Dell PowerEdge R940 Installation and Service Manual

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Drive backplane connectors

Depending on the configuration, your system supports the following backplanes:
Table 1. Supported drive backplane options for the PowerEdge R940 system

This table lists out the supported drive backplanes for the PowerEdge R940 system:

BackplaneDescription
8 x 2.5 inch drive backplaneUp to eight 2.5 inch (SAS, SATA or Nearline SAS) front accessible drives in slots 0 through 7
24 x 2.5 inch drive backplaneUp to twenty four 2.5 inch (SAS, SATA or Nearline SAS) front accessible drives in slots 0 through 23
24 x 2.5 inch drive backplaneUp to twenty SAS + 4 NVMe SAS/SATA drives in slots 0 to 19 + slots 20 to 23
24 x 2.5 inch drive backplaneUp to sixteen SAS + 8 NVMe SAS/SATA drives in slots 0 to 15 + slots 16 to 23
Figure 1. Connectors on the 24 x 2.5 inch drive backplane
This image shows the connectors on the 24 x 2.5 inch hard drive backplane.
  1. PCIe connector (BP PCIE B0)
  2. PCIe connector (BP PCIE A0)
  3. PCIe connector (BP PCIE B1)
  4. PCIe connector (BP PCIE A1)
  5. PCIe connector (BP PCIE B2)
  6. PCIe connector (BP PCIE A2)
  7. power connector (BP PWR_A)
  8. signal connector (BP SIG)
  9. power connector (BP PWR_B)
Figure 2. Connectors on the expander board
This image shows the connectors on the expander board.
  1. SAS connector (BP SAS B0)
  2. SAS connector (BP SAS A0)
  3. SAS connector (BP SAS A)
  4. SAS connector (BP SAS B)
  5. SAS connector (BP SAS C)
  6. SAS connector (BP SAS A1)
  7. SAS connector (BP SAS B1)
Figure 3. Connectors on the 8 x 2.5 inch drive backplane
This image shows the connectors on the 8 x 2.5 inch hard drive backplane.
  1. SAS connector (BP SAS B)
  2. SAS connector (BP SAS A)
  3. power connector (BP PWR)
  4. signal connector (BP SIG)

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