The enclosure has two PCIe switches integrated on the system board which map the Shared PERC storage slots and PCIe expansion slots to the PCIe mezzanine cards on the server modules.
NOTE: Before mapping or unmapping a PCIe device, the server module must be turned off.
NOTE: The PCIe switch mapping is controlled by the firmware and depends on the software license installed on the system:
With base licensing, each server module can be mapped to a maximum of two PCIe slots.
With the advanced licensing, a server module can map all available PCIe slots.
Default factory configuration has all PCIe slots unmapped.
For more information about PCIe slot configuration licensing, see the
Dell Chassis Management Controller for Dell PowerEdge VRTX User’s Guide at
Dell.com/esmmanuals.
The switches map the mezzanine cards to the PCIe slots on the enclosure's system board. There are five PCIe low profile slots on the system board and three full-height, full-length PCIe slots on the PCIe riser. All the PCIe slots can be mapped to the PCIe mezzanine cards on the server modules to provide I/O expansion for the system:
PCIe mezzanine Fabric B and Fabric C cards on each server module are mapped to the PCIe switches which further map to the PCIe slots and the Shared PERC slots on the enclosure's system board.
