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8 x 2.5'' SAS/SATA backplane (one processor)

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:

Cable routing for onboard 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
BackplaneFromTo
Front BP (SAS)1 SAS 01 SATA 0
2 SAS 12 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
BackplaneFromTo
Front BP (SAS)1 SAS 01 SATA 0
2 SAS 12 SATA 1
Rear BP (SAS)3 SAS3 SATA 2

Cable routing with an SFF HBA/RAID adapter​

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 or 16i SFF RAID adapter (Gen 4)

Table 3. Mapping between one front SAS/SATA backplane and an SFF HBA/RAID adapter
BackplaneFromTo
Front BP (SAS)1 SAS 0, SAS 11 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
BackplaneFromTo
Front BP (SAS)1 SAS 0, SAS 11 C0, C1
Figure 5. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i 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
BackplaneFromTo
Front BP (SAS)1 SAS 0, SAS 11 C0
Rear BP (SAS)2 SAS2 SATA 2
Figure 6. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i SFF RAID adapter (Gen 3) with 2 x 2.5 SAS/SATA rear drives installed

Table 6. Mapping between one front SAS/SATA backplane and an SFF HBA/RAID adapter
BackplaneFromTo
Front BP (SAS)1 SAS 0, SAS 11 C0, C1
Rear BP (SAS)2 SAS2 SATA 2

Cable routing with a CFF RAID adapter​

The following illustration and table show the mapping relationship between backplane connectors and an 8i or 16i CFF RAID adapter (Gen 3).

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)

Table 7. Mapping between one front SAS/SATA backplane and a CFF RAID adapter
Backplane/adapterFromTo
Front BP (SAS)1 SAS 01 C0
2 SAS 12 C1
CFF RAID adapter3 MB input3 PCIe 2

The following illustration and table show the mapping relationship between backplane connectors and an 8i CFF RAID adapter (Gen 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/adapterFromTo
Front BP (SAS)1 SAS 01 C0
2 SAS 12 C1
CFF RAID adapter3 MB input3 PCIe 2
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/adapterFromTo
Front BP (SAS)1 SAS 01 C0
2 SAS 12 C1
CFF RAID adapter3 C33 SAS (rear)
4 MB input4 PCIe 2