Dell PowerEdge 2650 - Manual (Page 10)

1-6 2-Post Rack Installation
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To mark the rack, perform the following steps:
1 Place a mark on the rack’s front vertical rails where you want to locate the bottom of
the system you are installing in the two-post rack.
The bottom of each 1-U space is at the middle of the narrowest metal area between
holes.
NOTE: If your rack has wide-hole spacing, go to step 3.
2 Place a mark 88 mm (3.5 inches) above the original mark you made (or count up six
holes in a rack with universal-hole spacing (see Figure 1-2).
Each 1-U (44 mm, or 1.75 inches) of vertical space on a rack with universal-hole
spacing has three holes with center-to-center spacing between holes (beginning at the
top of a 1-U space) of 0.625, 0.625, and 0.5 inches (see Figure 1-2).
NOTE: If your rack has universal-hole spacing, you have completed the procedure for
marking the rack.
3 Place a mark 88 mm (3.5 inches) above the original mark you made (or count up to the
fourth hole in the rack with wide-hole spacing (see Figure 1-3).
Each 1-U (44 mm, or 1.75 inches) of vertical space on a rack with wide-hole spacing
has two holes with center-to-center spacing between holes (beginning at the top of a
1-U space) of 31.7 mm (1.25 inches) (see Figure 1-3).
Installing the Slide Assemblies in the Rack
You can install the slide assemblies in a two-post open-frame rack having either universal-
hole spacing (see Figure 1-2) or wide-hole spacing (see Figure 1-3). You can install the 2-U
slide assemblies in either a flush-mount or center-mount configuration.
CAUTION: Do not attempt to install another system using this rack kit. Use only
the rack kit intended for your system. Using the rack kit for another system may
result in damage to the system and personal injury to yourself and to others.