Installation Tasks; Marking The Rack; Universal-Hole Spacing Racks - Dell PowerEdge 300 Installationsanleitung

Installation Tasks

Installing a two-post rack kit includes performing the following tasks in order:

1 Marking the rack

• Universal-hole spacing rack
• Wide-hole spacing rack
2 Installing the mounting rails in the rack
• Center-mount installation
• Flush-mount installation
3 Installing the system in the rack
4 Routing cables
Marking the Rack
You must allow 1 U (44 mm, or 1.75 inch) of vertical space for each system that 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 2-2).
Figure 2-2. Two-Post, Open-Frame Relay Rack Universal-Hole Spacing
1 U (44 mm or 1.75 inches)
30
Two-Post Rack Installation
12.7 mm (0.5 inch)
15.9 mm (0.625 inch)
15.9 mm (0.625 inch)