Use this section to understand the SAS/SATA backplane cable routing for server model with eight 2.5-inch front drives.
To connect cables for a 7mm drive backplane, refer to 7mm drive backplane.
To connect power cables for a backplane for standard 2.5-inch or 3.5-inch drives, refer to Cable routing for backplane power.
To connect cables for M.2 drives, refer to M.2 drive backplane.
To connect signal cables for a backplane for standard 4 x 3.5-inch front drives, refer to the following cable routing scenarios depending on your server configuration:
The following illustrations and tables show the mapping relationship between backplane connectors and processor board connectors for onboard configuration.
The following figure illustrates the cable routing for the onboard configuration of 8 x 2.5-inch front SAS/SATA drive bays. Connections between connectors: 1 ↔ 1, 2 ↔ 2, 3 ↔ 3, ... n ↔ n.
Figure 1. Cable routing for onboard configuration of 8 x 2.5 SAS/SATA front drives Table 1. Mapping between one front SAS/SATA backplane and processor board for onboard configuration| Backplane | From | To |
|---|
| Front BP (SAS) | 1 SAS 0 | 1 SATA 0 |
| 2 SAS 1 | 2 SATA 1 |
Figure 2. Cable routing for onboard configuration of 8 x 2.5 SAS/SATA front drives with 2 x 2.5 rear SAS/SATA drives installed Table 2. Mapping between one front and one rear SAS/SATA backplanes and processor board for onboard configuration| Backplane | From | To |
|---|
| Front BP (SAS) | 1 SAS 0 | 1 SATA 0 |
| 2 SAS 1 | 2 SATA 1 |
| Rear BP (SAS) | 3 SAS | 3 SATA 2 |
The following illustrations and tables show the mapping relationship between backplane connectors and an 8i or 16i SFF HBA/RAID adapter (Gen 3 or Gen 4).
Figure 3. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i SFF RAID adapter (Gen 4) Table 3. Mapping between one front SAS/SATA backplane and an SFF HBA/RAID adapter| Backplane | From | To |
|---|
| Front BP (SAS) | 1 SAS 0, SAS 1 | 1 C0 |
Figure 4. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i or 16i SFF RAID adapter (Gen 3) Table 4. Mapping between one front SAS/SATA backplane and an SFF HBA/RAID adapter| Backplane | From | To |
|---|
| Front BP (SAS) | 1 SAS 0, SAS 1 | 1 C0, C1 |
Figure 5. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i or 16i SFF RAID adapter (Gen 4) with 2 x 2.5 SAS/SATA rear drives installed Table 5. Mapping between one front and one rear SAS/SATA backplanes and an SFF HBA/RAID adapter| Backplane | From | To |
|---|
| Front BP (SAS) | 1 SAS 0, SAS 1 | 1 C0 |
| Rear BP (SAS) | 2 SAS | 2 SATA 2 |
Figure 6. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i or 16i SFF RAID adapter (Gen 3) with 2 x 2.5 SAS/SATA rear drives installed Table 6. Mapping between one front and one rear SAS/SATA backplanes and an SFF HBA/RAID adapter| Backplane | From | To |
|---|
| Front BP (SAS) | 1 SAS 0, SAS 1 | 1 C0, C1 |
| Rear BP (SAS) | 2 SAS | 2 SATA 2 |
The following illustrations and tables show the mapping relationship between backplane connectors and an 8i or 16i CFF RAID adapter (Gen 3 or Gen 4).
Figure 7. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i or 16i CFF RAID adapter (Gen 3 or Gen 4) Table 7. Mapping between one front SAS/SATA backplane and a CFF RAID adapter| Backplane/adapter | From | To |
|---|
| Front BP (SAS) | 1 SAS 0 | 1 C0 |
| 2 SAS 1 | 2 C1 |
| CFF RAID adapter | 3 MB input | 3 PCIe 3 |
Figure 8. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i CFF RAID adapter (Gen 3) with 2 x 2.5 SAS/SATA drives installed Table 8. Mapping between one front and one rear SAS/SATA backplane and a CFF RAID adapter| Backplane/adapter | From | To |
|---|
| Front BP (SAS) | 1 SAS 0 | 1 C0 |
| 2 SAS 1 | 2 C1 |
| CFF RAID adapter | 3 MB input | 3 PCIe 3 |
| Rear BP (SAS) | 4 SAS (rear) | 4 SATA 2 |
Figure 9. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with a 16i CFF RAID adapter (Gen 3 or Gen 4) with 2 x 2.5 SAS/SATA drives installed Table 9. Mapping between one front and one rear SAS/SATA backplane and a CFF RAID adapter| Backplane/adapter | From | To |
|---|
| Front BP (SAS) | 1 SAS 0 | 1 C0 |
| 2 SAS 1 | 2 C1 |
| CFF RAID adapter | 3 C3 | 3 SAS (rear) |
| 4 MB input | 4 PCIe 3 |
