Usb Peripherals - Dell PowerEdge R220 Technical Manual

The adjustment range of the rails is a function of the type of rack in which they are being mounted.
The min-max values listed above represent the allowable distance between the front and rear
mounting flanges in the rack. Rail depth represents the minimum depth of the rail as measured from
the rack front mounting flanges when the rail rear bracket is positioned all the way forward.

USB peripherals

The PowerEdge R220 supports the following USB-based peripherals:

USB key (Bootable)

Keyboard (1)

Mouse (1)

Optional USB DVD-ROM
41 Dell PowerEdge R220 Technical Guide