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The iMana Reports DIMM Alarms

Publication Date:  2015-06-24 Views:  53 Downloads:  0
Issue Description
Hardware configuration:
Three DIMMs are installed in slots DIMM010, DIMM012, and DIMM030 respectively.

Symptom:

1.  The iMana reports that configurations in slots DIMM010 and DIMM012 are incorrect, as shown in Figure 1.

Figure 1 Configuration error



2.  On the iMana command-line interface (CLI), run ipmcget -t sensor -d list | grep -i dimm and check the DIMM status, as shown in Figure 2.

Figure 2 DIMM status



3.  Figure 2 shows that the DIMM in slot DIMM010 is detected but is faulty, the DIMM in slot DIMM030 is detected and operating properly, and the DIMM in slot DIMM012 is not detected and is faulty.
Handling Process
When installing DIMMs, ensure that DIMMs in the same memory channel are installed from the end far away from the CPU to the end near the CPU and no intermediate slot can be skipped. For example, DIMMs must be installed in slots DIMM010, DIMM011, and DIMM012 in sequence, and slot DIMM011 cannot be skipped.

Root Cause
If a DIMM is installed in an incorrect slot, the basic input/output system (BIOS) and management engine (ME) determine that the DIMM is not properly installed. In this case, DIMMs are installed in slots DIMM010 and DIMM012, but no DIMM is installed in slot DIMM011. Therefore, the BIOS and management engine determine that the DIMM in slot DIMM012 is not properly installed and report the error to the iMana. Then the iMana displays the configuration errors of slots DIMM010 and DIMM012.

DIMMs are installed in incorrect slots.

Suggestions
When the iMana reports DIMM faults, query DIMM status and check whether DIMMs are installed in incorrect slots.

Note:
DIMM status:

0x8000: indicates that no DIMM is installed.

0x8040: indicates that a DIMM is detected and operating properly.

0x8080: indicates that a DIMM is not detected and is faulty.

0x80C0: indicates that a DIMM is detected but is faulty.

END