The external disk or disks, depending on how many you ordered, come mounted in a disk cabinet. To familiarize yourself with the external disk cabinet the following illustration shows the location of the switches, indicators, and connectors for the disk cabinet (also known as a disk drive cabinet).
The figure above shows an external disk cabinet containing three disk drives. To determine the number of disk drives in your external disk cabinet, count the indicator lights (located on the right side of each disk drive).