The image shows the back panel of Oracle Database Appliance X5-2. Node 1 is at the top of the image. Node 0 is under Node 1. The storage shelf is under Node 0. The expansion storage shelf is under the storage shelf. . There are eight callouts. Callouts 1 through 4 are at the top of the image. Callouts 3 and 4 are at the bottom of the image. The table describing the function of each callout is located under the figures in this topic.