SXM5 PCIe switch board configuration

Use the section to understand the 2.5-inch drive backplane cable routing for the server configuration with SXM5 PCIe switch board.

Note

Make sure the backplane cables are placed underneath the cables that are connected to the SXM5 PCIe switch board.
Make sure the cables that go through the right side of the server are routed under the radiator bracket as illustrated.
Make sure the backplane power cable is routed above the radiator bracket as illustrated.

Choose the routing plan depending on if the RAID adapter is installed in the system or not.

Without RAID adapter

Figure 1. 2.5-inch drive backplane cable routing

Cable	From	To
`1`	Backplane: Power connector	System board assembly: Backplane power connector
`2`	Backplane: NVMe 0-1	SXM5 PCIe switch board: MCIO connector C
`3`	Backplane: NVMe 2-3	SXM5 PCIe switch board: MCIO connector A

Note

For the configuration with RAID adapter on the PCIe riser 1: after connecting cables, use the cable tie that is near the front of the chassis to secure the two cables to the RAID adapter.
For the configuration with RAID adapter on the PCIe riser 2: after connecting cables, equally divide the cables that go through the right side of the front drive tray into two bundles, and secure them with the two cable ties.

Figure 2. Securing cables with cable tie(s)

Based on the location of the RAID adapter, select the corresponding routing path from the following table.

RAID adapter on the PCIe riser 2	RAID adapter on the PCIe riser 1
Figure 3. 2.5-inch drive backplane cable routing (RAID adapter on the PCIe riser 2)	Figure 4. 2.5-inch drive backplane cable routing (RAID adapter on the PCIe riser 1)

Cable	From	To
`1`	Backplane: Power connector	System board assembly: Backplane power connector
`2`	Backplane: NVMe 0-1	16i RAID adapter installed on the PCIe riser 1 or 2: C0
`3`	Backplane: NVMe 2-3	16i RAID adapter installed on the PCIe riser 1 or 2: C1

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