A CMU is divided into lower and upper halves, as shown below.
CMP0 and its DIMM slots are outlined in blue. Note that CMP 0 is in the lower half of the CMU.
CMP1 and its DIMM slots are outlined in red. CMP 1 is in the upper half of the CMU.
Both sets of DIMM slots use the same numbering system (D0000 to D1113), so to specify the exact location of a DIMM, all of the following information must be provided:
DIMM slot number (D0000 to D1113)
CMP module number (CMP0 to CMP1)
CMU board number (CMU0 to CMU15)
For example, this error message identifies faulty DIMMs on two different CMUs.
2012-09-06/17:16:20 ereport.hc.dev_fault@/SYS/CMU5/CMP0/D1111 2012-09-06/17:16:20 ereport.hc.dev_fault@/SYS/CMU8/CMP1/D1113
In the first line, DIMM D1111 is located by CMP0 on CMU5.
In the second line, DIMM D1113 is located by CMP1 on CMU8.