Sun Microsystems X4440, X4240, X4140 manual BIOS DIMM Error Messages, DIMM Fault LEDs

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-nMemory 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.

Chapter 3 Troubleshooting DIMM Problems 15