Figure 1-3. one rack unit, Figure 1-3, One rack unit -7 – Dell PowerVault 775N (Rackmount NAS Appliance) User Manual
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^ NOTE:
The vertical rails may be marked by horizontal lines and numbers in 1-U
increments. If you wish, you can make a note of the number marking on the rack's
vertical rail. It is not necessary to mark or place tape on the rack. If you choose this
method, skip ahead to the procedure "Installing the RapidRails Slide Assemblies."
Figure 1-3. One Rack Unit
1 U (44 mm or 1.75 inches)
□
□
□
□
□
12.7 mm (0.5 inch)
15.4 mm (0.625 inch)
15.4 mm (0.625 inch)
12.7 mm (0.5 inch)
/t\ CAUTION: If you are installing more than one system, install the slide assemblies
so that the first system is installed in the lowest available position in the rack.
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 rack cabinet.
The bottom of each 1-U space is at the middle of the narrowest metal area between
holes (marked with a horizontal line on some rack cabinets—see Figure 1-4).
2
Place a mark 88 mm (5.5 inches) above the original mark you made (or count up six
holes in a rack that meets EIA-510 standards) and mark the rack’s front vertical rails
with a felt-tipped pen or masking tape (if you counted holes, place a mark just above
the top hole). This mark or piece of tape indicates where the system’s upper edge will
be located on the vertical rails (see Figure 1-4).
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