2104 Model DU3
The 2104 Model DU3 is a rack-mounted SCSI disk enclosure that can be installed
into a standard Electrical Industries Association (EIA) 19-inch rack.
A fully configured 2104 Model DU3 looks like this:
Figure 2. 2104 Model DU3 from the Front (Top) and Back (Bottom)
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2104 Models DU3 and TU3 Operator's Guide