Dell EMC PowerEdge R840 Installation and Service Manual

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Drive backplane

The drive backplanes supported in PowerEdge R840 are shown here:
Figure 1. 8 x 2.5-inch backplane

Back view of 8 x 2.5 inch backplane vertical

  1. miniSAS hard drive B 1
  2. miniSAS hard drive A 1
  3. Power cable connector
  4. Backplane signal connector
Figure 2. 24 x 2.5-inch (24 NVMe) backplane
This image shows the 2.5 inch (x24) SAS/SATA/NVMe (expander) backplane
  1. PCIe cable connector
  2. PCIe cable connector
  3. PCIe cable connector
  4. PCIe cable connector
  5. Backplane signal connector
  6. SAS/SATA cable connector
  7. Power cable connector
  8. Backplane signal connector
  9. Power cable connector
Figure 3. 2.5 inch (x24) SAS/SATA (expander) with universal slot for NVMe backplane
This image shows the 2.5 inch (x24) SAS or SATA (expander) + 2.5 inch (x2) rear backplane
  1. SAS cable connector A
  2. SAS cable connector B
  3. Backplane signal connector(J_BP_SIG)
  4. Power cable connector (J_PWR_A)
  5. Power cable connector (J_PWR_B)
  6. PCIe cable connector
  7. PCIe cable connector
  8. PCIe cable connector
  9. PCIe cable connector
  10. PCIe cable connector
  11. PCIe cable connector

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