Sun Fire V240 Server
 
Sun Fire V210 Server
 

GCS>Sun Microsystems>Servers>Entry-Level Servers
 

sc> poweron

SC Alert: Host System has Reset
sc> console
Enter #. to return to ALOM
Done
0>Interrupt Crosscall....Done
0>Init Memory....|
0>ERROR: TEST = Probe Dimms
0>H/W under test = MB/P0/B1/D1 (Bank 2), Motherboard
0>Repair Instructions: Replace items in order listed by 'H/W under test' above
0>MSG = Dimm Pair incomplete
0>END_ERROR
\
1>ERROR: TEST = Probe Dimms
1>H/W under test = MB/P1/B1/D1 (Bank 2), Motherboard
1>Repair Instructions: Replace items in order listed by 'H/W under test' above
1>MSG = Dimm Pair incomplete
1>END_ERROR

Done

0>PLL Reset....Done
0>Init Memory....-
0>ERROR: TEST = Probe Dimms
0>H/W under test = MB/P0/B1/D1 (Bank 2), Motherboard
0>Repair Instructions: Replace items in order listed by 'H/W under test' above.
0>MSG = Dimm Pair incomplete.
0>END_ERROR

\

1>ERROR: TEST = Probe Dimms
1>H/W under test = MB/P1/B1/D1 (Bank 2), Motherboard
1>Repair Instructions: Replace items in order listed by 'H/W under test' above.
1>MSG = Dimm Pair incomplete.
1>END_ERROR

Done

0>Test Memory....Done
0>Test CPU Caches....Done
0>Functional CPU Tests....Done
0>IO-Bridge Tests....Done
0>ERROR:
0>      POST toplevel status has the following failures:
0>              MB/P0/B1/D1 (Bank 2), Motherboard
0>              MB/P1/B1/D1 (Bank 2), Motherboard
0>END_ERROR

0>

0>POST: Return to OBP.

================== End of POST ==================

the prtdiag output shows the memory configured as follows:

Memory Module Groups:
--------------------------------------------------
ControllerID   GroupID  Labels         Status
--------------------------------------------------
0              1        MB/P0/B1/D0    unused
0              1        -failed
0              0        MB/P0/B0/D0
0              0        MB/P0/B0/D1
1              1        MB/P1/B1/D0    unused
1              1        -failed
1              0        MB/P1/B0/D0
1              0        MB/P1/B0/D1

The DIMMs must be added in pairs to complete a bank, they cannot be installed singularly.

The POST errors and the prtdiag show that the DIMMs were installed so that they were evenly distributed between the 2 CPUs with 3 controlled by each processor, but they must be arranged so that they are installed in matched pairs. In this case we should have 4 controlled by CPU0 and 2 by CPU1. (we could have 4 controlled by CPU1 and 2 controlled by CPU0 also, the important thing is that they are installed in pairs.)

So it's important to correctly populate the DIMMs on the system board, especially when you are installing 3 pairs of DIMMs:

1. Below is the prtdiag output of memory with only four DIMMs installed.

Memory Module Groups:
--------------------------------------------------
ControllerID   GroupID  Labels         Status
--------------------------------------------------
0              0        MB/P0/B0/D0
0              0        MB/P0/B0/D1
1              0        MB/P1/B0/D0
1              0        MB/P1/B0/D1

2. When you try to install 6 DIMMs(3 pairs) into the system, below is the correct populating map.

Memory Module Groups:
--------------------------------------------------
ControllerID   GroupID  Labels         Status
--------------------------------------------------
0              1        MB/P0/B1/D0
0              1        MB/P0/B1/D1
0              0        MB/P0/B0/D0
0              0        MB/P0/B0/D1
1              0        MB/P1/B0/D0
1              0        MB/P1/B0/D1

After populating the memory as shown above, the system passed POST and the system was able to use all memory correctly.

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