This section contains reference information for PCIe cards and DPCCs, including DPCC population rules.
The server contains nine low-profile PCIe slots, eight Gen 3 DPCC slots, accessible at the rear of the server, and one Gen 2 slot, which is located internally (and not directly accessible) on the system module (SMOD). This internal slot is used for server HBA and provides SAS connectivity to the server storage drives.
The server contains eight hot-service PCIe Gen 3 DPCCs. Each DPCC has two low-profile PCIe Gen 3 slots, an 8-lane slot and a 16-lane slot. Each DPCC can contain up to two PCIe cards.
DPCCs connect directly to connectors on the back of the CMODs, so DPCCs and CMODs have a one-to-one relationship with one another. In a four CMOD-configured server, the first four slots (right to left from the back of the server), are active. In an eight CMOD-configured server, all eight slots are active.
Two indicator panels are located on the front of the DPCC. Both panels include an OK indicator, a Service Action Required indicator, and two ATTN buttons. The buttons are used to alert the OS to a request for DPCC/PCIe card removal and to request acknowledgement of a DPCC installation. For a DPCC removal, the OS responds by lighting the indicators on the front of the DPCC. For an installation, the OS lights the green OK indicators.
One populated DPCC must be installed for each CMOD (four or eight populated DPCCs).
All eight DPCCs must be installed in the system regardless of the system configuration and whether the DPCC contains a PCIe card.