Recovery Appliance RA21 Rack Layout
The Figure 18-1figure shows in the minimum rack configuration in the middle, the maximum rack configuration on the right, and on the left the sequence "RA21 HC (number)" that the racks are inserted when expanding storage from the minimum RA21 HC (3) to full RA21 HC (18).
Figure 18-1 RA21 Rack Population
![RA21 layout, minimum, and full population of racks. RA21 layout, minimum, and full population of racks.](img/ra21-racklayout.png)
Figure 18-2shows the front and rear views of an Oracle Zero Data Loss Recovery Appliance RA21 full rack. The front is shown on the left, and the rear is shown on the right. The red bullet next to a component means that it is required for all Recovery Appliances.
Figure 18-2 Rack Layout of the Recovery Appliance RA21 Full Rack
![Description of Figure 18-2 follows Description of Figure 18-2 follows](img/amogd_vm_013_x9m.png)
Description of "Figure 18-2 Rack Layout of the Recovery Appliance RA21 Full Rack"
Note:
The 1U empty space at the bottom of the rack is reserved for an optional spine switch, which is used in multi-rack installations. Do not install any other unit in this space.
Figure 19-2 shows the front and rear views of a an Oracle Zero Data Loss Recovery Appliance RA21 minimum configuration.
Figure 18-3 Rack Layout of the Recovery Appliance RA21 Minimum Configuration
![Description of Figure 18-3 follows Description of Figure 18-3 follows](img/amogd_vm_003_x9m.png)
Description of "Figure 18-3 Rack Layout of the Recovery Appliance RA21 Minimum Configuration"