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Ra c k I n s t a l l a t i o n G u i d e 1-7
F i g u r e 1 - 3 . O n e R a c k U n i 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 44 mm (1.75 inches) above the original mark you made (or count up
three holes in a rack that meets EIA-310 standards) and mark the rack's front vertical
rails with a felt-tipped marker 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).
1 U (44 mm or 1.75 inches)
12.7 mm (0.5 inch)
15.9 mm (0.625 inch)
15.9 mm (0.625 inch)
12.7 mm (0.5 inch)
JO525bk0.book Page 7 Monday, January 27, 2003 12:29 PM