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2.5-inch drive backplane cable routing

Use the section to understand the cable routing for the 2.5-inch drive backplane.

Based on the location of the drive backplane, select the corresponding routing plan:
After you finish cable routing, bundle the cables with cable ties corresponding to their location:
Note
  • Connections between connectors; 1↔1, 2↔2, 3↔3, ... n↔n
  • When routing the cables, ensure that all cables are routed appropriately through the cable guides.

Front 2.5-inch drive backplane cable routing​

Figure 1. Front 2.5-inch drive backplane signal cable routing
Front 2.5-inch drive backplane signal cable routing
CableFromToLabel
1Backplane 1: NVMe connector 0-1PCIe switch board: NVMe connector 1 (NVME1)
  • NVME 0-1
  • NVME 1
2Backplane 1: NVMe connector 2-3PCIe switch board: NVMe connector 3 (NVME3)
  • NVME 2-3
  • NVME 3
3Backplane 2: NVMe connector 0-1PCIe switch board: NVMe connector 5 (NVME5)
  • NVME 0-1
  • NVME 5
4Backplane 2: NVMe connector 2-3PCIe switch board: NVMe connector 7 (NVME7)
  • NVME 2-3
  • NVME 7
Note


Press the 2.5-inch drive backplane signal cables down onto the board to keep them away from the heat sinks.
Figure 2. Front 2.5-inch drive backplane power cable routing
Front 2.5-inch drive backplane power cable routing
CableFromToLabel
1Backplane 1: Power connectorPower distribution board: Backplane 1 power connector (BP1 PWR)
  • BP1 PWR
  • BP1 PWR
2Backplane 2: Power connectorPower distribution board: Backplane 2 power connector (BP2 PWR)
  • BP2 PWR
  • BP2 PWR
Note
Route the 2.5-inch drive backplane power cables through the GPU cable holder as illustrated.

Rear 2.5-inch drive backplane cable routing​

Figure 3. Rear 2.5-inch drive backplane cable routing
Rear 2.5-inch drive backplane cable routing
CableFromToLabel
1Backplane : NVMe connector 2-3System board: MCIO connector 4B (MCIO4B)
  • R-NVME 2-3
  • MCIO 4B
2Backplane : Power connectorSystem board: Backplane power connector (BP PWR/SIG 2)
  • R-BP PWR
  • SIG 2
3Backplane : NVMe connector 0-1System board: MCIO connector 4A (MCIO4A)
  • R-NVME 0-1
  • MCIO 4A

After you finish

Figure 4. Securing cables with cable ties
Securing cables with cable ties

Bundle cables on the front drive backplane side​

Divide the drive backplane signal and power cables, GPU management cable, front I/O module cables, and integrated diagnostics panel cable into four bundles, and secure them with cable ties as illustrated.


BundleCableConnector
1
  • One integrated diagnostics panel cable
  • Integrated diagnostics panel
2
  • Two backplane 1 signal cables
  • One backplane 1 power cable
  • Backplane 1: NVMe connector 0-1
  • Backplane 1: Power connector
  • Backplane 1: NVMe connector 2-3
3
  • Two backplane 2 signal cables
  • One backplane 2 power cable
  • One GPU management cable
  • Backplane 2: NVMe connector 0-1
  • Backplane 2: NVMe connector 2-3
  • Backplane 2: Power connector
  • From PCIe switch board: GPU management connector (MGMT)
4
  • One GPU management cable
  • Two front I/O module cables
  • To system board: PCIe switch sideband connector (PCIE SW SIDEBAND)
  • Front I/O module

Bundle cables connected to the PCIe switch board​

Divide the cables connected to the PCIe switch board into six bundles, and secure them to the crossbar with cable ties.


BundleCableConnector (on PCIe switch board)
1
  • One PCIe switch board power cable
  • One PCIe switch board sideband cable
  • PDB PWR1
  • PDB SB1
2
  • One backplane 1 signal cable
  • Two PCIe switch board signal cables
  • NVME1
  • MCIO1
  • MCIO2
3
  • One backplane 1 signal cable
  • Two PCIe switch board signal cables
  • NVME3
  • MCIO3
  • MCIO4
4
  • One backplane 2 signal cable
  • Two PCIe switch board signal cables
  • NVME5
  • MCIO5
  • MCIO6
5
  • One backplane 2 signal cable
  • Two PCIe switch board signal cables
  • NVME7
  • MCIO7
  • MCIO8
6
  • One PCIe switch board power cable
  • One PCIe switch board sideband cable
  • PDB PWR2
  • PDB SB2