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|Sun Server X2-8 Product Documentation Sun Server X2-8 (formerly Sun Fire X4800 M2) Documentation Library|
When a DIMM fails, the DIMM pair is disabled, and because of the system DIMM architecture, other DIMMs are disabled as well.
The Oracle ILOM PRSNT command reports these inaccurately. For example, 32 GB of DIMMs might be disabled, but only 16 GB are reported as disabled. Also, the faulted pair might be listed as Present.
For example, if D9 or D13 is faulty, in the Oracle ILOM System Monitoring > Sensor Readings tab, you might see:
/SYS/BL0/P0/D0/PRSNT Entity Presence Present but disabled /SYS/BL0/P0/D1/PRSNT Entity Presence Present but disabled /SYS/BL0/P0/D4/PRSNT Entity Presence Present but disabled /SYS/BL0/P0/D5/PRSNT Entity Presence Present but disabled /SYS/BL0/P0/D8/PRSNT Entity Presence Present /SYS/BL0/P0/D9/PRSNT Entity Presence Present /SYS/BL0/P0/D12/PRSNT Entity Presence Present /SYS/BL0/P0/D13/PRSNT Entity Presence Present
Note - When the fault is cleared, the system re-enables the DIMM pairs that it had disabled.