Dell PowerVault 221S (SCSI) - Manual (Page 10)

1-6 Rack Installation Guide
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F i g u r e 1 - 3 . O n e R a c k U n i t
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-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)