12 PowerEdge R420 Technical Guide
Figure 4. Internal view
Chassis features
Table 4 lists the features on the R420 chassis. For additional information, see the
Dell PowerEdge
R420 Systems Owner’s Manual
on Support.Dell.com/Manuals.
Table 4. Chassis features
Feature Description
Power button ACPI- compliant power button with an integrated green power LED
Front bezel Covers the system’s front- loading hard drives and locks for security
NMI button
Used to troubleshoot software and device driver errors; use only if directed
to do so by qualified support personnel or by the operating system's
documentation
System identification button
Buttons on the back and front of a system to help identify the unit in a data
center environment
Hard drives Up to eight 2.5- inch drives
USB connectors Connects USB devices to the server
Information tag Slide- out label panel for recording system information
Video connector Connects a monitor to the server
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