Vibration And Shock; Operating Vibration - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

6.9 Vibration and Shock

All vibration and shock measurements in this section are made with the drive that has no mounting attach-
ments for the systems. The input power for the measurements is applied to the normal drive mounting
points.

6.9.1 Operating Vibration

6.9.1.1 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.
Figure 49. Random Vibration PSD Profile Breakpoints (Operating)
[ Hz] 5
Holizontal 0.02
vibration
-
×10 ³ [ G ² /Hz]
Vertical 0.02
vibration
-
×10 ³ [ G ² /Hz]
Overall RMS (root mean square) level of holizontal vibration is 0.67G RMS.
Overall RMS (root mean square) level of vertical vibration is 0.56G RMS.
Note: The specified levels are measured at the mounting points.
6.9.1.2 Swept Sine Vibration
The hard disk drive will meet the criteria shown below while operating in respective conditions.
No errors
No data loss
54
O E M Spec. of DDRS-3xxxx
Random Vibration PSD Profile Breakpoints (Operating)
17 45 48
1.1 1.1 8.0
1.1 1.1 8.0
0.5 G 0-peak, 5-300-5 Hz sine wave, 0.5 oct/min sweep rate
with 3 minutes dwells at 2 major resonances
1 G 0-peak, 5-300-5 Hz sine wave, 0.5 oct/min sweep rate
with 3 minutes dwells at 2 major resonances
62 65 150
8.0 1.0 1.0
8.0 1.0 1.0
200 500
0.5 0.5
0.08 0.08