How to tell whether ECC (memory) is enabled?

Thomas Zander thomas.e.zander at
Fri Nov 5 16:38:13 UTC 2010


is there any way to inspect a running STABLE machine for the presence
or state of ECC memory before an MCA "error detected" message actually
In comparison when I quickly boot the machine in question with a Linux
live CD, I find (among other EDAC messages) the following output in
its dmesg:

EDAC amd64: ECC is enabled by BIOS, Proceeding with EDAC module initialization

During POST, die BIOS also tells me that ECC memory is installed, so
far so good. But I was a little surprised that the FreeBSD kernel
tells me absolutely nothing about it. Or do I have to tune loader.conf


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