A SPARC M7-16 server is divided into four configurable units called DCUs. A DCU includes up to four CMIOUs, and each CMIOU contains 1 processor, 16 DIMM slots, and 3 PCIe expansion slots. The following illustration shows the locations of the DCUs.
DCUs are the building blocks of SPARC M7-16 server PDomains, and a PDomain can contain one to four DCUs. Using Oracle ILOM commands, you can combine DCUs into PDomains. Refer to the SPARC M8 and SPARC M7 Servers Administration Guide for instructions on creating and administering PDomains.