EDAC memory setup

On one of our file servers based on Supermicros X7DVL which has 6 memory seats labeled {1,2}{A,B,C}. Unfortunately, one needs two DIMMs (showing up as 2 banks(?) with 2048 MB each) for the system to boot and also not all combinations are possible. Also, it seems that in some combinations the second DIMM never show up... However, we got some results:

# edac-util --report=full
mc0:csrow0:all:UE:0
mc0:csrow0:all:CE:0
mc0:csrow0:ch0:CE:0
mc0:csrow0:ch1:CE:0
mc0:csrow1:all:UE:0
mc0:csrow1:all:CE:0
mc0:csrow1:ch0:CE:0
mc0:csrow1:ch1:CE:0
mc0:csrow2:all:UE:0
mc0:csrow2:all:CE:0
mc0:csrow2:ch0:CE:0
mc0:csrow2:ch1:CE:0
mc0:csrow3:all:UE:0
mc0:csrow3:all:CE:0
mc0:csrow3:ch0:CE:0
mc0:csrow3:ch1:CE:0
mc0:noinfo:all:UE:0
mc0:noinfo:all:CE:0

1A-1B

# head dimm1a-dimm1b/mc/mc?/csrow?/size_mb                                              
==> dimm1a-dimm1b/mc/mc0/csrow0/size_mb <==
2048
==> dimm1a-dimm1b/mc/mc0/csrow1/size_mb <==
2048
==> dimm1a-dimm1b/mc/mc0/csrow2/size_mb <==
2048
==> dimm1a-dimm1b/mc/mc0/csrow3/size_mb <==
2048

1A-1C

# head dimm1a-dimm1c/mc/mc?/csrow?/size_mb 
==> dimm1a-dimm1c/mc/mc0/csrow0/size_mb <==
2048
==> dimm1a-dimm1c/mc/mc0/csrow1/size_mb <==
2048

1A-2A

# head dimm1a-dimm2a/mc/mc?/csrow?/size_mb                      
==> dimm1a-dimm2a/mc/mc0/csrow0/size_mb <==
4096
==> dimm1a-dimm2a/mc/mc0/csrow1/size_mb <==
4096

1A-2C

# head dimm1a-dimm2c/mc/mc?/csrow?/size_mb 
==> dimm1a-dimm2c/mc/mc0/csrow0/size_mb <==
2048
==> dimm1a-dimm2c/mc/mc0/csrow1/size_mb <==
2048

-- CarstenAulbert - 14 Apr 2009