We encountered error message as the following after we disabled some components on a SUN T2000 server:
SEP 29 19:34:35 ERROR: System DRAM Available: 004096 MB Physical: 008192 MB
This means that only 4Gb memory available although 8G is physically installed on the server. We can confirm the memory size from the following:
System Configuration: Sun Microsystems sun4v Sun Fire T200
Memory size: 3968 Megabytes
1. Why the server panic :
We don't have clear data for that . But normally Solaris 10 on T2000 Systems may Panic When Low on Memory. The system panics with the following panic string:
hypervisor call 0x21 returned an unexpected error 2
But in our case , that's also not happened .
2. The error which we can see from Alom:
MB/CMP0/CH0/R1/D1 : [Forced DIAG fail (POST)]
DIMMs with CEs are being unnecessarily flagged by POST as faulty. When POST encounters a single CE, the associated DIMM is declared faulty and half of system's memory is deconfigured and unavailable for Solaris. Since PSH (Predictive Self-Healing) is the primary means for detecting errors and diagnosing faults on the Niagara platforms, this policy is too aggressive (reference bug 6334560).
3.What action we can take now :
a) clear the SC log .
b)enable the component in SC .
c)Monitor the server .
if again same fault reports , we will replace the DIMM.
For more information about DIMM, you can refer to http://en.wikipedia.org/wiki/DIMM