data loss:
30G, 2 ms duration, half sinewave shock pulse
The shock pulses of each level are applied to the drive, ten pulses for each direction and for all three mutually perpendicular
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