DIMMs follow the naming convention /SYS/CMIOUx/CM/CMP/BOByw/CHz/DIMM with the following values:
SPARC M8-8 and SPARC M7-8: CMIOU0 to CMIOU7
SPARC M7-16: CMIOU0 to CMIOU15
BOB number (where y is 0 to 3 and w is 0 or 1)
DDR channel number (where z is 0 or 1)
For information about the DIMM layout, see DIMM and eUSB Locations in a CMIOU in SPARC M8 and SPARC M7 Servers Service Manual.