Acer Altos R910 Series User's Manual | Page 156

Acer Servers User's Manual - Altos R910 Series.
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 Appendix A: Acer Altos R910 rack installation guide

146

Vertical mounting hole pattern

The four vertical rails of the system rack contain mounting holes 
arranged in a manner shown in the figure below: 

The system occupies 4U in the rack. Count the U positions and hole 
numbers from the bottom up.

The distance from the center of two holes with closer spacing to the 
center of the next pair is equivalent to 1U. 

Note: The unit of measurement used in this guide is "U" 
(1U = 1.75 inches or 44.45 mm). The total sum of the heights of all 
components in the rack measured in "U" cannot exceed the 
height of the rack. For more information, refer to the 
documentation that came with the system rack.

When installing components, you must start your measurement from 
the center of the two holes with closer spacing. Otherwise, the screw 
holes on the component may not match those on the rack.

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