Front + rear backplanes: 12 x 3.5" SAS/SATA + 2 x 3.5"/4 x 3.5" SAS/SATA
This topic provides cable routing information for the front 12 x 3.5-inch SAS/SATA expander backplane with a 2 x 3.5-inch/4 x 3.5-inch SAS/SATA rear backplane.
8i adapter
The following uses the 2 x 3.5-inch SAS/SATA rear backplane as an example for illustration. The cable routing for the 4 x 3.5-inch SAS/SATA rear backplane is similar.
Connections between connectors: 1 ↔ 1, 2 ↔ 2, 3 ↔ 3, ... n ↔ n
Figure 1. Front/Rear backplane signal cable routing  | Figure 2. Rear backplane power cable routing  | ||
| From | To | From | To |
| 1 Backplane 1: SAS 1 | 1 Backplane 4: SAS | 1 Backplane 4: PWR | Riser 2: PWR1, PWR2 |
| 2 Backplane 1: SAS 0 | 2 8i adapter
| ||