Full-population and half-population configurations are supported. The figure shows a CMIOU with all of the DIMM slots populated with DIMMs. In a half-populated configuration, DIMMs are installed only in the slots displayed in black.
Follow these guidelines when replacing DIMMs in a CMIOU:
SPARC M8-8 servers: Use either all 32-Gbyte or all 64-Gbyte DDR4 DIMMs.
SPARC M7-8 and SPARC M7-16 servers: Use all 16-Gbyte, all 32-Gbyte, or all 64-Gbyte DDR4 DIMMs.
Ensure that all DIMMs in a CMIOU are the same size and type. Do not mix 32GB LRDIMMs (4R x 4Gb) and 32 GB RDIMMs (2R x 8Gb) in the same CMIOU.
If you are using DIMMs of different capacities in the same host, ensure that all DIMMs in a CMIOU have the same capacity.
Use only Oracle qualified DIMMs.
The SPARC M8 CMIOU DIMM locations and the buffer chip (BOB) and DDR channel (CH) numbers are as follows:
The SPARC M7 CMIOU DIMM locations and the buffer chip (BOB) and DDR channel (CH) numbers are as follows: