Universal-Hole Spacing Racks; Wide-Hole Spacing Racks - Dell PowerVault 725N Manual Del Usuario

JO525bk0.book Page 19 Monday, January 27, 2003 12:29 PM
Installing the slide assemblies in the rack
2
• Center-mount installation
• Flush-mount installation
Installing the system in the rack
3
Installing the cable-management arm
4
Routing cables
5
Marking the Rack
You must allow 1 U (44 mm, or 1.75 inch) of vertical space for each system you install in the
two-post rack.

Universal-Hole Spacing Racks

Racks with universal-hole spacing have an alternating pattern of three holes per rack unit
with center-to-center hole spacing (beginning at the top hole of a 1-U space) of 15.9 mm,
15.9 mm, and 12.7 mm (0.625 inch, 0.625 inch, and 0.5 inch) for the front and back vertical
column of holes (see Figure 1-13).
F i g u r e 1 - 1 3 .
1 U (44 mm or 1.75 inches)

Wide-Hole Spacing Racks

Racks with wide-hole spacing have an alternating pattern of two holes per rack unit with
center-to-center hole spacing (beginning at the top hole of a 1-U space) of 31.7 mm and
12.7 mm (1.25 inches and 0.5 inch) for the front and back vertical columns of holes (see
Figure 1-14).
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Tw o - P o s t , O p e n - F r a m e R e l a y R a c k U n i v e r s a l - H o l e S p a c i n g
12.7 mm (0.5 inch)
15.9 mm (0.625 inch)
15.9 mm (0.625 inch)
Rack Installation Guide
1-19