Middle backplane cable routingFigure 496. Middle backplane signal cable routing Figure 497. Middle backplane power cable routingFrom To From To1 Backplane 5: NVMe 0-1 1 Onboard: PCIe 5 1• Backplane 5: PWR• Backplane 6: PWR1• Onboard: rearbackplane power• Onboard: rearbackplane sideband• Riser 1: PWR2 Backplane 5: NVMe 2-3 2 Onboard: PCIe 73 Backplane 6: NVMe 0-1 3 Onboard: PCIe 64 Backplane 6: NVMe 2-3 4 Onboard: PCIe 8Front + middle + rear backplanes: 12 x 3.5" SAS/SATA + 4 x 3.5" SAS/SATA + 4 x3.5"SAS/SATAThis topic provides cable routing information for the server model with one 12 x 3.5-inch SAS/SATA frontbackplane, one 4 x 3.5-inch SAS/SATA middle backplane, and one 4 x 3.5-inch SAS/SATA rear backplane.• “Onboard connectors” on page 451• “32i RAID adapter” on page 452Onboard connectorsThe following shows the cable connections for the front 12 x 3.5-inch SAS/SATA + middle 4 x 3.5-inch SAS/SATA + rear 4 x 3.5-inch SAS/SATA configuration with onboard connectors.Connections between connectors: 1 ↔ 1 , 2 ↔ 2 , 3 ↔ 3 , ... n ↔ nChapter 6. Internal cable routing 451