Dell PowerVault 221S Rack Installation Guide - Page 10

Place a mark on the rack's front vertical rails where you want to locate the bottom - support

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www.dell.com | support.dell.com Figure 1-3. One Rack Unit 1-U (4.4 centimeters 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) For more information about requirements for installing components in a Dell rack, see the Dell Rack Advisor software available on the Dell website at http://support.dell.com. CAUTION: If you are installing more than one system, install the mounting rails 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 space between holes (marked with a horizontal line on some rack cabinets-see Figure 1-3). 1-6 Rack Installation Guide

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1-6
Rack Installation Guide
www.dell.com | support.dell.com
Figure 1-3.
One Rack Unit
For more information about requirements for installing components in a Dell rack, see the
Dell Rack Advisor software available on the Dell website at
.
CAUTION: If you are installing more than one system, install the mounting rails
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 space between
holes (marked with a horizontal line on some rack cabinets—see Figure 1-3).
1-U (4.4 centimeters 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)