Sun Microsystems Sun Fire X4240 - Manual (Page 25)

Chapter 3 Troubleshooting DIMM Problems 15
to view ECC errors
■ Linux:
The HERD utility can be used to manage DIMM errors in Linux. See the x64
Servers Utilities Reference Manual for details.
■
If HERD is installed, it copies messages from /dev/mcelog to
/var/log/messages
.
■
If HERD is not installed, a program called mcelog copies messages from
/dev/mcelog to /var/log/mcelog
.
The Bootable Diagnostics CD described in Chapter 2 also captures and logs CEs.
BIOS DIMM Error Messages
The BIOS displays and logs the following DIMM error messages:
NODE- n Memory Configuration Mismatch
The following conditions will cause this error message:
■
The DIMMs mode is not paired (running in 64-bit mode instead of 128-bit
mode).
■
The DIMMs’ speed is not same.
■
The DIMMs do not support ECC.
■
The DIMMs are not registered.
■
The MCT stopped due to errors in the DIMM.
■
The DIMM module type (buffer) is mismatched.
■
The DIMM generation (I or II) is mismatched.
■
The DIMM CL/T is mismatched.
■
The banks on a two-sided DIMM are mismatched.
■
The DIMM organization is mismatched (128-bit).
■
The SPD is missing Trc or Trfc information.
DIMM Fault LEDs
When you press the Press to See Fault button on the motherboard or the mezzanine
board, LEDs next to the DIMMs flash to indicate that the system has detected 24 or
more CEs in a 24-hour period on that DIMM.